Cleaning and maintenance
Revision 7 | Operating instructions HE 50 23 | 26
Electrical power supply and battery change
A commercially available 9 V battery or 9 V rechargeable battery is required for
powering the HE 50.
To check the supply voltage, turn the dial switch to "Battery".
Display shows:
Ba 9.0 V
The supply voltage must be greater than 7.2 V. Otherwise, the HE 50 will switch itself
off automatically.
A weak battery cannot lead to an incorrect measurement. The following message is
shown on the display in good time:
load acc
Open the battery compartment on the measurement device using the slide.
1
There is a black rubber belt around the battery to aid removal.
Change the battery or recharge the rechargeable battery using the external charger.
Before fitting the battery, place the black rubber band around the battery again.
When inserting, pay attention to the positive and negative symbols on the housing.
More than 500 measurements can be carried out with a new
battery.
6: Battery compartment
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