Amprobe GP-1 Earth-Tester-Ground-Probe - Manual (Page 15)

Voltage Measurement
1) Insert the test leads into C1 and C2.
2) Move the function switch to Voltage.
3) Turn the GP-1 ON.
4. Test for AC voltage.
Warning: Do not attempt measurement of voltages above 600
VAC or circuit damage and/or electric shock may result. Voltage
measurement must be made with test leads in C1 and C2 with the
function switch in the voltage position only.
Page 15
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