EVN HPCSNLAQUY TRNH S DNG THIT B TH NGHIMK hiu: .

THIT B HIU CHUN NHIT IN TR A NNG ADT221ALn ban hnh: 01

Ngy:

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MC LCCHNG 1 QUY NH CHUNG3I.MC CH3II.I TNG P DNG CA QUY TRNH3III.PHM VI P DNG CA QUY TRNH3IV.NH NGHA, VIT TT3V.C S BIN SON QUY TRNH NY4CHNG 2 THNG S K THUT V QUY NH AN TON5I.CHC NNG THIT B5II.THNG S K THUT51)Cu trc c bn52)Thng s k thut:8III.QUY NH AN TON13CHNG 3 QUY TRNH S DNG THIT B14I.CC CHC NNG C BN141)Cc ch c bn142)o.153)To ngun26II.CI T V CC S DNG CP CAO361)Giao din RS232372)Qun l nh373)Thi gian384)Tnh nng385)Cc thit lp h thng42

CHNG 1 QUY NH CHUNGI. MC CHS dng hng dn vn hnh thit b hiu chun nhit in tr a nng ADT221A cho cc k s, nhn vin sa cha ca Cng ty thy in Sn La.II. I TNG P DNG CA QUY TRNHNhng ngi cn hiu r qui trnh: Qun c, Ph qun c Phn xng T ng. T trng, t ph cc t chuyn mn ca PXT Cc nhn vin Phn xng T ng c phn giao s dng thit b.III. PHM VI P DNG CA QUY TRNHQuy trnh ny c p dng khi thit b th nghim trn c a ra s dng.IV. NH NGHA, VIT TTKhiu ngha

PXTPhn xng T ng

PXVHPhn xng Vn Hnh

TBTNThitb th nghim

P. TNTPhng th nghim T ng

P. TNHDPhng th nghim Ha du

SCSCSa cha s c

V. C S BIN SON QUY TRNH NY Ti liu hng dn s dng thit b ca nh sn xut: ADT221A Multifunction Process Calibrator Users Manual Mt s hnh nh thit b:

Hnh 1: Thit b to dng p nh ADT221A

Hnh 2: S dng ADT221A vi chc nng hiu chun cc b TransmitterCHNG 2 THNG S K THUT V QUY NH AN TONI. CHC NNG THIT BL thit b c s dng nhiu trong o lng cng nghip, thc hin c cc chc nng sau: o cc tn hiu: mV, V, mA, Hz, Pulse, Ohms, RTDs, TC, On/Off To ngun: mV, V, mA, Hz, Pulse, Ohms, RTDs, TC, On/Off Kh nng giao tip HART (Highway Addressable Remote Transducer) cho php hiu chun, bo dng v x l cc li thit b trng theo chun HARTII. THNG S K THUT1) Cu trc c bn

Hnh 3: Cc mt chc nng ca thit bChc nng ca cm cc khe cm c th hin trong hnh trn:Bng 1: M t cc khe cm chc nngGicM t

2&9o p, dng, in tr 2W,xung ,tn s ,kim tra tip im

2, 9 & 10o in tr 3W

1, 2, 9 & 10o in tr 4W

4 & 7Ngun p, ngun dng (ngun ngoi), ngun xung, tn s

4 & 5Ngun dng ( ngun trong )

3 & 8Ngun in tr

5 & 6Ngun 24VDC Loop

11o cp nhit

12Gi lp cp nhit

RS232Kt ni vi my tnh

Chc nng ca cc phm nhn:Bng 2: M t cc phm s dngSTTTnM t

1Bt /Tt thit b

2Khi ng kt ni HART

3La chn chc nng to ngun v o milivolt, volt, milivolt, xung, tn

4Chn ngun in tr hoc kim tra tip im

5La chn chc nng to ngun v o RTD/cp nhit

6To ngun v o dng mA

7Chn o v to ngun p lc

8Vo qun l Task

9Vo qun l Setup

10Bt v lu nh

11Thot khi trang hin hnh hoc hy 1 la chn

12Xc nhn la chn hay hot ngTrong php tnh mang ngha du bng (=)

13Khi ng vng hin th o /to ngunLa chn i tng trong listTi trang tnh ton , cung cp cc hm (+,-,x, )

