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3. Putting into operation
The measuring instrument is delivered ready for
operation with a 9 V block IEC 6 LR 61 battery. Before
initial start-up, or after a period of storage, observe
the instructions in section 5.
Start-up:
short press on button
(display “+1“ and LED in the middle). A displayed
“+1“ signalizes readiness for measurement.
Shut-off:
press button
once more
The measuring instrument is switched off
automatically, if no key activation has occurred
for about 20 seconds.
Self-test:
press constantly button
while switching on
the device.
The device operates correctly when:
- all LCD segments light up,
- 4 LEDs flash,
- an acoustic signal occurs,
- while releasing the button, “+1“ appears on the
display
- the LED in the center flashes
When the display fails during selftests (complete-
ly or partly) or when the device does not
signalize function standby, you may not use the
EP 4 any longer. It has to be send in for repairs.
When the display shows the error message
“FUSE Err“, then the device is no longer ready for
operation. The overvoltage protection has to
be exchanged by the manufacturer of the device.
Battery-test:
When an empty battery symbol occurs perma-
nently on the display, the battery needs to be
exchanged (see 5.).
4. Measuring and testing
4.1 General information
Button functions:
switch on/off, self-test (3)
zero balance (4.3)
measuring (4.4)
zero balance (4.3)
change of polarity (4.5)
automatic service (4.6)
measured value retrievable (4.6)
If the instrument comes into contact with a
voltage of over 15 V in its switched-on condition,
an acoustic, as well as an optical warning, is
generated (see 4.7).
No measurements may be made at this conduc-
tor until it is made voltage-free.
Use the shock-proof plug (IP 2x with shrouded
contacts) for the socket of the EP 4, when you
test at measuring points where voltages can
occur.
Do not change the battery in Ex-areas.
+/-
