®
EXTECH
INSTRNTS
Single or 3-Phase True RMS 1 000A Power
Clamp Meter
CE
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176
TestEquipmentDepot.com
Description
Meter Description (front)
1 Transformer Jaw
2 Jaw Open Trigger
3 LCD Display
4 Voltage detector sensor
5 Voltage detector alarm light
6 Function dial switch (HOLD button)
7 Push-buttons (see list below)
8 L1, L2, L3 Input Terminal
9 PC Interface cable jack
Note: Battery compartment located on back of instrument
Figure 1
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Operation
NOTES: Read and understand all Warning and Caution statements in this operation manual prior
to using this meter. Set the function switch to the OFF position when the meter is not in use.
Non-Contact Voltage Detector
WARNING: Risk of electrocution. Before use, always test the voltage detector on a known live
circuit to verify proper operation.
1. Rotate the function switch to any measurement position.
2. Place the detector probe tip on the conductor or voltage source to be
tested.
3. The red LED light on the front of the meter (just below the clamp jaw)
will illuminate when voltage is detected.
Note: The conductors in electrical cord sets are often twisted. For best
results, move the probe tip along a length of the cord to assure placing the
tip close to the live conductor.
Note: The detector is highly sensitivity. Static electricity or other sources of
energy may randomly trip the sensor. This is normal operation.
Figure 4
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AC Current Measurements
Important Clamp Measurement Considerations
Place the conductor under test at the center of the transformer jaw for the best measurement
accuracy. This meter can only measure one conductor at a time. Do not clamp two or more
conductors. Clamp the wire so that the FACE of the meter is towards the source of power.
To measure AC Current, connect the meter as follows:
1. Set the Rotary switch to the AAC.
2. Clamp around one conductor.
3. The dual display indicates the AC current True
RMS value (main display)
Note: if the voltage leads are connected, the
TRMS AC voltage value will be displayed on the
secondary display.
4. To monitor the highest (MAX) and lowest (MIN)
readings, press the MAX-MIN button. The LCD
will now display ‘MAX’ and the meter will indicate
only the maximum TRMS AC Current value.
5. Press MAX-MIN again and the LCD will display
‘MIN’ and the meter will indicate only the
minimum TRMS AC Current value.
6. Press MAX-MIN again to exit the MAX-MIN mode and
return to displaying the real-time TRMS AC Current value.
7. The display indicates ‘OL’ when the input current is greater than 1000A.
Note: When the measurement session has been completed, disconnect the test leads from the
circuit under test and remove the test leads from the meter’s input terminals.
Figure 6
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Power Measurements
tive, Reactive, and Apparent Power Measurements
Ac
There ar
kW Active Power on Main Display (Phase Angle on Secondary Display)
kVA Apparent Power on Main Display (Reactive power on Secondary Display)
kVAR Reactive Power on Main Display (Apparent power on Secondary Display)
NOTES:
The maximum and minimum values
The summing of wattage values is only available in the KW mode.
When the measurement session has been completed, disconnect the test leads from
e three displays modes in this section as detailed in this section:
WARNING: To avoid meter damage and personal injury do not measure RMS signals greater
than 750VAC or 1000AAC.
are not available in this mode.
under test and remove leads from the meter’s input terminals.
Power connections and measurements shown for
3-Phase 4-wire
3-Phase 3-wire
Single and Split phase
the circuit
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176
TestEquipmentDepot.com
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3-Phase, 4-Wire Power Measurements
1. Connect the four voltage leads as shown in
Figure. 7
2. Clamp the transformer jaw around the power
conductors connected to the L1 voltage lead.
3. Set the meter to kW. The dual display shows
the Active power kW value and the Phase
Angle (PG) value.
4. Press the L1-L2-L3 button to choose the first
phase L1 (see figure 8).
5. Press the ∑ button to save and sum the measured value
for L1. (see Figure 8)
6. Move the clamp jaw to the power conductor connected to the L2 voltage test lead.
7. Press the L1-L2-L3 button to choose the first phase
L2. The primary display shows the kW for phase L1
and the secondary display shows the Phase angle
(PG).
8. Press the ∑ button to save and sum the measured
value for L2. (figure 8). The primary display shows the
kW for phase L2 and the secondary display shows the
Phase angle (PG).
9. Move the clamp jaw to the power conductor
connected to the L3 voltage test lead.
10. Press the L1-L2-L3 button to choose the first phase L3. The primary display shows the kW for
phase L3 and the secondary display shows the Phase
angle (PG).
11. Press the ∑ button to save and sum the measured
value for L3. (figure 8)
12. After recording the kW power measurement value for
the third phase, press and Hold the
∑ button for 1 second to display the 3 phase sum of
kW on the main display and kVA on the secondary
display. (figure 9)
13. Press the ▲ button to display the 3 phase sum of
kVAR on the main display.
14. Press and Hold the ∑ button for 1 second to return to normal operation.
11
Figure 7
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Single Phase and Split Phase Power Measurements
1. 1. Clamp the transformer jaw and around the Power wire.
2. 2. Connect the L1 test lead to this Power wire.
3. 3. Connect the COM test lead to the neutral/com wire.
4. 4. Set the Rotary switch to the KW, kVA or kVAR position
5. 5. Press the L1-L2-L3 button to choose phase L1.
6. 6. The display will show the power value.
The display will show the power value.
Single Phase Split Phase
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LCD Backlight Button
The LCD is equipped with backlighting for easier viewing, especially in dimly lit areas. Press the
backlight button to switch the backlight ON. The backlight will automatically switch OFF after
approx. 20 seconds. Press the button to turn the backlight off manually
Automatic Power OFF
In order to conserve battery life, the meter will automatically turn off after approximately 25 minutes.
