16
3.11 Linear Frequency Measurement
The measurement range is from 5Hz to 200KHz
1. When performing voltage or current measurement, in case of measured value
being AC or including AC elements, it is possible to measure and display the
alternating frequency by pressing the ~
~H
Hz
z key. However it has certain
requirements for the amplitude of alternating signal and the meter has varied
requirements for signal amplitude when it is in different ranges, for
information of which please refer to the table below.
2. If the position of dial is in A
A (AC V or DC V) mode, after pressing the ~
~H
Hz
z key
the indicator of range will indicate the meters present voltage range. In
addition, it is possible to change the range by pressing the ‘RANGE’ key to
meet the different voltages.
3. Press the ~
~H
Hz
z key again to exit linear frequency.
N
No
otte
es
s: During ampere measurement, due to the very small sample resistor, and
the very weak frequency signal produced, so only when current reaching as large
as over 5A can the frequency be measured.
3.12 Relative Value Measurement
Except for frequency, duty ratio and diode measurements, all other measurements
can employ relative measurement.
1. Press ‘R
RE
EL
L
∆∆
’ key to enter relative measurement and the meter will record the
initial value.
The later displayed value is: P
Prre
es
se
en
ntt m
me
ea
as
su
urre
em
me
en
ntt v
va
allu
ue
e -- IIn
niittiia
all v
va
allu
ue
e
2. Press ‘R
RE
EL
L
∆∆
’ again to exit relative measurement. Changes of measurement
value may be found in relative measurement which can also be used for the
small resistance and the small capacitance measurements, for example, when
performing resistance measurement, connect the red testing line and the
black testing line in short, press the ‘R
RE
EL
L
∆∆
’ key to record the values of
resistance (resistance of both the red and black lines), and after that
performing resistance measurement again the lead resistance will have been
RANGE
SENSIBILITY (SINE WAVE)
500mV
100mV
5V 0.5V
50V
4V
500V
40V
1000V
400V
5000
µ
A
1mA
500mA
100mA
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