14La chnThc hin cc chc nng c xc nh theo nhn pha trn

15SS dng khi yu cu

2) Thng s k thut:a) Bng c tnh o cc tn hiu in ( 205, chnh xc tnh cho 01 nm)Bng 3: c tnh o cc tn hiu inChc nngDi o phn gii chnh xc

Vdc-75.0000 to 75.0000 mV0.1V0.01%RD+0.005%FS

-30.0000 to 30.0000 V0.1 mV0.01%RD+0.005%FS

Idc-30.0000 to 30.0000 mA0.1A0.01%RD+0.005%FS

R2W0 to 400.000 1m0.02%RD+0.005%FS

3W0 to 400.000 1m0.02%RD+0.005%FS

4W0 to 400.000 1m0.01%RD+0.005%FS

2W0 to 4000.00 10m0.02%RD+0.005%FS

3W0 to 4000.00 10m0.02%RD+0.005%FS

4W0 to 4000.00 10m0.01%RD+0.005%FS

f1 to 50000.0 Hz0.1Hz0.005%RD+0.002%FS

Xung0 to 9999991N/A(Not available)

Ch (1):Khi mi trng lm vic l (-10 ti 15 v 25 ti 50) th h s nhit l: o in p, dng in: (0.001%RD0.0015%FS) /. o in tr 2-wire, 3-wire, 4-wire: (0.002%RD0.001%FS)/. c tnh u vo: o in p: Tng tr vo ln hn 1M, qu in p ca cc cng l 300VDC. o dng in: Tng tr u vo nh hn 10, qu dng cc cng 1A DC o tn s, xung: Tng tr u vo ln hn 500M, xung vung, in p mc thp nh hn 0.3V, mc cao ln hn 2V, phn trm xung (duty cycle) t 20% n 80%, qu in p cc cng 30VDC. o in tr, in tr nhit (Thermal Resistor): Dng o khong 0.7mA di 400 v khong 0.3mA di 4000, qu in p cc cng 30VDCb) Bng c tnh to cc tn hiu in ( 205, chnh xc tnh cho 01 nm)Bng 4: c tnh to cc tn hiu inChc nngDi o phn gii chnh xc

Vdc-10.000 to 75.000 mV1V0.02%RD+0.005%FS

0 to 12.0000 V0.1mV0.02%RD+0.005%FS

Idc0 to 22.000 mA1A0.02%RD+0.005%FS

R1 to 400.00 10m0.02%RD+0.005%FS

1 to 4000.0 100m0.03%RD+0.01%FS

f0 to 50000.0 Hz0.1Hz0.005%RD+0.002%FS

Xung0 to 9999991N/A(Not available)

DC24VN/A N/A0.5V

Ch (2):Khi mi trng lm vic l (-10 ti 15 v 25 ti 50) th h s nhit l: Ngun tr, dng, p: (0.001%RD0.0015%FS) /c tnh ngun pht: Ngun Milivolt: Ti ln nht 1mA, h s thay i theo ph ti nh hn 50V/mA. Ngun 12V: Ti ln nht 5mA, h s thay i theo ph ti nh hn 1V/mA. Ngun dng: Dng tiu th ti a l 20mA. Ngun in tr: (1 ti 110) dng in kch thch l (0.6mA ti 4mA), (110 ti 400) dng in kch thch l (0.3mA ti 4mA), (400 ti 1000 ) dng in kch thch l (0.06mA ti 1.5mA), (1000 ti 4000 ) dng in kch thch l (0.01mA ti 0.6mA). i vi di (1 ti 400 ) th dng iu khin nn l 1mA, v di (400 ti 4000 ) th dng iu khin nn l 0.1mA. Ngun xung, tn s: Xung vung vi phn trm xung l (5010)%, bin 2-12V, chnh xc bin 3%FS. Loop 24VDC: Dng ti ti a 50mA, bng phng nh hn 50mV To ngun nhit in tr, cp nhit in: c quyt nh bi chnh xc ca ngun mV, ngun in tr, theo mc 90 ca thang o nhit quc t. Tt c cc cng u c bo v ngn mch. Qu in p cc i ca tt c cc cng ngun l 30VDC (trong thi gian ti a l 1pht), ngoi di ny s gy nguy him cho thit b.c) To ngun cp nhit (Thermal Couple) v s dng n kim tra chnh xc nhit (mi trng lm vic 205).Bng 5: chnh xc to ngun cp nhit chnh xc php o v to ngun cp nhit

o v gi lpTiu chunDi nhit () chnh xc ()

