Mastech MS8218 User Manual page 14

MS8218 True RMS Multimeter
Introduction to the Meter
selected range. Press the RANGE key under the manual range for two seconds and then release it, the meter will go back to
the automatic range state.
• Linear frequency measurement: Pressing the ~ Hz key when the meter performing measurements on AC voltage or current
as well as on mixture signal of AC and DC, it will be capable to measure the frequency of the AC component. However it
has a certain requirements on the amplitude of the AC component.
• Logic impulse duty ratio measurement: logic impulse duty ratio refers to: (high level width/impulse cycle)
X
100%
• Diode measurement: during diode measurement the meter is indicating to the forward voltage drop of the diode
• Relative measurement: during relative measurement the meter remembers internally the instantaneously measured
value(called initial value)when pressing the REL b. key, and the later displaying value being:
present value - initial value
The relative measurement value reflects the changes of the measured value. It also can be used to take off the errors
brought about by lead resistance or distributed capacitance during measuring low resistance and low capacitance. Due to
subtraction calculation, negative value may appear during measuring AC current, resistance and capacitance.
• Maximum/minimum value measurement: by pressing MAXIMIN keys the meter can enter the maximum/minimum value
record state, and it will continuously update the maximum/minimum values based on the new measurement results. Pressing
the MAXIMIN key can display the maximum value, the minimum value and the maximum value-the minimum value in
cycles. After exiting the MAXIMIN measurement state the recorded maximum value/minimum values will disappear.
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