Measurement Of Relative Value; Link Measurement; Rec Function; Function - Mastech MS2225A Operation Manual

4) When the meter is at power gear, short-press the FUNC
key in the current measurement interface to enter the
current effective value, harmonic, harmonic distortion
rate THD-R and harmonic distortion rate THD-F
measurement interface.
5) When the meter is at DC/AC gear, short-press the FUNC
key to switch between the DC voltage measurement and
AC voltage measurement interface.
6) When the meter is at resistance/diode/buzzer/
capacitance gear, short-press the FUNC key to switch
among resistance, diode, buzzer and capacitance
measurement.

4.6 Measurement of relative value

1) Short-press the LINK/REL/▼ key at AC current, AC/DC
voltage and capacitance gears to enter the relative
value measurement mode and store the current
displaying value in memory as the reference value. For
the sequent measurement, the displayed value is the
difference value between the input value and reference
value, i.e. REL▲ (current reading) = input value -
reference value.
2) This function of relative value measurement only can be
available in the manual measurement mode.

4.7 LINK measurement

At any gear (excluding OFF gear), long-press LINK/REL/▼
to turn on the Bluetooth of meter. Then open the
corresponding APP (iOS or Android) of the meter through
mobile phone or other equipment and search the signal to
link them. After the linking, the APP will display the
content displayed on meter in real time. Long-press the
LINK/REL/▼ key once again, the Bluetooth of meter will
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be turned off and the meter will be disconnected from the
APP.

4.8 REC function

The meter performs the functions of data recording and
Bluetooth data reading.
1) Data recording: the meter can save 1000 pieces of
data records. Long-press REC/RANG key to enable
the meter to record data. The REC indicator on LCD
will be on, and the meter will store the current
measurement data at the rate of 3 times/s. Long-press
REC key again to exit the data recording function. The
meter also can exit the data recording function when
the 1000 pieces of data are recorded or a key operation
or gear switching operation is performed.
2) Data reading: the meter cannot support the direct
reading of stored data, and it only support the reading of
the stored data with the Bluetooth function through a
specific APP on the mobile phone.
4.9 ▼function
Short-press LINK/REL/▼ in the harmonic measurement
interface at KW and W gears to scroll down, and to switch
between the 1st harmonic and 20th harmonic. At the KW
and W gears, short-press the function key in the
maximum/minimum value measurement interface to
scroll down, and switch and display the
maximum/minimum value.
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