Php oNgun

SIEC 584-50 to 1768-50 to 4001.01.1

400 to 10000.60.6

1000 to 17680.70.8

RIEC 584-50 to 1768-50 to 2001.41.4

200 to 5000.60.6

500 to 17680.60.7

BIEC 5840 to 182050 to 4503.83.8

450 to 8000.90.9

800 to 18200.70.7

KIEC 584-270 to 1372-250 to -2001.01.1

-200 to -1000.40.5

-100 to 6000.30.3

600 to 13720.40.5

NIEC 584-270 to 1300-250 to -2001.51.6

-200 to -1000.50.6

-100 to 13000.40.5

EIEC 584-270 to 1000-250 to -2000.60.7

-200 to -1000.30.3

-100 to 00.20.2

0 to 7000.20.3

700 to 10000.20.4

JIEC 584-270 to 1200-210 to -1000.30.3

-100 to 12000.30.4

TIEC 584-270 to 400-250 to -2000.80.9

-200 to 00.40.4

0 to 4000.20.2

CASTM E9880 to 23150 to 10000.50.5

1000 to 18000.70.9

1800 to 23151.01.4

DASTM E9880 to 23200 to 1000.50.5

100 to 11000.40.5

1100 to 20000.60.9

2000 to 23200.91.3

GASTM E17510 to 23150 to 2002.42.4

200 to 4000.40.5

400 to 14000.40.5

1400 to 23150.71.0

LDIN43710-200 to 900-200 to -1000.20.3

-100 to 4000.20.2

400 to 9000.20.3

UDIN43710-200 to 600-200 to 00.40.4

0 to 6000.20.3

d) To ngun RTD v s dng RTD o chnh xc nhit (mi trng lm vic 205).Bng 6: chnh xc ngun RTD chnh xc php o v to ngun RTD

o v gi lpTiu chunDi nhit () chnh xc ()

o2W,3Wo4WNgun

Pt10(385)IEC 751-200850-1002000.650.60.65

2006000.820.720.82

6008500.960.820.96

PT100(385)IEC 751-200850-1002000.150.10.15

2006000.260.160.26

6008500.340.200.34

Pt100(3916)IEC 751-200850-1002000.15 0.1 0.15

200600 0.260.160.26

600850 0.330.200.33

Pt200(385)IEC 751-200850-100200 0.370.32 0.69

200600 0.51 0.41 0.92

600850 0.61 0.48 1.08

Pt500(385)IEC 751-200850-100200 0.20 0.16 0.36

200600 0.32 0.22 0.54

600850 0.40 0.27 0.67

Pt1000(385)IEC 751-200850-1002000.1 0.05 0.25

200600 0.2 0.10 0.42

600850 0.27 0.14 0.54

Cu10(427) IEC 751-100260 -100260 0.61 0.56 0.61

Cu50(385) IEC 751 -50150-501500.17 0.13 0.17

Cu100(385) IEC 751 -50150 -5050 0.12 0.09 0.12

Ni120(672) DIN 43760 -100260 -100260 0.07 0.05 0.07

Ni100(618) DIN 43760 -100260 -100260 0.08 0.06 0.08

III. QUY NH AN TON Khng s dng thit b trong mi trng d chy n. Khng ngn mch ngun pin. Khng t ngun ln hn 30V vo 02 u que o, ngoi tr vic o in p vi di 30V.CHNG 3 QUY TRNH S DNG THIT BI. CC CHC NNG C BN1) Cc ch c bnKhi khi ng thit b, hay khi tr v t cc hot ng mc cao hn (Setup, Task, Measuring options, Sourcing options) thit b lun lun tr v ch c bn (Basic Mode) vi mn hnh chnh hin th in p c phn o v to ngun. ch ny, ta c th s dng cc phm Up/Down la chn vng hin th php o hay to ngun. Cc phm chc nng la chn i lng cn pht hay o.

Hnh 4: Mn hnh ch Basic ModeNgoi ra, ta cn c th: o v to im 0 ca gi tr o (nu c), d liu ca thit b c thay i tc th v c lu tng bc theo cc mc ty chn ngi dung. Cc chc nng: to ngun hay gi lp tn hiu, hiu chnh tng bc Stepping, chc nng Ramp, Set v Reset gi tr pht. Bt gi nh (ch Capture).2) o. ch Basic Mode, ta c th n cc phm v la chn i lng trong list hin ra o hoc pht. S dng cc phm Up/Down chuyn cc mn hnh SOURCE hoc MEASURE.a) o Volt/Milivolt/Hz Chuyn sang mn hnh MEASURE, n phm , s dng cc nt Up/Down v ENTER la chn thng s cn o. tng chnh xc, ta chp 2 que o li v n phm la chn (softkey) Zero xa gi tr v 0. Kt ni gic cm nh hnh v.

