Martel Electronics BetaGauge 321A - Manual (Page 17)

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Figure 6
4. Measuring Current
To measure current use the input terminals in the front of the calibrator. Select the mA
function on one of the displays. Current is measured in mA and percentage of range.
The range on the calibrator is set to 0% at 4 mA and 100% at 20 mA.
Note: The display will indicate “OL” when the measured current exceeds the nominal
range of current measurement (24 milliAmps).
For example:
If the current measured is displayed as 75% then the mA value is 16 mA.
Figure 7