Iec 60731 2016

6 8.2 Con tru tional req irements on MEASU IN AS EMBLIE.. The tec nical modification vers s the secon edition of this stan ard con ern p rforman e req irements of R DIOTHER PY DOSIME ERS

THIS PUBLICATION IS COPYRIGHT PROT CTED

Copyright © 2 16 IEC, Ge e a, Switzerla d

Al rig ts reserv d Unles oth rwise sp cifie , n p rt of this p blc tio ma b re ro u e or uti ze in a y form

or b a y me ns,ele tro ic or me h nic l in lu in p oto o yin a d microfim, with ut p rmis io in writin from

eith r IEC or IEC's memb r Natio al Commite in th c u try of th re u ster If y u h v a y q estio s a o t IEC

c p rig t or h v a e q iry a o t o tainin a ditio al rig tsto this p blc tio , ple se c nta t th a dres b low or

y ur lo al IEC memb r Natio al Commite for furth r informatio

Droits d re ro u tio réserv s Sa f in ic tio c ntraire, a c n p rtie d c te p blc tio n p ut être re ro uite

ni uti sé so s q elq e forme q e c soit et p r a c n pro é é, éle tro iq e o mé a iq e, y c mpris la p oto o ie

et les microfims, sa s la c rd é rit d l EC o d Comité n tio al d l EC d p ys d d ma d ur Si v usa ez d s

q estio s sur le c p rig t d l EC o si v us d sirez o te ir d s droits su pléme taires sur c te p blc tio , uti sez

les c ord n é s ci-a rès o c nta tez le Comité n tio al d l EC d v tre p ysd résid n e

Th Intern tio al Ele trote h ic l Commis io (IEC) is th le din glo al org nizatio th t pre ares a d p blsh s

Intern tio al Sta d rds for al ele tric l ele tro ic a d relate te h olo ies

Ab ut IEC publ c tio s

Th te h ic l c nte t of IEC p blc tio s is k pt u d r c nsta t re iew b th IEC Ple se ma e sure th t y u h v th

latest e itio , a c rig n a or a ame dme t mig t h v b e p blsh d

IEC Catalog e - webstore.ie c / catalog e

Th sta d-alo e a plc tio for c nsultin th e tire

biblo ra hic l infor matio o IEC Inter natio al Sta d rds,

Te h ic l Sp cific tio s, Te h ic l Re orts a d oth r

d c me ts Av ia le for PC, Ma OS, An r oid Ta lets a d

iPa

IEC publc tio s s arc - w w.ie c /se rc pub

Th a v n e se rc e a les to fin IEC p blc tio s b a

v riety of crite a (r efer en e n mb r, te t, te h ic l

c mmite ,…) It also giv s informatio o pr oje ts, re la e

a d w ith r awn p blc tio s

IEC J st Publs ed - webstore.ie c / j stpubls ed

Sta u to d te o al n w IEC p blc tio s Just Pu lsh d

d tais al n w p blc tio s rele se Av ia le o ln a d

also o c a mo th b emai

Ele to edia - ww w.ele to edia.org

Th w or l 's le din o ln dictio ary of ele tro ic a d

ele tr i al terms c ntainin 2 0 0 ter ms a d d finitio s in

En lsh a d Fre c , w ith e uiv le t terms in 15 a ditio al

la g a es Also k now n as th Inter natio al Ele tr ote h ic l

Vo a ulary (IEV) o ln

IEC Glos ary - std.ie c / glos ary

6 0 0 ele trote h ic l ter min lo y e tr i s in En lsh a d

Fre c e tr acte from th Terms a d Definitio s cla se of

IEC p blc tio s is u d sin e 2 0 Some e tr i s h v b e

c le te fr om e rler p blc tio s of IEC TC 3 , 7 , 8 a d

CIS R

IEC Cu tomer Serv ic Cente - webstore.ie c / cs

If y u w ish to giv us y our fe d a k o this p blc tio or

n e furth r as ista c ,ple se c nta t th Customer Ser vic

Ce tr e: csc@ie c

A pro os de lIEC

L Commis io Ele trote h iq e Intern tio ale (IEC) est la première org nisatio mo diale q i éla ore et p ble d s

Normes intern tio ales p ur to t c q i a trait à léle tricité, à léle tro iq e et a x te h olo ies a p re té s

A pro os de publc tio s IEC

L c nte u te h iq e d s p blc tio s IEC est c nstamme t re u Ve i ez v us as urer q e v us p s é ez lé itio la

plus ré e te, u c rig n um o ame d me t p ut a oir été p blé

Catalog e IEC - webstore.ie c / catalog e

Ap lc tio a to ome p ur c nsulter to s les r enseig eme ts

biblo ra hiq es sur les Normes intern tio ales,

Sp cific tio s te h iq es, Ra p r ts te h iq es et a tr es

d c me ts d l EC Disp nible p ur PC, Ma OS, ta letes

An roid et iPa

Re h rc e de publc tio s IEC - w w.ie c / se rc pub

L r ec er ch a a c e p rmet d tr ou er d s p blc tio s IEC

e uti sa t difér ents c tères (n mér o d référe c , te te,

c mité d’étu es,…) Ele d n e a s i d s infor matio s sur les

pr ojets et les p blc tio s rempla é s o r etir ées

IEC J st Publs ed - webstore.ie c / j stpubls ed

Restez infor mé sur les n u eles p blc tio s IEC Just

Pu lsh d d tai e les n u eles p blc tio s p r ues

Disp nible e lg e et a s i u e fois p r mois p r emai

Ele to edia - ww w.ele to edia.org

L pr emier dictio n ir e e lg e d ter mes éle tro iq es et

éle tr i u s I c ntie t 2 0 0 termes et d finitio s e a glais

et e fr an ais, ainsi q e les ter mes é uiv le ts d ns 15

la g es a ditio n les Eg leme t a p lé Vo a ulaire

Ele tr ote h iq e Inter natio al (IEV) e lg e

Glos aire IEC - std.ie c / glos ary

6 0 0 e tré s termin lo iq es éle tr ote h iq es, e a glais

et e fr an ais, e tr aites d s articles Ter mes et Définitio s d s

p blc tio s IEC p r ues d p is 2 0 Plus c rtain s e tr ées

a té e res e traites d s p blc tio s d s CE 3 , 7 , 8 et

CIS R d l EC

Serv ic Clents - webstore.ie c / cs

Si v us d sir ez n us d n er d s c mme tair es sur c te

p blc tio o si v us a ez d s q estio s c nta tez-n us:

csc@ie c

Warnin ! Mak e s re th t y ou o tain d this publc tion from a a thorize distributor

Ate tion! Ve i ez v ou a s rer qu v ou av ez o te u c te publc tion via u distribute r a ré

