MM 71 - Multimeter BENNING - Free user manual and instructions

Name: MM 71
Brand: BENNING
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Brand	BENNING
Model	MM 71
Product type	Professional digital multimeter
Measurement categories	CAT III 1000 V / CAT IV 600 V
Maximum voltage	1000 V DC/AC
Maximum current	10 A (up to 600 mA on separate input)
Display	LCD 6000 counts, backlit, 62-segment bargraph
Main measurements	DC/AC voltage, DC/AC current, resistance, capacitance, frequency, temperature, diode test, continuity
Other functions	AutoV/LoZ, MIN/MAX/PEAK, Smart HOLD, VoltSensor (non-contact voltage detection), auto power off
Power supply	9 V battery (type IEC 6 LR61)
Battery life	Approx. 180 hours (alkaline)
Dimensions (without holster)	180 x 88 x 33.5 mm
Dimensions (with holster)	190 x 94 x 48 mm
Weight (without holster)	320 g
Weight (with holster)	460 g
Operating temperature	0 °C to +50 °C (according to HR)
Protection rating	IP30
Included accessories	Test leads (red/black), type K temperature probe, rubber holster, magnetic hanger, carrying case, 9 V battery, spare fuses, manual
Protection fuses	440 mA/1000 V (fast-acting) and 11 A/1000 V (fast-acting)
Maintenance and cleaning	Clean with a dry cloth and mild detergent, do not use solvents
Warranty / Calibration	1-year warranty, annual calibration recommended

Frequently Asked Questions - MM 71 BENNING

How to replace the battery of the BENNING MM 71?

Turn off the device and remove the leads. Unscrew the rear cover (after removing the rubber holster). Replace the used 9 V battery with a new one (type IEC 6 LR61). Close carefully.

What to do if the display shows 'OL'?

'OL' means overload. Select a higher measurement range manually (RANGE button) or use auto range mode. Also check that the leads are properly connected.

How to use the VoltSensor function?

Press the VoltSensor button (⑤) without connecting leads. Bring the sensor (front side of the device) close to a conductor. An audible signal and bars indicate the presence of AC voltage (≥230 V). This does not replace a standard voltage test.

Can capacitors be measured with the MM 71?

Yes. Set the rotary switch to Ω, press the blue button to switch to capacitance mode. Discharge the capacitor before measurement. Connect the leads observing polarity. The display shows the value in nF or μF.

How to test a diode with this device?

Turn the rotary switch to the diode position (diode symbol). Press the blue button if necessary. Connect the red probe to the anode and the black to the cathode. A good diode shows a threshold voltage (0.4-0.8 V) in the forward direction.

What is the DC voltage accuracy?

The basic accuracy is ±(0.08% of reading + 5 digits) for ranges from 600 mV to 1000 V, and ±(0.08% + 15 digits) for the 60 mV range.

How to clean the multimeter?

Use a dry or slightly damp cloth with a mild detergent. Never use solvents, alcohol, or abrasive cleaners. Ensure the device is turned off and disconnected before cleaning.

The continuity buzzer does not work, why?

Check that the rotary switch is on the continuity position (sound wave symbol). Ensure the leads are not broken. The buzzer sounds for resistance below 30 Ω (threshold 30-100 Ω). Above that, it stops.

How to replace a fuse?

Turn off the device and remove the leads. Open the case (unscrew the cover). Locate the defective fuse (440 mA or 11 A). Replace it with a fuse of the same rating (fast-acting, 1000 V, identical dimensions). Close.

Which test lead to use for CAT III/IV?

The supplied leads are rated CAT III 1000 V / CAT IV 600 V. For CAT III/IV measurements, place the protective caps (included) on the contact tips to limit the exposed length to 4 mm.

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Download the instructions for your Multimeter in PDF format for free! Find your manual MM 71 - BENNING and take your electronic device back in hand. On this page are published all the documents necessary for the use of your device. MM 71 by BENNING.

