Notes
n
Connect polarized capacitors with the “ ” pole to the “ ” socket.
n
Resistors and semiconductor junctions in parallel with the capacitor
falsify the measured results!
Zero adjustment on the 6.600 nF measuring range
When measuring small capacitance values on the 6.600 nF range, the
internal resistance of the multimeter and the capacitance of the leads
can be eliminated by “REL” function
.
n
Connect the test leads to the meter without device under test.
n
Press and hold PEAK(2) and press the AUTO/MAN(4) pushbutton.
The meter enter into the “REL” mode , “REL”symbol will be displayed
on to the LCD. Also “00.00” (+1digit) will displayed on main display
& the capacitance measured at the instant the push button is
pressed is displayed on sub display & used as reference value. It
is automatically deducted from the values measured there after.
The REL function can be cleared
n
By pressing and holding PEAK push button and then pressing AUTO/MAN
key. This is acknowledged by sound signals.
n
By switching the multimeter off.
14. Frequency and Duty measurement (Multimeter
NP10-5
,
NP10-6)
14.1 Frequency measurement
n
Set the function selector switch (6) to the “Hz”
n
The multimeter switches to frequency measurement. The frequency
is displayed on the main Display and duty cycle is displayed on to
the Sub display.
See section "16. Specifications" for the lowest measurable
frequencies and the maximum permissible voltages.
n
Connections are made the same way as for
voltage measurement.
14.2 Duty cycle measurement
With duty cycle measurement, it can determine the ratio of pulse duration
to cycle time of recurring square-wave signals.
n
Set the function selector switch (6) to the “Hz”.
n
The multimeter switches to frequency measurement. The frequency is
displayed on the main Display and duty cycle is displayed on to the
Sub display.
n
The duty cycle-that is the percentage pulse duration of a signal-is
displayed on the LCD in %
n
That is: Duty cycle (%) =
Pulse duration x 100
Cycle duration
16
