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10
2563 Thermistor Module
This section explains the features and operation of the optional 2563 Thermis-
tor Module.
10.1
Description
The 2563 Thermistor Module is an add-on module that allows the 1560 to mea-
sure temperature with thermistor sensors. It is capable of measuring tempera-
ture with very high accuracy, to 0.0013°C. It accepts nearly every type of
thermistor sensor, two or four-wire. It uses very small excitation currents to
minimize sensor self-heating. The excitation current alternates polarity to mini-
mize the effects of thermoelectric offsets. Two thermistor sensors can be con-
nected to the 2563 simultaneously and measured alternately.
10.2
Specifications
Resistance range
Resistance accuracy, one-year
0 to 2kΩ
2k to 100kΩ
100kΩ to 1 MΩ
Resistance accuracy, short-term
0 to 2kΩ
2k to 100kΩ
100kΩ to 1 MΩ
Temperature accuracy (with 10kΩ, α=0.04 sensor; not includ-
ing sensor uncertainty)
0°C
25°C
50°C
75°C
100°C
Temperature coefficient
Excitation current
Maximum lead resistance
Sample time
Number of channels
Recommended operating temperature range
Absolute operating temperature range
Weight
1
The accuracy specifications apply within the recommended operating temperature range. Accuracy limits
are increased by a factor of the temperature coefficient outside this range.
1
1, 2
1
1
1
10 2563 Thermistor Module
Description
0 to 1 MΩ
0.1Ω
50 ppm of reading
200 ppm of reading
0.08Ω
40 ppm of reading
180 ppm of reading
±0.0013°C
±0.0013°C
±0.0013°C
±0.0015°C
±0.003°C
2.5 ppm/°C
2.0,10.0 μA; automatically selected; 1
Hz.
100Ω
2 seconds
2
18 to 28°C (64 to 82°F)
5 to 35°C (40 to 95°F)
2 lbs. (0.9 kg.)
133
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