USER MANUAL MM 71 BENNING

Fig. 6: Resistance measurement

Obr. 7: Zkouška diod

Fig. 8: Continuity Testing with buzzer

Fig. 9: Capacity Testing

Fig. 10: Frequency measurement

text_image

HOLD 88.88 RANKS MM 7-1

Fig. 11: Temperature measurement

text_image

8.8.8.8 Peak Hold A=0.12 A=0.12 A=0.12 A=0.12 A=0.12 A=0.12 A=0.12 A=0.12 A=0.12 A=0.12 A=0.12 A=0.12 A=0.12 A=0.12 A=0.12 B=0.12 B=0.12 B=0.12 B=0.12 B=0.12 B=0.12 B=0.12 B=0.12 B=0.12 B=0.12 B=0.12 B=0.12 B=0.12 B=0.12 B=1.56 B=1.56 B=1.56 B=1.56 B=1.56 B=1.56 B=1.56 B=1.56 B=1.56 B=1.56 B=1.56 B=1.56 B=1.56 B=1.56 B=1.56 C=0.12 C=0.12 C=0.12 C=0.12 C=0.12 C=0.12 C=0.12 C=0.12 C=0.12 C=0.12 C=0.12 C=0.12 C=0.12 C=0.12 C=0.12 D=0.12 D=0.12 D=0.12 D=0.12 D=0.12 D=0.12 D=0.12 D=0.12 D=0.12 D=0.12 D=0.12 D=0.12 D=0.12 D=0.12 D=1.56 D=1.56 D=1.56 D=1.56 D=1.56 D=1.56 D=1.56 D=1.56 D=1.56 D=1.56 D=1.56 D=1.56

Fig. 12: Voltage indicator with buzzer

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Technical line drawing of a mechanical device with internal components (no text or symbols)

Fig. 13: Battery replacement

Fig. 13: Remplacement de la pile

Fig. 13: Cambio de pila

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Technical line drawing of an open electronic device casing with internal components (no text or symbols)

Fig. 14: Fuse replacement

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Line drawing of a handheld electronic device with a screwdriver and connector (no text or symbols)

BENNING MM 71 - 1

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Technical line drawing of a mechanical device with two vertical supports and a central knob (no text or symbols)

Fig. 15: Winding up the safety measuring leads

Fig. 16: Standing up the BENNING MM 7-1

Fig. 16: Installation du BENNING MM 7-1

Digital Multimeter for

DC voltage measurement
AC voltage measurement
DC current measurement
AC current measurement
Resistance measurement
Diode testing
Continuity testing
Capacity measurement
Frequency measurement
Temperature measurement

1. Operating Instructions

This operating manual is intended for:

electricians and
qualified electrotechnical persons

The BENNING MM 7-1 is designed for measurements in dry surroundings. It must not be used in electrical circuits with rated voltages higher than 1000 V DC/AC (for more details, see section 6 "Ambient conditions").

The following symbols are used in the operating manual and on the BENNING MM 7-1 itself:

BENNING MM 71 - Operating Instructions - 1

Attention! Magnets might affect the correct functioning of cardiac pacemakers and implanted defibrillators. As a user of such medical devices, keep a sufficient distance to the magnet.

BENNING MM 71 - Operating Instructions - 2

Warning of electrical danger!

Indicates instructions which must be followed to avoid danger to persons.

BENNING MM 71 - Operating Instructions - 3

Important, comply with the documentation!

The symbol indicates that the information provided in the operating instructions must be followed with in order to avoid risks.

BENNING MM 71 - Operating Instructions - 4

This symbol on the BENNING MM 7-1 indicates that the unit is protection insulated (safety class II).

BENNING MM 71 - Operating Instructions - 5

This symbol on the BENNING MM 7-1 indicates the fuses which it contains.

BENNING MM 71 - Operating Instructions - 6

This symbol on the BENNING MM 7-1 means that the BENNING MM 7-1 complies with the EU directives.

BENNING MM 71 - Operating Instructions - 7

This symbol appears on the display for a discharged battery.

BENNING MM 71 - Operating Instructions - 8

This symbol indicates the “continuity-testing” application. The buzzer provides an audible signal.

BENNING MM 71 - Operating Instructions - 9

This symbol indicates the "diode-testing" application.

BENNING MM 71 - Operating Instructions - 10

This symbol marks the range "capacity testing".

BENNING MM 71 - Operating Instructions - 11

(DC) voltage or current.

BENNING MM 71 - Operating Instructions - 12

(AC) voltage or current.

BENNING MM 71 - Operating Instructions - 13

Earth (voltage to earth).

2. Safety notes

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 to 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.

BENNING MM 71 - Safety notes - 1

WARNING! Be extremely careful when working with bare conductors or main line carrier! Contact with live conductors will cause an electric shock!

BENNING MM 71 - Safety notes - 2

Attention! Magnets might affect the correct functioning of cardiac pacemakers and implanted defibrillators. As a user of such medical devices, keep a sufficient distance to the magnet.

BENNING MM 71 - Safety notes - 3

The BENNING MM 7-1 may be used only in electrical circuits of over voltage category III with a maximum voltage of 1000 V or of over voltage category IV with a maximum voltage of 600 V between the conductor and ground.

