YC Phong Thu Nghiem VILAS

VN PHNG CNG NHN CHT LNG Bureau of Accreditation (BoA)

YU CU B SUNG CNG NHN CC PHNG TH NGHIM LNH VC IN - IN T Supplementary requirement for accreditation in the field of electrical electronicM s/Code: AGL 07 Ln ban hnh/Issue number: 03.10 Ngy ban hnh/ Issue date: 07/2010

Yu cu b sung cng nhn phng th nghim in in t Supplementary requirements for accreditation in the field of Electrical - Electronic

Ni dung Phn 1 1.1 1.2 1.3 1.4 Phn 2 4. 4.13 5. 5.2 5.3 5.4 5.5 5.6 5.7 5.8 5.9 5.10 Phn 3 Gii thiu Mc ch Phm vi p dng Chun mc cng nhn Cu trc Cc yu cu b sung Yu cu qun l Kim sot h s Yu cu k thut Nhn S Tin nghi v iu kin mi trng c lng khng m bo o Thit b Lin kt chun Ly mu Qun l mu th nghim m bo kt qu th nghim v hiu chun Bo co kt qu Thi hn hiu chun thit b

Trang 2 2 2 2 3 4 4 4 5 5 6 8 9 10 11 11 11 12 14

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Ln ban hnh: 3.10

Trang: 1/ 16


PHN 1 GII THIU1.1 Mc chTiu chun ISO/IEC 17025: 2005 "Yu cu chung v nng lc ca phng th nghim v hiu chun" l cc yu cu p dng cho tt c cc lnh vc th nghim v hiu chun bi vy cn phi c din gii b sung cho tng lnh vc hiu chun hoc th nghim c th. Ti liu ny a ra cc yu cu chi tit v c th hn i vi cc phng th nghim thuc lnh vc in- in t; lm chun mc cho cc phng th nghim (PTN) in - in t p dng v l chun mc cng nhn ca Vn phng Cng nhn Cht lng (BoA).

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Phm Vi p dng

Mt phng th nghim lnh vc in in t mong mun c cng nhn cn tun th cc qui nh trong ti liu ny, cc qui nh ca tiu chun ISO/IEC 17025, cc yu cu, qui nh lin quan ca BoA v cc yu cu php qui. Cc yu cu cng nhn cho cc PTN in - in t khng ph thuc vo qui m ca PTN, s lng cc php th m PTN thc hin hoc s lng nhn vin. Vic ra cc yu cu cng nhc cho tt c cc kha cnh hot ng ca PTN l khng th thc hin c. Khi nh gi cn linh hot c th xem xt tng hon cnh c th ca PTN.

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Chun mc cng nhnChun mc cng nhn phng th nghim lnh vc in in t bao gm: ISO/IEC 17025: 2005 - "Yu cu chung v nng lc ca cc phng th nghim v hiu chun". Yu cu b sung cng nhn cho phng th nghim lnh vc in in t. Cc chnh sch ca BoA lin quan cng nhn phng th nghim Cc vn bn php qui lin quan n hot ng th nghim trong lnh vc in in t. Th tc cng nhn phng th nghim theo ti liu APL 01

Cc ti liu k thut lin quan ti cc lnh vc k thut c th c vin dn trong ti liu nhm a ra cc hng dn gip cc PTN in-in t khng phi l cc yu cu cng nhn tr khi chng c nu c th trong ti liu ny. Cc yu cu cng nhn ca BoA phi lun sn c cho cc PTN c cng nhn v cc PTN gi n ngh cng nhn.

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Ln ban hnh: 3.10

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1.4

Cu trcTi liu ny c 3 phn chnh: Phn 1: Gii thiu Phn 2: Cc yu cu b sung cng nhn cho phng th nghim thuc lnh vc in in t Phn 3: Chu k hiu chun thit b

Cc yu cu trong phn 2 ca ti liu ny c trnh by theo th t ca cc yu cu trong tiu chun ISO/IEC 17025. C th c mt s yu cu trong tiu chun ISO/IEC 17025 s cha c yu cu b sung. Cc ni dung c k hiu iu mc trong du ngoc ( ) l yu cu bt buc cn cc ni dung c in ch nghing l cc hng dn, gii thch thm lm r ngha ca cc yu cu.

