Extech Extech PQ3450 Manual

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User Guide

3-Phase Power Analyzer/Datalogger

MODEL PQ3450

Table of Contents

1.0 INTRODUCTION

1-1 Features ..................................................................................................... 3

1-2 Safety .......................................................................................................... 4

2.0 SPECIFICATIONS

2-1 General Specifications ................................................................................ 5

2-2 Electrical Specifications ............................................................................... 6

3.0 METER DESCRIPTION..................................................................................... .7

4.0 METER BASICS AND THE SETUP MODE

4-1 Initialization Screen ..................................................................................... 8

4-2 Measurement Screen Example ................................................................... 8

4-3 Keypad Summary ........................................................................................ 9

4-4 Setup Mode Basics ..................................................................................... 9

4-5 Setup Mode In Detail ................................................................................. 11

5.0 POWER MEASUREMENT PROCEDURES

5-1 1Φ 2W (single phase two wire) measurement ......................................... .17

5-2 1Φ 3W (single phase three wire) measurement ....................................... .18

5-3 3Φ 3W (three phase three wire) measurement ........................................ .19

5-4 3Φ 4W (three phase four wire) measurement .......................................... .20

5-5 CT and PT measurement ......................................................................... .21

5-6 Data Logger ............................................................................................... 22

5-7 Data Hold ................................................................................................. .23

5-8 Display Backlight key ............................................................................... .23

5-9 LOWBAT (Low Battery) screen ................................................................ .23

5-10 Measurement Definitions ........................................................................ .24

5-11 Reset Button ........................................................................................... .24

5-12 Watt-Hour ZERO Function ..................................................................... .24

6.0 MAINTENANCE

6-1 Cleaning .................................................................................................... 25

6-2 Battery Replacement ................................................................................. 25

7.0 PC INTERFACE

7-1 Download Data from SD Card ................................................................... 26

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1.0 Introduction

Congratulations on your purchase of the Model PQ3450 Power Analyzer/datalogger. This
instrument is fully tested and calibrated prior to delivery; proper use and care of this meter will
provide years of reliable service.

1.1 Features

 Large dot-matrix, numerical, backlit LCD



Full system analysis with more than 30 parameter

o

Voltage (phase-to-phase) and Voltage (phase-to-gr
Current (Amps) phase-to-g

o

KW / KVA / KVAR / PF (p

o

o

KW / KVA / KVAR / PF (system)

o KWH / KVAH / KVARH / PFH (sys
o Phase angle



600.0VAC input with CAT III-600V safety



Adjustable Current Transformer (CT) and Potential Transformer (PT) ratio for high po
distribution systems



Log up to 30,000 reading on removable SD memory card in Ex

Wide sampling rate range (from 2





Easy-to-use onscreen menu

 Easy-to-hold rugged over-molded

round

hase)

tem)

rating

seconds up to 2 hours)

housing

s:

ound)

cel® format

wer

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1.2 Safety

CAUTION: Risk of electric shock. Do not attempt to open or disassemble the meter while



taking measurements

CAUTION: Do not attempt to measure Voltage or Current that exceeds specified limits



Do not operate this instrument in wet or dusty environments.



Do not operate this instrument in the presence of combustible or explosive gas



Do not touch exposed metal parts or unused terminals.



Consider the use of rubber gloves in operation.



Do not operate in excess of AC 500V (Phase to Neutral), or AC 600V (Phase to Phase)



Do not operate this instrument if it appears to be malfunctioning



Remove the test leads from the meter before opening the battery compartment cover



When cleaning, use only a dry cloth to wipe the meter housing. Do not use liquids of any



kind to clean the meter

Safety Symbols:



CAUTION DOUBLE INSULATION RISK OF ELECTRIC SHOCK

Environmental Conditions

 Installation Category III 600V

 Pollution Degree 2

 Altitude limit: 2000m

 Indoor use only

 Relative Humidity maximum: 80%

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2.0 Specifications

2.1 General Specifications

Circuit Custom single-chip microprocessor LSI circuit

Display

Measurements V (voltage phase to phase)

Wire
configurations

Voltage ranges 10 ACV to 600 ACV (Auto Range)

Current ranges Current probe input signal voltage (ACV):

Safety
standard

ACV input impedance 10M ohms

Range select ACV Auto Range

Clamp frequency
response

Over-load protection ACV 720 ACV RMS

LCD Size: 81.4 X 61 mm (3.2 X 2.4”)
Dot Matrix backlit LCD (320 X 240 pixels)

V (voltage phase to ground)
A (Current Phase to ground)
KW / KVA/ KVAR / PF (Phase)
KW / KVA/ KVAR / PF (System)