CONTENTS

FOREWORD 6

INTRODUCTION 8

1 Sco e an o ject

9 1.1 Sco e 9

1.2 Object 9

2 Normative referen es 9

3 Terms an definition 10 4 General req irements 2

4.1 BASIC SAF TY and E S NTIAL P RFORMA CE 2

4.2 Performan e req irements 2

4.3 RE EREN E V LUE an S A D R T S V LUE 2

4.4 General test con ition an method 2

4.4.1 STA DA D T S CON ITIONS 2

4.4.2 Test of comp nents 2

4.4.3 RAT D or E F CTIVE R N E of dose (or KERMA) rates 2

4.4.4 UNCERTAINTY OF MEASUREMENT 2

4.4.5 Adju tments d rin test 2

4.4.6 Test con ition p rtic lar to C AMB R AS EMBLIE 2

4.4.7 Test con ition p rtic lar to MEASU ING AS EMBLIE 2

4.4.8 Test con ition p rtic lar to S ABILITY C EC DEVICE 2

4.4.9 Use of S ABILITY C EC DEVICE 2

4.5 Summary ta les 2

4.6 Clas ification of eq ipment ac ordin to LIMIT OF V RIATION 3

4.6.1 FIELD-CLAS DOSIME ER 3

4.6.2 RE ERENCE-CLAS DOSIME ER 3

4.6.3 SC NNIN -CLAS DOSIME ER 3

5 CHAMB R AS EMBLY p rforman e req irements 3

5.1 General 3

5.2 General p rforman e req irements for (R DIOTHERAPY) IONIZATION CH MB RS 3

5.2.1 CHAMB R AS EMBLY LEA A E C RRENT without IR A IATION 3

5.2.2 Sta i ty 3

5.2.3 STABILIZATION TIME 3

5.2.4 Post ir adiation le k ge 3

5.2.5 RAT D or E F CTIVE R N E of dose rate (contin ou radiation) 3

5.2.6 Maximum R T D dose p r pulse (pulsed radiation) 3

5.2.7 RAT D R N E of field sizes 3

5.2.8 STR Y R DIATION 3

5.2.9 Guard/colector in ulation 3

5.2.10 Ca le micro hon 3

5.2.1 Polarity of p larizin voltage ef ect 3

5.2.12 ELECTROMA NE IC COMPATIBILITY 4

5.3 Performan e req irements p rtic lar to SHEL C AMB RS 4

5.3.1 De en en e on R DIATION QU LITY 4

5.3.2 RAT D R N E of field sizes 4

5.3.3 Chamb r orientation 4

5.4 Performan e req irements p rtic lar to PA AL EL-PLAT CH MB RS 4

5.4.1 De en en e on R DIATION QU LITY 4

5.4.2 Chamb r orientation 4

5.5 Performan e req irements p rtic lar to VENT D C AMB RS 4

5.5.1 Atmospheric pres ure c an e 4

5.5.2 Temp rature 4

5.5.3 Humidity 4

5.6 Performan e req irements p rtic lar to S ALED C AMB RS 4

5.6.1 Atmospheric pres ure c an e 4

5.6.2 Temp rature 4

6 MEASU INGAS EMBLY p rforman e req irements 5

6.1 General 5

6.2 General p rforman e req irements for R DIOTHER PY DOSIME ER S 5

6.2.1 EF ECTIVE R N E 5

6.2.2 RE OLUTION of the display or data output terminal 51

6.2.3 Re e ta i ty 51

6.2.4 L n - erm sta i ty 51

6.2.5 STABILIZATION TIME 5

6.2.6 ELECTROMA NE IC COMPATIBILITY 5

6.3 Performan e req irements p rtic lar to dosimeters 5

6.3.1 ZER O D IF 5

6.3.2 ZERO SHIF 5

6.3.3 NON-LINEA ITY 5

6.3.4 Ran e c an in 5

6.3.5 De d time 5

6.3.6 Temp rature 5

6.3.7 Humidity 5

6.3.8 STR Y R DIATION ef ect 5

6.3.9 Charge le k ge 5

6.3.10 Dose rate de en en e of dosimeters 5

6.4 Performan e req irements p rtic lar to dose rate meters 6

6.4.1 ZERO D IF 6

6.4.2 ZER O SHIF 61

6.4.3 NON-LINEA ITY 6

6.4.4 Ran e c an in 6

6.4.5 RE PONS TIME 6

6.4.6 Temp rature 6

6.4.7 Humidity 6

6.4.8 STR Y R DIATION ef ect 6

6.5 Performan e req irements p rtic lar to b t ery-o erated MEASU IN AS EMBLIE 6

6.6 Performan e req irements p rtic lar to s p ly main -o erated MEASU IN AS EMBLIE 6

6.6.1 MAINSVOLTA E – static 6

6.6.2 M AINSVOLTA E – V RIATI ON d rin a me s rement 6

7 STABILITY C EC DEVICE p rforman e req irements 6

7.1 General 6

7.2 General p rforman e req irements for S ABILITY CHEC DEVICE 6

7.2.1 L n - erm sta i ty 6

7.2.2 Re e ta i ty 6

8 Con tru tional req irements as related to P RFORMA CECH R CT RIS ICS 6

8.1 Con tru tional req irements on C AMB R AS EMBLIE 6

8.2 Con tru tional req irements on MEASU IN AS EMBLIE 6

8.2.1 Adju tment of RE PONS 6

8.2.2 Display device 6

8.2.3 Batery in ication an comp n ation 7

8.2.4 Input c r ent thres old 7

8.2.5 Automatic termination of me s rement in the dose mode 7

8.3 Con tru tional req irements on S ABILITY C ECK DEVICE 71

8.3.1 Output of the S ABILITY C EC DEVICE 71

8.3.2 Con tru tional req irements p rtic lar to a radio ctive typ S ABILITY C EC DEVICE 71

8.3.3 Con tru tional req irements p rtic lar to an overal S ABILITY CHEC DEVICE 71

8.4 Con tru tional req irements on PH NTOMS an bui d-up ca s 71

9 Markin 7

9.1 Markin req ired on C AMB R AS EMBLY 7

9.1.1 Information req ired in IEC 6 6 1-1 7

9.1.2 Other information 7

9.1.3 Compl an e c eck 7

9.2 Markin req ired on MEASU IN AS EMBLY 7

9.2.1 CHAMB R AS EMBLY in contact with the PATIENT 7

9.2.2 CHAMB R AS EMBLY not in contact with the PATIENT 7

9.2.3 Eac MEASU IN AS EMB LY 7

9.2.4 MEASU INGAS EMBLY with a display s aled in dose 7

9.2.5 Multi-ran e MEASU ING AS EMBLY 7

9.2.6 MEASU INGAS EMBLY with more than one c amb r 7

9.2.7 Gra hical s mb ls 7

9.2.8 Compl an e c eck 7

9.3 Markin req ired on S ABILITY C EC DEVICE 7

9.3.1 General 7

9.3.2 STABILITY CHEC DEVICE containin a R DIOA TIVE SOU CE 7

9.3.3 Device whic contributes to protection again t IONIZING RA IATION 7

9.3.4 Compl an e c eck 7

9.4 Markin req ired on PH NTOM or bui d-up ca 7

10 AC OMPA YIN DOC MENT 7

10.1 AC OMPA YIN DOC MENT for C AMB R AS EMBLY 7

10.1.1 INS R CTIONS FOR US of C AMB R AS EMBLY 7

10.1.2 Test s e t for C AMB R AS EMBLY 7

10.1.3 Cal bration certificate for C AMB R AS EMBL Y 7

10.2 AC OMPA YIN DOC MENT for MEASURIN AS EMBLY 7

10.2.1 INS R CTIONS FOR US of MEASU IN AS EMBLY 7

10.2.2 Test s e t for MEASURIN AS EMBLY 7

10.2.3 Cal bration certificate for MEASU IN AS EMBLY 8

10.3 AC OMPA YIN DOCUMENT for S ABILITY C ECK DEVICE 8

10.3.1 INS R CTIONS FOR US of S ABILITY C ECK DEVICE 8

10.3.2 Test s e t for S ABILITY C ECK DEVICE 81

10.3.3 Me s rement certificate for S ABILITY C EC DEVICE 81

10.4 AC OMPA YIN DOC MENT for PH NTO S an bui d-up ca s 8

An ex A (informative) Values, er or an U CERTAINTY 8

An ex B (normative) Test eq ipment for ca le micro hon 8

An ex C (normative) UNCERTAINTY OF MEASU EMENT 8

Bibl ogra h 9

In ex of defined terms u ed in this stan ard 9

Fig re 1 – Toleran e of de th in PH NTOM 7

Fig re 2 – Toleran e of lateral p sition in PHA TOM 7

Fig re A.1 – Gra hical i u tration of values, er or an U CERTAINTY 8

Fig re B.1 – Test eq ipment for ca le micro hon 8

Fig re C.1 – PROBABILITY DIS RIBUTIONS for the P RFORMA CE C A A T RIS ICS to b within the LIMIT OF V RIATION ± an the expres ion of their V RIA CE in terms of L 8

Ta le 1 – RE EREN E CON ITIONS an S A D R T S CON ITIONS – C AMB R AS EMBLY 2

Ta le 2 – RE EREN E CON ITIONS an S A D R T S CON ITIONS – MEASU IN AS EMBLY 2

Ta le 3 – Limits of P RFORMA CE C A A T RIS ICS at S A D R T S CON ITIONS – CH MB R AS EMBLY 2

Ta le 4 – Limits of P RFORMA CE C A A T RIS ICS at S A D R T S CON ITIONS – MEASU ING AS EMBLY 2

Ta le 5 – LIMIT OF V RIATION of P RFORMA CE C A A T RIS ICS for ef ects of INFLUEN E QU NTITIE an INS R MENT PA AME ERS – C AMB R AS EMBLY 2

Ta le 6 – LIMIT OF V RIATION of P RFORMA CE C A A T RIS ICS for ef ects of INFLUEN E QU NTITIE an INS R MENT PA AME ERS – MEASURIN AS EMBLY 31

