Fluke 1560 Black Stack, Руководство пользователя

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11 2564 Thermistor Scanner Module
This section explains the features and operation of the optional 2564 Thermis-
tor Scanner Module.
11.1 Description
The 2564 Thermistor Scanner Module is an add-on module that allows the
1560 to measure temperature with up to eight thermistors. It accepts nearly ev-
ery type of thermistor sensor with either two, three, or four wires. It uses very
small excitation currents to minimize sensor self-heating. The excitation current
alternates polarity to minimize the effects of thermoelectric offsets. Up to eight
sensors can be connected to the 2564 simultaneously and measured alternately.
11.2 Specifications
Resistance range
0 to 1 M
Ω
Resistance accuracy, one-year 1
0 to 2 k
Ω
2 to 100 k
Ω
100 k
Ω
to 1 M
Ω
0.2
Ω
100 ppm of reading
300 ppm of reading
Resistance accuracy, short-term 1, 2
0 to 2 k
Ω
2 to 100 k
Ω
100 k
Ω
to 1 M
Ω
0.15
Ω
75 ppm of reading
250 ppm of reading
Temparature accuracy, one-year (with 10k
Ω
,
α
=0.04 sensor;
not including sensor uncertainty) 1
0°C
25°C
50°C
75°C
100°C
±0.0025°C
±0.0025°C
±0.0025°C
±0.003°C
±0.006°C
Temperature coefficient 2.5 ppm/°C
Excitation current
2, 10
μ
A; automatically selected: 1 Hz
Maximum lead resistance
100
Ω
Sample time 2 seconds
Number of channels 8
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 2.5 lbs. (1.1 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.
2
Short-term accuracy includes nonlinearity and noise uncertainties. It does not include drift or calibration
uncertainties.
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11 2564 Thermistor Scanner Module
Description