Mastech MS2109A User Manual

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1) Clamping two or more leads of circuit to be tested
simultaneously will give invalid readings.
2) To get accurate readings, place the lead to be
tested at the center of clamp head.
3) “ ”indicates that maximum input AC current is 600 A.
4) To improve measurement precision, in the DC
current measurement state, because the earth and
other magnetic fields have an impact on DC current
measurement precision, if the LCD display is not
zero, place the clamp head vertical to conductor to
be measured, then press REL back to zero, then
measure.
4.11 Voltage Measurement
Note:
Electric shock hazard.
Pay special attention to avoid shock when
measuring high voltage.
Don't input voltage more than AC 600 V RMS.
Warning
1) Insert black probe to COM jack, insert red probe to
INPUT jack, choose appropriate measuring range.
2) Place transfer switch in voltage position At
this time, the meter is DC voltage measurement
state. To measure AC voltage, press SEL key to
enter AC voltage measurement state.
3) Connect the probe with voltage source or both
ends of load in parallel.
4) Read the voltage on the LCD.
Note:
1. In the small voltage measuring range, the probe is
not connected with the circuit to be tested, and the
meter may have fluctuating readings. This is normal
and is caused by the meter's high sensitivity. When
the meter is connected with the circuit to be tested,
you will get actual measured value.
2. “ ”indicates that maximum input voltage is 600V
AC or 600V DC.
3. If the reading measured by the meter is more than
750V AC or 1000V DC, it will send out “beep” alarm.
4.10 Current Measurement
Electric shock hazard.
Remove the probe from the meter before
measuring with current clamp.
1) When measuring switch is placed to position A, the
meter is in AC current measurement state. Choose
the appropriate measuring range. If you can't
determine the size of current to be tested, choose
the maximum measuring range, then choose lower
ranges until the correct range is displayed. If you
want to measure DC current, press SEL key to enter
DC current measurement state.
2) Hold the trigger, open clamp head, and clip one lead
of measurement circuit to be tested into the clamp.
3) Read the duty ratio value on the LCD display.
Warning
V

Mastech MS2109A Specifications

General

Brand	Mastech
Model	MS2109A
Category	Measuring Instruments
Language	English