Only use suitable measuring leads for this. With measurements within measurement category III or measurement category IV, 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 category III and measurement category IV, 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.

BENNING MM 71 - Safety notes - 4

Before starting the multimeter, always check it as well as all measuring leads 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 that it is 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 works, or
after long periods of storage under unfavourable conditions, or
after being subject to rough transportation, or
if the device or the measuring leads are exposed to moisture.

BENNING MM 71 - Safety notes - 5

In order to avoid danger,

do not touch the bare probe tips of the measuring leads,
insert the measurement leads in the appropriately designated measuring sockets on the multimeter

BENNING MM 71 - Safety notes - 6

Cleaning:

Regularly wipe the housing by means of a dry cloth and cleaning agent. Do not use any polishing agents or solvents!

3. Scope of delivery

The following items make up the standard BENNING MM 7-1 package:

3.1one BENNING MM7-1,

3.2 one safety measuring lead, red (L = 1.4 m),
3.3 one safety measuring lead, black (L = 1.4 m),
3.4 one wire temperature sensor, type K
3.5 one protective rubber holster,
3.6 one magnetic holder with adapter and strap

3.7 one compact protection carrying case,

3.8 one 9-V block battery and two different fuses (integrated in the new unit when it is supplied),

3.9 one operating manual.

Note on optional accessory:

- Temperature probe (K-type) made of V4A tube application: insertion probe for soft-plastic materials, liquids, gas and air measuring range: - 196 °C up to 800 °C dimensions: length = 210 mm, tube length = 120 mm, tube diameter = 3 mm, V4A (P.no. 044121)

Note on replaceable parts:

The BENNING MM 7-1 contains fuses for overload protection:
One fuse rated 11 A rapid-acting (1000 V) 30 kA, D = 10 mm, L = 38 mm (P.no. 10218772) and one fuse rated 440 mA rapid-acting (1000 V), D = 10 mm, L = 34.9 mm (P.no. 10016655).
The BENNING MM 7-1 is powered by one 9-V block battery (IEC 6 LR 61).
The above mentioned safety cable (tested spare part) are approved in accordance with CAT III 1000 V/ CAT IV 600 V and for a current up 10 A.

4. Description of unit

See fig. 1: Front panel

The display and operating elements shown in fig. 1 are as follows:

Digital display, for the measurement reading, bar graph and display for overrange indication,
② Polarity display,
③ Battery display,
4 RANGE key, switchover between automatic and manual measuring range,
⑤ VoltSensor key, for determining AC voltage to earth,
6 MIN/MAX key, storage of highest and lowest measurement value or peak value,
⑦ Smart HOLD key,
⑧ Button (yellow), display illumination,
9 Function key (blue), for direct voltage/ current (DC) or alternating voltage/ current (AC), resistance or capacity measurement, continuity or diode testing, frequency measurement, temperature measurement in °C or °F,
10 Rotating switch, for selecting measuring function.
⑪ Socket (positive ^1 ) for V, Ω, Hz, ↓, -H
⑫ COM socket, joint socket for measurement of current, voltage, resistance, frequency, temperature, capacity, continuity and diode testing,
13 Socket (positive), for mA range, for currents up to 600 mA,
14 Socket (positive), for 10-A range, for currents up to 10 A,
15 Protective rubber holster
^1) The automatic polarity display for DC current and voltage refers to this.

5. General data

5.1 General data on multimeter

5.1.1 The digital display is designed as a 4 digit liquid-crystal indicator with 14 mm digit height and decimal point. The highest value displayed is 6000.

5.1.2 The bar graph display consists of 62 segments.

5.1.3 The polarity indication ^2 functions automatically. Only a polarity contrary to the socket definition is indicated, as “-”.

5.1.4 The range overload will be displayed with "OL" or "-OL" and sometimes with an acoustic signal.

Attention: no display or warning by complete overload.

5.1.5 The “RANGE” key ④ can be used to change over to the manual measuring ranges and to hide “AUTO” on the display at the same time. By pressing the key for approx. 2 seconds, the automatic range selection is activated (“AUTO” on the display).

5.1.6Volt sensor key ⑤: The voltage indicator function is intended for localizing AC voltages to earth (see 8.9).

5.1.7 The “MIN/MAX” key ⑥ function records and stores the highest and lowest measurements automatically. By pressing the button several times, the following values are shown: Display “MAX/MIN” shows the current measurement value, “MAX” shows the highest value stored and “MIN” the lowest value stored. The “HOLD” key serves to interrupt the “MIN/MAX” function. When the key is pressed for 2 sec. the unit switches back to normal mode. Press the “MIN/MAX” key ⑥ for 2 seconds to switch over to the “PEAK” function (peak value storage). The “PEAK” function detects and stores the positive and negative peak/ crest value (> 1 ms) in the mV, V AC/ DC and mA, A AC/ DC function. The

automatic range selection is deactivated in the MIN/ MAX and PEAK function.