Ta le 7 – LIMIT OF V RIATION of P RFORMA CE C A A T RIS ICS for ef ects of INFLUEN E QU NTITIE an INS R MENT PA AME ERS – c amb r an MEASURIN AS EMBLIE combined 3

Ta le C.1 – Estimate of COMBINED S A DA D U CERTAINTY for p rforman e of a h p thetical dosimeter 9

Ta le C.2 – A h p thetical example of the as es ment of the U CERTAINTIE on the output me s rement of an X-ray set u in a FIELD-CLAS DOSIME ER 9

INTERNATIONAL ELECTROTECHNICAL COMMISSION

1) Th Intern tio al Ele trote h ic l Commis io (IEC) is a worldwid org nizatio for sta d rdizatio c mprisin

al n tio al ele trote h ic l c mmite s (IEC Natio al Commite s) Th o je t of IEC is to promote

intern tio al c -o eratio o al q estio s c n ernin sta d rdizatio in th ele tric l a d ele tro ic fields To

this e d a d in a ditio to oth r a tivities, IEC p blsh s Intern tio al Sta d rds, Te h ic l Sp cific tio s,

Te h ic l Re orts, Pu lcly Av ia le Sp cific tio s (PAS) a d Guid s (h re fer refere to as “IEC

Pu lc tio (s)”) Th ir pre aratio is e truste to te h ic l c mmite s; a y IEC Natio al Commite intereste

in th su je t d alt with ma p rticip te in this pre aratory work Intern tio al g v rnme tal a d n

n-g v rnme tal org nizatio s laisin with th IEC also p rticip te in this pre aratio IEC c la orates closely

with th Intern tio al Org nizatio for Sta d rdizatio (ISO) in a c rd n e with c n itio s d termin d b

a re me t b twe n th two org nizatio s

2) Th formal d cisio s or a re me ts of IEC o te h ic l maters e pres , as n arly as p s ible, a intern tio al

c nse sus of o inio o th rele a t su je ts sin e e c te h ic l c mmite h s re rese tatio from al

intereste IEC Natio al Commite s

3) IEC Pu lc tio s h v th form of re omme d tio s for intern tio al use a d are a c pte b IEC Natio al

Commite s in th t se se Whie al re so a le eforts are ma e to e sure th t th te h ic l c nte t of IEC

Pu lc tio s is a c rate, IEC c n ot b h ld resp nsible for th wa in whic th y are use or for a y

misinterpretatio b a y e d user

4) In ord r to promote intern tio al u iformity, IEC Natio al Commite s u d rta e to a ply IEC Pu lc tio s

tra sp re tly to th ma imum e te t p s ible in th ir n tio al a d re io al p blc tio s An div rg n e

b twe n a y IEC Pu lc tio a d th c r esp n in n tio al or re io al p blc tio sh l b cle rly in ic te in

th later

5) IEC itself d es n t pro id a y atestatio of c nformity In e e d nt c rtific tio b dies pro id c nformity

as es me t servic s a d, in some are s, a c s to IEC marks of c nformity IEC is n t resp nsible for a y

servic s c rie o t b in e e d nt c rtific tio b dies

6) Al users sh uld e sure th t th y h v th latest e itio of this p blc tio

7) No la i ty sh l ata h to IEC or its dire tors, emplo e s, serv nts or a e ts in lu in in ivid al e p rts a d

memb rs of its te h ic l c mmite s a d IEC Natio al Commite s for a y p rso al injury, pro erty d ma e or

oth r d ma e of a y n ture wh tso v r, wh th r dire t or in ire t, or for c sts (in lu in le al fe s) a d

e p nses arisin o t of th p blc tio , use of, or rela c u o , this IEC Pu lc tio or a y oth r IEC

Pu lc tio s

8) Ate tio is drawn to th Normativ refere c s cite in this p blc tio Use of th refere c d p blc tio s is

in isp nsa le for th c re t a plc tio of this p blc tio

9) Ate tio is drawn to th p s ibi ty th t some of th eleme ts of this IEC Pu lc tio ma b th su je t of

p te t rig ts IEC sh l n t b h ld resp nsible for id ntifyin a y or al su h p te t rig ts

International Stan ard IEC 6 7 1 has b en pre ared by s bcommite 6 C: Eq ipment for

radiothera y, n cle r medicine an radiation dosimetry of IEC tec nical commite 6 :

Electrical eq ipment in medical practice

The tec nical modification vers s the secon edition of this stan ard con ern p rforman e

req irements of R DIOTHER PY DOSIME ERS inten ed for the me s rement of AB ORB D DOS

TO WAT R or AIR KERMA in he v ion RA IATION FIELDS an SC N ING-CLAS DOSIME ERS

normal y u ed for relative dose distribution me s rements with a SC NNIN SYS EM s c as an

automatic water PH

NTOM

In this stan ard, the fol owin print typ s are u ed:

– req irements, compl an e with whic can b tested, an definition : in roman typ ;

– e pla atio s, a vic , g n ral stateme ts, e c ptio s a d n tes: in smal roma ty e;

– test sp e cificato s: n ialc typ e;

– terms u ed throu hout this p rtic lar stan ard that have b en l sted in the In ex of

defined terms an defined in Clau e 3, or in other stan ard : SMAL CAPITALS

The commit e has decided that the contents of the b se publ cation an its amen ment wi

remain u c an ed u ti the sta i ty date in icated on the IEC we site u der

"ht p:/we store.iec.c " in the data related to the sp cific publcation At this date, the

This International Stan ard is a pl ca le to the p rforman e of R DIOTHER PY DOSIME ERS

with IONIZATION C AMB RS as u ed in RA IOTHERAPY

The efectivenes of tre tment of PATIENT receivin R DIOTHERAPY de en s on the ac urac

of the dose of radiation received, as wel as on the ac urac of their sp tial distribution An

ex es ive dose can le d to ex es ive tis ue damage, whi e an in uficient dose wi not

provide the thera eutic b nefit sou ht The eq ipment covered by this stan ard play an

es ential p rt in ac ievin the req ired ac urac

This stan ard is not con erned with the safety asp cts of dosimeters The relevant IEC

stan ard coverin safety de en up n the way in whic the dosimeter is u ed:

– if it is u ed in the PATIENT en ironment, the req irements for safety a plyin to dosimeters

with IONIZATION C AMB RS as u ed in R DIOTHER PY are contained in IEC 6 6 1-1;

– if it is not u ed in the PATIENT en ironment, then the safety req irements for dosimeters

with IONIZATION C AMB RS as u ed in R DIOTHER PY are contained in IEC 61010-1

Dosimeters whic comply with this stan ard s ould nevertheles b u ed in ac ordan e with

the relevant national or international dosimetry protocol (code of practice) In p rtic lar,

me s rements s ould b made to determine the ion col ection ef icien y an p larity ef ect of

This International Stan ard sp cifies the p rforman e req irements of R DIOTHERAPY

DOSIME ERS, inten ed for the me s rement of AB ORB D DOS TO WAT R or AIR KERMA (an

their rates an sp tial distribution ) in PHOTON, ELECTRON, proton or he v ion R DIATION

FIELDS as u ed in R DIOTHER PY

The DOS MONITORIN SYS EMS in orp rated in R DIOTHERAPY tre tment mac ines are not

covered by this stan ard, neither are the re-entrant IONIZATION CH MB RS u ed for

BR C YTHER PY source cal bration an con tan y c eck devices

This stan ard is a pl ca le to the fol owin typ s of dosimeter:

a) FIELD-CLAS DOSIME ERS normal y u ed for

1) the me s rement of KERMA or dose in a R DIATION B AM, either in air or in a PH NTOM;

2) in vivo skin s rface or intracavitary me s rements of dose on PATIENT

b) RE EREN E-CLAS DOSIME ERS normal y u ed for the cal bration of FIELD-CLAS

DOSIME ERS;

NOT RE ERE CE-CLA S DOSIME ERS ma b use as FIELD-CLA S DOSIME ERS

c) SCA NIN -CLAS DOSIME ERS normal y u ed for relative dose distribution me s rements

with a SC N ING SYS EM s c as an automatic water PH NTOM

1.2 Object

The o ject of this stan ard is:

– to esta l s req irements for a satisfactory level of p rforman e for R DIOTHERAPY

DOSIME ERS;

– to stan ardize method for the determination of compl an e with this level of p rforman e

Thre levels of p rforman e are sp cified:

– a lower level of p rforman e a plyin to FIELD-CLAS DOSIME ERS;

