Fluke 1560 Black Stack, Руководство пользователя

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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
0 to 1 M
Ω
Resistance accuracy, one-year
1
0 to 2k
Ω
2k to 100k
Ω
100k
Ω
to 1 M
Ω
0.1
Ω
50 ppm of reading
200 ppm of reading
Resistance accuracy, short-term
1, 2
0 to 2k
Ω
2k to 100k
Ω
100k
Ω
to 1 M
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