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Ln ban hnh: 3.10

Trang: 3/ 16


PHN 2 CC YU CU B SUNG4.4.13

Yu cu qun lKim sot h s

4.13.1 Yu cu chung (1) (2) Tt c cc h s phi xc nh r ngi chu trch nhim qun l. Thi gian lu gi h s ti thiu l 3 nm tr khi c tha thun vi khch hng hoc quy nh ca php lut. i vi h s hiu chun, thi gian lu gi phi khng ngn hn khong thi gian ln nht hiu chun li ca thit b hoc t nht l 3 nm nu thi gian hiu chun ca thit b ngn hn 3 nm.

4.13.2 H s k thut (1) H thng h s phi bao gm bn sao ca tt c cc bo co th nghim v cc chng ch cng nhn (nu c). H s bao gm: M nhn dng ca mu th; Ti liu th nghim, v ngy tin hnh th nghim; Phng php th c th; Thit b th, cc iu kin mi trng nh hng ng k ti khng m bo o ca kt qu. S liu quan trc gc ca php th v km vi vic tnh ton kt qu (nu c) Nhn vin thc hin th nghim. Xc nhn vic kim tra vic tnh ton v truyn d liu Cc thng tin khc c qui nh trong phng php th, trong hp ng hoc cc iu l lin quan do php lut quy nh.

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Ln ban hnh: 3.10

Trang: 4/ 16


5.5.2 (1)

Yu cu k thutNhn S Ngi chu trch nhim nh gi s ph hp ca sn phm theo yu cu k thut ca sn phm c bit yu cu an ton in cn c trnh i hc k thut in/in t hoc tng ng v c hiu bit chuyn su v mi lin quan gia mi him nguy v cc yu cu bo v tng ng, v d him nguy v in git, chy, bng, hoc cc kha cnh khc theo cc yu cu th lin quan. Ngi chu trch nhim nh gi s ph hp ca sn phm vin thng cn c trnh i hc chuyn ngnh V tuyn in/in t vin thng hoc tng ng v c hiu bit chuyn su v mi lin quan gia him nguy v an ton in vi yu cu bo v tng ng, v d nh him nguy lin quan n cc chi tit/b phn c in p thp trong cc thit b vin thng u cui (TTE), mi him nguy c th c i vi mng in thoi cng cng (PSTN) do c s dng cc thit b in p thp Nhn vin thc hin th in hnh an ton in, th TTE nu thc hin ti c s sn xut th phi c lp v khng chu bt k p lc no c th lm nh hng n s ng n ca kt qu th. Nhn vin ny cng cn c hiu bit tt v thit k v cu trc ca thit b m bo an ton cho sn phm, mng v ngi s dng.

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Nhn vin th nghim ti hin trng (1) Nhn vin tin hnh cng vic th ti trm lu ng hoc ti hin trng phi c o to thc hin cng vic ti trm lu ng hoc hin trng v phi hiu r c kt qu o ng n v tin cy khi th ti hin trng hoc trn trm lu ng th phi cn trng hn rt nhiu so vi vic tin hnh th bnh thng ti phng th nghim. Khi cn thit, PTN phi quy nh thm cc th tc bng vn bn th ti trm lu ng hay ti hin trng. Mi th nghim tin hnh ti hin trng phi chu s kim sot k thut ca ngi c thm quyn v mt k thut. Trong trng hp ngi c thm quyn v mt k thut khng thng xuyn c mt ti hin trng khi cc nhn vin tin hnh o/th th ngi c thm quyn ny phi tin hnh cc nh gi k thut v cc hot ng th nghim m bo s tin cy i vi nhn vin c giao nhim v. Khi cc nhn vin th nghim xa c s chnh, th t nht mt trong s cc nhn vin ny phi c ph duyt l ngi c thm quyn v mt k thut quyt nh cho php vic th c tin hnh. Khi cn thit, Vn phng Cng nhn Cht lng s tin hnh nh gi thng qua vic quan st cc php th c thc hin ti cc trm lu ng hoc ngoi hin trng.Ln ban hnh: 3.10 Trang: 5/ 16

