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2.5 Special types of risks

Safety

5235 / 05/2022 en

BENNING MM 7-2

14

2.5

Special types of risks

DANGER

Bare conductors or main line carriers

Danger to life or serious injury is possible due to contact with high electric voltage when working
with bare conductors or main line carriers.

• Please observe relevant regulations on occupational safety and health.

• If necessary, use appropriate protective equipment.

WARNING

Dangerous voltage

Danger to life or serious injury is possible due to contact with high electric voltage when working
on live components or equipment. Even low voltages from 30 V‑AC and 60 V‑DC on can be
dangerous to human life!

• Please observe relevant regulations on occupational safety and health.

• If necessary, use appropriate protective equipment.

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Содержание MM 7-2

Страница 1: ...BENNING MM 7 2 Operating manual Translation of the German original version 5235 05 2022 en ...

Страница 2: ...G All rights reserved This document particularly all of the contents texts photographs and graphics that it contains are protected by copyright No part of this documentation or the associated contents may be reproduced or edited copied or distributed using electronic media in any form printed photocopied or using any other method without express written permission Disclaimer The contents of the do...

Страница 3: ... 4 VoltSense key 22 4 2 5 PEAK key 22 4 2 6 HOLD key 23 4 2 7 REL Δ key 23 4 2 8 RANGE key 24 4 2 9 AutoV LoZ function 24 4 2 10 Jack control 24 4 2 11 Further setting options 25 4 3 Measuring ranges 26 4 3 1 Voltage ranges 26 4 3 2 Current ranges 28 4 3 3 Resistance ranges 29 4 3 4 Continuity test 29 4 3 5 Diode test 29 4 3 6 Capacitance ranges 30 4 3 7 Frequency ranges 30 4 3 8 Temperature range...

Страница 4: ...e indicator 39 5 8 1 Non contact phase testing 39 5 8 2 External conductor or phase testing 41 6 Maintenance 42 6 1 Maintenance schedule 42 6 2 Making the device free of voltage 42 6 3 Cleaning the device 43 6 4 Replacing the batteries 44 6 5 Calibrating the device 44 6 6 Replacing the fuses 45 7 Technical data 46 8 Disposal and environmental protection 47 Index 48 5235 05 2022 en BENNING MM 7 2 4...

Страница 5: ...e 8 Digital display 19 Figure 9 Voltage frequency or duty cycle measurement 34 Figure 10 Current or frequency measurement 35 Figure 11 Resistance measurement or continuity test 36 Figure 12 Capacitance measurement or diode testing 37 Figure 13 Temperature measurement 38 Figure 14 Non contact phase testing 39 Figure 15 External conductor or phase testing 41 Figure 16 Battery replacement exemplary 4...

Страница 6: ...e ranges V DC 27 Table 10 Voltage ranges LoZ AutoV 27 Table 11 AC ranges A AC A AC DC 28 Table 12 DC ranges A DC 28 Table 13 4 20 mA DC current loop 28 Table 14 Resistance ranges Ω 29 Table 15 Continuity test 29 Table 16 Diode test 29 Table 17 Capacitance ranges F 30 Table 18 Mains frequency ranges Hz 30 Table 19 5 V logic level frequency ranges Hz 30 Table 20 Logic level duty cycle 31 Table 21 Te...

Страница 7: ...urement Temperature measurement Further information http tms benning de mm7 2 On the Internet you will find the following additional information directly at the specified link or at www benning de product search Operating manual of the device in several languages Further information depending on the device e g brochures technical reports FAQs 1 1 General notes Target group This operating manual is...

Страница 8: ...ns resulting from the failure to observe the instructions in this operating manual The devices are subject to continuous further development Benning reserves the right to make changes to the device s design configuration and technology The information in this operating manual corresponds to the state of technical knowledge at the time of printing For this reason no claims for certain device charac...

