Mastech MS2203 User manual

3 PHASE DIGITAL POWER
CLAMP METER
USERS MANUAL

CONTENTS
Safety Precautions - - - - - - - - - - - - - - - - - - - - - - - - - - - 1
Safety Information - - - - - - - - - - - - - - - - - - - - - - - - - - - 1
Safety Symbols - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2
General Description - - - - - - - - - - - - - - - - - - - - - - - - - - 2
Feature - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2
Meter Layout - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4
Using The Selector - - - - - - - - - - - - - - - - - - - - - - - - - - 5
Using The Buttons - - - - - - - - - - - - - - - - - - - - - - - - - - 6
Lcd Display -- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 9
Making Measurements - - - - - - - - - - - - - - - - - - - - - - - 11
Measuring Ac Voltage - - - - - - - - - - - - - - - - - - - - - 11
Measuring Ac Current - - - - - - - - - - - - - - - - - - - - - 13
Measuring Single-Phase Circuit - - - - - - - - - - - - - 15
Measuring Three -Phase Four-Wire Circuit - - - - - - 19
Measuring Three -Phase Three-Wire Circuit - - - - - 24
Saving Measurement - - - - - - - - - - - - - - - - - - - - - - 24
Recalling Memory - - - - - - - - - - - - - - - - - - - - - - - 24
RS232C Date Interface - - - - - - - - - - - - - - - - - - - - 25
Input Voltage And Current - - - - - - - - - - - - - - - - - 26
Backlight Display - - - - - - - - - - - - - - - - - - - - - - - 26
Sketch Of Safety Holding - - - - - - - - - - - - - - - - - - 26
Curve Diagram Of Power - - - - - - - - - - - - - - - - - - 27
Low Voltage Indication - - - - - - - - - - - - - - - - - - - - 28
Replacing Batteries - - - - - - - - - - - - - - - - - - - - - - - - - 28
Specifications - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 29
Accessories - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 32
Safety Precautions
· Read these operation instructions thoroughly and completely before

operating your meter. Pay particular attention to WARNING. The
instructions in these warnings must be followed.
· You must be careful when working with voltages above 30V AC. Keep
fingers behind the probe barriers while measuring.
· Never use the meter to measure voltages that might exceed the
maximum allowable input value of any function measurement mode.
· Always inspect your meter and test leads before every use. If any
abnormal conditions exist: broken test leads, cracked cases, LCD not
reading, etc, do not attempt to take any measurement.
· Using the meter with the equipped test leads is only conform to safety
requirements. If you need instead broken test leads, you must replaced
with the same as type and electric specification.
· Never touch a voltage source when the test leads are plugged into a
current jack.
· Do not expose the instrument to direct sunlight, extreme temperature
or moisture.
READ THE INSTRUCTIONS BEFORE
USING THE INSTRUMENT
WARNING
Safety Information
Three-phase digital power clamp meter has been designed according
to IEC1010-1 and IEC1010-2-032 concerning safety requirements for
electrical measuring instruments and handheld clamps with pollution
degree 2, overvoltage category ( 600V CATⅢ).
- 1 –

Safety Symbols
Important safety information, refer to the operating manual
Dangerous voltage may be present.
Earth ground
Double insulation (Protection classⅡ)
Battery
General Description
Three-phase digital power clamp meter is a handheld aptitude meter with
power measurement, it is incorporated current meter and power
measurement instrument. The meter is composed of three channels:
voltage, current, power and single chip Microcontroller. It has powerful
measuring and data processing software, and complete to measure,
calculate and display of the 8 parameters: Voltage, Current, Active Power,
Power Factor, Apparent Power, Reactive Power, Active Energy,
Frequency. It has Stable capability, easy operation. It is especially
suitable for measurement and overhaul of the electric power equipment
and the power-supply circuit on the spot. The structure of the instrument
is pincers, it is very small, very light and portable, make measurement
easy and fast. To the power measurement user, the digital power clamp
meter which is used completely in three-phase system is one of the best
instrument.
Feature
1. For power measurement of 3-phase 3-wire circuit, 3-phase 4-wire
circuit, single-phase circuit.
2. The instrument can complete the true RMS value measurement. If
there is nonsinusoidal AC current input signal, it can accurately
measure the active current.
- 2 -

