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j) AC voltage measurement with 1 kHz low-pass filter
Never use the low-pass filter option to test for the presence of dangerous voltages!
The voltages present could be higher than indicated under some circumstances.
Always measure voltage without the filter first to identify any dangerous voltages.
The DMM is equipped with an alternating current low-pass filter. This is an alternating current
measurement which is led through a low-pass filter in order to block unwanted voltages above 1 kHz.
Proceed as follows for AC voltage measurement with the
low-pass filter:
1. Turn on the DMM and select the measurement range
" V
". Press the SHIFT/SETUP button (3) to switch to the
measurement range "
".
2. Insert the red test lead in the °CHzVΩ measuring socket (7),
the black test lead in the COM measuring socket (8) (Fig. 10).
3. Connect the two test prods with the object to be measured
(generator, circuit, etc.). The measuring value is indicated on
the display.
4. After the measurement has been completed, remove the test
leads and turn the DMM off.
12. RANGE FUNCTION, MANUAL MEASURING RANGE
SELECTION
The RANGE function allows the manual selection of the measuring range in some functions with
automatic measuring range selection (AUTO). At the threshold areas, it is advisable to fix the
measuring range in order to prevent unwanted switching.
Press the RANGE (-) button (10d) to switch to the manual measuring range selection. The indication
"AUTO" will go out in the display (if the manual measuring range selection is selected).
Set the desired measuring range by pressing the RANGE (-) button repeatedly.
To switch back to the automatic measuring range selection, hold down the RANGE (-) button for 2 s.
"AUTO" will again appear in the display (provided the autorange function is possible in this measuring
range).
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13. REL FUNCTION
The REL function allows a reference measurement to be made to avoid possible line losses such as
those occurring during resistance measurements. The currently displayed value is set to zero. A new
reference value has been set. The base value (Rel difference) is displayed next to the delta symbol
This measuring function is activated by pressing the REL/PC (Log/◄) button (10c).
display. The automatic measuring range function is deactivated.
To switch off this function, press the REL/PC (Log/◄) button again or change the measuring function.
The REL function is not active in the measuring ranges temperature, continuity
test, diode test, frequency, and in the low-pass filter voltage measurement.
14. HOLD FUNCTION
The HOLD function freezes the currently displayed measured value so that it can be read out or
logged.
When checking live conductors, ensure that this function is deactivated at the
start of the test. Otherwise, a false reading will result!
Fig. 10
To turn on the hold function, press the H/LIGHT (+/COMP) button (10a); an acoustic signal confirms
this action and
appears on the display.
To turn off the HOLD function, press the H/LIGHT (+/COMP) button again or change the measuring
function.
15. MAX. / MIN. / AVG. FUNCTION
The MAX/MIN function allows the recording and display of the maximum and minimum values during a
measurement. After activation of the MAX/MIN function, the maximum or minimum value will be retained,
as required. The current measurement can still be seen in the upper area of the display (below the date).
The MAX function is switched on by pressing the MAX/MIN (View/►) button (10b). The maximum value
will be continuously retained in the main display. The symbol
Pressing the button again switches to the MIN function. The minimum value will be continuously
retained in the main display. This value is identified by the symbol
Pressing the button again switches to the AVG function. The average value will be continuously
retained in the main display. This value is identified by the symbol
.
appears in the
appears in the display.
.
.
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