Страница 9: ...echnical questions on handling the device Phone 49 2871 93 555 Fax 49 2871 93 6555 E Mail helpdesk benning de Internet www benning de Returns management Easily and conveniently use the BENNING returns portal for a quick and smooth returns processing https www benning de service de retourenabwicklung html Phone 49 2871 93 554 E Mail returns benning de Return address BENNING Elektrotechnik und Elekt...

Страница 10: ... or deadly injuries will occur WARNING Hazard to humans If you do not pay attention to this warning irreversible or deadly injuries could occur CAUTION Minor hazard to humans If you do not pay attention to this warning minor or moderate injuries could occur NOTICE Danger to property not to persons If you do not pay attention to this warning material damage could occur If multiple hazard levels occ...

Страница 11: ...ltage mains installation of a building CAT IV Measuring category IV is applicable to testing and measuring circuits connected to the feeding point of the low voltage mains installation of a building The device complies with EU directives The device complies with UK directives At the end of product life dispose of the unserviceable device via appropriate collecting facilities provided in your commu...

Страница 12: ...ng the device The device may only be used in a technically perfect and safe condition Always check the device for damages before using it Make sure the personnel using the device is qualified for the respective task Observe relevant regulations on occupational safety and health as well as those on environmental protection The device may only be used inside buildings and in dry environments Do not ...

Страница 13: ... with high electric voltage when opening the device The device might get damaged Make sure that the device is free of voltage before opening the battery compartment or housing Do not open the device except for the battery compartment and replacing a fuse Please contact your specialty retailer or the returns management for any repairs page 9 Securing the device If the device is not in a technically...

Страница 14: ...iers Please observe relevant regulations on occupational safety and health If necessary use appropriate protective equipment WARNING Dangerous voltage Danger to life or serious injury is possible due to contact with high electric voltage when working on live components or equipment Even low voltages from 30 V AC and 60 V DC on can be dangerous to human life Please observe relevant regulations on o...

Страница 15: ...e temperature sensor of type K l 93 cm 3 cm item no 10231316 1 x compact protective pouch item no 010913 3 x 1 5 V micro batteries AAA IEC LR03 Fuses integrated into the device for initial assembly 1 x fuse F1 F 11 A 1 000 V 20 kA 1 x fuse F2 F 0 4 A 1 000 V 30 kA 1 x operating manual Optional accessories Flexible AC current transformer BENNING CFlex 1 item no 044068 AC range 30 A 300 A 3 000 A Fi...

Страница 16: ... of safety measuring lines BENNING TA 3 item no 044126 Set of Ø 4 mm measuring lines 8 piece red black professional version CAT III 1 000 V consisting of Measuring lines silicone Test probes slender measuring probe Grabber clips Alligator clips Figure 4 BENNING TA 3 Set of Ø 4 mm safety measuring lines with 2 mm measuring probe item no 044146 Ø 4 mm measuring lines 2 piece red black l 1 40 m with ...

Страница 17: ... diode capacitance temperature 7 COM jack 8 Jack for A 9 Jack for μA mA 10 Rotary switch 11 Function keys 12 Digital display Rear panel of the device Foldable stand Battery compartment The device is powered by three 1 5 V micro batteries AAA IEC LR03 Holders for engaging the safety measuring lines You can store the safety measuring lines by wrapping them around the housing and engaging the measuri...

Страница 18: ... 11 Figure 7 Rotary switch 1 AC voltage measurement V AC 2 Voltage measurement V 3 Voltage mV frequency or duty cycle measurement 4 Resistance measurement Ω or continuity test 5 Capacitance measurement or diode test 6 Temperature measurement 7 Current measurement A mA 8 Current measurement μA 9 Setting of the rotary switch 10 Voltage measurement AutoV LoZ 11 Device switched off OFF ...

Страница 19: ...pty state of charge of the batteries When the symbol appears the batteries are discharged Polarity display automatic Indicates a polarity contrary to the jack definition with The maximum nominal measuring rate of the device is 5 measurements per second for the digital display and 50 measurements per second for the bargraph indication For reading the values in dark lighting conditions the digital d...