3. Using autorange switch circuit and modulus transducer which has 8000
count and high resolution, the instrument has high accuracy and easy
operation.
4. Minimum current of Active Energy measurement is 0.5A, it can
measure expending energy per hour of general electrical equipment.
Measurement and display five parameters of power: Active Power,
Apparent Power, Power Factor, Reactive Power, Active Energy.
5. Double display two parameters on each menu and store 28 groups of
measurement parameter.
6. Measure five power parameters of each phase and total power value in
three-phase measurement mode respectively.
7. Multifunctional button control, there are double scales analogue bar
graph to display fluctuation of voltage and current.
8. With PC RS232C interface and special WINDOWS data graphics
software.
9. Display measurement time and select tested voltage signal be power
supply for the clamp at one time in Active Energy measurement mode,
so the instrument can measure for long .
10. The instrument is a portable clamp meter. It is very light and
convenient to carrying .
- 3 -

Meter Layout
( Figure 1 )
1. Clamp Jaws Ф50mm
2. HOLD Button
Holds the display reading and “ " symbol is shown in the LCD
display, press this button again, the meter return to normal
measurement mode.
3. Function Selector Rotary Switch
Rotate the selector to any measurement function.
4. Function Selector Buttons
To select the measurement object.
– 4 –
DC
6
min
kVA
kVAr
kWh
COM
SAVE
60204010 30 80
MR
MEM
PF
MIN
MAX
RS232
CAL
AC
020
Time
FREQ
h
V3
V1 V2
MAX MIN
4
10040
Hz
5
7
HOLD
CLEAR
P
OFF
MS2203
MR
EX-
DIGI TAL POWER CLAMP
OFF
1
RS232
TIME
kWh
W
Ture RMS
AUTO RANGE
3
kW / PF
V / Hz
2
A
kVAr
kVA
W
3W 321 P
2
3
600kW
MAX
1000A
1
II
600V
CAT.I
MAX
8
600V
MAX
RS232
~
3OPTICALINTERFACE

5. Input terminal
V1: The input terminal for the first phase, using the yellow test lead
to connect.
V2: The input terminal for the second phase, using the green test
lead to connect.
V3: The input terminal for the third phase, using the red test lead to
connect.
COM: Common terminal, the earth input terminal for all measure-
-ment modes, using the black test lead to connect.
6. LCD Display
4 digits display, 7 segment LCD to display function mode, measured
value and symbols.
7. Trigger
Press the lever to open the transformer. When the lever is released,
the jaws will close again.
8. RS232C Data Interface
Your clamp meter can use a serial interface cable to communicate
with a computer. Refer to Figure 18 for complete instructions.
Using the Selector
Turn the meter on by rotating the selector to any function as following .
( Table 1. Introducing The Selector）
ITEM DESCRIPTION
POWER OFF. Turn the meter offOFF
EX- P EXTERNAL POWER SUPPLY. No use battery, select tested
voltage signal be power supply for Active Energy measure-
-ment for long at one time.
RECALL DATA. Recall saved data in the meter memory.MR
TOTAL POWER. For display total power value of three phase∑W
– 5 –

( Table 1. Introducing The Selector )
ITEM DESCRIPTION
THIRD MEASUREMENT CHANNEL. For V3 input terminal
measurement
Φ3
SECOND MEASUREMENT CHANNEL. For V2 input terminal
measurement
Φ2
FIRST MEASUREMENT CHANNEL. For V1 input terminal
measurement
Φ1
Using the buttons
( Table 2. Function Button)
ITEM DESCRIPTION
1 kW / PF Active Power, Power Factor Measurement Button.
Apparent Power, Reactive Power Measurement
Button.
2
3 kWh
TIME Active Energy, Time Measurement Button
4 Power Summation Button
5 V / Hz Voltage, Frequency Measurement Button
6 ACurrent Measurement Button
7 RS232 Data Transmit Button
8 CLEAR Clear Memory Button
9 Backlight Button
10
kVAr
kVA
MAX
Maximum Value Button/ Previous Record Button
11
MIN
Minimum Value Button/ Next Record Button
12 SAVE Data Save Button
– 6 –

1. kW / PF Active Power, Power Factor Measurement Button
Press kW / PF button to measure Active Power and Power Factor in
measurement mode. Then the LCD shows Active Power reading in
the primary display and Power Factor reading in the secondary
display.
2. kVAr
kVA Apparent power, Reactive Power measurement button
Press kVAr
kVA button to measure Apparent Power and Reactive
Power in measurement mode. Then the LCD shows Apparent Power
reading in the primary display and Reactive Power reading in the
secondary display.
3．kWh
TIME Active Energy, Time Measurement Button
Press kWh
TIME button to measure Active Energy in measurement
mode. Then the LCD shows Active Energy reading in the primary
display and measurement time of the Active Energy in the secondary
display.
4．Power Summation Button
Press button to sum up the measured value of current one
phase in three phase measurement mode; then measure the second
phase and press the button to sum up again; press the
button for the third phase after you getting the measured
value of the third phase on the display. So the meter will calculate the
sum in this three phase system automatically, you will rotate the
selector to ∑W at one time, then the display shows the total power
value.
5．oltage Measurement ButtonV
Press button to measure voltage of the circuit and display
the measured value in the LCD display.
– 7 –
V / Hz
V / Hz

