Extech Instruments PQ3450 User Manual
User Guide
3-Phase Power Analyzer
MODEL PQ3450
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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
5-11 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. 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 parameters:
o Voltage (phase-to-phase) and Voltage (phase-to-ground)
o Current (Amps) phase-to-ground
o KW / KVA / KVAR / PF (phase)
o KW / KVA / KVAR / PF (system)
o KWH / KVAH / KVARH / PFH (system)
o Phase angle
High accuracy current clamps
600.0VAC input with CAT III-600V safety rating
Adjustable Current Transformer (CT) and Potential Transformer (PT) ratio for high power
distribution systems
Log up to 30,000 reading on removable SD memory card in Excel® format
Wide sampling rate range (from 2 seconds up to 2 hours)
Easy-to-use onscreen menu
Easy-to-hold rugged over-molded housing
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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
LCD Size: 81.4 X 61 mm (3.2 X 2.4”)
Dot Matrix backlit LCD (320 X 240 pixels)
Measurements V (voltage phase to phase)
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
Wire configurations 1P/2W, 1P/3W, 3P/3W, 3P/4W
Voltage ranges 10 ACV to 600 ACV (Auto Range)
Current ranges Current probe input signal voltage (ACV):
200mV /300mV /500mV /1V /2V /3V
Current probe input current range (ACA):
20A/200A/2000A(1200A)/30A/300A/3000A/6000A
Note that the meter has universal probe compatibility
Safety standard IEC1010 CAT III 600 V
ACV input impedance 10M ohms
ACV Auto Range Range select
ACA Manual Range
Clamp frequency response 40 Hz to 1 KHz
Over-load protection ACV 720 ACV RMS
Over-range
"OL" is displayed; Data on SD card will read ‘9999’ or ‘999’ for overrange data
Under-range "UR" is displayed
Data Hold Freezes displayed reading
Data Recording SD memory card
Sampling Time Approx. 1 second
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Real time data logger saves data to SD memory card for download to
PC (data files open directly to spreadsheet)
Datalogger
Sampling rate: From 2 seconds to 7200 seconds
Data Output
RS232 port
Operating Temperature 0 to 50oC (32 to 122oF)
Operating Relative Humidity 80% Relative Humidity max.
Power Supply Eight (8) ‘AA’ 1.5VDC batteries or AC 9V power adapter
Power Consumption Meter: 270 mA DC; Clamp: 22 mA DC
Weight 968g (2.1 lbs.) (with batteries)
Dimensions
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
Range Resolution Accuracy*
AC Voltage 10.0V to 600.0V 0.1V ± (0.5% range + 3 digits)
AC Current 0.2A to 6000A 0.001A to 1 A ± (0.5% range + 5 digits)*
Power Factor 0.00 to 1.00 0.01 ± 0.04
Φ Phase Angle -180° to 180° 0.1° ± 1°
Frequency 45 to 65Hz 0.1Hz 0.1Hz
0.0 to 3.6MW
0.0 to 3.6MVA
Power
0.0 to 3.6MVAR
0.001k to 0.001M ± (1% range+8 digits)
0.0 to 3.6MWH
0.0 to 3.6MVAH
Watt Hour
0.0 to 3.6MVARH
0.001k to 0.001M ± (1% range+8 digits)
*Meter accuracy only. For system accuracy add the accuracy of the clamp used.
PFH (Power Factor Hours): Long Term Power Factor
For three phase/four wire and three phase/three wire configurations:
PF
∑
= (PF1 + PF2 + PF3) / 3
For single phase three wire configurations:
PF
∑
= (PF1 + PF2) / 2
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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
3-3
3-2
3-4
3-5
3-6
3-7
3-13
3-14
3-12
3-11
3-10
3-9
3-8
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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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