b) Voltage measuring “V”
Proceed as follows to measure direct voltages “DC” (V )
and alternating voltages “AC” V
):
Switch on the DMM and select measuring range “V”. For low
voltages up to 100 mV, select “mV”. Observe that the maximum
values (also see chapter Technical Data) must not be exceeded
while measuring.
- PlugtheredmeasuringlineintotheVmeasuringjack(7)and
theblackmeasuringlineintotheCOMmeasuringjack(8).
- Connectthetwomeasuringprodstotheobjecttobemeas-
ured (battery, circuit, etc.). The red measuring prod indicates
the positive pole, the black measuring prod the negative pole.
- The polarity of the respective measured value is indicated on
the display together with the current measured value.
If a minus “-” appears in front of the measured value for
direct voltage, the measured voltage is negative (or the
measuring lines are swapped). The voltage range “V DC/
AC” has an input impedance of >10 MOhm.
- Alwaysremovethemeasuringlinesfromtheobjecttobemeasuredaftercompletionofthemeasurementand
switch off the DMM.
c) Low-Pass Filter (HFR = High Frequency Reject)
Never use the low-pass filter option to test for presence of dangerous voltages! The present volt-
ages may be higher than indicated.
Always perform voltage measurement without the filter first to recolonise any possible dangerous
voltages.
This function can only be activated in the alternate voltage measuring range.
TheDMMisequippedwithanalternatingcurrentlow-passfilter.Thisisanalternatingvoltagemeasurementrouted
through a low-pass filter that blocks undesired voltages exceeding 800 Hz.
-
SwitchontheDMMandselectmeasuringrange“V”.Forlowvoltagesupto100mV,select“mV”.
- PlugtheredmeasuringlineintotheVmeasuringjack(7)andtheblackmeasuringlineintotheCOMmeasuring
jack(8).
- Pressthe“HFR”button.Thedisplayshows“HFR”.
- Connectthetwomeasuringprodstotheobjecttobemeasured(battery,circuit,etc.).Theredmeasuringprod
indicates the positive pole, the black measuring prod the negative pole.
- The polarity of the respective measured value is indicated on the display together with the current measured value.
- Pressthe“HFR”buttonagaintodeactivatethelow-passfilter.
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