Hnh 5: o Volt/ Milivolt

b) m xung Chuyn sang mn hnh MEASURE, n phm , s dng cc nt Up/Down ti i lng th 4 trong list la chn v ENTER xc nhn. n phm la chn Options hin ra giao din Setup cho m xung. y ta c th thay i sn pht hin xung. Sau khi thc hin m xung xong, ta c th n phm la chn Zero reset vic m xung v bt u ln m xung mi. Kt ni gic cm nh hnh v.

Hnh 6: o xungc) o in tr Chuyn sang mn hnh MEASURE, n phm , s dng cc nt Up/Down v ENTER la chn cc di o. n phm Options Softkey hin ra giao din ci t o in tr. tng chnh xc, ta chp 2 que o li v n phm la chn (softkey) Zero xa gi tr v 0. Kt ni gic cm nh hnh v

Hnh 6: o in trd) Kim tra tip im ( Limit Switch ) Chuyn sang mn hnh MEASURE, n phm , s dng cc nt Up/Down ti i lng th 3 trong list la chn v ENTER xc nhn. S dng sofkey View xem bng ghi kt qu kim tra vi s lng ti a l 10. Mt bn ghi th hin trng thi ca tip im v gi tr ngun. Kt ni gic cm nh hnh v.

Hnh 7: o tip im Switche) o dng in Chuyn sang mn hnh MEASURE, n phm, s dng cc nt Up/Down v ENTER la chn thng s cn o. tng chnh xc, ta chp 2 que o li v n phm la chn (softkey) Zero xa gi tr v 0. Kt ni gic cm nh hnh v.

Hnh 7: o dng inf) o cp nhit Thermal CoupleThit b h tr 13 kiu cp nhit tiu chun S, R, B, K, N, E, J, T, C, D, G, L v U. Php o cp nhit chp nhn 2 phng php b kt ni tiu chun: ch tham chiu ni v tham chiu bn ngoi. Nu la chn ch tham chiu ni, my s t ng o nhit ca ch tip gip, ngay gic cm cp nhit. Nu la chn ch tham chiu bn ngoi, ta phi nhp vo mt gi tr nhit tham chiu c nh trc khi tin hnh o cp nhit. Chuyn sang mn hnh MEASURE, n phm, s dng cc nt Up/Down ti i lng th nht trong list la chn v ENTER xc nhn. n Options Softkey hin ra giao din Setup cho php o. y ta c th thay i kiu cm bin cp nhit, n v nhit (, K, ) v phng php b kt ni tiu chun. t c chnh xc php o nhit cao hn, ta c th set zero gi tr o c trong php o milivolt. Kt ni gic cm nh hnh v.

Hnh 8: o cp nhit

g) o RTDThit b h tr 11 dng RTD thng thng, ngoi ra cn ta cn c th thm vo c 10 dng khc ty . Thit b chp nhn cc kiu kt ni u vo RTD 2W, 3W, 4W. Kiu kt ni 4W cho kt qu o chnh xc hn. Chuyn sang mn hnh MEASURE, n phm , s dng cc nt Up/Down ti i lng th 2 trong list la chn v ENTER xc nhn. n Options Softkey hin ra giao din Setup cho php o. y ta c th thay i kiu cm bin RTD, kiu kt ni v n v nhit (, K, ). t c chnh xc php o nhit cao hn, ta c th set zero gi tr o c trong php o in tr. Kt ni gic cm nh hnh v.

Hnh 9: o RTD

h) o p lcMc o ny ch s dng khi c thm module p lc.Khi module p lc c kt ni, biu tng p lc s xut hin trn thanh trng thi v ng thi c ting bip pht ra. Hnh 10 th hin cc kt ni khi o p lc.

