Extech Extech PQ3470 Manual
User Guide
3-Phase Power and Harmonics Analyzer /
Datalogger
MODEL PQ3470
99 Washington Street
Melrose, MA 02176
Phone 781-665-1400
Toll Free 1-800-517-8431
Visit us at www.TestEquipmentDepot.com
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............................................................. .8
4.0 METER BASICS AND THE SETUP MODE
4-1
Initialization Screen....................................................................................................... 10
4-2
Measurement Screen Example.......................................................................... 10
4-3
Keypad Summary................................................................................................. 11
4-4
Setup Mode Basics...................................................................................................... 12
4-5
Setup Mode In Detail......................................................................................... 14
5.0 POWER MEASUREMENT PROCEDURES
5-1
1Φ 2W (single phase two wire) measurement .......................................... .21
5-2
1Φ 3W (single phase three wire) measurement.........................................22
5-3
3Φ 3W (three phase three wire) measurement......................................... .23
5-4
3Φ 4W (three phase four wire) measurement............................................24
5-5
CT and PT measurement...........................................................................................25
5-6
Zero Adjust for Watt Hour Measurement.................................................................26
5-7
Harmonics function Measurement ........................................................................... .26
5-8
Graphic Phasor Measurement.................................................................................. .28
5-9
Voltage / Current Waveform...................................................................................... .29
5-10
Transient Capture (Dips, Swells, Outage)............................................................ .30
5-11
Data Logger......................................................................................................................31
5-12
Data Hold ......................................................................................................32
5-13
Display Backlight key....................................................................................32
5-14
LOWBAT (Low Battery) screen...................................................................32
5-15
Measurement Definitions.................................................................................. .33
5-16
Reset Button....................................................................................................... .33
6.0 MAINTENANCE
6-1
Cleaning................................................................................................................. 34
6-2
Battery Replacement............................................................................................ 34
7.0 SD Card
7-1
Download Data from SD Ca rd ..........................................................35
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1.0 Introduction
Congratulations on your purchase of the Model PQ3470 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 up to 35 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
o Harmonics
High accuracy current clamps
600.0VAC input with CAT III-600V safety rating
Adjustable Current Transformer (CT) and Potential Transformer (PT) ratio for high p ower
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)
Captured measurements imported directly into Excel
TM
via SD memory card
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
Display
Measurements
Wi re configurations
Voltage ranges
Current ranges
Safety standard
ACV input impeda nce
Range select
Clamp frequency response
Te s t e d c l a m p frequency
Over-load pro tection
Over-range
Custom single-chip microprocessor LSI circuit
LCD Size: 81.4 X 61 mm (3.2 X 2.4”)
Dot Matrix backlit LCD (320 X 240 pixels)
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
Harmonics
1P/2W, 1P/3W, 3P/3W, 3P/4W
10 ACV to 600 ACV (Auto Range)
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)
Note that the meter has universal probe compatibility
IEC1010 CAT III 600 V
10M ohms
ACV
ACA
40 Hz to 1 KHz
45 to 65 Hz
ACV
"OL" is displayed; ACV: 720VACrms; ACA: 1300ACA with clamp
probe; Data on SD card will read ‘9999’ or ‘999’ for over-range
data
Auto Range
Manual Range
720 ACV RMS
Under-range
Data Hold
Data Recording
Sampling Time
"UR" is displayed
Freezes displayed reading
SD memory card
Approx. 1 second
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Datalogger
Data Output
Operating Temperature
Operating Relative Humidity 80% Relative Humidity max.
Power Supply
Power Consumption
Max. Conductor size
Weight Meter: 968g (2.1 lbs) (with batteries); Clamp: 467g (1.0lbs)
Dimensions
Accessories Included Instruction manual
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
Serial or USB connection (cable supplied)
0 to 50oC (0 to 122oF)
Eigh t (8) ‘AA’ 1.5VDC b atteries or AC 9V power adapter
Meter : 2 70 mA DC ; Clamp: 22 mA DC
Clamp can accommodate up to 50 mm (2.0 ”) diamet er
Meter: 225 X 125 X 64 mm (8.86 X 4.92 X 2.52“)
Optional Clamp: 210 X 64 X 33mm (8.3 X 2.5 X 1.3”)
Optional Clamp Jaw: 86 mm (3.4”)
Test Leads: 1 Set (4 pieces)
Alligator clips: 1 Set (4 pieces)
AC to DC 9V adapter
SD card (2G)
Carrying case
2.1 Electrical Specifications (45 to 65Hz; 23±5°C)
Function
AC Volt age 10.0V to 600.0V 0.1V ± (0.5% range + 3 digits)
AC Voltage
(peak to peak)
AC Current (trms) 0.2A to 6000A 0.001A to 1 A ± (0.5% range + 5 digits)
AC Current
(peak to peak)
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
Power
Watt-Hour
*Meter accuracy only. For system accuracy add the accuracy of the clamp used.
