13
Zero adjustment on the 30 nF measuring range
When measuring small capacitrance values on the 30 nF range, the internal resistance
of the multimeter and the capacitrance of the leads can be eliminated by zero adjustement.
Connect the test leads to the meter without device under test.
Briefly press the yellow multi-function pushbutton (5) diplaying"00.00"(+1 digit) on the LCD
and by a flashing decimal point. The capacitance measured at the instant the pushbutton is
pressed is used as reference value (max.200 digits). It is automatically deduced from the
values measured thereafter.
Zero adjustment can be cleared
By pressing the yellow multi-function pushbutton (5) for a long time clearance is
acknowledged by the two sound signal.
By switching the multimeter off.
1
3.
Frequency measurement
Frequency measurement is possible on all voltage measuring ranges in AC and DC modes.
Set the function selector switch (6) to v~,v-
Connections are made the same way as for voltage measurement.
Briefly press the yellow multi-function pushbutton (5)
The multi meter switches to frequency measurement. The frequency is displayed on
the LCD.
See section 16. Specifications"for the lowest measurable frequencies and the
maximum permissible voltages.
Changing over between voltage, frequency and duty cycle
measurement.
Repeated brief pressing of the yellow multi-function switch (5) changes the measuring
function in the following order:
Voltage Frequency duty cycle Voltage
From frequency or duty cycle measurement, directly switching back to voltage
measurement is possible.
By pressing the yellow multi-function pushbutton (5) for a long time. The meter
acknowledges this by two sound signals. The voltage measuring range last
selected is maintained.
14. Duty Cycle measurement
By operating the function selector switch(6).
With duty cycle measurement, we can determine the ratio of pulse duration to cycle
time of recurring square-wave signals.
Set the function selector switch (6) to V~ or V-
Connections are made in the same way as for voltage measurement
Briefly press the yellow multifunction pushbutton (5) twice. The meter switches to duty-
cycle measurement. The duty cycle that is the percentage pulse duration of a signal is
displayed on the LCD in %
That is:
Pulse duration
Duty cycle (%) = ------------------------ X 100
Cycle duration
: Input applied frequency must remain constant during the duty cycle
measurement. Change-over between voltages,frequency and duty cycle factor
measurement is done as described in the preceding section.
Notes