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AGL 07


5.3 5.3.1 (1)

Tin nghi v iu kin mi trng Yu cu chung a im th phi m bo yu cu v nh sng. Khng gian th khng b nh hng bi bi, khi cng nh rung ng v nhiu. Phi c bin php kim sot thch hp v nhit , m v mc nh hng ca cc yu t mi trng ti chnh xc ca php o/th. PTN phi xc nh cc gii hn cho php i vi iu kin mi trng khi tin hnh th. Cc iu kin t ra phi ph hp theo mc chnh xc c quy nh cho php th. Cc iu kin mi trng phi c kim sot trong tng khong thi gian thch hp v cng vic th nghim phi dng li khi cc iu kin mi trng nm ngoi gii hn cho php. PTN tin hnh th in hnh cho thit k mi ca khch hng phi kim sot khu vc th m bo tnh bo mt cho khch hng, c bit nu a im th nghim nm chung trong khu vc sn xut v thc hin php th cho sn phm ca khch hng khc.

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5.3.2 Cc quy nh c th a im th (1) Kch thc ca phng th phi rng tin hnh th nghim v t thit b. Cn c khng gian cho nhn vin k c nhn vin gim st khi tin hnh php th c th. Phi c k hiu, bin bo ch r ng thot him khi tin hnh cc php th c kh nng gy nguy him i vi khu vc xung quanh. Tng, sn v trn ca PTN c thit k sao cho gim n mc ti a tc ng ca nhiu bn ngoi, cc nh hng xu ca rung v sng in t (nu c) Nu c ngun nhiu v trng in t th phi c bo v thch hp. Cc ng dy cp dn in, c bit ng dy cp cung cp cho khu vc khc nn c i trong ng thp v khng nn tip t ti PTN. Cc ng ng nc trong tng, trn sn nh hay trn trn c th l ngun pht tn trng, nu cn thit cc ng ng ny phi c ni t. (4) PTN khi s dng mch hoc thit b c tr khng cao phi c bo v tnh in. Khi th thit b c in p cao, phi c tin hnh trong phng hoc ti khu vc c bo v nhm m bo s an ton cn thit (v d nh thm cao su, kha lin ng).Ln ban hnh: 3.10 Trang: 6/ 16

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AGL 07


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Khi th vt liu nhit cao, phi c tin hnh trong cc t thch hp c thit k m bo thng hi, ht c cht chy nh kh c hoc mi. i vi cc php th i hi chnh xc cao phi quan tm cc yu t sau: Cch ly vi cc ngun rung v sc c hc v chng c th gy tc ng xu i vi cc dng c c nhy cao, v d cc ngun rung, xc t thang my, xa l v.v. Lm nhn v chng in tch tnh in cho tng, trn, sn nh v nu cn thit cn lc khng kh kim sot bi. Dng ca knh 2 lp v chng nh sng mt tri chiu trc tip. Kim sot nhit PTN khi cn thit nhng cn m bo khi iu chnh nhit , th dao ng nhit khng vt qu 20C trong 1h. Kim sot m nu cn thit Cch ly cc tc ng ca in t trng bn ngoi.Vic cch ly ny l khng cn thit cho cc php o dng mt chiu hoc in p xoay chiu c tn s thp nhng rt c ngha khi o ti tn s cao (RF). Pht x t cc my pht ni b v t cc thit b my tnh c th cng gy tc ng n nhiu php o v cn phi nh gi cc tc ng ny.

