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05/ 2020
BENNING MM 3
11
2. Safety note
The instrument is built and tested in accordance with
DIN VDE 0411 part 1/ EN 61010-1
DIN VDE 0411 Part 2-033/EN 61010-2-033
DIN VDE 0411 Part 031/EN 61010-031
and has left the factory in perfectly safe technical condition.
To maintain this condition and ensure safe operation of the multimeter, the user
must observe the notes and warnings given in these instructions at all times.
Improper handling and non-observance of the warnings might involve severe
injuries
or
danger to life
.
WARNING! Be extremely careful when working with bare
conductors or main line carrier! Contact with live conductors
will cause an electric shock!
The unit may be used only in power circuits within the over-
voltage category II with a conductor for 600 V max. to earth,
or within overvoltage category III with a conductor for 300 V
against ground.
Only use suitable measuring leads for this. With measurements
within measurement category III, the projecting conductive
part of a contact tip of the measuring leads must not be longer
than 4 mm.
Prior to carrying out measurements within measurement cat-
egory III, the push-on caps provided with the set and marked
with CAT III and CAT IV must be pushed onto the contact tips.
The purpose of this measure is user protection.
Remember that work on electrical components of all kinds is
dangerous. Even low voltages of 30 V AC and 60 V DC may be
dangerous to human life.
Before starting the multimeter up, always check it as well as all
cables and wires for signs of damage.
Should it appear that safe operation of the multimeter is no longer possible, it
should be shut down immediately and secured to prevent it being switched on
accidentally.
It may be assumed that safe operation is no longer possible:
- if the instrument or the measuring leads show visible signs of damage, or
- if the multimeter no longer functions, or
- after long periods of storage under unfavourable conditions, or
- after being subjected to rough transport.
In order to avoid danger,
- do not touch the bare prod tips of the measuring leads,
- insert the measurement leads in the appropriately desig-
nated measuring sockets on the multimeter
3. Scope of delivery
The following items are included in the delivery of a BENNING MM 3:
3.1 one BENNING MM 3
3.2 one safety test lead, red (L= 1.4 m)
3.3 one safety test lead, black (L= 1.4 m)
3.4 one protective rubber holster
3.5 one compact protective carrying case
3.6 one 9 V battery and two different fuses (built into unit)
3.7 one operating manual
Note on replaceable parts :
- The BENNING MM 3 contains fuses for overload protection :
One fast blow fuse rated 16 A (500 V), D = 6.35 mm , L = 32 mm (part no.
749770) and one fast blow fuse rated 1 A (500 V), D = 6.35 mm, L = 32 mm
(part no. 749669).
- The BENNING MM 3 is powered by a built-in 9 V block battery (IEC 6 LR 61).
4. Tester description
refer to figure 1 front tester panel
The display and operating elements shown in figure 1 are denoted as follows:
Digital display
for measurement values, display for overrange indication,
