Extech Instruments PQ2071 Manual de usuario

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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PQ2071-en-GB_V1.3 7/15

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.

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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