Extech Instruments PQ3470 Manual de usuario

User Guide

3-Phase Power and Harmonics Analyzer / Datalogger

MODEL PQ3470

PQ3470-en-GB_V1.9 10/15

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

1Φ2W (single phase two wire) measurement .......................................... .21

5-2

1Φ3W (single phase three wire) measurement........................................ .22

5-3

3Φ3W (three phase three wire) measurement ......................................... .23

5-4

3Φ4W (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 Card ......................................................... 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:

oVoltage (phase-to-phase) and Voltage (phase-to-ground)

oCurrent (Amps) phase-to-ground

oKW / KVA / KVAR / PF (phase)

oKW / KVA / KVAR / PF (system)

oKWH / KVAH / KVARH / PFH (system)

oPhase angle

oHarmonics

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)

Captured measurements imported directly into ExcelTM via SD memory card

Easy-to-use onscreen menu

Easy-to-hold rugged over-molded housing

PQ3470-en-GB_V1.9 10/15

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

Harmonics

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/60A/600A/6000A

Note that the meter has universal probe compatibility

Safety standard

IEC1010 CAT III 600 V

ACV input impedance

10M ohms

Range select

ACV

Auto Range

ACA

Manual Range

Clamp frequency response

40 Hz to 1 KHz

Tested clamp frequency

45 to 65 Hz

Over-load protection

ACV

720 ACV RMS

Over-range

"OL" is displayed; ACV

Data on SD card will read ‘9999’ or ‘999’ for over-range data

Under-range

"UR" is displayed

Data Hold

Freezes displayed reading

Data Recording

SD memory card

SD Card capacity 2G SD max. / 16G SDHC max.

Sampling Time

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

PQ3470-en-GB_V1.9 10/15

Datalogger

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

Max. file capacity: 30,000 records

Data Output

Serial or USB connection (cable supplied)

Operating Temperature

0 to 50

C (32 to 122

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

Max. Conductor size

Clamp can accommodate up to 50 mm (2.0”) diameter

Weight Meter: 1010g (2.2 lbs.) (with batteries); Clamp: 500g (1.1lbs)

Dimensions 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”) Outer diameter

Accessories Included Instruction manual

Batteries

SD card (4G)

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 Voltage

(peak to peak) 28.2V to 1.697kV 0.1V to 1V ± (0.5% range + 30 digits)

AC Current (trms) 0.2A to 6000A 0.001A to 1 A ± (0.5% range + 5 digits)*

AC Current

(peak to peak) 2.828A to 16.97kA 0.001A to 10 A ± (0.5% range + 30 digits)*

Power Factor 0.00 to 1.00 0.01 ± 0.04

ΦPhase Angle -180° to 180° 0.1° ± 1°*

Frequency 45 to 65Hz 0.1Hz 0.1Hz

Power 0.0 to 3.6MW

0.001k to 0.001M ± (1% range+8 digits)*

0.0 to 3.6MVA

0.0 to 3.6MVAR

Watt-Hour 0.0 to 3.6MWH

0.001k to 0.001M ± (1% range+8 digits)*

0.0 to 3.6MVAH

0.0 to 3.6MVARH

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

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Harmonics Magnitude

(>5%, 50/60Hz) Range Resolution Accuracy

ACV 1 to 20th

0.1V

± (2% + 5 digits)

21 to 30th ± (4% + 5 digits)

31 to 50th Reference only

ACA 1 to 20th

0.001A to 1A

± (2% + 5 digits)*

21 to 30th ± (4% + 5 digits)*

31 to 50th Reference only

Harmonics Magnitude

(>5%, 50/60Hz) Range Resolution Accuracy

ACV 1 to 20th

0.1%

± (2% + 10 digits)

21 to 30th ± (4% + 20 digits)

31 to 50th Reference only

ACA 1 to 20th

0.1%

± (2% + 10 digits)*

21 to 30th ± (4% + 20 digits)*

31 to 50th Reference only

Crest Factor

(CFV or CFA) 1.000 to 9.999 0.001 ± (5% + 0.3)

Total Harmonic

Distortion (THD) 0 to 20% 0.1% ± (2% + 5 digits)

20.1 to 100% ± (6% + 10 digits)

Phase angle 1 to 50th 0.1° ± 2°

*Meter accuracy only. System accuracy includes the accuracy of the clamp used.

PFH: Long Term Power Factor

PF∑:

For 3ɸ4W, 3 ɸ3W, 1 ɸ3W: PF∑= p∑/ S∑

For 1ɸ2W: PF1 = P1/S1

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3.0 Meter Description

Meter Front, Top, and Right Side

3-1

LCD Display

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)

PQ3470-en-GB_V1.9 10/15

Keypad Description

3-6

Display Backlight ON-OFF

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

navigation

3-20

◄

left arrow navigation

3-21

►

right arrow navigation

3-22

Phase / Wire setup

3-23

Harmonics display

3-24

Harmonics Analysis display

3-25 3-26

3-28

3-27

3-29

Meter Right Side

3-25

9V power adaptor jack

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

3-30

Clamp positive input jacks

3-31

Clamp negative input jacks

3-32

Clamp power lead connections

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

3-6

3-7

3-8

3-9

3-10

3-11

3-12

3-13

3-18

3-19

3-20

3-21

3-16 3-15 3-143-17

3-22

3-23 3-24

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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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