Power factor
Phase angle

Frequency

1P/2W, 1P/3W, 3P/3W, 3P/4W

200mV(120mV) /2.25V/300mV/500mV/1V/2V/3V
Current probe input current range (ACA):
20A/200A/2000A(1200A)/150A/1500A/30A/300A/3000A/60A/600A/6000A
Note that the meter has universal probe compatibility

IEC1010 CAT III 600 V

ACA Manual Range

40 Hz to 1 KHz

Over-range

Under-range "UR" is displayed

Data Hold Freezes displayed reading

Data Recording SD memory card

SD Card size limits SD Cards up to 2G; SDHC Cards up to 16G

Sampling Time Approx. 1 second (LCD) / 2000 samples per period

"OL" is displayed; Data on SD card will read ‘9999’ or ‘999’ for over-range
data

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Datalogger

Data Output

Operating Temperature 0 to 50oC (32 to 122oF)

Operating Relative
Humidity

Power Supply Eight (8) ‘AA’ 1.5VDC batteries or AC 9V power adapter

Meter Power
Consumption

Weight 975g (2.1 lbs.) with batteries

Dimensions

Real time data logger saves data to SD memory card for download to PC
(data files open directly to spreadsheet)

Sampling rate: From 2 seconds to 7200 seconds (2 hours)

Max. File capacity: 30,000 records

RS232 port

80% Relative Humidity max.

250 mA DC

225 X 125 X 64 mm (8.86 X 4.92 X 2.52“)

2.2 Electrical Specifications (45 to 65Hz; 23±5°C)

Function

AC Voltage 10.0V to 600.0V 0.1V ± (0.5% + 0.5V + 5 digits)

AC Current <20.0A

20.01A to 200.0A

>200.0A

Power Factor 0.00 to 1.00 0.01 ± 0.04

Φ Phase Angle -180° to 180° 0.1° ± 1° *ACOS(PF)

Frequency 45 to 65Hz 0.1Hz 0.1Hz

Power

Watt Hour

*Meter accuracy only. For system accuracy add the accuracy of the clamp used.

*PF∑ :
For 3Φ4W, 3Φ3W, 1Φ3W
PF∑ = P∑ / S∑
For 1Φ2W
PF1 = P1 / S1

Range Resolution Accuracy* (of reading)

0.0 to 3.6MW

0.0 to 3.6MVA

0.0 to 3.6MVAR

0.0 to 3.6MWH

0.0 to 3.6MVAH

0.0 to 3.6MVARH

0.001 < 10 A

0.01 ≥ 10A

0.01 < 100 A

0.1 ≥ 100A

0.1 < 1000A
1 ≥ 1000A

0.001k to 0.001M ± (1% + 8 digits)

0.001k to 0.001M ± (1% + 8 digits)

± (0.5% + 0.1A + 5 digits)*

± (0.5% + 0.5A + 5 digits)*

± (0.5% + 5A + 5 digits)*

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3.0 Meter Description

Meter Front

3-1 LCD Display

3-2 ◄ Left arrow navigation

3-3 Power ON-OFF

3-4 Phase / Wire setup

3-5 REC datalogger memory

3-6 Exit button

3-7 Setup/Enter button

3-8 Measurement input terminals

3-9 ▼Down arrow navigation

3-10 HOLD (freeze display)

3-11 Shift button

3-12 Display Backlight ON-OFF

3-13 ► Right arrow navigation

3-14 ▲ Up arrow navigation

Meter Top

3-15 Clamp positive input jacks

3-16 Clamp negative input jacks

3-17 Clamp power lead connections

Meter Right Side

3-18 9V power adaptor jack

3-19 SD memory card socket

3-20 RS232 PC interface socket
3-21 Reset button
3-22 Screw fastener for protective cap

Note: The Battery compartment and Tilt Stand are located on the rear of the instrument

3-1

3-2

3-3

3-4

3-5

3-6

3-7

3-8

3-14

3-12

3-11

3-10

3-9

3-13

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4.0 Meter Basics and Setup Mode

4-1 Initialization Screen

1. When the meter is switched ON the initialization screen appears.

Start-up Initialization Screen

2. The meter will also check for an inserted SD memory card. ‘SD check’ will appear on the lower
right side of the display. If an SD card is inserted, the blinking display will switch off after several
seconds. When no card is inserted the display will show ‘No disk’.

4-2 Measurement Screens

After the initialization screen, the meter displays one of the measurement screen configurations.
The meter reverts to the screen that was displayed at the last power down and may not be the
screen shown below. Other screen configurations are shown later in this User Guide.

Measurement Screen Example

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