Страница 20: ... 2 1 Blue Function key Selecting a function Press the blue Function key to select the second third fourth or fifth function of the respective rotary switch position The last selected function will be stored for each rotary switch position and automatically preselected when setting the function again and after switching the device on again Rotary switch position symbol designation Functions AutoV L...

Страница 21: ...ackground lighting of the digital display After approx 16 minutes the background lighting is automatically switched off again Alternatively press the blue Function key 1 second to switch off the background lighting manually 4 2 2 MIN MAX key MIN MAX function The MIN MAX function automatically records the lowest and highest measured value as well as the average value of a measurement series Press t...

Страница 22: ...hresholds It is recommended to measure the measuring signal voltage or current in the automatic measuring range selection AUTO first so that the trigger threshold is set automatically and only then to enable the Hz function If the measured value is not stable use a lower sensitivity to suppress interference If the measured value is 0 Hz use a higher sensitivity 4 2 4 VoltSense key Voltage indicato...

Страница 23: ...measured value a brief acoustic signal is emitted and the A HOLD symbol flashes Remove the safety measuring lines from the measuring points simultaneously and the stored measured value will be flashing on the digital display Notes on the A HOLD function Valid for measurements 5 of the final measuring range value no OL in the resistance measuring range A measured value is considered to be stable if...

Страница 24: ...The coupling mode AC or DC is set automatically from 1 to 1 000 V depending on which peak value AC or DC is higher Other available functions are HOLD page 23 A HOLD page 23 and Voltage indicator page 22 LoZ function The input resistance briefly is only approx 2 1 kΩ in order to suppress unwanted inductive and capacitive voltages reactive voltages and increases within fractions of a second to sever...

Страница 25: ...e unit before measuring the temperature Alternatively you can disable a temperature unit so that it is not possible to select it prior to temperature measurement Enabling the temperature units C and F Press and hold the VoltSense key and simultaneously set any switch position from the OFF position of the rotary switch of the device until C F is shown on the digital display Disabling the temperatur...

Страница 26: ...5 C or specified otherwise Additional specifications for AC functions The measured value is obtained and displayed as a true r m s value TRUE RMS For non sinusoidal curves the accuracy of the displayed value decreases Maximum crest factor of the measuring signal For 50 of the final measuring range value 3 2 For 100 of the final measuring range value 1 6 Square wave signals are not specified 4 3 1 ...

Страница 27: ...cy 600 mV 0 01 mV 0 03 2 digits 6 V 0 1 mV 60 V 0 001 V 600 V 0 01 V 0 05 5 digits 1 000 V 0 1 V 0 15 5 digits Table 9 DC voltage ranges V DC Input resistance 10 MΩ II 75 pF 280 pF in the 600 mV range Voltage ranges LoZ AutoV Overload protection 1 100 V AC V DC Measuring range Resolution Measuring accuracy 6 V 0 1 mV DC 0 Hz 0 5 30 digits AC 50 60 Hz 1 0 40 digits 1 60 V 0 001 V 600 V 0 01 V 1 000...

Страница 28: ... DC ranges A DC Overload protection 11 A AC A DC Measuring range Resolution Measuring accuracy Voltage drop 600 μA1 0 01 μA 0 075 20 digits 0 2 mV μA 6 mA 0 1 μA 60 mA 0 001 mA 2 0 mV mA 600 mA 0 01 mA 0 15 20 digits 6 A 0 1 mA 0 3 20 digits 30 mV A 10 A2 0 001 A 0 3 30 digits Table 12 DC ranges A DC 1 If the safety measuring lines are short circuited the display value might have a negative residu...

Страница 29: ... V DC 1 5 V DC in the 600 Ω range Testing current approx 0 1 μA in the 6 MΩ range and approx 0 01 μA in the 60 MΩ range 4 3 4 Continuity test Overload protection 1 000 V AC V DC Measuring range Resolution Measuring accuracy 600 Ω 0 01 Ω 0 085 10 digits Table 15 Continuity test The integrated buzzer sounds and the display illumination flashes at a resistance lower than 100 420 Ω Response time 100 μ...

