Maintenance; Securing The Unit; Battery Replacement - Benning MM 7-1 Instrucciones De Servicio

measured. Read the measurement value on the digital display  of the
BENNING MM 7-1.
See fig. 11:
8.9 Voltage indicator
The voltage indicator function is not intended for testing the

absence of voltage. Even without an indication or acoustic
signal, a dangerous contact voltage might be applied. Electrical
danger!
The voltage indicator function is possible from each position of the rotary switch
(except for switch position "OFF"). No measuring lines are required as voltage
indicator (non-contact detection of an alternating field). The detector is located
on the top side of the BENNING MM 7-1. Press the "VoltSensor" key  and
the measured value indication disappears. If a phase voltage is localized, an
acoustic signal will be emitted and the signal intensity of the alternating field will
be indicated on the display by a maximum of 4 bars. An indication is made in
earthed AC current networks only! The phase can be determined by means of
a single-pole measuring line.
Practical hint:
Interruptions (cable breaks) in cables lying around openly such as e.g. cable
reels, fairy lights etc. can be traced from the feeding point (phase) to the point
of interruption.
Functional range: ≥ 230 V
See figure 12:
8.9.1 Phase test
- Connect the red safety measuring lead to the jack for V, Ω, Hz, ,
the BENNING MM 7-1.
- Bring the safety measuring line into contact with the measuring point of the
system part and press the „VoltSensor" key  .
- If an acoustic signal is emitted and bars are indicated on the display, the
phase of an earthed alternating voltage is applied to this measuring point
(system part).
9.

Maintenance


Before opening the BENNING MM 7-1, ensure that it is not
connected to a source of voltage! Electrical hazard!
Any work required on the BENNING MM 7-1 when it is under voltage must be done
only by a qualified electrician. Special steps must be taken to prevent accidents.
Before opening the BENNING MM 7-1, remove it from all sources of voltage as follows:
- First remove both safety measuring leads from the measurement points.
- Remove both safety measuring leads from the BENNING MM 7-1
- Turn the rotating switch  to "OFF".

9.1 Securing the unit

Under certain circumstances, the safety of the BENNING MM 7-1 can no longer
be guaranteed. This may be the case if:
- there are visible signs of damage on the unit,
- errors occur in measurements,
- the unit has been stored for a long period of time under the wrong conditions, and
- if the unit has been subjected to rough handling during transport.
In these cases, the BENNING MM 7-1 must be switched off immediately, removed
from the measuring points and secured to prevent it from being used again.
9.2 Cleaning
Clean the outside of the unit with a clean dry cloth. (Exception: any type of
special cleaning cloth). Never use solvents or abrasives to clean the testing unit.
Ensure that the battery compartment and the battery contacts have not been
contaminated by electrolyte leakage.
If any electrolyte or white deposits are seen near to the battery or in the battery
compartment, remove them with a dry cloth, too.

9.3 Battery replacement


Before opening the BENNING MM 7-1, ensure that it is not
connected to a source of voltage! Electrical hazard!
The BENNING MM 7-1 is powered by 9-V block battery. The battery must be
replaced (see fig. 13) when the battery symbol  appears in the display  .
To replace the battery, proceed as follows:
- First remove the safety measuring leads from the measurement circuit.
07/ 2016
Temperature measurement
Voltage indicator with buzzer
BENNING MM 7-1
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