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GMC-I Messtechnik GmbH 7
4Operation
4.1 Voltage Measurement
Attention!
!
Before connecting the measuring instrument to an external
source of voltage, make sure that the battery compartment
has been correctly secured to the housing because the
battery connector terminals are electrically connected to the
measuring circuit!
No auxiliary power is required for voltage measurement, i.e. no
batteries need to be inserted into the battery compartment.
Direct and alternating voltages of up to 500 V can be measured
without switching between zero-frequency and periodic quantities.
Pointer deflection is always positive for the measurement of direct
voltage, regardless of polarity.
Devices under test can be conveniently tested for absence of voltage
using the voltage measuring function without activating any of the
controls. Immediately after connecting the device under test, the
instrument indicates whether or not external voltage is present.
The voltage measuring range can also be used for discharging
capacitive devices under test. The falling voltage value can be
observed at the display.
Adhere to the prescribed sequence for the performance of voltage
measurement:
Ð Set the rotary switch (3) to the xxx V position.
The rotary switch may be set to any position other than Ω!
Ð Leave the toggle switch (4) in its neutral position (do
not press).
Ð Contact the device under test with the test probes
(1 and 8). Read the measured value from the voltage
scale within a range of 0 to 500 V.
Ð End the measurement by removing the test probes from the
device under test.
Ω
500 V
250 V
100 V
Ω
MΩ
V
– (+)
~
+ (–)
~
7


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