6. A Current Measurement Button
Press A button to measure current of the circuit and display
the measurement value in the LCD display.
7. RS232 Data Transmit Button
Press RS232 button to transmit measured data to a computer by
special interface cable, you can record current measured value and
print reports and data trend curve drawing.
Before press the RS232 button to transmittal measured data, you
must connect RS232C interface cable to the clamp meter and a
computer, the communication function is working.
8. CLEAR Clear Memory Button
Press CLEAR button for three seconds to erase all measured data
in the meter memory in the measurement mode.
9. Backlight Button
Press button to turn the backlight on or off. When the back-
-light turned on over five seconds, it will turn off automatically.
10. MAX Maximum Value Measurement Button / Previous Record
Button
Press MAX button to measure maximum value in measurement
mode. The display shows current maximum value in the secondary
display.
When you turn the selector to MR, press MAX button to recall
previous memory location and display the data on the LCD. Once
pressing this button, the clamp meter recalls a memory location
previous current location.
11. MIN Minimum Value Measurement Button / Next Record Button
Press MIN button to measure minimum value in measurement
mode, the display shows current minimum value in the secondary
display.
– 8 –

When you turn the selector to MR, press MIN button to recall
next memory location and display the data on the LCD. Once
pressing this button, the clamp meter recalls a memory location next
current location.
12. SAVE Data Save Button
Press SAVE button to save current measured data to the meter in
measured mode. The meter can save 28 groups of measured data
into the meter at most.
Lcd Display
( Figure 2 )
1. Dangerous voltage symbol
2. Data holding symbol
3. First phase symbol
4. Second phase symbol
5. Third phase symbol
6. Three phase total power symbol
7. External power supply symbol
8. Battery symbol
- 9 -

9. Voltage unit (V), current unit (A), Apparent Power unit (kVA)
( For primary display )
10. Active power unit (kW)、Active Energy unit (kWh)
11. 4 digit display ( For primary display )
12. Frequency unit
13. Voltage unit (V), current unit (A),Apparent Power unit (kVA),
Reactive Power unit (kVAr) ( For secondary display )
14. Time unit : hour(h)、minute(min)
15. Overflow symbol
16. 100 graduate scale
17. 40 graduate scale
18. Bar graph
19. 4 digit display ( For secondary display )
20. Frequency unit
21. Time symbol
22. Negative sign of scale
23. Number of memory location symbol
24. Recall data symbol
25. Save data symbol
26. Minimum value symbol
27. Power factor symbol
28. Maximum value symbol
29. RS232C interface symbol
30. Calibrate symbol
31. Negative symbol
32. AC symbol
33. DC symbol
- 10 -

Making Measurements
Measuring AC Voltage
( Figure 3. Voltage Measurements)
1. Turn the selector to one of Φ1,Φ2,Φ3, refer to Table 3 to connect
the test leads to input terminals: Insert the black test lead into the
COM input terminal and one corresponding color test lead into the
corresponding input terminal.( Figure 3 )
（Table 3 Input Terminal Connections）
SELECTOR INPUT TERMINAL（+）INPUT TERMINAL（-）Phase
Φ1 V1 jack Yellow lead COM jack Black lead First phase
Φ2 V2 jack Green lead COM jack Black lead Second phase
Φ3 V3 jack Red lead COM jack Black lead Third phase
2. Connect test leads to the load, press V / Hz button, voltage
measured value is displayed in the primary display and current
frequency value of voltage is shown in the secondary display.
- 11 -
V
AC
MEM
302010
0
FREQ
FREQ
MEM
AC
1
20 40 60 80
0
40 V1 V3
V2
MIN
COM
SAVE
MAX
AUTO RANGE
TureRMS
AC
kW/ PF
V / Hz
100
Hz
Hz
V
MAX
600kW
1000A
MEM
1
-OFF P
2
1OFF
HOLD
V
Hz
MAX
IICAT.I
600V
kWh
TIME
RS232 CLEAR
10 20 30 40
W
FREQ
3
0
MR
EX
kVA
kVAr
A
Yellow
Black
V1
V
AC
Circuit
1

