Amprobe Telaris-ISO-PRO Insulation-Tester - Manual (Page 21)

AC/DC Voltage Measurement
Connected loads generating EMV disturbance or harmonic waves may impair the display
quality.
1) Select the ”UAC/DC" measurement range using the measurement function selection
dial (19).
2) Connect the red test lead to the "UAC/DC" socket and the black test lead to the
"COM" socket.
3) Connect the test leads to the UUT.
4) Select between AC or DC voltage pressing the ”AC/DC" key (17).
• When switching on or changing to the "UAC/DC" measurement function, the default
setting is always "AC".
5) Read the measurement result on the display screen.
Overvoltage Protection for Voltage Measurement
If a external voltage of maximum 600 V AC/DC is connected by mistake to the UAC/DC
measurement socket, ISO-PRO will not be damaged. The instrument displays ">600V”. After
removal of the overvoltage wait for approx. 20 s to obtain correct measurement values.
• If an AC voltage >25 V is measured within the DC voltage range, the instrument displays
"Uext”.
• This is also valid for the AC range if measuring a DC voltage > 25 V.
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