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S dng n p v cc b lc ngun in cung cp, nu cht lng dng sng v n nh ca in p ngun c tc ng ng k ln php o cho php o. iu ha khng kh (8) Tc qut gi ca iu ha cn thch hp m bo iu kin nhit . Kh i vo nn c lc gim bi v nhit. Tr trng hp thit b th v i tng th c hng s nhit thi gian ngn, cc thit b khc cn c thi gian t c cn bng nhit trc khi c th.

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nh sng (10) Ni lm vic cn c cung cp sng. nh sng ti u ti bn th nghim cn t c vo khong 400-500lux

Ngun in cung cp (11) Ngun in cung cp cho PTN nn c cung cp t mt ngun in ring r c lp vi ngun in cung cp cho xng sn xut hoc ph ti ln.

(12) Ngun in cung cp cho cc bn th nghim nn c n p. Phi c h thng tip t chung gia cc bn th nghim c th ni t c cc thit b, dng c in khi cn thit.

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Ln ban hnh: 3.10

Trang: 7/ 16


Th nghim ti trm lu ng hoc hin trng (13) i vi cc php th nghim ti hin trng hoc ti cc trm lu ng phi c lu c bit v lp thnh vn bn i vi cc yu cu: Cch thc lu gi v vn chuyn thit b trnh rung xc, v thay i ca nhit ; Quy nh thm v kim sot cho cho thit b; Vic tip cn/s dng thit b; An ton cho cc h s. khng m bo o. (14) Ngoi cc yu t nhit , m phi lu c bit i vi cc yu t nm ngoi tm kim sot ca nhn vin PTN (v d nh: trng in t, s n nh ca ngun cung cp in) khi trin khai v tin hnh cc php th. c lng khng m bo o

5.4.

Yu cu chung (1) PTN in-in t tin hnh vic din gii s ph hp vi yu cu k thut (gii hn cho php) lin quan n th an ton in phi xy dng v lp thnh vn bn v chnh sch trong vic tnh ton khng m bo o. Chnh sch ny cn bao gm vic xem xt n mi yu t tc ng n khng m bo o (loi A v loi B) v phi xc nh cch thc m PTN s s dng kt hp cc yu t tc ng cng vi tin cy c s dng khi tnh khng m bo o. Khi thch hp, khng m bo o phi c cng b trong bo co th nghim. (2) PTN phi c quy nh cho vic xem xt, v khi cn thit cp nht vic tnh ton khng m bo o cho thit b chun sau khi c hiu chun li hoc khi c cc thay i khc m c nh hng ng k n cc thnh phn ca khng m bo o. Vic xem xt nh vy s bao gm c khng m bo ca cc kt qu hiu chun mi nht cho cc thit b chun v vic xem xt v n nh ca cc thit b thng qua vic so snh kt qu hiu chun mi vi kt qu trc. H s chi tit ca qu trnh tnh ton khng m bo o phi c duy tr v cp nht b sung thng xuyn. Phn sau y nu mt s tnh hung cn thit hoc khng cn thit phi tnh ton KB o: Nu cc thng s th c quy nh dung sai (sai s) nh th cp (rating test), th yu cu cn c tnh khng m bo o Th tnh nng cho vic xc nh s ph hp ca sn phm: + Trng hp 1: nu vic c s ch t thit b o hoc thit b th, th KB o phi tnh n + Trng hp 2: i vi vic xc nh s ph hp bng quan st mt thng, th khng phi tnh KB o

