Device description
4.2 Functions
5191 / 07/2021 en
BENNING CM 2-1
21
“ZERO (DC)” function
The “ZERO (DC)” function is intended to carry out a null balance before making direct current
(DC) measurements.
To carry out the null balance, press and hold the “AC HFR / DCA ZERO” key for approx. 2 s
until the “Δ” symbol appears on the digital display. The device must not be in the vicinity of a live
conductor.
4.2.2
“HOLD / MIN MAX” key
The “HOLD / MIN MAX” key has two functions.
“HOLD” function
The “HOLD” function is intended to hold the currently measured value.
Press the “HOLD / MIN MAX” key, to hold the currently measured value and the “H” symbol
appears on the digital display. Press the “HOLD / MIN MAX” key again to discard the held
measured value is discarded and the currently measured value will be displayed again.
“MIN MAX” function
The “MIN MAX” function is intended to determine and store the minimum and maximum
measured value during current or voltage measurement (DC and AC).
Press and hold the “HOLD / MIN MAX” key for approx. 2 s to enable or disable the function.
With the function being enabled, the “MaxMin”, “Max” or “Min” symbol appears on the digital
display. Press the “HOLD / MIN MAX” key to toggle the display.
• MaxMin: Currently measured value
• Max: Maximum stored measured value
• Min: Minimum stored measured value
4.2.3
Further setting options
The device offers further setting options. To change a setting, press one of the following keys
and simultaneously set any measuring function from the “OFF” position of the rotary switch.
• “AC HFR / DCA ZERO” key: Enables or disables the light sensor for automatic display
illumination (display “ON” or “OFF”)
• “HOLD / MIN MAX” key: Shows all symbols of the digital display