Range Resolution Accuracy*
28.2V to 1.697kV 0.1V ± (0.5% range + 30 digits)
2.828A to 16.97kA 0.001A to 1 A ± (0.5% range + 30 digits)
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
0.001k to 0.001M ± (1% range+8 digits)
0.001k to 0.001M ± (1% range+8 digits)
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Harmonics Magnitude
(>5%, 50/60Hz)
ACV
ACA
Harmonics Magnitude
(>5%, 50/60Hz)
ACV
ACA
Crest Factor
(ACV or ACA)
Total Harmonic
Distortion
Range Resolution Accuracy
1 to 20th ± (2% + 5 digits)
21 to 30th ± (4% + 5 digits)
31 to 50th
0.1V
Reference only
1 to 20th ± (2% + 5 digits)*
21 to 30th ± (4% + 5 digits)*
31 to 50th
0.001A to 1A
Reference only
Range Resolution Accuracy
1 to 20th ± (2% + 5 digits)
21 to 30th ± (4% + 5 digits)
31 to 50th
0.1%
Reference only
1 to 20th ± (2% + 5 digits)*
21 to 30th ± (4% + 5 digits)*
31 to 50th
0.1%
Reference only
1.000 to 9.999 0.001 ± (5% + 0.3)
0 to 20% ± (2% + 5 digits)
20.1 to 100%
0.1%
± (6% + 10 digits)
*Meter accuracy only. System accuracy includes 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:
∑
= (PF1 + PF2 + PF3) / 3
PF
For single phase three wire configurations:
∑
= (PF1 + PF2) / 2
PF
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3.0 Meter Description
Meter Front, Top, and Right Side
LCD Display
3-1
3-2
Keypad (broken out below)
3-3
Measurement input terminals
3-4
SD CARD slot, RS232 jack,
AC adaptor jack, Reset button (broken out below)
3-5
Clamp Power Output jacks (broken out below)
3-1
3-2
3-5
3-4
3-3
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Keypad Description
Display Backlight ON-OFF
3-6
3-7
Power ON-OFF
3-8
Exit (programming)
3-9
REC datalogger memory
3-10
Volt/Amp range
3-11
Shift (programming)
3-12
Setup / Enter
3-13
HOLD (freeze display)
3-14
Transient display
3-15
V/A Waveform display
3-16
Phasor display
3-17
Power Measurement
3-18
▲ up arrow navigation
3-19 ▼down arrow
3-20
◄ lef t a r r o w navig ation
3-21
► rig h t a r r o w nav igation
3-22
Phase / Wire setup
3-23
Harmonics display
3-24
Harmonics Analysis display
navigation
Meter Right Side
9V power adaptor jack
3-25
3-26
SD memory card socket
3-27
RS232 PC interface socket
3-28
Reset button
3-29
Screw fastener for protective cap
Meter Top
Clamp positive input jacks
3-30
3-31
Clamp negative input jacks
3-32
Clamp power lead connections
Note: The Battery compartment and Tilt Stand are loca ted on the r ear of th e instru ment
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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 (see Fig. 4-1 below).
Figure 4-1: 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 then 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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4.3 Keypad Summary
POWER : Press and hold to power ON/OFF
1Φ 3Φ (phase/wire) : Select (1P/2W, 1P/3W, 3P/3W, 3P/4W) measurement functions
REC : Data record key for the SD Memory Card
HOLD: Freeze the displayed reading
BACKLIGHT
SETUP/ENTER : Enter the Setup mode. Also used as an Enter key to confirm entries
EXIT : Exit a screen when programming
SHIFT: Programming key for use in the Setup Mode
Up arrow ▲ : Generally, press to move the cursor up or to change a parameter value, however
use varies with each particular function
Down arrow ▼ : Generally, press to move the cursor down or to change a parameter value,
however use varies with each particular function
Left arrow ◄: Use varies according to a particular function
Right arrow ►: Use varies according to a particular function
Volt/Amp Range
Transient
V/A Waveform
Phase
Power Reading
Harmonics
Harmonics Analysis
display : Capture transient measurements
diagram : View measurements in vector display fo rmat
: Switch LCD backlight ON/OFF
: Select a range for voltage or current harmonic meas urements
display : View waveform representations of voltage a nd current
: Display power measurements
display : Display Harmonics
: View the Harmonics analysis
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