5.1.8 "Smart HOLD" - storage of measurement reading: When the "Smart HOLD" key ⑦ is pressed, the measurement reading is stored in the memory. The symbol "HOLD" appears in the display at the same time. If the measured value increases by 50 digit above the saved value the change in measured value is shown by a blinking display and by a signal tone. (changes of measured values between AC and DC voltage/current will not be recognized).

5.1.9 The yellow button ⑧ switches the display illumination on. To switch it off, press the yellow key again.

5.1.10 The function key (blue) ⑨ serves to select the secondary or third function of the rotary switch position.

Switch position Function
Hz	Hz
ac+dc	ac+dc
ac+dc m	m m ac+dc
^-1(-)	-1(-)

m ac+dc Hz	m Hz m ac+dc
ac+dc Hz	Hz ac+dc
	^ ^

Switch position Function
Hz	Hz
ac+dc	ac+dc
ac+dc m	m m ac+dc
^-1(-)	-1(-)

m ac+dc Hz	m Hz m ac+dc
ac+dc Hz	Hz ac+dc
	^ ^

5.1.11 The nominal measurement rate of the BENNING MM 7-1 is 3 measurements per sec. for the digital display.
5.1.12 The BENNING MM 7-1 is switched on and off by the rotating switch ^⑩ . Switch-off position "OFF".
5.1.13 The BENNING MM 7-1 switches off automatically after approx. 20 minutes (APO, Auto-Power-Off). It switches back on again when the HOLD key (or another) is pressed. Deactivate the automatic switch-off by pressing the function key (blue) ⑨ and simultaneously switching the BENNING MM 7-1 ON from the switch position "OFF".
5.1.14 Check the segments of the digital display by pressing the "Smart HOLD" key ⑦ and simultaneously switching the BENNING MM 7-1 ON from the switch position "OFF".
5.1.15 Temperature coefficient of measurement value: 0.15 x (stated measurement accuracy)/ °C < 18 °C or > 28 °C relative to the value at the reference temperature of 23 °C.
5.1.16 The BENNING MM 7-1 is powered by one 9-V block battery (IEC 6 LR 61).
5.1.17 The battery display ^3 permanently shows the remaining battery capacity over a maximum 3 segments.

4

As soon as all segments in the battery symbol have gone off and the battery symbol blinks please exchange the battery for a new battery immediately in order to avoid a risk through false measurements for people.

5.1.18 The life span of a battery is approx. 180 hours (alkali battery).
5.1.19 Appliance dimensions: (L x W x H) = 180 x 88 x 33.5 mm without protective rubber holster (L x W x H) = 190 x 94 x 48 mm with protective rubber holster Weight: 320 g without protective rubber holster 460 g with protective rubber holster
5.1.20 The safety measuring leads are expressly suitable for the rated voltage and power of the BENNING MM 7-1.
5.1.21 The BENNING MM 7-1 is protected against mechanical damage by a protective rubber holster 15 . The protective rubber holster 15 makes it possible to suspend the BENNING MM 7-1 during the measuring process or to stand it upright.

6. Ambient conditions

The BENNING MM 7-1 is designed only for measuring in dry surroundings,
Maximum barometric height during measurement: 2000 m.
Overvoltage category / setting category: IEC 60664/ IEC 61010-1 → 600 V

cate gory IV; 1000 V category III.

Degree of contamination: 2.
Protection class: IP 30 (DIN VDE 0470-1 IEC/ EN 60529).

IP 30 means: Protection against access to dangerous parts and protection against solid impurities of a diameter > 2.5 mm, (3 - first index). No protection against water, (0 - second index).

- Operating temperature and relative humidity:

At operating temperatures of 0 °C to 30 °C: relative humidity under 80 %.

At operating temperatures of 30 °C to 40 °C: relative humidity under 75 %.

At operating temperatures of 40 °C to 50 °C: relative humidity under 45 %.
Storage temperature: The BENNING MM 7-1 can be stored at temperatures from -20 °C to +60 °C (humidity 0 up to 80 %). The batteries must be removed from the unit.

7. Electrical data

Note: The measurement accuracy is stated as the sum of

a relative proportion of the measurement value and
a number of digits (i.e. numerical steps of the last place).

This measurement accuracy applies for a temperature of 18 °C to 28 °C and a maximum relative humidity of max. 80 %.

