Extech Instruments PQ2071 User manual

USER GUIDE
Single or 3-Phase True RMS 1000A Power
Clamp Meter with Non-Contact Voltage Detector and
PC interface
Model PQ2071
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Introduction
Congratulations on your purchase of the Extech PQ2071 1/3-Phase CAT IV True RMS 1000A
Power Clamp Meter. The PQ2071 measures AC Current, Frequency, Temperature (Type K), and
Power (True Power, Apparent Power, Reactive Power, and Active Power). The PQ2071 also
includes a built-in non-contact Voltage Detector with LED alert. The USB PC interface offers storage
and recall (manually) of up to 99 sets of readings data. Proper use and care of this meter will
provide many years of reliable service. Please visit the Extech Instruments website
(www.extech.com) to check for the latest version of this User Guide and for Product Registration.
Safety
International Safety Symbols
This symbol, adjacent to another symbol or terminal, indicates the user must refer to the
manual for further information.
This symbol, adjacent to a terminal, indicates that, under normal use, hazardous voltages
may be present
Double insulation
This User Guide includes information concerning safety and cautions. Please read the information
carefully and observe all of the Warnings and Notes.
To avoid electric shock or personal injury, read the “Safety Information” and “Rules for Safe
Operation” carefully before using the Meter.
This device is a three phase handheld digital power clamp meter which has both the features of a
digital current meter and also a power measurement meter.
Unpacking Inspection
Check that the following items were included in the packaging. Please report missing or damaged
items to the point of purchase.
Item Description Qty
1 User Guide 1 piece
2 Colored Test Leads 3 pieces
3 Black Test Lead 1 piece
4 Colored Alligator Clips 3 pieces
5 Black Alligator Clip 1 piece
6 USB Interface Cable 1 piece
7 Software 1 piece
8 Storage case 1 piece
9 9V Battery 1 piece
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General Safety Information
This Meter complies with the IEC61010 standard for pollution degree 2, overvoltage category (CAT
III 1000V, CAT IV 600V), and double insulation.
Use the Meter only as specified in this operating manual, otherwise the protection provided by the
Meter may be impaired.
In this manual, a Warning identifies conditions and actions that pose hazards to the user, or may
damage the Meter or the equipment under test. A Note identifies general safety information that the
user must observe.
Rules for Safe Operation
Warning
To avoid possible electric shock or personal injury, and to avoid possible damage to the Meter or to
the equipment under test, adhere to the following rules:
Before using the Meter inspect the meter housing. Do not use the Meter if the housing is
damaged, open, or removed. Look for cracks or missing plastic. Pay particular attention to the
insulation around the connectors.
Inspect the test leads for damaged insulation or exposed metal. Replace damaged test leads
(identical model number or electrical specifications) before using Meter.
Do not apply more than the rated voltage as specified on the Meter.
When measurements have been completed, disconnect the connection between the test
leads and the circuit under test, remove the testing leads from the input terminals of the Meter
and turn the Meter power off.
To avoid electrical shock, do not attempt measurements while the Meter’s housing and / or
battery door is opened.
When the effective voltage exceeds 30VAC, special care should be taken while measuring as
a shock hazard exists at this voltage level.
Use the proper terminals and functions for the measurement in question.
Do not use or store the Meter in an environment of high temperature, humidity, explosive,
inflammable or one with a strong magnetic field.
Do not use the Meter if the meter is wet or if the user’s hands are wet.
When using the test leads, keep fingers behind the finger guards.
Replace the battery as soon as the battery indicator appears. With a low battery, the Meter
may produce false readings that can mislead the user and cause electric shock and personal
injury.
When opening the battery door, ensure that the Meter power is OFF.
When servicing the Meter, use only the same model number or identical electrical
specifications when acquiring replacement parts.
The internal circuit of the Meter must not be tampered with. Tampering with the internal
circuitry can cause meter damage and personal injury.
A soft cloth and a mild detergent should be used to clean the surface of the Meter when
servicing. Do not use abrasives or solvents when cleaning the meter; doing so can cause
corrosion, damage and can potentially compromise the meter’s safety features.
The Meter is suitable for indoor use only.
Turn the Meter off when it is not in use and remove the battery when the meter is to be stored
or unused for long periods.
Keep track of the battery age and replace batteries when necessary. Leaking batteries can
damage the meter.