To turn the meter on again, turn the function switch to the OFF position and then to the desired
function position.
PC Interface
The meter connects to a PC via the supplied infrared to USB interface cable. The infrared side of
the cable connects to the port at the bottom of the meter and the USB end connects to the PC.
The supplied software permits the user to collect up to 50,000 readings as they are taken. The
readings can be displayed as a list or graph within the software environment or exported to a
spreadsheet.
Instructions for use of the PC interface and software are supplied on the software disk included in
the meter package.
True RMS Measurement and Average Value Measurements
True RMS measures the effective value of sine-wave and non-sine wave input signals
Average measurements represent the mean value of sine wave signals
The clamp Meter uses the following formulas:
KW = KVA × Cosθ
KVA =
KVAr = KVA × Sinθ
22
KVArKW
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Maintenance
WARNING: To avoid electrical shock, disconnect the meter from any circuit, remove the test leads
from the input terminals, and turn OFF the meter before opening the case. Do not operate the meter
with an open case.
Cleaning and Storage
Periodically wipe the case with a damp cloth and mild detergent; do not use abrasives or solvents. If
the meter is not to be used for 60 days or more, remove the battery and store it separately.
Battery Replacement
1. Remove the Phillips head screw that secures the rear battery door
2. Open the battery compartment
3. Replace the 9 Volt battery
4. Secure the battery compartment
5. Dispose of batteries respons bly and according to all applicable laws
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Electrical Specifications
Current, Voltage, and Frequency
Function
AC Current
AC Voltage
Frequency
Range &
Resolution
40.0 AAC
100.0 AAC
400.0 ADC
1000 ADC
100.0VAC
750.0VAC
50 to 200Hz ± (0.5% + 5d)
Active Power (kW)
Current / Voltage
40A 4.00KW 16.00KW 30.00KW
Current
Ranges
100A 10.00KW 40.00KW 75.00KW
400A
1000A
Accuracy ±(3%+5)
Accuracy (% of
reading + digits)
± (2% + 5d) 1000A N/A 50-60Hz
± (1.2% + 5d) 750V rms
W = V x A x COSθ
100V 400V 750V
40.00KW 160.0KW 300.0KW
100.0KW 400.0KW 750.0KW
Overload
Protect
Voltage Ranges
Input
Impedance
10M
Frequency
range
50-120Hz 400.0 VAC
Resolution <1000KW: 0.01KW; 100kW: 0.1KW
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Apparent Power (kVA) VA = V x A
Current / Vol
Current
Ranges
Reactiv
Current / Voltage
tage
100V 400V
40A 4.00KVA 16.00KVA 30.00KVA
100A 10.00KVA 40.00KVA 75.00KVA
400A
1000A
Accuracy
Resolution <1000KVA: 0.01KVA; 100kW: 0.1KVA
40.00KVA 160.0KVA 300.0KVA
100.0KVA 400.0KVA 750.0KVA
Voltage Ranges
±(3%+5)
e Power (kVAR) Var = V x A x SINθ
Voltage Ranges
100V 400V
750V
750V
40A 4.00KVAr 16.00KVAr 30.00KVAr
Current
Ranges
Accuracy ±(3%+5)
Resolution <1000KVAr: 0.01KVAr; 100kW: 0.1KVAr
100A 10.00KVAr 40.00KVA 75.00KVAr
400A 40.00KVAr 160.0KVAr 300.0KVAr
1000A
100.0KVAr 400.0KVAr 750.0KVAr
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Power Factor PF = W / VA
Range Accuracy Resolution Measurement Considerations
0.3~1
(capacitive or
inductive)
0.3~1
(capacitive or
inductive)
±0.022 0.001
For reference only Current less than 10A or
Minimum current 10A
Minimum voltage 45V
Voltage less than 45V
Phase A
ngle PG = a cos (PF)
Range Accuracy Resolution Measurement Notes
O
0O ~90
(capacitive or inductive)
0O ~90O
(capaci ive or inductive)
att Hours (kWh)
Kilow
±2
O
O
1
Minimum current 10A
Minimum voltage 45V
For reference only Current less than 10A
Voltage less than 45V
Range Accuracy Resolution
1~9999kWh ±(3%+2) 0.001kWh
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General Specifications
Clamp jaw opening 57mm (2-1/4") approx.
Display Dual 4-digit (9999 counts) backlit LCD
Bargraph 100 units
Low Battery indication Battery symbol is displayed
Over-range indication ‘OL’ display
Internal Reading Memory 99 readings can be stored, recalled, and cleared.
External PC Memory 50,000 readings can be recorded on a connected PC running the
Measurement rate 2 readings per second, nominal
Input Impedance 10M (VAC)
AC bandwidth 50 to 200Hz (AAC and VAC)
AC response True rms (AAC and VAC)
Operating Temperature 5C to 40 C (41 F to 104 F)
Storage Temperature -20 C to 60 C (-4 F to 140 F)
Operating Humidity < 80% up to 31 C (87 F) decreasing linearly to 50% at 40 C (104 F)
Storage Humidity < 80%
Operating Altitude 2000meters (7000ft) maximum
Battery One (1) 9V Battery (NEDA 1604)
Auto power OFF After approx. 25 minutes
Dimensions & Weight 292 x 95 x 38mm (11.5 x 3.75 x 1.5”); 522g (18.4 oz)
Safety For indoor use and in accordance with the requirements for double
supplied PC software. Readings can be exported to a spreadsheet.
insulation to IEC1010-1 (2001): EN61010-1 (2001) Overvoltage
Category IV 600V and Category III 1000V, Pollution Degree 2
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176
TestEquipmentDepot.com
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