Extech PQ2071 Data Sheet
USER GUIDE
3-Phase True RMS 1000A Power Clamp Meter
with Non-Contact Voltage Detector and PC interface
Model PQ2071
2
Introduction
Congratulations on your purchase of the Extech PQ2071 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. Extech Instruments is an ISO-9001 certified company.
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
L1
L2
L3
h
m
S
PF
KVA
KWh
Hz
PG
KVAr
Σ W
MAX-MIN
CLR
PC Interface
Phase 1
Phase 2
Phase 3
Hours
Minutes
Seconds
Power Factor
Active power
Kilowatt hours
Frequency(Hertz)
Phase angle
Reactive power
Sum of Wattage measurements
Low Battery
Maximum and Minimum readings
Analog Bar Graph
Clear Data
Negative symbol
High voltage symbol
Figure 2
AC
RCL
MEM
FULL
HOLD
AC voltage or current
Recall stored data
Data storage
Data logger is full
Data hold is active
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Push-button Description
Figure 3
L1-L2-L3 Press L1-L2-L3 to step through the first phase, second phase, third phase, and the
MR Press once to enter the Memory Recall mode, the MR icon will appear and the meter
Σ In the Active power mode (kW dial position), the Σ button is used to sum the multiple
MAX-MIN Press to view the highest (MAX) reading; press again to view the lowest (MIN)
SAVE Press SAVE momentarily to store a single reading; the Meter will beep. The index
USB Measurement data will be sent to the PC when meter is connected to the PC and the
CLEAR In the Active Energy mode, press and hold CLEAR for at least one (1) second to re-
▼/▲ When stepping through the sum of power measurements, use the ▼/▲ buttons to
HOLD Press HOLD to enter the Hold mode, the H will appear and the Meter will beep and
sum of the watt measurements.
Press and hold L1-L2-L3 for at least two (2) seconds to enter 3P3W mode.
will beep. Use the arrow buttons as described directly below to step through the 99reading internal memory.
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.
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.
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.
supplied software and driver is installed and running.
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.
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.
the displayed reading will freeze. Press HOLD again to exit the Hold mode, the
Meter will beep and the H icon will switch off.
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