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Power Supply
AC (Mains) Operation
• Only use the supplied AC (mains) unit NR 90-1 for the
set.
• Adjust the local mains voltage on the AC (mains) unit.
220... 240V 110 ... 127V
• Connect the mains unit to the DC IN 9 V socket(30)
(30). This automatically disconnects the inserted
batteries.
- No responsibility can be accepted for damage due to
operation with the voltage selector set to the wrong
position.
• Remove the batteries if the unit is to be operated perma-
nently on the mains!
Battery Operation
With four 1.5 V batteries, type IEC LR 6 or AA.
We recommend the use of alkaline-manganese batteries
with low mercury constituent or no mercury at all.
• Disconnect the plug of the AC (mains) unit from the DC IN
9 V socket (30).
• Open the cover of the battery compartment (10)
(on back of unit).
• Insert the batteries with correct polarity
(see scheme on bottom of battery compartment).
• For this, observe the order of the batteries and the posi-
tion of the take-out ribbon (see Fig. to the right)
Battery Check
When the batteries get weak, a battery symbol ( )
will appear in the display (4).