BENNING MM 5-2 044071 - Инструкция по эксплуатации - Страница 28

02/ 2020 

  BENNING MM 5-1/ 5-2



28

measuring lead to the jack 



 of the BENNING MM 5-1/ MM 5-2 and press 

the key (blue) 

4

 of the BENNING MM 5-2 to switch over to frequency mea-

surement (Hz). 

-   For frequency measurement in the current range, connect the red safety 

measuring lead to the jack 

L

 of the BENNING MM 5-2 and press the key 

(blue) 

4

 (press twice) to switch over to frequency measurement (Hz).

-  Remember the minimum sensitivity for frequency measurements using the 

BENNING MM 5-1/ MM 5-2!

-   

Contact the measuring points with the safety measuring leads 

and read the measurement result on the digital display 



 on the 

  BENNING MM 5-1/ MM 5-2.

See fig. 10:   

Frequency measurement

8.8  Temperature measurement 

(BENNING MM 5-2)

-   

With the rotating switch 



, select the desired function ( ) on the 

  BENNING  MM  5-2 

-  Press the blue key 

4

 to switch over to °F or °C.

-   Connect the temperature sensor (type K) to the COM jack 



 and to the jack 



 observing correct polarity.

-   Place the contact point (end of the sensor lead) on the point to be 

measured. Read the measurement value on the digital display 



 of the 

  BENNING  MM  5-2.

See fig. 11:   

Temperature measurement

8.9  Voltage indicator



The voltage indicator function is not intended for testing the 

absence of voltage. Even without an indication or acoustic 

signal, a dangerous contact voltage might be applied. Electrical 

danger!

The voltage indicator function is possible from each position of the rotary switch 

(except for switch position “OFF”). No measuring lines are required as voltage 

indicator (non-contact detection of an alternating field). The detector is located 

on the top side of the BENNING MM 5-1/ MM 5-2. Press the “VoltSensor” key 

5

and the measured value indication disappears. If a phase voltage is localized, 

the red LED 

N

 lights up and the symbol 



 is shown on the display.An indication 

is made in earthed AC current networks only! The phase can be determined by 

means of a single-pole measuring line.

Practical hint:

Interruptions (cable breaks) in cables lying around openly such as e.g. cable 

reels, fairy lights etc. can be traced from the feeding point (phase) to the point 

of interruption.

Functional range: ≥ 230 V

See figure 12:  Voltage indicator

8.9.1  Phase test

-   Connect the red safety measuring lead to the jack for 



 of the 

BENNING MM 5-1/ MM 5-2.

-   Bring the safety measuring line into contact with the measuring point of the 

system part and press the „VoltSensor“ key 

5

.

-   If the red LED 

N

 lights up and the symbol 



 is shown on the display, the 

phase of an earthed alternating voltage is applied to this measuring point 

(system part).

9. Maintenance



Before opening the   BENNING MM 5-1/ MM 5-2, ensure that it is 

not connected to a  source of voltage! Electrical hazard!

Any work required on the   BENNING MM 5-1/ MM 5-2 when it is under voltage 

must 

be done only by a qualified electrician. Special steps must be taken to prevent 

accidents

. Before opening the   BENNING MM 5-1/ MM 5-2, remove it from all sources 

of voltage as follows:

-  First remove both safety measuring leads from the measurement points.

-  Remove both safety measuring leads from the   BENNING MM 5-1/ MM 5-2

-  Turn the rotating switch 



 to “OFF”.

9.1  Securing the unit

Under certain circumstances, the safety of the   BENNING MM 5-1/ MM 5-2 can 

no longer be guaranteed. This may be the case if:

-  there are visible signs of damage on the unit,

-  errors occur in measurements,

-   the unit has been stored for a long period of time under the wrong conditions, and

-  if the unit has been subjected to rough handling during transport.