Страница 30: ...1 C x specified measuring accuracy x difference to reference temperature range C 4 3 7 Frequency ranges Mains frequency ranges Overload protection 1 000 V AC V DC 11 A AC A DC Measuring function range Sensitivity sinusoidal RMS Measuring range 6 V 0 4 V 10 Hz 50 kHz 60 V 4 V 600 V 40 V 10 Hz 30 kHz 1 000 V 400 V 10 Hz 5 kHz HFR 600 V 40 V 10 400 Hz HFR 1 000 V 400 V 600 μA 40 μA 10 Hz 5 kHz 6 mA 4...

Страница 31: ...re ranges Overload protection 1 000 V AC V DC Measuring range Resolution Measuring accuracy1 2 200 1 090 C 0 1 C 1 0 1 C 328 1994 F 0 1 F 1 0 1 8 F Table 21 Temperature ranges C F 1 Add the measuring accuracy of the wire temperature sensor type K to the specified measuring accuracy Measuring range 20 200 C 4 392 F Measuring accuracy 1 5 C 1 8 F 2 The measuring accuracy applies to stable ambient te...

Страница 32: ... readings and measuring errors For carrying out the tests and measurements please observe the associated measuring ranges and measuring accuracies stated in the chapter Measuring ranges page 26 Please note that the last selected function will be stored for each rotary switch position When setting the rotary switch again e g after switching the device on the last selected function will be preselect...

Страница 33: ...re measuring probe tips of the safety measuring lines or the bare contacts of the optional alligator clips Only touch the safety measuring lines in the area intended for your hands Connect the safety measuring lines to the correspondingly marked measuring jacks of the device and check them for tight fit Only use approved safety measuring lines Attach the protective caps to the contact tips of the ...

Страница 34: ...tive to voltage measurement you can switch to frequency measurement by pressing the Hz key V Press the blue Function key to set the desired coupling mode of the voltage measurement DC or AC DC As an alternative to voltage measurement you can switch to frequency measurement by pressing the Hz key mV Press the blue Function key to set the desired coupling mode of the voltage measurement DC AC or AC ...

Страница 35: ...e 1 Set the rotary switch of the device to switch position A mA or μA 2 Connect the safety measuring lines to the device page 33 3 Press the blue Function key to set the desired coupling mode of the current measurement DC AC or AC DC or depending on the jack used the measuring function 4 20mA As an alternative to current measurement you can switch to frequency measurement by pressing the Hz key 4 ...

Страница 36: ...he rotary switch of the device to switch position Ω 2 Connect the safety measuring lines to the device page 33 3 Press the blue Function key to set the function Resistance measurement Ω symbol is displayed or Continuity test symbol is displayed 4 Bring the safety measuring lines into contact with the measuring points Resistance measurement Read the measured value Continuity test When the buzzer so...

Страница 37: ...nce measurement or diode testing Procedure 1 Set the rotary switch of the device to switch position capacitance measurement 2 Connect the safety measuring lines to the device page 33 3 Press the blue Function key to set the function Capacitance measurement F symbol or Diode test symbol 4 Bring the safety measuring lines into contact with the discharged capacitor or the diode observing correct pola...

Страница 38: ...1 Set the rotary switch of the device to switch position Temperature measurement 2 Press the blue Function key to set the temperature unit C or F The selected temperature unit is shown on the digital display Please note that you can optionally disable a temperature unit page 25 3 Connect the temperature sensor to the device observing correct polarity and make sure that it is firmly connected Negat...

Страница 39: ...ght be applied even if it is not indicated by a visual or acoustic signal Do not use the Voltage indicator function to test for the absence of voltage 5 8 1 Non contact phase testing There is a detector located on the top right of the device This detector enables non contact detection of alternating fields Requirements Please observe the requirements for measuring page 32 Make sure that no voltage...

