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Thermal Conductivity Analyzer
CAUTION: Do not touch the thermistor probe with the iron. The
end of the probe is tied and taped to the sample tubing
below the cell cover. If the meter reading suddenly
drops to zero, remove the soldering iron immediately.
After the area around the thermistor cools, the voltage
across the heater resistors should again climb to 47
volts. Such action indicates a properly functioning
heater circuit. If the meter stays in the 47 volt region,
the circuit card will have to be replaced.
7.0
SERIAL NUMBER: 195929
7.1
The ranges of the analyzer are:
Range Switch Position #1:
Range Switch Position #2:
Range Switch Position #3:
24
CALIBRATION DATA FOR MODEL 212R
Ranges.
Teledyne Analytical Instruments
0-50,000 ppm N
in H
2
0-5000 ppm
N
in H
2
2
0-500 ppm
N
in H
2
2
Model 212R
2
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