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Troubleshooting Model GFC7000TA Carbon Dioxide Analyzer
Teledyne Analytical Instruments 247
Table 10-10: Analog Output Test Function - Nominal Values Voltage Outputs
FULL SCALE OUTPUT VOLTAGE
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
10.5.8.3. Analog Outputs: Current Loop
To verify that the analog outputs with the optional current mode output are working properly, connect a
250 ohm resistor across the outputs and use a voltmeter to measure the output as described in Section
6.9.4.2 and then perform an analog output step test as described in Section 6.9.3.
For each step the output should be within 1% of the nominal value listed in the table below.
Table 10-11: Analog Output Test Function - Nominal Values Current Outputs
OUTPUT RANGE
2 -20 4 -20
NOMINAL OUTPUT VALUES
STEP % CURRENT V(250 OHMS) CURRENT V(250 OHMS)
1 0 2 mA 0.5V 4 1
2 20 5.6 1.4 7.2 1.8
3 40 9.2 2.3 10.4 2.6
4 60 12.8 3.2 13.6 3.4
5 80 16.4 4.1 16.8 4.2
6 100 20 5 20 5