Instructions

5.4 Current or frequency measurement
Operation
5191 / 07/2021 enBENNING CM 2-130
5.4 Current or frequency measurement
Requirements
• Please observe the requirements for measuring [}page26].
• Make sure that no voltage is applied to the jacks of the device (“COM” and “+”). Remove
any connected safety measuring lines.
• Current ranges [}page24] and frequency ranges [}page25]
Figure12: Current or frequency measurement
Procedure
1. Set the rotary switch of the device to switch position “Hz ”.
2. Press the “ACHFR/ DCAZERO” key to set the desired measuring function (frequency, AC
or DC).
3. For DC measurements: Press and hold the “ACHFR/ DCAZERO” key for approx.2s to
switch the device into the initial mode by means of a null balance. The “Δ” symbol is shown
on the digital display.
4. Operate the opening lever and clamp the single-wire live conductor centrally with the
measuring clamp.
5. Read the measured value on the digital display.