Mastech MS8228, Operation Manual, Page: 14 / 26

DIGITAL MULTIMETER
OPERATING INSTRUCTION NTS
At the same time, the lights at the “10A” and “COM”
jacks will flash to remind the user to plug in the test
leads there.
4.1.4 At IR-T range, whether the test leads are plugged in or
otherwise, the meter will make no response because
no signal input is required from the input terminals.
4. 4. 4. 4.2 2 2 2 HOLD HOLD HOLD HOLDING ING ING ING READINGS READINGS READINGS READINGS
1
）
Press the “HOLD/B.L” button to hold the readings while
taking measurement, and the value on the display will
be held.
2
）
Press the “HOLD/B.L” button again to release the
READING HOLD function.
4.3
4.3 4.3
4.3 SWITCHING
SWITCHING SWITCHING
SWITCHING FUNCTION
FUNCTION FUNCTION
FUNCTIONS
S S
S
1
）
Press the " SELECT " button to switch between AC and
DC measurement at the current and voltage ranges.
2
）
Press the " SELECT " button to switch among
resistance, diode and continuity ranges.
4.4 4.4 4.4 4.4 SWITCHING SWITCHING SWITCHING SWITCHING RANGE RANGE RANGE RANGES S S S
1
）
When the meter is turned on, it is at the auto range
mode for measuring current, voltage and resistance.
2
）
Press the "RANGE" button for manual range mode.
The range will go up one level at each press and return
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DIGITAL MULTIMETER
OPERATING INSTRUCTION NTS
to the lowest level when the highest level is reached.
3
）
Press the "RANGE" button for two or more seconds to
return to the auto range.
4.5 4.5 4.5 4.5 SWITCHING SWITCHING SWITCHING SWITCHING BETWEEN BETWEEN BETWEEN BETWEEN FREQUENCY FREQUENCY FREQUENCY FREQUENCY/DUTY /DUTY /DUTY /DUTY
1
）
Press the “Hz/DUTY” button at the frequency range to
switch between frequency and duty measurement.
2
）
When the meter is at the voltage and current ranges,
press the “Hz/DUTY” button to measure the frequency
of the voltage or current signal. Another press on the
“Hz/DUTY” button will change into the Duty range for
measuring the duty cycle of the voltage or current
signal.
3
）
Press the “Hz/DUTY” again to resume the meter to
voltage and current measurement at the manual range
mode.
4.6 4.6 4.6 4.6 SWITCHING SWITCHING SWITCHING SWITCHING TO TO TO TO RELATIVE RELATIVE RELATIVE RELATIVE MEASURE MEASURE MEASURE MEASUREMENT MENT MENT MENT
1
）
Press the “REL” button to enter the relative
measurement mode when taking measurements.
The initial reading will resume zero.
2
）
At the relative measurement mode, the existing reading
will be stored in the memory as reference value for later
measurements. The displayed reading is the difference
between the input value and reference value. i.e.
REL (present reading) = input value - reference value
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