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At room temperature, the service life of the battery is about eight years; at an ambient temperature of 60 °C this
reduces to about three years.
After battery replacement, the cover must be closed so that the tabs snap into place before the instrument is
switched on again.
Once the new battery is fitted, the EM-PQ 2300 internal clock must be reset using the FRAKO configuration
software Device Manager. The procedure for doing this is described in the Device Manager online Help.
9.3 Fuse
DANGER!
The following instructions must be observed to avoid danger to life and limb:
During installation work or servicing, or when the internal fuse is to be replaced, the
instrument and the connecting cables must be isolated from the power supply.
The isolated electrical system must be locked out to prevent its being inadvertently
switched on again.
The immediate vicinity must be screened off.
It must be verified that none of the connections are live!
When work is carried out on the instrument terminals and connecting cables, there is a risk of live
components being touched inadvertently. The working voltage may present a hazard to health or
may even be life-threatening.
Observing the above safety precautions can significantly reduce the risk to life and limb.
An internal fuse is fitted in the EM-PQ 2300. It is mounted in a fuseholder underneath the hinged cover printed
with the instrument name. This cover can be opened downwards once the four tabs at the top edge of the cover
have been carefully released.
If the fuse needs to be replaced, the replacement fuse must have the following
specifications
:
Slow-blow, surge-proof fuse 2 A, 250 V AC, clearing I²t approx. 92.7 A²s, melting time at 10
×
I
n
at least
20 ms and no more than 300 s, size 5 x 20 mm
DANGER!
The following instructions must be observed to avoid danger to life and limb or damage to
equipment and other assets:
The fuse may only be replaced by the type specified above.
The clearing I²t rating must not be less than specified above, and the melting time at an
overcurrent of 10
×
I
n
must be within the limits stated.
When work is carried out on the instrument terminals and connecting cables, there is a risk of live
components being touched inadvertently. The working voltage may present a hazard to health or
may even be life-threatening.
Observing the above safety precautions can significantly reduce the risk to life and limb.
After fuse replacement, the cover must be closed so that the tabs snap into place before the instrument is started
up again.
