Extech Instruments PRC50 User Manual page 15

6 Measurements
The calibrator measures DC voltage, DC current, frequency, and continuity.
Warning
In applications where the calibrator is used together with the supplied test lead cables for measurement, the allowable
voltage to ground of the input terminals is 60 V peak maximum. To avoid electrical shock, do NOT use the calibrator at
voltages exceeding the maximum voltage to ground.
Notes:
Using the〔HOLD〕key, the measured value can be frozen on the display.
The LCD shows all dashes (- - - - -) on the upper area when the range is changed by the user. If the input is over loaded
(over range), the measured value on the LCD indicates "oL".
6.1 Connecting Cables to Terminals
For DC voltage (mV) and continuity (Figure 8)
Step 1: Connect the black test lead cable for measurement to the "COM" input terminal and the red test lead cable to the
"mV" input terminal.
Step 2: Connect the other end of the cables to the terminal points of the equipment under test while ensuring that the
polarities are correct.
For DC Voltage (V) signal (Figure 9)
Step 1: Connect the black test lead cable for measurement to the "COM" input terminal and the red test lead cable to the
"VHz" input terminal.
Step 2: Connect the other end of the cable to the measuring terminals of the equipment under test while making sure the
polarities are correct.
Figure 8 - Measuring DC voltage and continuity
Figure 9 - Measuring DC Voltage and Frequency
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