– a hig er level of p rforman e a plyin to RE ERENCE-CLAS DOSIME ERS;

– a sp cific level of p rforman e a plyin to SCA NIN -CLAS DOSIME ERS

2 Normative referenc s

The folowin referen ed doc ments are in isp n a le for the a pl cation of this doc ment

For dated referen es, only the edition cited a pl es For u dated referen es, the latest edition

of the referen ed doc ment (in lu in an amen ments) a pl es

IEC 6 417, G ra hical symb ols for use o e u ipme t

IEC 6 6 1-1:2 0 , Medical electrical e u ipme nt – Part 1: G en ral re u ireme ts for b asic

IEC 6 6 1-1-2:2 0 , Me dical electrical e uipme t – Part 1-2: G en ral re quireme ts for b asic

safety a d es e tal p erforma ce – Colateral sta dard: Electromagnetc comp tb il y –

Re u ireme ts a d tests

IEC 6 6 1-1-3:2 0 , Medical electrical e qu ipme nt – Part 1-3: G en ral re u irem ents for b asic

safety a d e sse tal p rform ance – Colateral Sta dard: Radiato p rotecto in dia n stc

X-ra e uip me nt

IEC 6 6 1-2-8:2 10, Me dical e le ctrical e u ipme nt – Part 2-8: Partcu lar re u ireme ts for th

b asic safety a d es e tal pe rforma ce of th rap eu tic X-ra e uipme t op eratn in th ra g

10 kV to 1 MV

IEC/TR 6 7 8:2 0 , Me dical electrical e u ip me t – Glos ary of defin d te rms

IEC 6 9 6:2 0 , Medical electrical e uipme t – Me dical electro ac elerators – Functo al

pe rforma ce ch racteristc

IEC 61010-1:2 10, Safety re u ireme ts for ele ctrical e u ip me t for me su reme nt, co trol,

a d lab oratory use – Part 1: G en ral re u ireme ts

IEC 61 8 , Ele ctrical a d electro ic me surin e uipme t – Docume tato

IEC 612 7:2 0 , Medical diagnostc X-ra e u ip me t – Radiato co di o s for use in th

determin to of ch racteristc

IEC 616 6:2 0 , Me dical ele ctrical e uip me t – Dosimetric instru me nts use d forn n-n asiv

me sureme t ofX-ra tu b e v lage in dia n stc radiolo y

ISO/IEC Guide 9 -3:2 0 , Uncertainty of me surem ent – Part 3: G u ide to th e p res io of

unce rtainty in me sureme t (GUM:19 5)

ISO/IEC Guide 9 :2 0 , Intern to al v cab ulary of metrolo y – Basic a d gen ralco ce pts

For the purp se of this International Stan ard the terms an definition l sted in in ex of

defined terms an the folowin a ply

NOT Th d finitio s giv n in this sta d rd are g n raly in a re me t with th se in IECTR 6 7 8:2 0 a d ISO

Intern tio al v c b lary of b sic a d g n ral terms in metrolo y, e c pt th t some d finitio s h v b e ma e

more restricte An su h sp cial d finitio s sh uld b re ard das a plyin o ly to this sta d rd

An terms n t d fin d in this sta d rd h v th me nin s d fin d in th a o e p blc tio s or are as ume to b

in g n ral scie tific usa e

Throu hout this stan ard:

– if no material is sp cified, the term "AB ORB D DOS " or "dose" me n "AB ORB D DOS TO

WAT R (in water)" an the term "KERMA" me n "AIR KERMA (in air)";

– when the q antity "AIR KERMA (in air)" in u its "Gy" is u ed, the q antity "EXPOSURE" in

– the term “he v ion“ ad res es the ran e of n cl des from 2-He to 18-Ar in ac ordan e

with IAEA Tec nical Re ort 3 8 [2]

1)

3.1

RA IOTHER PY DOSIME ER

eq ipment, con istin of a MEASU IN AS EMBLY an one ore more C AMB R AS EMBLIE , for

the me s rement of AIR KERMA, AB ORB D DOS , or their cor esp n in rates or sp tial

distribution , in PHOTON, ELECTRON, proton an he v ion radiation as u ed in RA IOTHER PY

NOT A RA IOT ERA Y DOSIME ER ma in lu e th folowin c mp n nts:

– o e or more S A ILIT CH CK D VICE ;

IONIZING RA IATION detector con istin of a c amb r fi ed with air, in whic an electric field

in uf icient to prod ce gas multipl cation, is provided for the col ection at the electrodes of

c arges as ociated with the ion an the ELECTRONS prod ced in the me s rin volume of the

detector by IONIZIN R DIATION

NOT 1 For this sta d rd, th IONIZ TION CH MB R is c nsid re to c nsist of th me surin v lume, th

c le tin ele tro e, th g ard ele tro e (if a y), th o ter ele tro e (whic c nsists of th c amb r wal a d

p s ibly a c n u tin c atin ), th se p rts of th insulator a ja e t to th me surin v lume, th b id-u c p a d

rigid outer electrode mou ted on a s p ortin stem

NOT 1 Th me surin v lume is usu ly symmetric l a o t th a is of th stem a d th c amb r is inte d d to

SHEL C AMB R whose outer electrode ta es the form of a rigid c l n rical wal closed at one

en an mou ted at the other on the s p ortin stem

IONIZATION C AMB R con tru ted in s c a way as to alow the air in ide the me s rin volume

to commu icate fre ly with the atmosphere s c that cor ection to the RE PONS for c an es

in air den ity ne d to b made

3.1.1.1.4

S ALED C AMB R

IONIZATION C AMB R con tru ted in s c a way as to restrict the p thway b twe n the air

in ide the me s rin volume an the atmosphere s ficiently to en ure that the RE PONS of

the c amb r is in e en ent of c an es in ambient con ition over a p riod of time stated by

the MA UFA TU ER

3.1.1.1.5

UN U R ED IONIZATION C AMBER

IONIZATION C AMB R in whic the g ard con u tor in the ca le s r ou din the centre (sig al)

con u tor terminates in the ca le an do s not exten into the stem or b d of the CH MB R

AS EMBLY

3.1.1.1.6

PA TIAL Y GU RDED IONIZATION C AMBER

IONIZATION C AMB R in whic the g ard con u tor in the ca le s r ou din the centre (sig al)

con u tor exten s wel into the stem or b d of the CH MB R AS EMBLY but do s not enter the

air in the c amb r

3.1.1.1.7

GUA DED IONIZATION CH MB R

IONIZATION C AMB R in whic the g ard con u tor in the stem or b d of the CH MB R

AS EMBLY is contin ou with a g ard electrode that is in contact with the air in ide the

c amb r

3.1.2

MEASURIN AS EMBLY

device to me s re the c arge (or c r ent from the IONIZATION C AMB R an con ert it into a

form s ita le for displayin the values of dose or KERMA or their cor esp n in rates

value of a q antity derived from the re din of an in trument together with an s ale factors

in icated on the CONTROL PA EL of the in trument

NOT Th IN ICA E V LU ise uiv le t to th "u c re te o serv tio s" sh wn in Fig re A.1

value u ed in te d of the TR E V LUE when calbratin or determinin the p rforman e of an

in trument, sin e in practice the TR E V LUE is u known an u knowa le

NOT 1 Th C N E TION L TRU V LU wi usu ly b th v lu d termin d b th WO KING S A D RD with whic

th instrume t u d r test is b in c mp re

NOT 2 Th p s ible b u ds within whic th C N E TION L TRU V LU wi le are e uiv le t to th "v lu s of

ME S RA D d e to in omplete d finitio " sh wn in Fig re A.1

3.4.1

S A DA D

<metrolog > in trument whic defines, re resents ph sical y, maintain or re rod ces the u it

of me s rement of a q antity (or a multiple or s bmultiple of that u it in order to tran fer it to

other in truments by comp rison

3.4.1.1

NATION L S A D RD

<metrolog > S A D RD recog ized by an oficial national decision as the b sis for fixin the

values an U CERTAINTIE in that cou try of al other S A DA DS of the given q antity

b st estimate of the TR E V LUE of a q antity, b in derived from the IN ICAT D V LUE of an

in trument together with the a pl cation of al relevant COR ECTION FA TORS an the

UN ERTAINTY as ociated with the MEASU ED V LUE

NOT 1 I e it re rese ts th b u ds within whic th ER O OF ME S REME T is estimate to le

