Loop Power Supply; Rtd Excitation (Simulation); Temperature, Rtd Ranges, And Accuracies (Its-90) - Fluke 725 User Manual

Loop Power Supply

Voltage: 24 V
Maximum current: 22 mA
Short circuit protected

Temperature, RTD Ranges, and Accuracies (ITS-90)

Type Range C
Ni120 -80 to 260
Pt100-385 - 200 to 800
Pt100-392 -200 to 630
Pt100-JIS -200 to 630
Pt200-385 -200 to 250
250 to 630
Pt500-385 -200 to 500
500 to 630
Pt1000-385 -200 to 100
100 to 630
Resolution: 0.1 C, 0.1 F
Allowable excitation current (source): Ni120, Pt100-385, Pt100-392, Pt100-JIS, Pt200-385: 0.15 to 3.0 mA
Pt500-385: 0.05 to 0.80 mA; Pt1000-385: 0.05 to 0.40 mA
RTD Source: Addresses pulsed transmitters and PLCs with pulses as short as 5 ms.
* 2-wire: Does not include lead resistance.
3-wire: Assumes matched leads with a total resistance not exceeding 100

RTD Excitation (simulation)

Ni 120
Pt 100-385
Pt 100-392
Pt 100-JIS
Pt 200-385
Pt 500-385
Pt 1000-385
Measure 4-Wire C Measure 2- and 3-Wire* C
0.2
0.33
0.3
0.3
0.2
0.8
0.3
0.4
0.2
0.2
Allowable Excitation by RTD type
0.15 to 3.0 mA
0.15 to 3.0 mA
0.15 to 3.0 mA
0.15 to 3.0 mA
0.15 to 3.0 mA
0.05 to 0.80 mA
0.05 to 0.40 mA
Accuracy
0.3
0.5
0.5
0.5
0.3
1.6
0.6
0.9
0.4
0.5
.
Specifications
Source C
0.2
0.33
0.3
0.3
0.2
0.8
0.3
0.4
0.2
0.2
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