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Teledyne API – Technical Manual - Model 300E Family CO Analyzers Advanced Features
141
An alternative method for measuring the output of the Current Loop converter is to connect a 250 ohm 1%
resistor across the current loop output in lieu of the current meter (see Figure 3-7 for pin assignments and
diagram of the analog
output connector). This allows the use of a voltmeter connected across the resistor to
measure converter output as VDC or mVDC.
V
+DC Gnd
Figure 7-7: Alternative Setup Using 250Ω Resistor for Checking Current Output Signal Levels
In this case, follow the procedure above but adjust the output for the following values:
Table 7-9: Current Loop Output Check
% FS
Voltage across
Resistor for 2-20 mA
Voltage across
Resistor for 4-20 mA
0 500 mVDC 1000 mVDC
100 5000 mVDC 5000 mVDC
04288D DCN5752