Hnh 10: o p lc.Thc hin cc bc sau o p lc: Chuyn sang mn hnh MEASURE, nhn phm 01 hoc 02 ln. S dng cc nt Up/Down ti i lng th nht trong danh sch la chn v nhn ENTER xc nhn. Nhn phm mm Unit hin ra danh sch la chn n v o c h tr bi thit b. Nhn phm mm Module hin ra cc thng tin v thit b. tng chnh xc cho php o, ta c th nhn phm Zero trc khi thc hin php o.3) To ngun ch Basic Mode, ta c th n cc phm v la chn i lng trong list hin ra pht. S dng cc phm Up/Down chuyn mn hnh t MEASURE sang SOURCE.a) Thay i gi tr pht ra mn hnh Basic Mode, ta n 1 phm s bt k s thy 1 hp hin ra vi s ta va bm trn phn hin th gi tr pht. y chnh l gi tr u ra ca i lng c pht. Nhn Enter nu ta ng , n Abort softkey hoc Esc hy la chn.Ch rng nu ta khng lm g trong khong 15s th hp chn s s t ng tt v khng c gi tr mi no c thc hin. Thit b s t ng nh gi gi tr nhp vo l hp l hay khng. Nu n vt di u ra th gi tr s t ng b loi b.b) Tinh chnh gi tr pht ra. ch Basic Mode, nhn cc phm Left/Right tinh chnh gi tr Source. Ch s c iu chnh s c du gch chn. Ta c th s dng cc phm s nhp vo gi tr hoc dng Up/Down tng gim gi tr . Gi tr c thay i s c tc ng tc thi ti u ra. thot ch tinh chnh, n Esc hoc Enter.Ch nu ta khng thay i g trong khong 15s th thit b s t ng thot trng thi tinh chnh v ta khng th thay i c g nu gi tr nhp vo vt qu di u ra. Lc ny thit b s pht ra ting bp.c) Reset gi tr pht. ch Basic Mode, trong cc trng hp ngun pht Volt, milivolt, tn s, in tr v dng in, thit b h tr chc nng reset. Bng cch bm vo phm Reset softkey v u ra s c gi tr bng khng ngay tc th.d) To mc thay i gi tr.Trc khi to bc thay i, ta phi thc hin cc thit lp trong Step Setting. Bng cch chuyn sang mn hnh SOURCE v nhn phm softkey Step, ta s vo bng thit lp ca ch Step.

Hnh 11: Ci t tng bc (Stepping Configuration)Gi tr bt u khng c trng vi gi tr kt thc v chng khng c vt qu di u ra. C 3 ch Stepping: Engineering unit, scale v step points.Nu ch engineering unit th Transfer function lun l Linear.Lu l ch ch auto step th cc gi tr Run Mode v Step Time mi c hiu lc. Di ca Step Time l 1~3600s.Di y l hnh nh ca kt qu Stepping gi tr u ra.

Hnh 12: Kt qu Stepping thc hin Manual Stepping, ta lm nh sau: Chuyn sang vng hin th SOURCE . Nhn phm softkey STEP vo thit lp Stepping v ci t cc thng s nh sau :+ Gi tr Start + Gi tr End+ Step Mode: Eng. Units, Scale hoc Step Points+ Step Size (Scale or Count, ty theo la chn ca Step Mode)+ Trans Function: Linear hay Square Root Nhn phm softkey Done hay Enter hon thnh vic thit lp, sau thit b s t ng chuyn qua mn hnh ch Basic Mode. Nhn phm softkey Manual qua ch Manual Stepping v nhn Next tng bc thay i mc gi tr Nhn phm softkey Exit hay Esc thot ch Stepping thc hin Auto Stepping, ta lm nh sau: Chuyn sang vng hin th SOURCE. Nhn phm softkey STEP vo thit lp Stepping v ci t cc thng s nh sau :+ Gi tr Start + Gi tr End+ Step Mode: Eng. Units, Scale hoc Step Points+ Step Size (Scale or Count, ty theo la chn ca Step Mode)+ Trans Function: Linear hay Square Root Nhn phm softkey Done hay Enter hon thnh vic thit lp, sau thit b s t ng chuyn qua mn hnh ch Basic Mode. Nhn phm softkey Auto thc hin ch Stepping t ng. Nhn softkey lc ny chuyn sang PAUSE. tm dng ch t ng nhn PAUSE. Nhn softkey lc ny chuyn sang RESUME v ta c th tr li ch t ng bng cch nhn phm softkey ny. Nhn phm softkey Exit hay Esc thot ch Steppinge) Ramp gi tr u raCc i lng pht ra u c th thc hin Ramp gi tr tr xung v tn s. Trc khi thc hin Ramp, ta phi thit lp trong Ramp Setting bng cch nhn vo phm softkey Ramp, hp sau s hin ra.