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Ln ban hnh: 3.10

Trang: 8/ 16


i vi cc php th m kt qu mang tnh nh tnh th khng phi tnh KB o. 5.4.7 Kim sot d liu (4) Ngi c thm quyn k thut phi m bo cc kim tra thch hp v tnh ton v truyn d liu c thc hin trc khi k vo ti liu. Sai st trong qu trnh ghi li thng l nguyn nhn chnh cho ra kt qu sai. Ngi c trch nhim th hai nn tin hnh kim tra mi tnh ton v truyn d liu. Bn ghi cng vic cn phi c ch cho ngi c trch nhim th hai k. Cn phi c lu c bit m bo s dng ng cc cng thc trong bng tnh ca my tnh. Cc sai st thng hay xut hin khi cc tp tin ca my tnh nh cc bng tnh, cc tp tin ca cc bo co c s dng li bng cch ghi thng tin mi ln cc thng tin c. Do vy cn lu ch nn lu gi thng tin vi cc tp tin mi. Khi cc php o c t ng ho cao v/ hoc i vi cc cng vic lp i lp li; hay khi cc thng tin c x l bng in t, th lu trng tm c chuyn t vic kim tra cc sai st do h thng to ra, sang kim tra nh gi v ghi li cc kt qu nm ngoi di d kin. Thit b

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5.5

Thit b th c iu khin bng my tnh (1) Phi m bo duy tr cht lng cho cc phn mm do PTN t pht trin. Thit b th t ng phi c hiu chun theo cch thc nh cho cc thit b o v th khc. Trong trng hp s dng my tnh ghi li t ng d liu v kim sot vic tin hnh th cn c cc lu sau: Vic hiu chun h thng c th rt kh khn ty thuc phn ln vo kh nng tip cn c vi tn hiu u vo, tn hiu u ra ca tng b phn. Nu tng b phn c th tch bit c khi h thng x l d liu th n c th c hiu chun theo cch thc thng thng v vic ph duyt ring r h thng x l d liu c th c thc hin s dng B chuyn A/D v h thng giao din. Trong trng hp cc b phn khng th tch bit c th h thng phi c hiu chun cho tng th, cho trng thi tnh hoc trng thi ng. Phn mm, hoc c cung cp cng vi thit b hoc c t xy dng s c cng cc yu cu c bn nh phn cng. N phi c kim tra sai li khi hot ng.

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Ln ban hnh: 3.10

Trang: 9/ 16


Cch thc c tin hnh ty thuc vo bn cht ca h thng, kh nng tip cn c vi nhng b phn ring r v cu trc ca chng trnh. Trong hu ht cc trng hp, cc chng trnh chun vi cc d liu c th c to ra cung cp cho h thng nhm kim tra nh k khi pht trin hoc thay i h thng. Cn phi c bit lu m bo cc chng trnh chun bao qut ton b di cc gi tr cn thit v bao gm s kt hp cc tnh hung gi nh nhm pht hin c cc sai li ca chng trnh C th s dng mu chun kim tra s hot ng ca c h thng theo inh k. Cc sai st do cc tc ng bn ngoi s kh khn hn pht hin v loi b do bn cht khng on nh trc c ca n. Cc tc nhn bn ngoi c th c do trng in, t v d nh t ng dy in ngun, cc ngun vi sng, hoc thm ch cc rung v xc c kh. Kt qu l c cc gi tr th hin lm sai lch kt qu th v iu ny c th pht hin c tt nht thng qua quan st. Phn mm nn c lu kim tra bo tr. Cc chng trnh c sa i nn c cc bc c bn th chp nhn. Kt qu ca cc php th ny nn c ghi li v c lu gi trong h s bo tr phn mm. Vic bo tr phn mm nn bao gm ch back-up v k hoch khi phc h thng 5.6 Lin kt chun

Lin kt chun (1) Cc thit b th nghim v hiu chun c nh hng ln n kt qu th nghim v khng m bo o ca php th (k c cc thit b s dng theo di iu kin mi trng) phi c hiu chun. Vic hiu chun thit b phi tun th theo Chnh sch v lin kt chun ca VILAS (APL 02 Chnh sch v lin kt chun)

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Hiu chun (3) Chun v thit b o phi c hiu chun cho di o, c chnh xc ph hp vi quy nh trong cc phng php th tng ng. Thi hn hiu chun cho cc thit b th ca PTN in-in t (4) Phn 3 ca ti liu ny nu ra thi hn ti a cho vic hiu chun ca mt s chun v thit b th. Cn lu l thi hn a ra l thi hn ti a khuyn co vi cc iu kin sau phi c tun th: Thit b c cht lng tt v c chng t c s n nh, v C thit b v nhn vin c nng lc thc hin cc kim tra nh k. Trong trng hp cc iu kin trn khng c p ng, PTN phi p dng khong thi gian hiu chun ngn hn.AGL 07 Ln ban hnh: 3.10 Trang: 10/ 16