NOT 2 For th p rp se of this sta d rd th OV RAL U CERT IN Y ma b ta e as th E P N E U CERT IN Y

c r esp n in to a c nfid n ele el of 9 % (se An e A)

3.5.3

EXPA DED U CERTAINTY

q antity definin an interval a out the res lt of a me s rement that may b exp cted to

en omp s a large fraction of the distribution of values that could re sona ly b atributed to

3.6

CORRECTION FA TOR

dimen ionles multipler whic cor ects the INDIC T D V LUE of an in trument from its value

when o erated u der p rtic lar con ition to its value when o erated u der stated RE EREN E

an internal pro erty of an in trument that may afect the p rforman e of this in trument

NOT Se Ta le 5, Ta le 6a d Ta le 7 for e amples of IN TRUME T P RAME ERS

3.9

RE EREN E V LUE

p rtic lar value of an INFLUENCE QU NTITY or INS R MENT PA AME ER c osen for the purp ses

of referen e

NOT I e th v lu of a IN LU NCE QU N IT (or IN TRUME T P RAME ER) at whic th C R ECTION F CTO for

d p n e c o th t IN LU NCE QU N IT (or IN TRUME T P RAME ER) is u ity

value, values, or ran e of values of an INFLUEN E QU NTITY or INS R MENT PA AME ER, whic

are p rmited when car yin out calbration or tests on another INFLUEN E QUA TITY or

<MEASU IN AS EMBLY q otient of the IN IC T D V LUE divided by the input c arge or c r ent

<IONIZATION C AMB R q otient of the ionization c arge or c r ent divided by the

<display> smal est c an e of re din to whic a n merical value can b as ig ed without

further interp lation

< nalog e display> smal est fraction of a s ale interval that can b determined by an

o server u der sp cified con ition

<digital display> smal est sig ificant in rement of the re din

3.1 3

EQUILIBRATION TIME

time ta en for a re din to re c an remain within a sp cified deviation from its final ste d

value af er a s d en c an e in an INFLUEN E QU NTITY has b en a pled to the in trument

time ta en for a stated P RFORMA CE C A A T RIS IC to re c an remain within a sp cified

deviation from its final ste d value afer the MEASU ING AS EMBLY has b en switc ed on an

the p larizin voltage has b en a pl ed to the IONIZATION CH MB R

s d en c an e in the ne r zero re din of the MEASURIN AS EMBLY when the set in control

is c an ed from the "zero" con ition to the "me s re" con ition, with no sig al present

3.1 9

NON-LINEA ITY

deviation from l ne rity

NOT Qu ntifie as folows: o e c ra g th h lf ful re din M is ta e as a refere c ; th in ut sig al Q

re uire to pro u e this RE ERE CE SCALERE DING is me sure At a oth r re din m pro u e b a in ut sig al

q, th p rc nta e d viatio from ln arity is giv n b :

For a ME S RING A S MBLY set to th "d se" mo e, th in ut sig al is ele tric c arg ; for a ME S RING A S MBLY

set to th "d se rate" mo e, th in ut sig al is ele tric c re t

3.12

V RIATION

relative diff eren e, Δy/y, b twe n the values of a P RFORMA CE CH RA T RIS IC y, when one

INFLUEN E QU NTITY (or INS R MENT PA AME ER) as umes s c es ively two sp cified values,

the other INFLUEN E QU NTITIE (an INS RUMENT PA AME ERS) b in k pt con tant at the

S A D R T S V LUE (u les other values are sp cified)

3.13

LIMIT OF V RIATION

maximum p rmited V RIATION of a P RFORMA CE C A A T RIS IC

NOT If LIMIT OF V RIA ION are state as ±L %, th V RIA ION Δy , e pres e as a p rc nta e, sh l remain in

NOT 2 Th c n e t of E F CTIV RA GE ma , for e ample, also b a ple to re din s a d to relate q a tities

n t dire tly in ic te b th instrume t e.g in ut c re t

3.15

RAT D R N E OF US

RAT D R N E

ran e of values of an INFLUEN E QU NTITY or INS R MENT PA AME ER within whic the

in trument wi o erate within the LIMIT OF V RIATION

NOT Itslmits are th ma imum a d minimum RA E V LU S

electrical eq ipment havin an AP LIED PA T or tran fer in energ to or from the PATIENT or

detectin s c energ tran fer to or from the PATIENT an whic is:

a) provided with not more than one con ection to a p rtic lar SUP LY MAINS; an

b) inten ed by its MA UFA TU ER to b u ed:

1) in the diag osis, tre tment, or monitorin of a PATIENT; or

2) for comp n ation or al eviation of dise se, injury or disa i ty

< H MB R AS EMBLY with an as ociated MEASU IN AS EMBLY factor whic con erts the

INDIC T D V LUE, cor ected to stated RE EREN E CON ITIONS, to the CON ENTION L TRUE V LUE

at the p sition of the RE EREN E POINT of the IONIZATION C AMB R

<IONIZATION C AMB R cal brated on its own without a sp cified MEASU ING AS EMBLY factor

whic con erts the ionization c arge or c r ent, cor ected to RE EREN E CONDITIONS

, to the

CONVENTION L TR E V LUE at the p sition of the RE EREN E POINT OF THE C AMB R

NOT This is th re ipro al of RE PON E u d r RE ERE CE C N ITION

dosimeter whose p rforman e an sta i ty are s ficient for it to b u ed to me s re relative

dose distribution in con ection with a

SC N IN SYS EM

3.2

SC NNIN SYS EM

a p ratu to displace an IONIZATION CH MB R in order to me s re the sp tial dose or dose

rate distribution of a R DIATION B AM

test on a re resentative sample of the eq ipment with the o jective of determinin if the

eq ipment, as desig ed an man factured, can me t the req irements of this stan ard

Gy·h–1

is the s m of the initial kinetic energies of al the c arged

ionizin p rticles l b rated by u c arged ionizin p rticles in air of mas dm

Gy·h–1

q otient of dQ by dm where dQ is the a solute value of the total c arge of the ion of one sig

prod ced in air when al the ELECTRONS (negatron an p sitron ) l b rated by PHOTONS in air

of mas dm are completely sto p d in air

min–1

C·k–1

h–1

containin information for the

RE PONSIBLE OR A IZATION or OP RATOR, p rtic larly regardin

BASIC SAF TY an E S NTIAL P RFORMA CE

[IEC 6 6 1-1:2 0 , 3.4]

3.3

INS R CTIONSFOR US

those p rts of A COMPA YING DOC MENT givin the neces ary information for safe an pro er

natural or legal p rson with resp n ibi ty for the desig , man facture, p ck gin , or la el n

of ME EQUIPMENT, as embl n an ME SYS EM, or ada tin ME EQUIPMENT or an ME SYS EM,

regardles of whether these o eration are p rformed by that p rson or on that p rson's

∫∫

y z p(y,z) dy dz – µ

yµ

z

where p(y,z) is the joint PROBABILITY DENSITY FU CTION of two varia les y an z The

COV RIA CE cov(y,z) [also denoted by v(y,z)] may b estimated by s(y

iz

i) o tained from n

1

z

n1

zany

n

1

y

ii

i

i

NOT Th estimate C V RIA CE of th two me ns y a d z is giv n b s(y,z) s(y ,z ) n

ii

[ISO/IEC GUIDE 9 -3:2 0 , definition C.3.4]

3.3

CO BINEDS A DA D UN ERTAINTY

S A D R UN ERTAINTY of the res lt of a me s rement when that res lt is o tained from the

values of a n mb r of other q antities, eq al to the p sitive s uare ro t of a s m of terms, the

terms b in the V RIA CE or COV RIA CE of these other q antities weig ted ac ordin to

how the me s rement res lt varies with c an es in these q antities

[ISO/IEC GUIDE 9 -3:2 0 , 2.3.4]

3.4

COVER GE FA TOR

n merical factor u ed as a multipl er of the COMBINED S A D RD U CERTAINTY in order to

o tain an EXPA DED U CERTAINTY

PROBABILITY DENSITY FUN TION

f(x)

non-negative fu ction whic when integrated from -∞ to x gives the DIS RIBUTION FU CTION

evaluated at x of a CONTIN OUS DIS RIBUTION

NOT f(x)dx is th "pro a i ty eleme t" , f(x)dx = P

r(x<X<x+ x)

NOT 1 A RA DO V RIA LE th t ma ta e o ly isolate v lu s is said to b "discrete" A RA DO V RIA LE th t

ma ta e o a y v lu within a finite or infiniteinterv l is said to b "c ntin o s"