Hnh 13: Ci t Ramp (Ramp Configuration)

Gi tr bt u khng c trng vi gi tr kt thc v khng c vt qu di u ra.Ch rng ch Ramp c theo mt sn ln hoc xung. V sn ln v xung l i xng. Trong trng hp gi tr bt u v kt thc l c nh th thi gian Ramp cng di, Ramp cng chm v kch thc tng bc cng nh. Di ca Ramp Time l 1~3600s.

Hnh 14: Kt qu Ramp gi tr u raThc hin cc bc nh sau Ramp kt qu u ra: Chuyn sang vng hin th SOURCE. Nhn phm softkey RAMP vo thit lp Rampping v ci t cc thng s nh sau:+ Gi tr Start+ Gi tr End+ Ramp Time: Rise Time/ Fall Time+Run Mode: Repeat or Single shot Nhn phm softkey Done hay Enter hon thnh vic thit lp, sau thit b s t ng chuyn qua mn hnh ch Basic Mode. Nhn phm softkey Start hay Enter bt u vic Ramp t ng. Nhn phm softkey lc ny l Pause. tm dng vic Ramp t ng, nhn Pause. Lc ny nhn phm softkey l Resume. Nhn Resume tr li vic Ramp t ng. Nhn Exit hay Enter thot ch Rampping.f) Ngun MilivoltThc hin cc bc sau to ngun Millivolts: Chuyn sang mn hnh SOURCE, n phm , s dng cc nt Up/Down ti i lng u tin trong danh sch la chn v ENTER xc nhn chuyn sang to ngun Millivolts. Nhn s bm trc tip hoc nhn phm la chn Option vo mc thit lp cc tham s v thc hin theo cc mc trn c c cc dng in p cn to.g) Ngun VoltTng t nh to ngun Millivolt, nhng trong danh sch la chn hin ra, ta chn mc th hai.h) Ngun xungThc hin cc bc sau to ngun xung: Chuyn sang mn hnh SOURCE, n phm , s dng cc nt Up/Down ti i lng th 4 trong list la chn v ENTER xc nhn. Nhn softkey Options vo mc thit lp cc tham s ca tn s pht ra. mc ny ta thay i c sn xung, bin v tn s xung. Tham kho cc mc 3.1, 3.2 la chn phng php thay i u ra m ta cn. Nhn phm softkey Start bt u pht xung v softkey lc ny chuyn sang Stop. Nu ta mun dng vic pht xung, nhn Stop.i) To gi tr in tr Thc hin cc bc sau to 1 gi tr in tr: Chuyn qua mn hnh SOURCE, n phm Nhn Up/Down la chn di pht ra (1400 hay 14000 c trong danh sch hin ra) v nhn Enter xc nhn. Tham kho cc mc 3.1, 3.2, 3.3, 3.4, 3.5 la chn phng php thay i u ra m ta cn.j) Ngun dng Thc hin cc bc sau to ngun dng: Chuyn qua mn hnh SOURCE, nhn phm S dng cc phm Up/Down la chn cc ch dng (Internal 24VDC loop power / External power). Nhn Enter xc nhn. Khi to dng in vi ngun trong (Internal power), ngun vng 24VDC phi c trng thi On. Nu khng n cng t ng c On khi ta chn ch ny. Tham kho cc mc 3.1, 3.2, 3.3, 3.4, 3.5 la chn phng php thay i u ra m ta cn.k) To ngun cp nhitTham kho bng 5 v cc kiu ngun cp nhit m thit b h tr.Thc hin qua cc bc sau to ngun cp nhit: Chuyn qua mn hnh SOURCE, nhn phm S dng cc phm Up/Down la chn mc u tin trong danh sch hin ln v nhn Enter hoc Done thc hin vic chuyn sang ngun cp nhit. Nhn phm la chn Option vo giao din cc thit lp ngun cp nhit, m trong ta c th chn kiu cm bin, n v nhit v phng php b lp tip gip tham chiu. Tham kho cc mc 3.1, 3.2, 3.3, 3.4, 3.5 la chn phng php thay i u ra m ta cn.l) To ngun RTDTham kho bng 6 v cc kiu ngun RTD m thit b h tr.Thc hin qua cc bc sau to ngun cp nhit: (cm bin nhit dng in tr RTDs) Chuyn qua mn hnh SOURCE, nhn phm S dng cc phm Up/Down la chn mc th hai trong danh sch hin ln v nhn Enter hoc Done thc hin vic chuyn sang ngun RTD. Nhn phm la chn Option vo giao din cc thit lp ngun RTD, m trong ta c th chn kiu cm bin v n v nhit. Tham kho cc mc 3.1, 3.2, 3.3, 3.4, 3.5 la chn phng php thay i u ra m ta cn.m) Ch Capture ch c bn, ta nhn nt SAVE thc hin bt im nh, khi nh c lu hon ton vo trong b nh th thit b s hin ra mt biu tng trn thanh trng thi, ng thi c ting bip pht ra.II. CI T V CC S DNG CP CAO thc hin cc ci t mang tnh h thng hay s dng cc tnh nng ca thit b, trn mn hnh ca ch c bn, ta nhn nt SETUP. Trang ci t hin ra, ta s dng cc phm di chuyn v ENTER vo cc mc ci t cn thit.

Hnh 15: Trang ci t1) Giao din RS232Khi ta mun kt ni thit b ti my tnh c nhn thng qua mt cng RS232, th ta phi la chn ng a ch v tc truyn. Phn a ch l ring bit v n l s c nh cho thit b m s dng giao thc cng ni tip truyn thng.2) Qun l nhnh l trng thi ca h thng ti mt thi im nht nh.Mt nh c cc thng tin sau: tn, gi tr o, gi tr pht, nhit b (i vi cp nhit), trng thi ngun vng v thi gian h thng.Thit b lu c 100 nh trong b nh v chng u hin th ra trong danh sch cc nh, ta ch vic nhn Enter hoc phm la chn Select ti nh m ta cn.3) Thi gianVo mc DATE TIME trong trang SETUP, ta c th chnh c thi gian ca h thng v nh dng hin th.4) Tnh nnga) CaculatorMc ny gip ta thc hin c cc chc nng tnh ton c bn.b) M phng b pht (Simulate Transmitter)Mt b pht l thit b c kh nng o cc tn hiu nhit , p lc, tn hiu inv pht ra c tn hiu in tng ng vi i lng o u vo.Thit b ny c kh nng thc hin c chc nng ca mt b pht. N c th o cc tn hiu RTD, Thermal Couple, tn s, in p, dng, in tr v p lc (nu c module km theo), ng thi a ra c tn hiu dng in p hoc mA.Trc khi thc hin tnh nng ny, ta phi m bo rng cc thit b ngoi sn sng. V d to mt b pht nhit RTD, ta lm nh sau: Chn i lng u vo v u ra. Chn di cho u vo, u ra. Chy m phng.Trong , trang i lng, ta chn RTD cho u vo v mA&24V cho u ra. Ta phi chn ng kiu cm bin, n v v cch kt ni cho RTD. trang di u vo, u ra, ta t di 02000C cho u vo v 420mA cho u ra. Ngoi ra ta cn la chn c kiu bin i l bc thang hay tuyn tnh (Linear/ Square Root)

Hnh 16: i lng m phng Hnh 17: Di m phngCh : trnh nhng nguy him c th xy ra cho thit b kt ni ti u ra ca thit b ny th ta phi hiu chnh di u ra m phng.c) To th vin RTDThit b ny c th o nhit vi hu ht cc RTD thng dng. Tuy nhin nu chng ta mun o nhit ca mt RTD khng theo tiu chun no hoc mt PRT tiu chun (standard Platinum Resistance Thermometers) th ta c th to b RTD tng ng.RTD c c chnh xc cao, cc h tiu chun cng nghip nh IEC hay ASTM a ra cng thc p dng sau cho mi quan h nhit - in tr:

Trong i vi cc RTD cng nghip th cc h s R0, A, B, C l cho trc. V d cho RTD Pt385 thng thng, c in tr l 100 00C v cc h s khc nh:

B o nhit in tr Platin tiu chunPhng th nghim hiu chun PRT ca tp on NIST thu c ITS-90 t im ba trng thi (TP) ca Argon (Ar TP, 189.3442 C) ti im ng bng (FP) ca Thy ngn (Ag FP, 961.78 C) cho vic hiu chun PRT.ITS-90 nh ngha nhit thng qua mt b cc thng s: cc im o nhit c nh, cc thit b ni suy v cc hm ton hc ni suy.Thit b ny s dng cc hm vi sai u v cui cho hiu chun SPRT. Nu ta s dng cc di nhit khc th cc tham s ci, bi s bng khng (i= 7, 8, 9, 10, 11)Bng sau th hin cc di nhit c hiu chun t phng th nghim ca NIST.Di nhit ()Cc im c nhHm vi sai

-189.34420.01Ar TP, Hg TP, TPW

029.7646TPW, Ga TP

0156.5985TPW, Ga TP,In FP

0231.928TPW, In FP, Sn FP

0419.527TPW, Sn FP, Zn FP

0660.323TPW, Sn FP, Zn FP, Al FP

Trn trang RTD, ta c th thc hin xa RTD hin ti bng cch nhn phm la chn DELETE hoc to li n bng cch nhn ENTER hoc phm la chn EDIT.Khi mt RTD c thm vo th vin thnh cng l ta c th s dng n thc hin php o.d) Tnh ton nhit B tnh ton nhit gip ta thc hin vic chuyn i gia cc gi tr nhit - in tr (RTD) hoc nhit -milivolt (Thermal Couple).La chn tnh ton nhit trong hp danh sch tnh nng Utilities, nhn phm ENTER hoc softkey SELECT, trang tnh ton nhit s m ra.Trn trang ny ta c th la chn c RTD hay TC trong danh sch loi cm bin. danh sch ny c hu ht cc loi cm bin, i vi RTD ngoi cc kiu cm bin c lit k trong bng 5, th cc kiu cm bin c to bi ngi dng (Custom RTD) cng c chp nhn.Ngoi ra, ta cng la chn c n v nhit cho chuyn i.Khi ta nhp vo mt gi tr nhit th in tr hoc in p tng ng s c t ng tnh ton. Qu trnh ngc li cng nh vy.e) Chuyn i n vThit b c kh nng chuyn i n v ca 04 i lng: Nhit , p lc, tiu hao dng chy v Lu lng dng chy.Khi thay i cc gi tr cn chuyn i th gi tr chuyn i cng lp tc c tnh ton.5) Cc thit lp h thnga) Thit lp cnh boTrn trang thit lp cnh bo s c la chn bt hoc tt ting bp mi khi c vt qu di o, vt qu di m phng Transmitter, vt qu di p lc.b) Thit lp mn hnhTrn trang ny ta c th chnh c sang mn hnh. Khi sng thp th tit kim c pin nhiu hn. Ngoi ra ta c th thit lp c thi gian t ng tt mn hnh khi khng c bt c thao tc no trn thit b trong mt khong t trc hoc chn khng bao gi tt mn hnh.c) T ng tt thit bTa c th thit lp thi gian t ng tt thit b hoc khng bao gi ging nh vic thit lp n sng mn hnh.Nu thit b kt ni ti my tnh th khng t ng tt c.d) Nng cp chng trnh c s (Upgrade Firmware) thc hin nng cp hoc cp nht chng trnh c s ca thit b, ta phi cho thit b kt ni ti my tnh v lm theo cc bc sau: Kt ni vi mt my tnh thng qua cng RS232. Nhp vo mt khu: 316. Nhn Enter v kim tra thit b ang trng thi ti xung. Chy chng trnh Magic Flash trn my tnh v thit lp cc thng s nh hnh thit b th hin. Chn file chng trnh c s v nhn Start. Sau khi thit b ti xung d liu xong, ta phi thc hin khi ng li.e) Ly li cc thit lp ban uTa c th khi phc li c cc thit lp ban u ca thit b nh khi va mi xut xng, tuy nhin ton b cc hnh nh c lu s b xa ht.f) Hiu chun h thng thc hin c chnh xc ca thit b khi o v khi pht, ta phi hiu chun li h thng theo cc bc sau: Nhp mt khu hiu chun: 316. Chn mc hiu chun trong danh sch hin ra: o, ngun v module p lc. Kt ni ti thit b c chnh xc cao hn v thc hin hiu chun tng bc.g) La chn ngn ng thun tin cho giao din ngi dng, ta c th la chn ngn ng hin th theo cc bc sau: Chn mc LANGUAGE trong trang SETUP. Nhn ENTER hoc SELECT. Chn ly ngn ng thch hp trong danh sch hin ra