7.1 DC voltage ranges

The input resistance is 10 MΩ

Measuring range Resolution Measurement accuracy Overload protection
60 mV	10 μV	± (0.08 % of reading + 15 digits)	1000 V_DC
600 mV	100 μV	± (0.08 % of reading + 5 digits)	1000 V_DC
6 V	1 mV ± (0.08 % of reading + 5 digits)		1000 V_DC
60 V	10 mV	± (0.08 % of reading + 5 digits)	1000 V_DC
600 V	100 mV	± (0.08 % of reading + 5 digits)	1000 V_DC
1000 V	1 V	± (0.08 % of reading + 5 digits)	1000 V_DC

7.2 AC/ AC+DC voltage ranges

The input resistance is 10 MΩ parallel < 100 pF. The measurement value is obtained as a true RMS value and displayed as such. With non-sinusoidal curves, the value displayed is less accurate. This results in an additional error for the following crest factors:

Crest factor of 1.4 to 2.0, additional error + 1.0 %.

Crest factor of 2.0 to 2.5, additional error + 2.5 %.

Crest factor of 2.5 to 3.0, additional error + 4.0 %.

AC Measuring range	Resolution	Measurement accuracy in frequency range 50 Hz - 1 kHz	Overload protection
60 mV	10 μV	± (1.2 % of reading + 10 digits)	1000 V_eff
600 mV	100 μV	± (1.2 % of reading + 10 digits)	1000 V_eff
6 V	1 mV	± (0.8 % of reading + 5 digits)	1000 V_eff
60 V	10 mV	± (0.8 % of reading + 5 digits)	1000 V_eff
600 V 100 mV		± (0.8 % of reading + 5 digits)	1000 V _eff
1000 V	1 V	± (0.8 % of reading + 5 digits)	1000 V_eff

AC+DC Measuring range	Measurement accuracy in frequency range 50 Hz - 1 kHz
mV	± (2 % of reading + 15 digits)
V	± (2 % of reading + 10 digits)

7.3 AutoV, "LoZ" range

The low-impedance input resistance of approx. 3 kΩ serves to suppress inductive and capacitive voltages.

Measuring range	Resolution	Measurement accuracy	Overload protection
600 V_DC	100 mV	± (0.8 % of reading + 5 digits)	1000 V_AC/DC
1000 V_DC	1 V	± (0.8 % of reading + 5 digits)	1000 V_AC/DC
in frequency range 50 Hz - 500 Hz
600 V_AC	100 mV	± (0.8 % of reading + 5 digits)	1000 V_AC/DC
1000 V_AC	1 V	± (0.8 % of reading + 5 digits)	1000 V_AC/DC

7.4 DC current ranges

Overload protection:

- 440 mA (1000 V) fuse, 11 kA, rapid on mA input

- 11 A (1000 V) fuse, 30 kA, rapid on 10 A input

Max. measuring time:

10 A range: 3 minutes (pause > 20 minutes)
600 mA range: 10 minutes (pause > 20 minutes)

Measuring range Resolution Measurement accuracy

60 mA 10 μA ± (0.8 % of reading + 5 digits)

600 mA 100 μA ± (0.8 % of reading + 5 digits)

6 A 1 mA ± (0.8 % of reading + 5 digits)

10 A 10 mA ± (0.8 % of reading + 5 digits)

7.5 AC/ AC+DC current ranges

The measurement value is obtained as a true RMS value and displayed as such. With non-sinusoidal curves, the value displayed is less accurate. This results in an additional error for the following crest factors:

Crest factor of 1.4 to 2.0, additional error + 1.0 %.

Crest factor of 2.0 to 2.5, additional error + 2.5 %

Crest factor of 2.5 to 3.0, additional error + 4.0 %

Overload protection:

440 mA (1000 V) fuse, 11 kA, rapid on mA input
11 A (1000 V) fuse, 30 kA, rapid on 10 A input

Max. measuring time:

10 A range: 3 minutes (pause > 20 minutes)
600 mA range: 10 minutes (pause > 20 minutes)

AC Measuring range	Resolution	Measurement accuracy in frequency range 50 Hz - 1 kHz
60 mA 10 μA ± (1.2 % of reading + 5 digits)
600 mA 100 μA ± (1.2 % of reading + 5 digits)
6 A 1 mA ± (1.2 % of reading + 5 digits)
10 A 10 mA ± (1.2 % of reading + 5 digits)

AC+DC Measuring range	Measurement accuracy in frequency range 50 Hz - 1 kHz
mA	± (2 % of reading + 10 digits)
A	± (2 % of reading + 10 digits)