Securing The Instrument; Battery Change; Fuse Replacement - Benning MM 11 Bedienungsanleitung

by skilled electricians with special precautions for the prevention of
accidents.
Make the BENNING MM 11 voltage free as follows before opening the instru-
ment:
- First remove the two safety measuring leads from the object to be meas-
ured.
- Then disconnect the two safety measuring leads from the BENNING MM 11.
- Turn the rotary switch  to the switch setting "OFF".

9.1 Securing the instrument

Under certain circumstances safe operation of the BENNING MM 11 is no
longer ensured, for example in the case of:
- Visible damage of the casing.
- Incorrect measurement results.
- Recognisable consequences of prolonged storage under improper condi-
tions.
- Recognisable consequences of extraordinary transportation stress.
In such cases the BENNING MM 11 must be switched off immediately, discon-
nected from the measuring points and secured to prevent further utilisation.
9.2 Cleaning
Clean the casing externally with a clean dry cloth (exception: special cleaning
wipers). Avoid using solvents and/or scouring agents for cleaning the instru-
ment. It is important to make sure that the battery compartment and battery
contacts are not contaminated by leaking electrolyte.
If electrolyte contamination or white deposits are present in the region of the
batteries or battery casing, clean them too with a dry cloth.

9.3 Battery change

Before opening the BENNING MM 11, make sure that it is free of

voltage! Electrical danger!
The BENNING MM 11 is supplied by a 9 V block battery. A battery change (see
Figure 12) is required, if  the battery symbol (
unit (battery voltage approx. 7 V).
Proceed as follows to replace the batteries:
- Disconnect the safety measuring leads from the measuring circuit.
- Disconnect the safety measuring leads from the BENNING MM 11.
- Set the rotary switch  to the switch setting "OFF".
- Remove the rubber protection frame  from the BENNING MM 11.
- Place the BENNING MM 11 onto its front and turn the slotted screws of the
battery compartment by 90 ° in an anticlockwise direction.
- Lift the battery compartment cover off the bottom section.
- Lift the discharged battery from the battery compartment and carefully
disconnect the battery supply lines from the battery.
- The new battery has to be connected to the battery supply lines, and
arrange these such that they are not crushed between the housing parts.
Then place the battery into the battery compartment provided for this pur-
pose.
- Engage the battery cover into the bottom section and turn the slotted
screws of the battery cover by 90 ° in a clockwise direction.
- Place the BENNING MM 11 into the rubber protection frame 
See figure 12:
Make your contribution to environmental protection! Do not
dispose of discharged batteries in the household garbage.

Instead, take them to a collecting point for discharged batteries
and special waste material.
community.

9.4 Fuse replacement

Before opening the BENNING MM 11, make sure that it is free

of voltage! Electrical danger!
The BENNING MM 11 is protected against overload conditions by a fitted fuse
(G-melt insert) 1 A quick-acting and a fitted fuse (G-melt insert) 15 A quick-act-
ing (see Figure 13).
Proceed as follows to replace the fuses:
- Disconnect the safety measuring leads from the measuring circuit.
- Disconnect the safety measuring leads from the BENNING MM 11.
- Set the rotary switch  to the switch setting "OFF".
03/ 2011
Battery replacement
BENNING MM 11
)  appears on the display
Please inform yourself in your

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