Cryo-con Model 24C
Specifications, Features and Functions
Thermocouple Sensors
Thermocouple devices are supported by using an optional external module.
Measurement Drift:
25ppm/ºC
Input
Range:
±70mV
Accuracy:
±1.0µ V ± 0.05%.
Resolution:
0.0003%
Installed Types:
K, E, T and Chromel-AuFe (0.07%).
Input Connector:
Isothermal, Screw-type terminals.
NTC Resistor Sensors
Type:
Constant-Voltage AC resistance bridge with excitations
of 10mV, 3.0mV, 1.0mV and 300µV RMS. Fixed or auto-ranged.
Excitation Current:
2.5mA to 10nA.
Four ranges of 2.5mA, 250uA and 25uA full-scale.
Excitation Frequency:
7.5Hz bipolar square wave.
Drift:
>10
W
and <10K
W:
15ppm/ºC
<10
W
or >10K
W:
25ppm/ºC
over an ambient temperature range of 25ºC± 5ºC.
DC Offset Current
: <8nA by active cancellation.
Resistance Range:
0.5
W
to 1.0M
W
.
Resistance
10mV 3.0mV 1.0mV
300µV
Maximum
1.0M
W
100K
W
100K
W
33K
W
Minimum
1
W
0.5
W
0.5
W
0.16W
Table 7: Minimum and Maximum Resistance vs. Bias Voltage
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