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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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Display icons Description
USB PC Interface
L1 Phase 1
L2 Phase 2
L3 Phase 3
h Hours
m Minutes
S Seconds
PF Power Factor
KVA Active power
KWh Kilowatt hours
Hz Frequency(Hertz)
PG Phase angle
KVAr Reactive power
ΣW Sum of Wattage measurements
Low Battery
MAX-MIN Maximum and Minimum readings
Analog Bar Graph
CLR Clear Data
Negative symbol
High voltage symbol
AC AC voltage or current
RCL Recall stored data
MEM Data storage
FULL Data logger is full
HOLD Data hold is active
Figure 2
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Push-button Description
L1-L2-L3 Press L1-L2-L3 to step through the first phase, second phase, third phase, and the
sum of the watt measurements.
Press and hold L1-L2-L3 for at least two (2) seconds to enter 3P3W mode.
MR Press once to enter the Memory Recall mode, the MR icon will appear and the meter
will beep. Use the arrow buttons as described directly below to step through the 99-
reading internal memory.
ΣIn the Active power mode (kW dial position), the Σbutton is used to sum the multiple
measurements when testing 3 phase systems. Refer to the Active Power
Measurement section of this User Guide for details on using the sum button.
Press the backlight button to switch the backlight ON. The backlight will
automatically switch OFF after 20 seconds. Press the button to turn the backlight off
manually.
MAX-MIN Press to view the highest (MAX) reading; press again to view the lowest (MIN)
reading. This feature applies to voltage, current, active power and apparent power
ranges only. While the MAX or MIN icon is displayed, only the highest or lowest
reading is shown.
SAVE Press SAVE momentarily to store a single reading; the Meter will beep. The index
number shown on the left side of the secondary display will increase with each
stored reading. The maximum number of data points is 99. The Meter displays the
FULL icon when the memory is filled.
USB Measurement data will be sent to the PC when meter is connected to the PC and the
supplied software and driver is installed and running.
CLEAR In the Active Energy mode, press and hold CLEAR for at least one (1) second to re-
start the elapsed timer from zero.
For all other ranges, press and hold CLEAR for at least one (1) second to clear
(erase) the 99-reading internal memory.
▼/▲ When stepping through the sum of power measurements, use the ▼/▲ buttons to
switch the display from active power/reactive power to power factor/apparent power
modes.
In the MR mode, use ▼/▲ to scroll through the meter’s internal 99 reading
memory.
HOLD Press HOLD to enter the Hold mode, the Hwill appear and the Meter will beep and
the displayed reading will freeze. Press HOLD again to exit the Hold mode, the
Meter will beep and the Hicon will switch off.
Figure 3
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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 Voltage Measurements
AC voltage on Main Display (Frequency on Secondary Display)
The AC Voltage ranges are: 100V, 400V and 750V
The frequency range is: 50Hz~60Hz
Single phase - connect the L1 test lead to the
power wire and connect the COM lead to the
neutral wire.
3-Phase 4-wire - connect the COM lead to the
neutral conductor.
3-Phase 3-Wire - connect the COM lead to an
earth ground.
1. Insert the black test lead into the meter’s
COM input terminal.
2. Connect the other end of the black
(COM) test lead to the corresponding
neutral wire (single phase and 3P4W) or
for a 3P3W to one of the phase wires.
3. Single phase: Insert a test lead into L1
and connect it to the Power wire.
3Φ4Wire: Connect all 3 leads (red -L1), yellow-
L2, and blue-L3) into the L1, L2, & L3 meter
input terminals and connect each to a corresponding phase wire. (see fig 5)
3Φ3Wire: Connect L1 and L3 to the meter and then connect L1 to one phase wire and L3 to
the remaining phase wire.
4. Turn the rotary function switch to the VAC position to select Voltage + Frequency mode.
5. Press the L1-L2-L3 button to select the appropriate phase, the display shows the
corresponding phase symbol on the display. L1 is the first (single) phase, L2 is the second
phase, and L3 is the third phase.
6. The main display indicates the True RMS voltage and the secondary display indicates the
Frequency value.
7. 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 AC voltage True
RMS value.
8. Press MAX-MIN again and the LCD will display ‘MIN’ and the meter will indicate only the
minimum AC voltage True RMS value.
9. Press MAX-MIN again to exit the MAX-MIN mode and return to displaying the real-time AC
voltage True RMS value.
10. The display indicates ‘OL’ when the input voltage is greater than 750V rms.
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.
L1
COM
L2
L3
2
1
3
COM
Figure 5 (3P4W)
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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
Active, Reactive, and Apparent Power Measurements
There are three displays modes in this section as detailed in this section:
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)
WARNING: To avoid meter damage and personal injury do not measure RMS signals greater
than 750VAC or 1000AAC.
NOTES:
The maximum and minimum values are not available in this mode.
The summing of wattage values is only available in the KW mode.
When the measurement session has been completed, disconnect the test leads from the circuit
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
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