NOT 2 Th PR B BILIT OF A E E T A is d n te , b P

r(A)or P(A)

NOT Wh re s a ty e A S A D RD U CERT IN Y is o tain d b ta in th sq are ro t of th statistic ly

e alu te V RIA CE, it is ofe more c n e ie t to e alu te a n n-statistic l e uiv le t S A D RD D VIA ION first

a d th n to o tain th e uiv le t V RIA CE b sq arin th S A D RD D VIA ION

MEASUREMENT U CERTAINTY

UN ERTAINTY OF MEASUREMENT

4.1 BASIC SAF TY and E S NTIAL P RFORMAN E

Durin the IMMU ITY tests for ELECTROMA NE IC COMPATIBILITY (se 6.2.6) BASIC SAF TY an

E S NTIAL P RFORMA CE s al b g arante d

ES ENTIAL P RFORMA CE is g arante d if the lmits l sted in Ta le 7 are not ex e ded d rin

the IMMU ITY tests ES ENTIAL P RFORMA CE is also en ured if d rin the IMMU ITY tests the

re din of the MEASURIN AS EMBLY, or the data output, are cle rly c aracterized as in al d,

e.g by me n of a warnin mes age or in case of a latc -up

NOT Ex mples of warnin mes a es for in ald re din s are hig v lta e eror or o erlo d mes a es

4.2 Performance req irements

For a complete dosimeter to comply with this stan ard, e c of its comp nents s al comply

with the in ivid al req irements in the a pro riate clau es or s bclau es in ad ition to the

general req irements The MA UFA TURER s al state whether a TYP T S or a ROUTINE T S

was u ed for a p rtic lar p rameter

For eq ipment whic do s not fulfi al the req irements of this stan ard, information s al b

provided a out those clau es with whic it do s not comply

The p rforman e req irements to b met

– for the CH MB R AS EMBLY are given in Clau e 5;

– for the MEASU IN AS EMBLY are given in Clau e 6;

– for the S ABILITY C EC DEVICE are given in Clau e 7

For those INFLUEN E QUA TITIE that can b control ed,

a) the RE ERENCE V LUE s al b the value c stomari y u ed d rin the radiation cal bration

4.4 General test conditions and method

4.4.1 STA DA D T S CONDITIONS

The S A DA D T S CON ITIONS, as defined by the S A D R T S V LUE l sted in Ta le 1 an

Ta le 2, s al b met d rin the test proced re, ex e t

a) for the INFLUEN E QU NTITY u der in estigation;

b) where local con ition of temp rature an relative h midity are outside the S A D R T S

CON ITIONS In this case, the tester s al ju tify the val dity of the test res lts

4.4.2 Test of components

The folowin req irements a ply:

a) The prefer ed proced re for verifyin that the p rforman e req irements are met is to test

the comp nents se arately, in whic case:

– tests on the IONIZATION C AMB R s al b p rformed u in a "hig -precision"

MEASU ING AS EMBLY;

– tests on the MEASU IN AS EMBLY s al b car ied out u in a "hig -precision" c r ent

or c arge source as req ired, con ected to the input

In this context, "hig precision" me n that the P RFORMA CE CH R CT RIS ICS of the test

eq ipment s al b s c that they p rturb the value of the p rtic lar P RFORMA CE

C A A T RIS IC b in me s red by les than one-q arter of the LIMIT OF V RIATION

b) An tests may b car ied out u in the complete dosimeter, in p rtic lar this is the

prefer ed method for in estigatin the ef ects of radio- req en y electromag etic field

an ELECTROS ATIC DISC A GE on a ca le-con ected IONIZATION C AMB R s p l ed with a

MEASU IN AS EMBLY as a s stem Some tests p rformed with the whole s stem can ot

give information as to whether the origin of a V RIATION l es in the CH MB R AS EMBLY or in

the MEASU IN AS EMBLY (e.g LEA A E C R ENT an Z RO D IF ) If a complete s stem is

tested an the relevant INFLUEN E QU NTITY af ects b th p rts, the q adratic s m of the

se arate LIMIT OF V RIATION may b ta en as an overal l mit of V RIATION

c) When a C AMB R AS EMBLY an a MEASURIN AS EMBLY are tested se arately, but s p l ed

as a s stem, the two comp nents s al b con ected an the combined eq ipment s al

have a me s red overal RE PONS within ± ,5 % of the overal RE PONS calc lated from

the RE PONS S of the se arate as embl es

4.4.3 RAT D or E F CTIVE R NGE of dose (or KERMA) rates

NOT 1 In th c se of d se (or K R A) me sureme ts, th d se rate (or K R A rate) c n b re ard d as a

IN LU NCE QU N IT In thisc se, th term RA E RA GE of d se rate (or K R A rate) is a plc ble

NOT 2 In th c se of d se rate (or K R A rate) me sureme ts, this q a tity is a IN ICA E V LU In this c se,

th term E F CTIV RA GE of d se rate (or K R Arate) is use

The fol owin req irements a ply:

a) When a C AMB R AS EMBLY is tested se arately, the R T D or E F CTIVE R N E of dose (or

KERMA) rates s al fulfi the a pro riate req irements in Clau e 5

b) When a MEASURIN AS EMBLY is tested se arately, the eq ivalent p rameter is determined

as the R T D or E F CTIVE R N E of input c r ents an this s al fulfi the a pro riate

req irements in Clau e 6

c) When however, by c oice or neces ity, the c amb r an MEASU IN AS EMBLIE are

tested together, the RAT D or E F CTIVE RA GE of dose (or KERMA) rates s al fulfi the

relevant req irements in b th Clau es 5 an 6

4.4.4 UN ERTAINTY OF MEASUREMENT

When me s rements of V RIATION are made to verify that eq ipment compl es with sp cified

LIMIT OF V RIATION, the OVER L U CERTAINTY of these me s rements of V RIATION s ould b

negl gible comp red with the sp cified LIMIT OF V RIATION

If this is not p s ible, the OVER L UN ERTAINTY of the me s rement of V RIATION s al b

ta en into ac ou t in the evaluation of the eq ipment u der test by ad in the OVER L

UN ERTAINTY to the LIMIT OF V RIATION al owed

If the OVER L U CERTAINTY ex e d one- if h of the LIMIT OF V RIATION for an P RFORMA CE

CH R CT RIS IC, then this s al b stated

NOT For th p rp se of this S A D RD th OV RAL U CERT IN Y ma b ta e as th E P N E U CERT IN Y

c r esp n in to a c nfid n ele el of 9 % (se An e A)

4.4.5 Adjustments during test

Compl an e tests s al b p rformed with the in trument re d for u e (in lu in A CE SORIE

if an ), af er the S ABILIZATION TIME an af er ma in prelminary adju tments as neces ary

Durin tests, adju tments may b re e ted at intervals as lon as s c an adju tment do s

not interfere with the ef ect to b verified For example, the zero set in may b adju ted

whenever neces ary ex e t d rin tests for me s rin Z RO D IF an Z RO SHIF

4.4.6 Test conditions partic lar to C AMBER AS EMBLIE

When testin compl an e with the p rforman e req irements in Clau e 5 (ex e t for those in

5.2.1, 5.2.3 an 5.2.10) the p larizin voltage may b a pl ed to the c amb r for 1 h b fore

ta in a me s rement

4.4.7 Test conditions partic lar to MEASU IN AS EMBLIE

The folowin req irements a ply:

a) Tests on the efect of electromag etic field an ELECTROS ATIC DISC A GE s al b

made with the typ of C AMB R AS EMBLY normaly s p l ed con ected to the input of the

MEASU ING AS EMBLY

b) Tests on Z RO D IF an Z RO SHIF s al b made with the input of the MEASU ING

AS EMBLY dis on ected an s ielded with a con u tin grou ded (e rthed) s re n, for

example a metal d st ca

c) Unles otherwise sp cified in the detai ed in tru tion for testin , al other tests s al b

made with a source of either electric c arge or c r ent con ected to the input of the

MEASU ING AS EMBLY as fol ows:

1) me s rements on dosimeters s al b made with a c arge source con ected to the

input This circ it s al b a le to inject varia le ac urately known dis rete amou ts of

The output of this c arge source s al have b en calbrated b fore u e an b

trace ble to a N TIONAL S A DA D (either directly to a c arge S A DA D or in irectly to

voltage an ca acitan e S A DA DS or to voltage, resistan e an time S A D RDS);

