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
Ω
. 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) 100Ω Platinum 0.003926Ω/°C -200 to 630
*Pt100 (385) 100Ω Platinum 0.00385Ω/°C -200 to 800
Ni120 (672) 120Ω Nickel 0.00672Ω/°C -80 to 260
Pt200 (385) 200Ω Platinum 0.00385Ω/°C -200 to 630
Pt500 (385) 500Ω Platinum 0.00385Ω/°C -200 to 630
Pt1000 (385) 1000Ω Platinum 0.00385Ω/°C -200 to 630
Cu10 (427) 9.035Ω ** Copper 0.00427Ω/°C -100 to 260
Pt100 (3916) 100Ω Platinum 0.003916Ω/°C -200 to 630
*Per IEC 751-Standard **10Ω @ 25°C
To Next Page
Loading...
