Teledyne GFC-7001T - Trace CO Analyzer - Manual (Page 277)

Troubleshooting and ServiceTeledyne API – Model T300/T300M CO Analyzer
Teledyne Analytical Instruments 277
Table 12-10: Analog Output Test Function - Nominal Values Voltage Outputs
FULL SCALE OUTPUT OF VOLTAGE RANGE
(see Section 5.9.3.1)
100MV 1V 5V 10V
STEP % NOMINAL OUTPUT VOLTAGE
1 0 0 0 0 0
2 20 20 mV 0.2 1 2
3 40 40 mV 0.4 2 4
4 60 60 mV 0.6 3 6
5 80 80 mV 0.8 4 8
6 100 100 mV 1.0 5 10
For each of the steps the output should be within 1% of the nominal value listed in the
table below except for the 0% step, which should be within 0mV ±2 mV. Make sure
you take into account any offset that may have been programmed into channel (see
Section 5.9.3.9).
If one or more of the steps fails to be within these ranges, it is likely that there has been
a failure of either or both of the DACs and their associated circuitry on the motherboard.
To perform the test connect a voltmeter to the output in question and perform an analog
output step test as follows: