Using resistance-temperature detectors (rtds) – Martel Electronics MasterCAL User Manual
Page 47
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 14. 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
Ω
Platinum
0.003926
Ω
/
°
C
-200 to 630
*Pt100 (385)
100
Ω
Platinum
0.00385
Ω
/
°
C
-200 to 800
Ni120 (672)
120
Ω
Nickel 0.00672
Ω
/
°
C
-80 to 260
Pt200 (385)
200
Ω
Platinum
0.00385
Ω
/
°
C
-200 to 630
Pt500 (385)
500
Ω
Platinum
0.00385
Ω
/
°
C
-200 to 630
Pt1000 (385)
1000
Ω
Platinum
0.00385
Ω
/
°
C
-200 to 630
Cu10 (427)
9.035
Ω
**
Copper
0.00427
Ω
/
°
C
-100 to 260
Pt100 (3916)
100
Ω
Platinum
0.003916
Ω
/
°
C
-200 to 630
*Per IEC 751-Standard **10
Ω
@ 25
°
C