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
0to1M
Ω
Resistance accuracy, one-year
1
0to2k
Ω
2k to 100k
Ω
100k
Ω
to1M
Ω
0.1
Ω
50 ppm of reading
200 ppm of reading
Resistance accuracy, short-term
1, 2
0to2k
Ω
2k to 100k
Ω
100k
Ω
to1M
Ω
0.08
Ω
40 ppm of reading
180 ppm of reading
Temperature accuracy (with 10k
Ω
,
α
=0.04 sensor; not includ
-
ing sensor uncertainty)
1
0°C
25°C
50°C
75°C
100°C
±0.0013°C
±0.0013°C
±0.0013°C
±0.0015°C
±0.003°C
Temperature coefficient
1
2.5 ppm/°C
Excitation current
2.0,10.0
μ
A; automatically selected; 1
Hz.
Maximum lead resistance
100
Ω
Sample time 2 seconds
Number of channels 2
Recommended operating temperature range
1
18 to 28°C (64 to 82°F)
Absolute operating temperature range 5 to 35°C (40 to 95°F)
Weight 2 lbs. (0.9 kg.)
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.
133
10 2563 Thermistor Module
Description