Operation Manual

09/ 2013 BENNING MM 1 9
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2. Safety note
The instrument is built and tested in accordance with
DIN VDE 0411 part 1/ EN 61010-1
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.
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The unit may be used only in power circuits within the overvolt-
age category III with a conductor for 600 V max. to earth.
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.
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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.
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In order to avoid danger,
- do not touch the bare prod tips of the measuring leads,
- insert the measurement leads in the appropriately
designated measuring sockets on the multimeter
3. Scope of delivery
The following items are included in the delivery of a BENNING MM 1:
3.1 one BENNING MM 1
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 two 1.5 V micro batteries (built into unit)
3.7 one operating manual
Note on replaceable parts:
The BENNING MM 1 is powered by two 1.5 V micro batteries (2x1.5-V-IEC LR03).
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 bar graph, display for
overrange indication,
 Polarity display,
 Battery indicator, appears when the battery is low,
 Rotary switch for function selection
 Input terminal (positive
1
) for V, , µA, ,
 COM-Terminal, common return terminal for voltage and resistance
measure ments, continuity and diode tests,
 RANGE button,
 HOLD button,
 Protective rubber holster
1
) the automatic polarity display for direct and alternating current refers to this terminal
5. General Specifications
5.1 General specifications for the BENNING MM 1
5.1.1 The digital display is a 3½ digit liquid crystal display with 10,5 mm digit