Страница 40: ... the VoltSense key again EF L appears on the digital display electric field with low sensitivity 3 Place the top right of the device near the measuring point If the device detects the phase of an earthed AC voltage the symbol EF H or EF L will disappear A bargraph indication and an acoustic signal indicate the strength of the electric field Practical tip Interruptions cable breaks in exposed cable...

Страница 41: ...AC 2 Connect the black safety measuring line to the COM jack of the device page 33 3 Press the VoltSense key to enable the Voltage indicator function EF H appears on the digital display electric field with high sensitivity If necessary you can reduce the sensitivity by pressing the VoltSense key again EF L appears on the digital display electric field with low sensitivity 4 Bring the safety measur...

Страница 42: ...Please contact your specialty retailer or the returns management for any repairs page 9 6 1 Maintenance schedule The following table provides an overview of all maintenance and servicing work that you must carry out permanently or at regular intervals Interval Measures Regularly as needed Cleaning the device page 43 As needed Replacing the batteries page 44 Every 12 months Calibrating the device p...

Страница 43: ...Using the wrong cleaning agents can damage the device Do not use any solvents abrasives or polishing agents Procedure 1 Clean the exterior of the device with a clean and dry cloth or a special cleaning cloth 2 Check the battery compartment To open and close the battery compartment follow the procedure given in the chapter Replacing the batteries page 44 3 In case of electrolyte contamination or wh...

Страница 44: ...n onto an anti slip surface 2 Unscrew the two screws of the battery compartment 3 Lift the battery compartment out of the device 4 Remove the discharged batteries from the battery compartment and dispose of them properly page 47 5 Insert the new batteries into the battery compartment observing correct polarity 6 Place the battery compartment back into the device and tighten the two screws 6 5 Cali...

Страница 45: ...Procedure 1 Place the device face down onto an anti slip surface 2 Dismantle the battery compartment page 44 3 Unscrew the six screws of the housing two screws each under the foldable stand and the battery compartment 4 Carefully lift the bottom part of the housing off the front part 5 Laterally lift one end of the defective fuse off the fuse holder by means of a slotted screwdriver 6 Remove the d...

Страница 46: ...0411 031 Overvoltage category only applies to the safety measuring lines additionally observe the limitations of the device With attachable protective cap CAT III 1 000 V to earth CAT IV 600 V to earth Without attachable protective cap CAT II 1 000 V to earth Protection class II double or reinforced insulation Contamination level 2 Max rated current 10 A Length 1 0 m Operation Max barometric altit...

Страница 47: ...6 Replacing the fuses 5235 05 2022 en BENNING MM 7 2 47 8 Disposal and environmental protection At the end of product life dispose of the unserviceable device and the batteries via appropriate collecting facilities provided in your community ...

Страница 48: ...imer 2 12 Display illumination 21 Disposal 47 Documentation 2 E Environmental protection 47 External conductor testing 41 F Frequency measurement 34 35 Frequency ranges 30 Function A HOLD 23 AutoV 24 Further setting options 25 HFR AC 21 HOLD 23 Hz 22 LoZ 24 Measuring range 24 MIN MAX 21 PEAK 22 Relative value 23 Selecting 20 Voltage indicator 22 Further information 7 Fuse Replacing 45 H History 8 ...

Страница 49: ...g manual 8 R Rear panel of the device 17 Resistance measurement 36 Resistance ranges 29 Return address 9 Returns management 9 Rotary switch 18 S Safety measuring lines Connecting 33 Scope of delivery 15 Securing 13 Selecting a function 20 Service Support Technical support 9 Standards applied 10 Symbols Device 11 Operating manual 11 T Target group 7 Technical data 46 Technical support 9 Temperature...

Страница 50: ...nting Subject to technical changes No liability accepted for printing errors BENNING Elektrotechnik und Elektronik GmbH Co KG Münsterstraße 135 137 D 46397 Bocholt Phone 49 2871 93 0 Fax 49 2871 93 429 Internet www benning de E Mail duspol benning de 5235 05 2022 en BENNING MM 7 2 50 ...

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