Temperature - Fluke 8508A Service Manual

Temperature

Absolute Resistance
Measurement Uncertainty
Resistance Range
365 day Tcal ±1 °C
±(ppm Reading + m )
95% Confidence Level
0 - 199.990 000
200 - 1999.900 00
99% Confidence Level
0 - 199.990 000
200 - 1999.900 00
Temperature Readout (Secondary Specifications)
Transfer Uncertainty
Resistance Range
±(ppm Reading + m )
0 - 199.990 000
200 - 1999.900 00
Type ....................................................................... 4-wire current reversal resistance measurement with readout of
Temperature Range .............................................. -200 °C to 660 °C, readout also available in °F or K.
Linearization ......................................................... ITS-90 or Callendar van Dusen. Entry and storage of coefficients and
Current Source ..................................................... 1 mA
Temperature Readout
Typical Equivalent Temperature Measurement Uncertainty
[4]
[11]
7.5 + 0.14
25
25
25
100
100
100
7.5 + 0.5
100
9.5 + 0.18
25
25
25
100
100
100
9.5 + 0.6
100
Resistance Measurement Uncertainty
20 Minute ±1 °C
[11]
0.8 + 0.14
0.2 + 0.5
equivalent temperature. 2-wire and 3-wire selectable without current
reversal. Refer to Resistance specifications for additional details.
nominal resistance for up to 100 probes.
Introduction and Specifications
[1] [2] [3]
Nominal
Probe Type

Temperature

(°C)
-200
PRT/SPRT
0
PRT/SPRT
660
PRT/SPRT
-200
PRT/SPRT
0
PRT/SPRT
232
PRT/SPRT
400
PRT/SPRT
-200
PRT/SPRT
0
PRT/SPRT
660
PRT/SPRT
-200
PRT/SPRT
0
PRT/SPRT
232
PRT/SPRT
400
PRT/SPRT
[1] [2] [3]
2-Wire 3-Wire
Adder Adder
15 °C - 30 °C
( ) ( )
0.1 0.005
0.1 0.005
Specifications
Resistance
Accuracy
( ) ± (°C)
5 0.0085
25 0.0035
84 0.0025
20 0.0035
100 0.0025
185 0.0020
250 0.0025
5 0.0010
25 0.0040
84 0.0025
20 0.0040
100 0.0025
185 0.0020
250 0.0025
Temp Coeff. ± ppm Reading/°C
5 °C - 15 °C
30 °C - 40 °C
0.6 1.0
0.5 0.8
1
[12]
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