4.2 Testing voltage and polarity
Attention!
Connect the voltage measurement tips to the
7-pin universal connector only when the device is
switched-o. Switch-on the device not until they are
locked and select rang if necessary.
Put both test prods with safe contact onto the
metering point and the voltage value is indicated
in the lower display line.
At a voltage of 12 V ashes the red LED and button
functions are locked.
Notes:
- If Hold appears permanently, probably the tip
has been attached when the device was switched-
on. Switch METRALINE EXM25 o and on.
- Because of integrated multipliers the device indi-
cates few mV while in open-circuit operation, this
has no inuence on the result of measurement.
- The METRALINE EXM25 casing is made of
conductive material. We recommend unearthed
operation for precise voltage measurments
>100 Hz. Avoid contact with grounded parts, e.g.
control cabinet. For this purpose, the use of a
leather bag should be preferred.
1000 V voltage range (1000 V)
The voltage range adjusts automatically to the
used DATA-HOLD measurement tip EXM 72010.
The measurement range serves for a fast detection
of measurement values between 0 to 1000 V
without decimal places.
The display range of the METRALINE EXM25 extends
to 1160 V AC / 1610 V DC with EXM 72010.
Observe the safety precautions (see section 2) for
Ex-areas.
Automatic voltage range (AuTo)
The voltage range adjusts automatically to the used
voltage measurement tip EXM 72010.
The measurement range serves for a fast detection
of measurement values between 1 mV – 1000 V, the
optimal measurement range is selected automati-
cally.
Indication of polarity
Type of voltage is indicated by the symbols
~ and – . Direct voltage: is minus applied to the test
prod with Hold button, the leading sign „-“ appears,
is plus applied, no leading sign appears in front of
the indicated value.
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