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PTN c th ko di thi gian gia 2 ln hiu chun da trn cc bng chng v s n nh ca thit b, tn sut s dng, chnh xc yu cu, nng lc ca nhn vin trong vic thc hin kim tra nh k v kt qu tham gia cc chng trnh TNTT/SSLP. PTN phi gi bng chng chng minh vic ko di chu k hiu chun cho VP CNCL trc cuc nh gi t nht 1 thng vn phng xem xt. Vic ko di chu k hiu chun khng c vt qu 1/3 chu k hiu chun ti a quy nh. Trong trng hp PTN t hiu chun, h s vic t hiu chun phi c lu gi. Ly mu

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Nu PTN c thc hin vic ly mu th phi m bo cc iu kin sau: (1) PTN phi sn c th tc ly mu c lp thnh vn bn (do PTN t xy dng hoc c ban hnh tiu chun quc gia, khu vc, quc t). Nu PTN s dng phng php ly mu do PTN t xy dng th phi chng minh bng s liu thch hp v tnh hiu lc theo mc ch s dng ca phng php ni b . Bin bn th nghim phi trch dn th tc ly mu khi PTN mong mun m rng kt qu th nghim t mt mu th cho c l mu. Qun l mu th nghim Khi cc thit b c th nghim c tho ri ra hoc s dng cng vi cc linh kin ph kin khc th cc thit b ny cn c xc nh v lu gi thch hp. Khi tin hnh th in hnh hay th nghim cho vic pht trin sn phm, cn m t chnh xc kiu thit k s c xc nhn ph hp. Ngoi ra PTN phi m bo tnh bo mt thng tin v cc thit b c th. Mu th cho mc ch ph duyt phi l i din cho sn phm sn xut. Mi s thay i v phn cng cng nh phn mm ca mu th nhm lm cho mu ph hp phi c nu r trong h s th, tr trng hp vic th s c thc hin li ton b.

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5.8 (1)

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5.9 m bo kt qu th nghim v hiu chun (1) PTN cn tham gia cc chng trnh th nghim thnh tho (PT) tng ng. Trong trng hp PTN tham gia PT khng t yu cu theo quy nh ca chng trnh th PTN cn c hnh ng khc phc thch hp. Nu PTN th nghim trong lnh vc m hin cn cha c chng trnh PT th PTN cn nh k s dng cc mu chun (artifact) tin hnh cc php th nhm cung cp bng chng v nng lc ca nhn vin th nghim v s n nh, tin cy trong hot ng th nghim.Ln ban hnh: 3.10 Trang: 11/ 16

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AGL 07


5.10 Bo co kt qu Yu cu chung (1) Khi thc hin bo co v th nghim an ton in phi bao gm tt c cc iu nu trong phng php th tng ng. Khi mt iu no ca phng php th khng p dng, th bo co th nghim phi nu r iu khng lin quan. Khi phng php th lin quan n mt thit b c th vin dn mt s iu trong phng php th chung, th bo co th nghim phi nu r iu ny c thc hin trong php th Bo co lin quan n vic th li ca thit b trc th v khng ph hp th phi ch r s thay i no c thc hin cho i tng th. Nu ch th li mt phn th phi vin dn r n bo co th trc lin quan n cc php th ph hp. Trong trng hp tin hnh th li ton b, th chi tit ca s thay i s khng quan trng bng vic nu r thit k mi vi bn v, nh chp, hnh dng v thit k PCB. 5.10.3 Bo co th nghim 5.10.3.b Cng b s ph hp (1) Nu kt qu th nghim hoc hiu chun khi c tnh khng m bo o ri vo trong phm vi cng b th kt qu th nghim v khng m bo o ca n phi c cng b. Mi cng b v s ph hp phi bao gm c s m da trn cng b c a ra (v d tun theo cc yu cu php quy) Cc cng b v s ph hp phi nu ra cc phn hay iu no ca yu cu k thut th hay cc thng s v di, cho vic th nghim, m theo a ra cc cng b v s ph hp. APLAC c hng dn v vic din gii bo co th nghim trong APLAC TC004. APLAC TC004- APLAC Method of Stating Test and Calibration Results and Compliance with Specification 5.10.4.1b Bo co khng m bo o (1) Khi kt qu o l con s th phi cng b khng m bo o lin h vi kt qu . Khi cng b s ph hp vi yu cu k thut (v kt qu o khng phi l con s) th khng cn phi cng b khng m bo o nhng phi xt n yu t ny khi xc nh s ph hp.

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khng m bo o cng b phi lin h trc tip vi kt qu o, ch khng phi ch vi khng m bo o nh nht ca PTN. iu c ngha l n phi bao gm tt c cc khng m bo o thnh phn quan trng t cc dng c o ring r m cn cha c tnh n y trong khng m bo o nh nht ca PTN. khng m bo o tnh trc ch c th cng b khi c cc bng chng bng vn bn. Nu khng m bo c c nh s dng lch chun xc nh trc cho h thng o ca PTN th phi t gii hn chp nhn c thch hp cho s phn tn ca kt qu. Ngoi tr c quy nh khc trong yu cu k thut cho vic hiu chun v th th khng m bo phi c cng b vi mc tin cy l 95%. Phi cng b mc tin cy v h s ph K. khng m bo c lng nn c lm trn vi vic s dng ti a 2 con s c ngha. khng m bo nn c cng n v nh l kt qu o. Tuy vy c trng hp s l hp l hn nu khng m bo c cng b nh l t l phn trm cho tt c cc kt qu o. C th tham kho thm v hng dn din gii v c lng khng m bo o trong ti liu ca APLAC APLAC TC005- Interpretation and Guidance on the Estimation of Uncertainty of Measurement in Testing

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(6)

(7)

5.10.6 Kt qu th nghim c c t nh thu ph (1) Trng hp ton b cc ch tiu c thc hin bi nh thu ph th PTN phi cung cp cho khch hng phiu kt qu ca nh thu ph.

AGL 07

Ln ban hnh: 3.10

Trang: 13/ 16


PHN 3 THI HN HIU CHUN THIT BCc yu cu di y v chu k hiu chun li v kim tra cc thit b th nghim bng chun theo phng php hiu chun ring v cc th tc kim tra phi c tun theo. Cc khong thi gian c a ra l khong thi gian ti a v ph thuc vo yu cu v chnh xc v cch s dng cc thit b. Thng thng vic hiu chun c thc hin bi cc phng hiu chun c thm quyn v PTN sau khi nhn giy hiu chun s tin hnh nh gi mc ph hp ca thit b vi mc ch s dng ti PTN. Nu phng th nghim mun t thc hin cc php hiu chun thi phi chng minh rng phng c nng lc thc hin cng vic ny theo nh quy nh iu 5.6.2.1 ca ISO/IEC 17025. Cc php kim tra thng c cc k thut vin ca phng th nghim thc hin. Nu vic kim tra c thc hin bi n v c thm quyn th phi ghi r trong phiu th nghim l p ng c yu cu ca cng vic.Thi gian hiu chun ti a (nm) Kim tra gia k (thng)

Thit b

Ghi ch suy gim v p tuyn tn s. Kim tra p ng tn s; Tn hao do in tr v tn hao ngc hng nm khi cn thit. Kim tra so snh vi chun ca PTN So snh vi nhau So snh vi dng c c cng mc chnh xc

