NARDA NBM-550, Operating Manual

Page: 33 / 156

3.4 Power supply EHP-50
Narda NBM-550
23
3.4 Power supply EHP-50
The EHP-50 Analyzer is fitted with a fixed, non-
exchangeable rechargeable battery which provides at least
9 hours of operation when fully charged. The battery is
charged using the charger unit supplied. It takes
approximately 6 hours to recharge the battery if it is almost
completely discharged.
Note:
You cannot operate the EHP-50 with the charger unit
connected as this considerably affects the measurement
characteristics of the EHP-50.
Charging the battery
Starting the charging cycle:
✓
The AC line voltage must match the operating voltage of
the charger unit.

Connect the charger unit to the AC line first and then
connect it to the charger socket on the EHP-50
(Figure 2 13d).

The charging cycle starts and the
DATA
LED flashes
rapidly:
– Orange: battery charging
– Green: battery fully charged
Note:
You can charge the battery with the EHP-50 switched on or
off. If you connect the charger unit when a measurement is
in progress, the measurement will stop and the charging
cycle starts. The EHP-50 remains switched off when you
unplug the charger unit.
WARNING
Charging the battery with an unsuitable
charger unit
The battery can overheat, explode or ignite
spontaneously.

You must only use the charger unit supplied with the
device for charging the battery.