3. In voltage measurement mode, press MAX button, the LCD
displays “MAX“ symbol, then maximum value(TRMS) is shown in
the secondary display. Press MAX button again, the “MAX”
symbol is disappeared, the secondary display return to current
frequency value .
4. Press MIN button, the LCD displays “MIN” symbol, then
minimum value(TRMS) is shown in the secondary display. Press
MIN button again, the “MIN” symbol is disappeared, the
secondary display return to current frequency value.
5. For input voltage exceeds 600V, the display will show ”OL” symbol
and the bar graph is full.( Figure 4 )
( Figure 4. Voltage Exceeds 600V )
6. For input voltage exceeds 30V, the display will show “ ” for
safety.
7. There are two modes to show the bar graph in the LCD. You can
observe fluctuation range of measured voltage. The first mode is
0-20-40-60-80-100, the second is 0-10-20-30-40.
- 12 -
Black
Circuit
Hz
V
MEM
080604020
1
FR
AC
EQ
MAX
V2
100 V1
SAVE
COM
MIN
V3
A
kVAr
kVA
EX
3
10
2
P
-
0
MEM
V / Hz
kW / PF
1000A
600kW
MAX
AC
Ture RMS
600V
CAT.I II
MAX
MR
FREQ
W
AUTO RANGE
1
403020
CLEAR
RS232
TIME
kWh
Hz
V
HOLD
OFF
1
OFF
ACV
V1
Yellow

Measuring AC Current
( Figure 5. Current Measurements)
1. Turn the selector to one of Φ1,Φ2,Φ3.
2. Press the trigger to hook the clamp jaw around one conductor to
be measured. Press A button, the primary display reading is
current value(RMS) of the conductor. ( Figure 5)
3. To measure the maximum value of current, press
MAX
button,
the maximum value is shown in the secondary display. Press
MAX
button again to cancel maximum value measurement.
( Figure 6)
4. To measure the minimum value of current, press MIN button,
the minimum value is shown in the secondary display. Press
MIN button again to cancel minimum value measurement.
5. For current exceeds 1000A(RMS), the display will show “OL”
symbol. ( Figure 7)
- 13 -
CLEAR
W
RS232
AC
MEM
3
02010
A
4030
AUTO RANGE
0
MEM
V / Hz
kW/ PF
Ture RMS
AC
RS232
10 20 30
kVA
kVAr
A
2
3
kWh
TIME
RS232
1OFF
3
V1 V2 V3
MINMAX
600kW
MR
-
EX
OFF
P
1000A
MAX
40
A
COM
SAVE
1
2
3
Earth wire
Tes t ed c onduc t or
CAT.III
HOLD
MAX
600V

6. There are two modes to show the bar graph. You can observe the
fluctuation range of measured current. The first mode is
0-20-40-60-80-100, the second is 0-10-20-30-40.( Figure 5 and
Figure 6 )
( Figure 6. Maximum Value Of Current Measurements )
( Figure7. Current Exceeds 1000A )
- 14 -
1
80
AC
MEM
MAX
604020
0
3
W
100
A
A
100
3
80604020
AC
MEM
0
MAX
A
A
SAVE
COM
MAX MIN
V3V2
V1
CLEAR
OFF
1
RS232
TIME
kWh
3
2
A
kVAr
kVA
Ture RMS
kW / PF
V / Hz
AUTO RANGE
600V
MAXMAX
1000A
HOLD
P
OFF
EX-
MR
IICAT.I
600kW Earth wire
Tested conductor
3
2
1
MAX
CAT.I
600V
W
60
AC
MEM
40200
A
10080
kVA
kVAr kWh TIME
RS232 CLEAR
A
0
V2 V3
MINMAX
COM
SAVE
A
2
3
1OFF
3
20 40 60 80 100
V1
kW / PF
AUTO RANGE
Ture RMS
V / Hz
MEM
AC
RS232
3MR
-
EX
OFF
P
HOLD
MAX
600kW
1000A Earth wire
Tested conductor
3
2
II

Measuring Single-Phase Circuit
（Figure 8. Single-phase Power Measurements）
1. Hook the clamp jaws around the conductor of the loading or the
circuit. The clamped conductor is one phase which you want to
test in the three-phase circuit.
2. Turn the selector to one of Φ1,Φ2,Φ3, and refer to Table 3 to
connect test leads into input terminals which is corresponding to
the position of the selector. ( Figure 8)
3. After right connection, you can measure five power parameters of
single-phase circuit (Active Power, Power Factor, Apparent Power,
Reactive Power, Active Energy):
( 1. ) Active Power(kW) and Power Factor (PF) (Figure 8 )
a. Press
kW / PF button, the Active Power value is shown in
the primary display and the Power Factor value, “PF”
symbol are shown in the secondary display. When the
Power Factor value is negative, the loading is capacitive.
- 15 -
2
00
MEM
PF
20
AC kW
40 60 80 100
kWh
TIME
kVA
kVAr
kW / PF
MIN
6040
V2
2
MAX
20
V1
PF
AC
MEM
00
V3
V / Hz A RS232
Black
COM
SAVE
10080
kW
CLEAR
Green
Tested conductor
1OFF
OFF
2
EX
3
-P
AUTORANGE
W
MR
TureRMS
MAX
600kW
1000A
HOLD
MAX
IICAT.I
600V
Earth wire

