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1 689 979 642

2014-11-03

Robert Bosch GmbH

22  |  MMD 302  |  Connection and operation

en

4.6.2 

Measurement cables can be wrapped

 

i

Measurement cables can be wrapped around the 
appliance and secured in the measurement cable 
holders.

4.6.3 

Erecting

 

i

With the protective rubber cover, the appliance can 
be erected on a level surface or suspended on a 
door or a nail.

 

 

4.6.4 

Protection

 

i

The measuring device can also be inserted back to 
front in the protective rubber cover in order to pro-
tect the LCD against scratching when not in use.

5.  Maintenance

 

!

The MMD 302 is not to be repaired. The MMD 302 has 
no parts of any use to the user. Repairs can only be 
performed by qualified customer service personnel.

5.1 

Cleaning

 

!

Always switch off the MMD 302 for cleaning.

The housing and the LCD of the MMD 302 are only 
to be cleaned using a soft cloth and neutral cleaning 
agents. Do not use abrasive cleaning agents and coarse 
workshop cloths. The rubber cover can be removed for 
cleaning purposes.
Do not use alcohol-based cleaning agents, as these 
could leave residue.

5.2 

Spare parts and parts subject to 

wear

Designation

Part Number

Cable set, red and black measuring cables

1 687 011 323

Connecting terminal, red

1 681 354 023

Connecting terminal, black

1 681 354 024

Protective rubber cover

1 680 591 026

1A/600V IR 10KA fast active fuse, Buss-

mann BBS-1 or similar rating

1 684 520 023

15A/600V IR 10KA fast active fuse, Buss-

mann KTK 15 or similar rating

1 684 520 024

Rubber seal for housing

1 681 006 031

5.3 

LCD difficult to read

If the LCD is difficult to read after the appliance has 
been switched on, you should check the batteries as 
follows:
Turn the measurement-mode switch (fig. 1, pos. 8) to 
the 

 position, and switch over to diode testing by 

means of the blue function button (fig. 1, pos. 2). The 
battery voltage is now displayed. The displayed voltage 
should be between 2.8 V and 3.2 V in order to guar-
antee safe operation of the MMD 302. The batteries 
should be changed if this value lies below 2.5 V.

Summary of Contents for MMD 302

Page 1: ...e Multimètre numérique es Manual original Multímetro digital it Istruzioni originali Multimetro digitale MIN MAX REL HOLD RANGE PRW RST H OFF V V ADPHz 4mA 40mA 400 mA A A mA V Hz MAX CAT III 600V DC AC REL MAX MIN MEM mVA C nuF MK Hz 0 10 20 30 40 AUTO H 456161 01_Ko COM MAX MAX 400mA FUSED FUSED 10 A cont 20 A 30sec ...

Page 2: ...unction button 19 3 5 3 MIN MAX button 19 3 5 4 REL button 19 3 5 5 HOLD button 20 3 5 6 PWR RST button 20 3 5 7 RANGE button 20 3 5 8 Measurement mode switch 20 4 Connection and operation 20 4 1 Alternating and direct current measurement 20 4 2 Acoustic continuity test and resistance measurement 20 4 3 Capacitance measurement and diode test 21 4 3 1 Capacitance measurement 21 4 3 2 Diode test 21 ...

Page 3: ... live parts e g with the ignition coil there is a risk of electric shock from flashover voltages caused by damaged insulation e g ignition cables which have been attacked by martens These apply to the secondary and primary sides of the ignition system the wiring harness with connectors lighting system Litronic as well as connection to the vehicle Safety measures Only connect to a properly grounded...

Page 4: ...components If high voltage components or high voltage wires are inexpertly handled there is a risk of fatal injury from high voltages and the possi ble transmission of current through the body Deenergization is only to be performed by a qualified electrician a qualified electri cian for specific tasks hybrid or a power systems engineer Work on vehicles with high voltage com ponents is only ever to...

Page 5: ...personnel such as mechanics electricians technicians and engineers in the area of automotive engineering 3 2 Application The MMD 302 is only intended for indoor use The MMD 302 is a measuring device for R R Direct and alternating voltage measurement R R Continuity test acoustic and resistance measurement R R Capacitance and diode test R R Frequency measurement R R Alternating and direct current me...

Page 6: ... mode switch pressing this function button switches between R R Continuity test and resistance measure ment R R Capacitance measurement and diode test R R Frequency measurement R R Direct and alternating current measurement 3 5 3 MIN MAX button R R The minimum memory is activated by pressing the button once the smallest measured value is saved and displayed R R The maximum memory is activated by p...

Page 7: ...ernating current up to 400 mA changeover between direct and alternating current by means of the blue function button A Measurement of direct and alternating current up to 10 A changeover between direct and alternat ing current by means of the blue function button 4 Connection and operation The following applies to all measuring modes and ranges The correct measuring mode must first be selected in ...

Page 8: ...onnect red measuring cable to test input for volt age measurement fig 1 pos 12 2 Turn measurement mode switch fig 1 pos 8 to ADP Hz position and switch over to frequency measurement by means of the blue function button fig 1 pos 2 Hz appears in the display 4 5 Current measurement Always observe the current limit values of the se lected measuring range and at the test inputs i i In the case of all ...

Page 9: ...g agents and coarse workshop cloths The rubber cover can be removed for cleaning purposes Do not use alcohol based cleaning agents as these could leave residue 5 2 Spare parts and parts subject to wear Designation Part Number Cable set red and black measuring cables 1 687 011 323 Connecting terminal red 1 681 354 023 Connecting terminal black 1 681 354 024 Protective rubber cover 1 680 591 026 1A ...

Page 10: ...s played value remains unchanged approx 3 V the F2 fuse is faulty and must be replaced 5 5 Changing the batteries The batteries may only be changed when the MMD 302 is not connected to a measurement object Fig 2 Changing the batteries 1 Housing upper section 2 Housing lower section 3 Protective rubber 4 Battery holder 5 1 5 V battery 1 Remove measuring cables from the measuring object and the MMD ...

Page 11: ... III The maximum permissible volt ages for CAT III 600 V must never be exceeded 5 6 Changing the fuses The fuses may only be changed when the MMD 302 is not connected to a measurement object Only fuses with the following specifications may be used Fuse F1 1 A 600 V IR 10KA fast acting fuse Buss mann BBS 1 Littelfuse BLS 1 A or similar rating Dimensions 10 3 x 35 mm Fuse F2 15 A 600 V IR 10KA fast ...

Page 12: ... 2kHz 400 Ω 0 1 Ω 40 Ω 399 9 Ω Resistance 400 Ω 4 kΩ 40 kΩ 400 kΩ 4 MΩ 40 MΩ 0 1 Ω 1 mΩ 10 mΩ 0 1 Ω 1 kΩ 10 kΩ 0 4 3 digit 0 4 2 digit 0 4 2 digit 0 4 2 digit 0 6 3 digit 1 5 5 digit 399 9 Ω 3 999 kΩ 39 99 kΩ 399 9 kΩ 3 999 MΩ 39 99 MΩ Diode test 3 0 V 1 mV Impedance 10 MΩ less than 100 pF Voltage drop maximal 800 mV for mA test input maximal 1 V for A test input Test input protection Fuse F1 1 A ...

Page 13: ...Robert Bosch GmbH Automotive Service Solutions Franz Oechsle Straße 4 73207 Plochingen DEUTSCHLAND www bosch com bosch prueftechnik bosch com 1 689 979 642 2014 11 03 ...

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