Fluke 744 [47/138] Documenting process calibrator using measure mode

Fluke 744 [47/138] Documenting process calibrator using measure mode
Documenting Process Calibrator
Using Measure Mode
37
Using Resistance-Temperature Detectors
(RTDs)
The calibrator accepts RTD types shown in Table 6.
RTDs are characterized by their resistance at 0 °C
(32 °F), which is called the “ice point” or R
0
. The
most common R
0
is 100. Most RTDs come in a
three-terminal configuration. The calibrator accepts
RTD measurement inputs in two-, three-, or four-wire
connections as shown in Figure 15. A four-wire
configuration provides the highest measurement
precision, and two-wire provides the lowest
measurement precision.
Table 6. RTD Types Accepted
RTD Type Ice Point (R
0
) Material α Range (°C)
Pt100 (3926) 100 Platinum 0.003926 /°C -200 to 630
*Pt100 (385) 100 Platinum 0.00385 /°C -200 to 800
Ni120 (672) 120 Nickel 0.00672 /°C -80 to 260
Pt200 (385) 200 Platinum 0.00385 /°C -200 to 630
Pt500 (385) 500 Platinum 0.00385 /°C -200 to 630
Pt1000 (385) 1000 Platinum 0.00385 /°C -200 to 630
Cu10 (427) 9.035 ** Copper 0.00427 /°C -100 to 260
Pt100 (3916) 100 Platinum 0.003916 /°C -200 to 630
*Per IEC 751-Standard **10 @ 25 °C

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