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5 Temperature Measurement

5.1 Using Thermocouples (TC)

The calibrator supports ten standard thermocouples, including type E, N, J, K, T, B, R, S,
L, or U. Lower table summarizes the ranges and characteristics of the supported
thermocouples.

Type

Positive Lead Material

Negative Lead Material

Specified Range

（℃）

Chromel

Constantan

-200

～

950

Ni-Cr-Si

Ni-Si-Mg

-200

～

1300

Iron

Constantan

-200

～

1200

Chromel

Alumel

-200

～

1370

Copper

Constantan

-200

～

400

Platinum (30% rhodium)

Platinum (6% rhodium)

600

～

1800

Platinum (13% rhodium)

Platinum

-20

～

1750

Platinum (10% rhodium)

Platinum

-20

～

1750

Iron

Constantan

-200

～

900

Copper

Constantan

-200

～

400

To measure temperature using a thermocouple, proceedas follows:
1.

Connect the thermocouple to the calibrator as shown in Figure 5.1-1:

Содержание ET2725A

Страница 1: ...ET2725A Multifunction Process Calibrator ET2725B Multifunction Process Calibrator Users Manual Hangzhou Zhongchuang Electron Co Ltd...

Страница 2: ...3 3 Current Measurement with Loop Power 9 3 4 Resistance measure and continuity test 10 4 Functions of Lower Display 11 4 1 Measure and Source of DC V and DC mV 11 4 2 DC mA Measurement 11 4 3 DC mA S...

Страница 3: ...tage Measurement 28 9 2 DC Voltage Source 28 9 3 DC mA measurement 29 9 4 DC mA source 29 9 5 Resistance Measurement upper display 29 9 6 Resistance measurement lower display 30 9 7 Resistance source...

Страница 4: ...d end temperature compensation for TC Manual stepping and automatic stepping and ramping Super strong protection The waterproof grade is IP67 Automatic protection against the signal terminals connect...

Страница 5: ...ance and supplying loop power The two terminals electrical isolate from the other terminals Measure and Source V mV Hz TC and RTD terminals Terminals for sourcing or measuring voltage resistance frequ...

Страница 6: ...er display 5 Turns backlight on or off Turns Contrast Adjust mode on when powering up 6 Selects DC mV or resistance measurement function in the lower display 7 Selects the range of source function in...

Страница 7: ...16 Cycles the calibrator through MEASURE and SOURCE modes in the lower display 17 Selects TC thermocouple measurement and sourcing function in the lower display Repeated pushes cycle through the therm...

Страница 8: ...1825 Proceed as follows to perform a voltage to voltage test 1 Connect the calibrator s the voltage output to its voltage input as shown in Figure 2 1 1 Figure 2 1 1 2 Press more than 2 seconds to tu...

Страница 9: ...en The screen will display as shown in Figure 2 1 5 Figure 2 1 5 6 Press or to increase or decrease 1 of the number that locates at the line the number automatic carry but the position of the line hav...

Страница 10: ...t key was pressed To disable the Shut Down mode press and simultaneously To enable the mode press and simultaneously To adjust the time duration press and simultaneously the screen will display as sho...

Страница 11: ...s and to adjust the brightness of backlight 3 Press to save brightness level will appear and then the calibrator will enter into the work mode Without pressing any key for 5 seconds the calibrator wil...

Страница 12: ...sign should not be displayed and connection is same to that of DC V measurement 3 3 Current Measurement with Loop Power The loop power function activates a 24 V supply in series with the current meas...

Страница 13: ...ntinuity test Press to select resistance measurement or continuity test function circularly with the unit of and the connection is the same as DC V measurement In the continuity test function the buzz...

Страница 14: ...The lower display default function is DC V measurement after trun on If necessary press or to select DC V or DC mV function and press to switch measure and source mode The connection is shown in Figu...

Страница 15: ...calibrator can implement current output The connection is shown in Figure 4 3 1 Figure 4 3 1 When the output load is too heavy sign will appear in the display as shown in Figure 4 3 2 and at the same...

Страница 16: ...which the calibrator is connected into a loop in place of a transmitter and supplies a known settable test current Proceed as follows 1 Connect the 24 V loop power source as shown in Figure 4 4 1 2 I...

Страница 17: ...Attention Over range indicate when the connection open Resistance measurement supports the connection types of two wire three wire and four wire The calibrator can be switched to three wire or four w...

Страница 18: ...rement Press to switch resistance output range Resistance source includes 400 range and 3200 range as shown in Figure 4 5 3 and Figure 4 5 4 Figure 4 5 3 Figure 4 5 4 Attention The Figure 4 5 3 is 400...

