off the backlight .
VII.MEASUREMENT OPERATION INSTRUCTION
Please check 9V battery first ,set the knob to a proper position ,When battery is running low ,the LCD displays
symbol .Please pay attention to the
symbol beside the test leads jack .It’s a warning that the voltage
and current under test should not exceed prescribed value .
1.DCV MEASUREMENT (FIG.2)
1-1 Apply the red test lead to “V
Ω
mA”terminal and the black one to “COM” terminal.
1-2 Set the knob to a proper DCV range , multipled the test leads to the circuit under tested .
1-3 Read the measured value from the LCD .
NOTE:
Do not measure a voltage over 500V, or the circuit might
be damaged .If the voltage range is unknown beforehand ,
set the knob to the highest range ,then select a proper range
according to the displaying value.If LCD displays “1”,it
means over range , set the knob to a higher range . On each
range ,the input impedance of instrument is 10M
Ω
, such
load effect may lead to measuremnt error when measuring
high impedance circuit . If the circuit impedance under
tested is lower than 10k
Ω
,error can be ignored .(0.1% or
lower)
2.ACV MEASUREMENT
Note and operation instruction are the same with
DCV measurement .
3.DCA MEASUREMENT
（
FIG.3
）
3-1.Apply the red test lead to “V
Ω
mA” terminal or “10A ”
terminal ,the black one to “COM” terminal .
3-2.Set the knob to proper DCA range ,connect the meter
to the circuit under tested .
3-3. Read the measured value from the LCD .
NOTE:Even it have overvoltage protection when measure
current lower than 200mA. Do not measure DCA if the
voltage between input impedance and ground is over 60V
,otherwise it may damage instrument and measuring
