Teledyne M300EM Fs, Voltage across, Resistor for 2-20mA, Resistor for 4-20mA, mVDC

Teledyne API – Technical Manual - Model 300E Family CO Analyzers Advanced Features

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 3-7for 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	Voltage across
	Resistor for 2-20 mA	Resistor for 4-20 mA
0	500 mVDC	1000 mVDC
100	5000 mVDC	5000 mVDC

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