Страница 19: ...ess to select frequency its unit is The connection is same to DC V measurement Press to select source range The screen will display as shown in Figure 4 6 2 Figure 4 6 2 Attention The left is of 200 0...

Страница 20: ...erial Specified Range E Chromel Constantan 200 950 N Ni Cr Si Ni Si Mg 200 1300 J Iron Constantan 200 1200 K Chromel Alumel 200 1370 T Copper Constantan 200 400 B Platinum 30 rhodium Platinum 6 rhodiu...

Страница 21: ...2 Press to select mode 3 Press for the TC display If desired continue pressing this key to select the desired thermocouple type as shown in Figure 5 1 2 Figure 5 1 2 4 Press to display the DC mV value...

Страница 22: ...tion If you need further view current automatic cold end temperature compensation value you have to operation key Reading as shown in Figure 5 1 1 1 after press key the sign is replaced for current au...

Страница 23: ...key return to automatic compensation 5 2 Using Resistance Thermometer Detector RTD The calibrator accepts RTD types of Pt100 Pt1000 Cu50 and Cu100 The calibrator accepts RTD measurement inputs in two...

Страница 24: ...mode 2 Press for the RTD display If desired continue pressing this key to select the desired RTD type 3 The calibrator can detect the connecting type automatically and you can Press or to select a 2...

Страница 25: ...nect the thermocouple to the TC input output plughole of the calibrator 2 If necessary press to select mode 3 Press for the TC display If desired continue pressing this key to select the desired therm...

Страница 26: ...panel To be connected to a third wire or Fourth wire transducer folding cable can be sued to used as extra wiring 1 If necessary press to select mode 2 Press for the RTD display If desired continue pr...

Страница 27: ...ncy 20 kHz 0 000 kHz 20 000 kHz TC J model 0 0 1000 0 TC K model 0 0 1000 0 TC T model 0 0 400 0 TC E model 0 0 800 0 TC R model 0 1500 TC S model 0 1500 TC B model 600 1800 TC N model 0 0 1000 0 Pt10...

Страница 28: ...r working modes recover to DC V measurement function Automatic shutdown time is reset to be 30 min and becomes effective LCD backlight brightness is reset to be 60 Output range is recovered to be fact...

Страница 29: ...n parameters by pressing and keys Enter these parameters by pressing and holding and For more information on 5 setting parameters see Setting 0 and 100 earlier in this manual 6 Perform test checks at...

Страница 30: ...ointed at the remaining electric quantity is less than 20 Charge is necessary for normal operation of the calibrator The LCD backlight will start operation and the will display on the screen when the...

Страница 31: ...0 001mV 0 05 20 0 025 20 200mV 200mV 0 01mV 0 05 2 0 025 2 50V lower display 1V 60V 0 001V 0 05 2 0 02 2 100mV lower display 15mV 80mV 0 001mV 0 05 20 0 02 20 80mV 125mV 0 01mV 0 05 2 0 02 2 10 18 28...

Страница 32: ...0 005 FS Input resistance 100 9 4 DC mA source Range Maximum output range Resolution Accuracy of reading counts ETX 1825 ETX 2025 20mA 0 24mA 0 001mA 0 05 2 0 02 2 20mA Transducer simulation 0 24mA 0...

Страница 33: ...400 0 440 0 01 0 25 0 15 0 15 0 10 3200 420 3600 0 1 1 5 1 0 1 0 0 5 10 18 28 55 temperature coefficient 0 005 FS Exciting current during measurement 400 0 4mA 10 3200 0 2mA 10 Two wire Does not inclu...

Страница 34: ...ave 5 counting points should be added to errors of other wave forms Commercial frequency can be measured directly 9 9 Frequency source Range Maximum output range Resolution Accuracy of reading counts...

Страница 35: ...re RTD Graduation Range Resolution Accuracy ETX 1825 ETX 2025 2 wire 3 wire 4 wire Output 2 wire 3 wire 4 wire Output Pt100 200 850 0 1 0 7 0 4 0 7 0 4 0 3 0 3 Pt1000 200 650 0 4 0 3 0 3 0 3 0 15 0 15...

Страница 36: ...calibrator also includes the following hard spot test leads two sets alligator clips two sets One 12V 1A power adaptor ETX 2025 ETX 1825 Users Manual Figure 10 1 1 10 2 Optional Accessories 6 R03 mode...

Страница 37: ...aged test line before using Do not touch the metal contact when the detector is used Connect the common line and then electric test line As for wire removal electric test line should be removed first...

Страница 38: ...gchuang Electron Co Ltd Phone 0086 571 56770221 Fax 0086 571 56861355 Website Http www east tester com E mail sales east tester com Zip Code 310015 Address No 3 Kangle Road Gongshu District Hangzhou Z...

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