B suy gim (khuch i) Attenuators

3

Cu o Bridges T in Capicitors Dng c o hin th bng s. Digital meters Dng c hiu chun k thut s c t kim tra Digital calibrators with self checking Cun cm Inductors Thit b o, ch th v ghi (thit b tng t) Instruments, indicating and recording (analog only) Bin p o lng, bin p t l Instrument and ratio transformer B my th bin p o lng Instrument transformer test set Bin tr Potentionmeters in tr Resistors Ngun nhiu RF RF noise sources

5 5 1 2 5

12 12 6

12

So snh vi nhau

5

6

5 5 5 5 2 12 So snh vi nhau 12

AGL 07

Ln ban hnh: 3.10

Trang: 14/ 16


Thit b Thit b o cng sut RF RF power measuring equipment My pht tn hiu Signal generators Hp phn chia in p Volt ratio boxes Chun cng t in Loi c in t (Electro-mechanical) 3 1

Thi gian hiu chun ti a (nm) 6

Kim tra gia k (thng)

Ghi ch So snh vi nhau. Kim tra VSWR Khi s dng mt cch ring r cung cp cc tn hiu chun So snh vi nhau So snh Khong thi gian tu thuc vo khng m bo o yu cu v lch s hot ng trong thi gian trc So snh So snh

5

12

2

3

Chun cng t in Loi in t (Electronic)

1-2

3

Pin chun v chun in t Standard cells and electronic 2 references Chun thi gian v tn s 1 Time and Frequency Standards Chun chuyn i AC-DC Transfer standards, AC-DC B chia in p Voltage Dividers My o gia tc Accelerometers My o gi Anemometers Bung th kh hu Environmental chambers 5 5 1 2

6

12

cho kt qu tt nht, nh k hiu chun 2 nm mt ln

5

Khi s dng

IEC 68-2-1, -2,-3, -33,38, -39 Kim tra ti nhit lm vic

My th lc 2 Force testing machines m k Hygrometers Loi o theo nguyn l nhit kh 5 nhit t m k 1 Hygrometers Loi in t Qu cn chun Loi hp kim crm-nikel, thp khng r Qu cn cng tc Loi hp kim crm-nikel, thp khng r, cc loi hp kim khc Thc o 2-5 Micrometers, dial gauges, caliper, etcAGL 07 Ln ban hnh: 3.10

6

So snh nhit k ti nhit bung vi kh ca bc (wick dry)

6

Trang: 15/ 16


Thit b Thit b o p sut v chn khng Pressure and vacuum gauges Cp nhit ngu Thermocouples Kim loi him (rare metal) Kim loi (base metal) 1

Thi gian hiu chun ti a (nm)

Kim tra gia k (thng)

Ghi ch

100 h s dng hoc 3 nm Ty theo mc ch s dng Kim tra im ng bng ngay sau ln hiu chun u, sau kim tra 6 thng mt ln So snh vi nhit k chun ti 2 im trong di lm vic. So snh vi nhit k chun ti 2 im trong di lm vic Kim tra ti im ng bng trc khi s dng v sau khong thi gian 6 thng.

Nhit k chun, loi cht lng trong 5 thu tinh

Nhit k cng tc loi cht lng trong 5 thu tinh

Nhit k cng tc loi in t

5

Nhit k cng tc loi in tr Cn Weighing appliances Thit b th chy Flammability equipment Thit b th chy dng dy nung Glow wire apparatus Thit b th ngn la dng kim Needle-flame apparatus Thit b th theo du vt tracking test apparatus Dng, ngn th v u th Gauges, test fingers, test pins ... Cc thit b th cao p Hipot tester Ba p Impact hammer My th xung Impulse testers My phn tch sng hi v ph Spectrum and harmonic analysers

5

3 Kim tra lc Hiu chun nhit Kim tra xc nhn kch thc ban u Kim tra gim st Kim tra dung dch Cc ln hiu chun tip theo tu thuc vo tn sut s dng

Ban u

6

Ban u 2 5 1 1

Trong khi Kim tra s dng

Cc thng s c hiu chun tu thuc vo vic s dng

AGL 07

Ln ban hnh: 3.10

Trang: 16/ 16

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YC Phong Thu Nghiem VILAS