Mastech MS2205 Operation Manual page 12

Measuring power of 3-phase load
(for balanced load)
1.In the case of balanced load, process for measuring
power and power factor of 3-phase 4-line circuit is
the same as that for 3-phase 3-line circuit, and it is
not needed to use the middle line.
2. 3-phase total power parameters are referred to as
total active power, total passive power, total
apparent power, and total power factor of 3-phase
circuit. The meter cannot carry out 3-phase energy
measurement. In the case of balanced load,
measured result is accurate, while error of total power
will increase if power variation is large.
3.switch function-switching knob to kW/Φ (3 phase)
position, and connect test clamp to phase-1 test wire
of the load, and then connect V1 terminal / yellow
test probe, V2 terminal / black test probe, and V3
terminal / green test probe to the live line of phase 1,
phase 2, and phase 3, respectively, of the 3-phase
load without connecting the netural line.
4.After the test lines are properly connected, the meter
will automatically perform measurement and display
power, voltage, current, and whether a phase
is missing.
5.Press MODE button to display Var value of passive
power on LCD.
6.Press WATT button to display apparent power, power
factor (cos Φ), phase angle, and sinΦ; negative
power factor signifies that the load being tested is of
capacitor characteristics.
7.Press down I button, and current value, current peak
value and frequency will be displayed on LCD.
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8.Press down U button, and voltage value, voltage
peak value and frequency will be displayed on LCD.
9.Press SET button to display AUTO, and press ▲/▼
button to set the measuring range for voltage and
current, and then press SET button to return.
10.After measuring, press HOLD button to keep
showing the data on LCD, and press RES/SAVE
button to display the saved serial number, and then
press SET button to confirm it and return.
Phase sequence test
1.the meter will automatically test the phase sequence.
2.The display of RST
signifies normal phase sequence.
RST
signifies reversed phase sequence.
3.The display of
4.The display of RST signifies missing phase.
5.During measurement, press REC/SAVE button to show
MAX and MIN and record the results. Then, press REC/
SAVE button to transfer the test result to PC through
infrared communication wire.
Yellow
Black
Red
Measurement of power and power
factor of 3 - phase 3- line circuit
1PHASE
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