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: >10W and <10KW: 15ppm/ºC
<10W or >10KW: 25ppm/ºC
over an ambient temperature range of 25ºC± 5ºC.
DC Offset Current: <8nA by active cancellation.
Resistance Range: 0.5W to 1.0MW.
Resistance 10mV 3.0mV 1.0mV 300µV
Maximum
1.0MW 100KW 100KW 33KW
Minimum
1W 0.5W 0.5W 0.16W
Table 7: Minimum and Maximum Resistance vs. Bias Voltage
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