b. The maximum measurement range of Active Power is
600kW. For exceeding the maximum value, the “OL”
symbol will be shown in the display. If test voltage
exceeds 600V or the test current exceeds 1000A, the
“OL” symbol will be shown in the display too. And the bar
graph is full.(Figure 9) The minimum input voltage is 20V
and the minimum input current is 5A, if it less than the
minimum input voltage and minimum input current, the
Active Power value is “0.00kW”.
c. Press MAX button, the maximum value of Active
Power is shown in the secondary display.
d. Press MIN button, the minimum value of Active
Power is shown in the secondary display.。
e. The bar graph “0-20-40-60-80-100” is shown.
（Figure 9.Current Exceeds 1000A Or Voltage Exceeds 600V）
- 16 -
20
00
MEM
10040 60 80
PF
AC
2
kW
V3
V2
MAX
V1
MIN
Black
COM
SAVE
OFF
RS232
EX
3
MR
AUTORANGE
W
TureRMS
1
OFF
2
-P
MAX
600kW
1000A
kVA
kVAr
kW / PF
PF
AC
MEM
00
V / Hz
kWh
TIME
6040
2
20
A
HOLD
MAX
IICAT.I
600V
10080
kW
CLEAR
Green
Earth wire
Tested conductor

( 2. ) Apparent Power (kVA)and Reactive Power ( kVAr )
a. Press kVAr
kVA button, the Apparent Power value is
shown in the primary display, Reactive Power value and
the bar graph “0-20-40-60-80-100” are shown in the
secondary display.（Figure 10）
（Figure 10.Apparent power measurements）
b. For input voltage less than 20V and input current less
than 5A, Apparent Power value is “0.00kVA”.
c. Press MAX button, the maximum value of Apparent
Power is shown in the secondary display.
d. Press MIN button, the minimum value ofApparent
Power is shown in the secondary display.
e. Reactive Power is not direct measuring parameter of
power, kVAr2=kVA2-kW2 is a formula to calculate Reactive
Power value. The value is calculated and shown
according to measured voltage, current and Active Power
in software.
- 17 -
3
AC
MEM
20
00 6040 10080
kVAr
kVA CLEAR
60
MIN
80 100
SAVE
TIME
kWh
A
V / Hz
00
MEM
AC
20
MAX
3
40
kW / PF kVAr
kVA
RS232
V3 COM
V1 V2
kVAr
kVA
OFF
600V
CAT.I II
MAX
HOLD
1000A
600kW
MAX
TureRMS
MR
W
AUTORANGE
P
-
3
EX
2
1
OFF
Black Red
Earth wire
Tested conductor

(3.) Active Energy (kWh) and Time（hmin）
a. In Active Energy measurement mode, voltage signal must
be input into V1 and COM terminal of the clamp meter
(Figure 11), and the selector must be turned to Φ1.So
the Active Energy measurement function is valid,
( Figure11. Active Energy measurements)
b. Press kWh
TIME button, starting value of the Active Energy
is “0.000kWh” and is shown in the primary display at first,
Active Energy measured time and the bar graph
“0-20-40-60-80-100” is shown in the secondary display.
For the time is longer, the measured value of Active
Energy is larger. If you need read the Active Energy value
sometime, press the HOLD button, so the measured
value display and the display of the measured time are
locked, but the Active Energy measurement is
continuing and timing in the clamp meter.After reading
the display, press HOLD button again to exit date hold
- 18 -
3
AC
MEM
40 60
00 20 80 100
kWh
minh
RS232
40
MAX
20
AC
MEM
00
V / Hz A
kWh
TIME
SAVE
10080
kWh
MIN
60
CLEAR
3
kW / PF kVA
kVAr
V2
V1 COM
V3
hmin
Black Yellow
OFF
1
2
EX
3
-P
AUTORANGE
W
MR
TureRMS
MAX
600kW
1000A
HOLD
ICAT.I
OFF
MAX
I
600V Earth wire
Tested conductor