Analog outputs: current loop – Teledyne GFC-7000T - Trace CO2 Analyzer - manual User Manual
Page 265
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