2) me s rements on dose rate meters s al b made with a c r ent source con ected to

the input This circ it s al b a le to inject varia le ac urately known con tant

The output of this c r ent source s al have b en cal brated b fore u e an b

trace ble to a NATION L S A D R

(either directly to a c r ent

D or in irectly to

voltage an resistan e S A D R S)

NOT 1 If tests are b in ma e o a d simeter/d se rate meter with sig al/g ard in ut termin ls whic

are at th p larizin v lta e awa from gro n (e rth) th n th o tp t circ it of th c arg or c re t

so rc wi n e to b "flo tin ";

NOT 2 Th o tp t circ it of th c arg so rc n e s to h v a suficie tly hig imp d n e so as n t to

c use a me sura le in re se in Z R DRIF or c arg le k g ;

NOT 3 Th o tp t circ it of th c re t so rc sh uld n t influ n e th me sure c re t Some

ele trometers h v F T prote tin in ut resistors whic ma influ n e th c re t from n n-io izatio

c amb r ty ec re t so rc s

4.4.8 Test conditions partic lar to S ABILITY CHEC DEVICE

When testin compl an e with the p rforman e req irements in Clau e 7, the referen e

MEASU ING AS EMBLY u ed s al b either that typ inten ed to b c eck d by the S ABILITY

CHEC DEVICE or another in trument of eq ivalent or s p rior p rforman e

Ad itional y, in the case of an overal S ABILITY CHECK DEVICE the referen e CH MB R

AS EMBLY u ed s al b one of a typ inten ed to b c eck d by the S ABILITY CHEC DEVICE

Ta le 5, Ta le 6 an Ta le 7 s mmarize the R T D R N E of INFLUEN E QU NTITIE an

INS R MENT PA AME ERS an the sp cified LIMIT OF V RIATION for FIELD-CLAS DOSIME ERS of

Ta le 1 – RE EREN E CON ITIONS and S A DA D T S CONDITIONS – C AMBER AS EMBLY

IN LU NCE QU N IT or

IN TRUME T P RAME ER

RE ERE CE V LU S ST N ARD T S V LU S

Al IONIZ TION CH MB RS

– X- a d γ-ra iatio in fre air

Ta le 2 – RE EREN E CONDITIONS and S A D R T S CON ITIONS – MEASURIN AS EMBLY

ST BILIZ TIONTIME 1 h afer switc -o > 15 min afer switc -o

5.2.1

L n -erm sta i ty

±1,0 % b

5.2.2.1

Ac umulate d se sta i ty

±1,0 % c

Re e ta i ty

± ,5 % b

6.2.3

L n -erm sta i ty

±1,0 % c

6.2.4

ZER DRIF – d simeter

±1,0 % d

6.3.1

ZER DRIF – d se rate meter

±1,0 % e

6.4.2

NON-LIN ARIT – d simeter

± ,5 % g

6.3.3

NON-LIN ARIT – d se rate meter

±1,0 % g

Ta le 5 – LIMIT OF V RIATION of P RFORMA CE C A A T RIS ICS for ef ects of INFLUENCE

≥ 1 x 101

Ω –

Perc nta e c a g of RE PON E c use b re ersal of p larity u d r sp cifie IR A IA ION c n itio s,

me sure afer sta i zatio of RE PON E at e c p larity

e

Perc nta e c a g of RE PON E for AIR K R A o er th RA E RA GE of RA IA ION QU LIT

f

Th MINIMUM RA E RA GE of X-RA T B VOLT GE is e pres e in kV Th MINIMUM RA E RA GE of me n

e erg is e pres e in k V or MeV In e c c se, th me n e erg v lu giv n is th t of a mo o-e erg tic

P OTON of th same H L rath r th n th me n e erg d riv d from th ra iatio sp ctrum

g

Perc nta e difere c b twe n th AIR K R A RE PON E at th refere c RA IA ION QU LIT a d th AIR

K R A RE PON E atoth r sp cifie RA IA IONQU LITIE within th RA E RA GE

Ta le 6 – LIMIT OF V RIATION of P RFORMA CE C A A T RIS ICS for ef ects of INFLUENCE

Ta le 7 – LIMIT OF V RIATION of P RFORMA CE C A A T RIS ICS for ef ects of INFLUENCE

A R DIOTHER PY DOSIME ER s al b clas ified as field-clas if the p rforman e req irements

l sted in Ta les 1 to 3 are met

4.6.2 RE EREN E-CLAS DOSIME ER

A R DIOTHER PY DOSIME ER may b clas ified as referen e-clas if in ad ition to the

p rforman e req irements lsted in Ta les 1 to 3 b in met, the more strin ent req irements

of not more than half the l mits lsted a ply for al the fol owin P RFORMA CE

NOT Wh re two p rforma c le els are sp cifie for th efe ts of IN LU NCE QU N ITIE (or IN TRUME T

P RAME ERS), in p rases su h as "LIMIT OF V RIA ION sh l b ±x % (±y %)", th first fig re, ±x %, refers to a

FIELD-CLA S DOSIME ER a d th se o d fig re in p re th ses, (±y %), refers to a RE ERE CE-CLA S DOSIME ER

A referen e-clas c amb r s al not b a S ALED C AMB R

4.6.3 SC N IN -CLAS DOSIME ER

A R DIOTHER PY DOSIME ER may b clas ified as SC N IN -CLAS if the p rforman e

req irements for FIELD-CLAS l sted in Ta les 1 to 3 are met with the fol owin modification :

The general p rforman e req irements that a ply to the air- i ed IONIZATION C AMB RS

normal y u ed for RA IOTHER PY dosimetry are given in 5.2

The p rtic lar p rforman e req irements for

– thimble or S HERIC L C AMB RS are given in 5.3;

– PA AL EL-PLAT C AMB RS are given in 5.4;

– VENT D C AMB RS are given in 5.5;

– S ALED C AMB RS are given in 5.6

NOT This sta d rd d es n t c v r th se oth r ty es of c amb rs (e.g e tra olatio , fre -air, c n e ser) whic

are o ly v ry rarely use for RA IOT ERA Y d simetry For th se ty es of c amb rs, it is re omme d d th t th

MA U ACT RER sh uld state th RA E RA GE of RA IA ION QU LIT a d d se rate, th RA E RA GE of IN LU NCE

The CH MB R AS EMBLY LEA A E C R ENT without IRR DIATION, but with the maximum R T D

p larizin voltage a pl ed to the C AMB R AS EMBLY, s al not ex e d ± ,5 % of the ionization

c r ent prod ced by the minimum ef ective dose rate

NOT If a ra g of p larizin v lta es is state to b suita le for use with th c amb r, th CH MB R A S MBLY

LE K GE CUR E T ma b state for v rio s lower p larizin p te tials

Compla ce wih this p erforma ce re u ireme t sh l b e ch ck d b y caryin ou t th te st

de scrib ed in a) to c)

a) App ly th ma imu m R AT D p olarizin v la e to th C HAMB ER AS S EMB LYa d me su re th

C HAMB ER ASS EMB LY LEAKAGE C UR R ENT (wih ut IR R ADIATION) 15 min (or les ), 1 h a d 6 h

later

b ) Iradiate th IONIZATION C HAMB ER u nde r R EF R ENC E C OND ITIONS a d dete rmin th lne ar

re lato ship b etwe n io izato curre t a d dose rate

c) Use this relato ship to e p re ss th C HAMB ER ASSEMBLY LEAKAG E C UR R ENT as a p rce tage

of th io izato curre t produce db y th minimum efectv dose rate

5.2.2 Sta i ity

5.2.2.1 Long- erm sta i ty

The LIMIT OF V RIATION of RE PONS of an IONIZATION C AMB R when ir adiated in a

re rod cible field of co alt 6 or ca sium-13 GAMMA RA IATION s al b not gre ter than

– ±1,0 % over one ye r, for a field-clas C AMB R AS EMBLY;

– ± ,5 % over one ye r, for a referen e-clas C AMB R AS EMBLY;

– ±1,0 % over one month, for a s an in -clas C AMB R AS EMBLY

NOT 1 Ov r a n mb r of y ars th RE PON E of a IONIZ TION CH MB R c n c a g owin to dime sio al

c a g s a d to c a g s in th n ture of th surfa es sur o n in th me surin v lume; th later efe t ma also

c use th e erg d p n e c of th IONIZ TION CH MB R to c a g with time

Compla ce wih this p e rforma ce re uireme t sh l b e ch ck d b y retainin a re prese tatv

ch mb er, stored u nder S TAND AR D T S TC OND ITIONS, a d in e stgatn is lo g-term stab il y, b y

ma in me su reme nts at interv ls of n t more th n o e mo th under R EF R ENC E C OND ITIONS,

o er a p eriod ofn t le ss th n

– six m onths in th case of a field-clas ch mb e r, or

– o e y arin th case of a refere ce-clas ch mb e r, or

– four mo ths in th case of a s a ning-clas ch mb e r

NOT 2 If d rin this test p rio a tre d in RE PON E is in ic te for a y RA IA ION QU LIT in th RA E RA GE

of gre ter th n ±1,0 %p r y ar, th

MA U ACT

RER sh uldinform th

RE PON IBLE O GA IZ TIO

– the LIMIT OF V RIATION of RE PONS of the IONIZATION C AMB R d e to the ef ect of this

ac umulated dose s al b not gre ter than ±1,0 %;

– the CH MB R AS EMBLY s al sti me t the p rforman e req irements for p st ir adiation

le k ge (se 5.2.4), LEA A E C R ENT without IR A IATION (se 5.2.1) an S R Y

R DIATION ef ect (se 5.2.8)

Comp lia ce wih this p rforma ce re quireme t sh l b e che ck d b y:

– me surin th R ES PONSE of th IONIZATION C HAMB ER in a rep roducib le R AD IATION FIELD, at

b oth th minimu m a d ma imum RAT D R AD IATION QUALITIE , b efore a d afte r delv rin

th sp e cifie d ac u mulated dose to th C HAMB ER AS S EMB LY;

– re p eatn th te sts for p ost iradiato le k ge, LEAKAGE C UR R ENT wih ut IR R AD IATION a d

S TR AY R AD IATION efe ct afte r delv rin th sp ecified ac umu lated dose to th C HAMB ER

AS SEMB LY

5.2.3 STABILIZATION TIME

Durin a p riod of b twe n 15 min an 2 h af er a plyin the p larizin voltage the LIMIT OF

V RIATION of RE PONS s al b not gre ter than ± ,5 % of the RE PONS me s red 1 h afer

a plyin the p larizin voltage, for the case where the IONIZATION CH MB R is contin ou ly

ir adiated from the moment the p larizin voltage is a pl ed

Compla ce wih this p erforma ce re qu ireme t sh l b e che ck d b y caryin ou t th te st

de scrib ed in a) a db )

a) App ly th p olarizin v lage a d iradiate th IONIZATIO C HAMB ER b y placin i in a cob al

6 orca sium-137 G AMMA R AD IATION b eam, set to th refe re nce field size at th refere ce

dose rate

b ) Whist k e pin th IONIZATION C HAMB ER co tnuously iradiated, me sure th R ES PONSE

ap p ro imately 15 min, 1 h a d 2 h later

5.2.4 Post ir adiation le k ge

Within 5 s afer the en of a 10 min

IR A IATION, the tran ient LEA A E C R ENT s al have

decre sed to ±1,0 % (± ,5 %) of the ionization c r ent prod ced in the me s rin volume

NOT This efe t arises in th t p rt of th stem insulator or c ble ira iate in th RA IA ION B AM, a d is a

c r e t th t is pro u e b th ra iatio , c ntin es afer th ra iatio h s c ase a d c mmo ly d cre ses

e p n ntialy with time

Compla ce wih this p erforma ce re u ireme t sh l b e ch ck d b y caryin ou t th te st

de scrib ed in a) to f)

a) Sele ct a MEAS UR IN AS SEMB LY wih a ou tp u t signal pro orto al to th cu rre t me su red

Co ne ct this ou tp u t to a suitab le re cordin de ice (e.g a ch rt recorder) Th comb in d

system sh l b e ab le to me sure a d re cord curre t from th ch mb erwih a tme co sta t

of 0 ,5 s or les

b ) Posi o th IO IZATION C HAMB ER in a cob al 6 GAMMA R AD IATION b eam set to th

ma im u m RAT D field size Th ch mb e r REF R ENC E POINT sh u ld b e at th ce tre of th

field a d at a dista ce from th source at which th dose rate is th R EF R ENC E VALUE

c) Iradiate th IONIZATION C HAMB ER a d record th io izato curre t p roduced

d) After 10 min, sto th IRR AD IATION a d record th LEAKAG E C UR R ENT for a pe riod of 10 s

e) Re d th v lue of th tra sie nt LEAKAGE C UR R ENT re corded 5 s afte r th IR R ADIATION h s

ceased a d calcu late is magniude as a p e rce ntage of th me n curre nt recorded durin

th IR R AD IATION

f) Rep eat ste p s b ) to e ) inclusiv , b u t for a dose rate n ar th minimum of th R AT D R AN E

5.2.5 RAT D or E F CTIVE R N E of dose rate (continuou radiation)

5.2.5.1 Minimum R T D or ef ective dose rate

The minimum RAT D or efective dose rate is the lowest dose rate at whic the p rforman e

req irement on the C AMB R AS EMBLY LEA A E C R ENT is met (se 5.2.1)

5.2.5.2 Maximum RAT D or ef ective dose rate

The maximum R T D or ef ective dose rate is the hig est dose rate at whic the p rforman e

req irement on the c amb r ion col ection ef icien y is met

NOT At hig d se rates,th RE PON E ma v ry d e to th folowin efe ts:

a) io re ombin tio within th me surin v lume whic c uses th io c le tio eficie c to b les th n

10 %;

b) th b h vio r of LE K GE CUR E T a ros th t p rt of th insulator th t is ira iate in th RA IA ION B AM

For th p rp se of this re uireme t, it ma b as ume th t if th CH MB R A S MBLY c mples with th

re uireme ts of stem le k g in 5.2.2.2 a d for p st ira iatio le k g in 5.2.4, th influ n e of LE K GE

CUR E T a ros th insulator o d se rated p n e c wi b insig ific nt

The ion col ection ef icien y s al b not les than 9 % when the IONIZATION C AMB R is

ir adiated at the maximum R T

D or ef ective contin ou dose rate with the recommen ed

p larizin voltage a pl ed to the CH MB R AS EMBLY This req irement s al b met for b th

p larities of p larizin voltage

If a ran e of p larizin voltages is stated to b s ita le for u e with the c amb r, the ion

colection ef icien y at the maximum R T D or efective dose rate s al b stated for variou

p larizin voltages

Comp lia ce wih this p erforma ce re uirem ent sh l b e ch cke d b y caryin ou t th test

des rib ed in a) to g), se arate ly for e ch p lariy of p olarizin v lage

a) Ensure th t th C HAMB ER AS SEMB LY h s b e en tested for stem le k ge (se 5.2.2.2) a d

p st iradiato le k ge (se 5.2.4) a d use th re sults of the se tests wh re ne ces ary to

isolate th v lue of th io cole cto eficie cy

b ) Whist ke epin th co tnuous dose rate

cD



co sta t at a co v nie nt high v lu e, me sure

th io izato curre nt at fiv or more dife re t p larizin v lages b etwe n 2 % a d

100 % ofth recomme ded p olarizin v la e

c) Plot or calculate b y re re ssio a alysis 1 I

V,c against 1 V

re gres io a alysis, as th v lue o th 1 I

V,c– xis wh n th ln is e trap olate d to

dose rate

cm,D

cR,c

c

m,

II

ID

ch mb eris iradiated at co tnuous dose rate

cD



g) Ifa straig t ln do s n t resu lt, calcu late

cm,D

1/

1/

−

=

ba

ba

ba

−

=

ab

ba

ba

d

whe re a rep rese ts th radius ofth oute r ele ctrode a d b th radius of th in er o e in

mi imeters

5.2.6 Maximum RAT D dose p r pulse (pulsed radiation)

The maximum R T D dose p r pulse is the largest dose p r pulse for whic the p rforman e

req irement on the c amb r ion col ection ef icien y is met

The ion col ection ef icien y s al b not les than 9 % when the IONIZATION C AMB R is

ir adiated at the maximum RAT D dose p r pulse (swe t b am ex lu ed) with the

recommen ed p larizin voltage a pled to the C AMB R AS EMBLY This req irement s al b

met for b th p larities of p larizin voltage

If a ran e of p larizin voltages is stated to b s ita le for u e with the c amb r, the ion

col ection eficien y at the maximum

R T D dose p r pulse s al b stated for variou

p larizin voltages