Mastech MS2108A, Operation Manual

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4.8.3 Turn the rotary selector to the required function and range to
be measured.
4.8.4 Connect the common test lead first and then the charged test
leads when making connection. Take away the charged test
lead first when disconnecting.
4.9 MEASURING AC CURRENT
WARNING
Beware of Electrocution.
Ensure that the test leads are disconnected from the meter
before making current clamp measurements.
4.9.1 Set the rotary selector to the 40A or 400A range position.
4.9.2 push the REL key make sure the LCD display zero if the
unsteady reading appear before measurement.
4.9.3 Press the trigger to open jaw. Fully enclose only one
conductor.
4.9.4 Take the reading on the LCD.
NOTE:
1) Do not put more than one cable into the jaw during test,
otherwise incorrect test value might be obtained.
2) For optimum results, center the conductor in the jaw.
3) At the manual range mode, when only ‘OL’ is shown on the
LCD, it means the measurement has exceeded the range. A
higher range should be selected.
4) If the scale of the value to be measured is unknown beforehand,
set the range to the highest.
5) “ ” means the maximum input current is 400A rms AC.
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4.10 MEASURING DC CURRENT
WARNING
Beware of Electrocution.
Ensure that the test leads are disconnected from the meter
before making current clamp measurements.
4.11.1 Set the rotary selector to the 40
A or 400A
range position.
4.11.2 Press the SEL key turn to DC current measurement mode..
4.11.3 Press the " REL " button, the meter will be set to zero.
4.11.4 Press the trigger to open jaw. Fully enclose only one
conductor.
4.11.5 Take the reading on the LCD.
4.11.6 Symbol “-” will be displayed on LCD if the direction of the
current is negative.
NOTE:
1) Do not put more than one cable into the jaw during test,
otherwise incorrect test value might be obtained.
2) For optimum results, press the " REL " button to make the
meter get into zero first.
3) For optimum results, center the conductor in the jaw.
4) At the manual range mode, when only ‘OL’ or ‘-OL’ is shown
on the LCD, it means the measurement has exceeded the range.
A higher range should be selected.
5) Under the manual range mode, when the scale of the value to
be measured is unknown beforehand, set the range to the
highest.
6) “ ” means the maximum input current is 400A DC.
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