PCE Instruments PCE-ITM 20, User Manual

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© PCE Instruments
5
Other symbols
:
While testing the insulation resistance, the symbol “ ” flashes frequently if the voltage is over
30 V.
: While testing t
he insulation resistance, the symbol “ ” flashes frequently and the buzzer
warns continually if the outside voltage is over 30 V. T
he symbol “ ” is indicated while LOΩ≤35Ω
and the buzzer warns continuously.
LOCK
: Push down the “LOCK” button while you are testing the insulation resistance. The meter
will enter insulation resistance status and the symbol “ ” is indicated.
LOBAT
: The display shows “LOBAT” when the voltage drops below 7.5 V.
HOLD : The current value is held.
V,
MΩ, Ω
: The measured dimension units
3 Operation
Risk of electrocution. High-voltage circuits, both AC and DC, are very
dangerous and should be measured with great care.
• ALWAYS turn the function switch to the OFF position when the meter is not in use.
• If “OL” appears in the display during a measurement, the value exceeds the range you have
selected. Change to a higher range.
3.1 DC Voltage Measurements
Do not measure DC voltages if a motor on the circuit is being switched ON or
OFF. Large voltage surges may occur that can damage the meter.
• Set the function switch to the green VDC
position.
• Insert the black test lead banana plug into the negative
COM
jack. Insert the red test lead banana plug into the positive V
jack.
• Touch the black test probe tip to the negative
side of the
circuit. Touch the red test probe tip to the positive side of the
circuit.
• Read the voltage in the display.