Extech Instruments PQ3450-2-NIST User manual

User Guide

3-Phase Power Analyzer/Datalogger

MODEL PQ3450

99 Washington Street

Melrose, MA 02176

Phone 781-665-1400

Toll Free 1-800-517-8431

Visit us at www.TestEquipmentDepot.com

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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 1Φ2W (single phase two wire) measurement ......................................... .17

5-2 1Φ3W (single phase three wire) measurement....................................... .18

5-3 3Φ3W (three phase three wire) measurement........................................ .19

5-4 3Φ4W (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 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

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(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

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

Over-load protection ACV 720 ACV RMS

Over-range "OL" is displayed; 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 size limits SD Cards up to 2G; SDHC Cards up to 16G

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

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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 (2 hours)

Max. File capacity: 30,000 records

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

Meter Power

Consumption 250 mA DC

Weight 975g (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* (of reading)

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

AC Current <20.0A 0.001 < 10 A

0.01 ≥10A ± (0.5% + 0.1A + 5 digits)*

20.01A to 200.0A 0.01 < 100 A

0.1 ≥100A ± (0.5% + 0.5A + 5 digits)*

>200.0A 0.1 < 1000A

1 ≥1000A ± (0.5% + 5A + 5 digits)*

Power Factor 0.00 to 1.00 0.01 ± 0.04

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

Frequency 45 to 65Hz 0.1Hz 0.1Hz

Power 0.0 to 3.6MW

0.001k to 0.001M ± (1% + 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% + 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.

*PF∑:

For 3Φ4W, 3Φ3W, 1Φ3W

PF∑= P∑/ S∑

For 1Φ2W

PF1 = P1 / S1

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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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4.3 Keypad Summary

POWER : Press and hold to power ON/OFF

1Φ3Φ(phase/wire) : Select (1P/2W, 1P/3W, 3P/3W, 3P/4W) measurement function

REC : Data record key for use with the SD Memory Card

HOLD : Freeze the displayed reading

BACKLIGHT : Switch LCD backlight ON/OFF

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

4.4 Setup Mode

4.4.1 Setup Mode Basics

1. Press the SETUP button to access the Setup Mode. The screen shown below will appear on

the meter’s LCD.

2. Use the up and down arrow keys to scroll through the parameters.

3. Press the SHIFT key to open a particular parameter for editing (the

‘SHIFT 1’ display icon will be visible on the upper right hand corner of

the LCD).

4. Once a parameter is opened for editing (parameter variable

highlighted), use the up and down arrow keys to edit the setting.

5. When the SHIFT key is pressed on the FILE NAME parameter, the user can select the first

half of the file name which is the configuration (3P4, for example). When the SHIFT keys is

pressed again, the SHIFT 2 icon appears on the display and the user can select the second

half of the file name (10001.XLS, for example). This applies only to the FILENAME

parameter.

6. Press the SHIFT key to continue scrolling through the other parameters using the up and

down arrow keys.

7. To exit the Setup Mode press the EXIT key.

8. Detailed instructions for each parameter are provided in the next section.

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Setup Mode Screen

4.4.2 The Setup Mode Parameter Menu

Folder Name: Select a file name on the SD CARD; the range is WTA01 to WTA10

File Name: Set a file name on the SD CARD (50 filenames are permitted)

REC Date: Show a file’s date-time stamp (Year / Month / Date / Hour / Min / Sec)

Sampling Time: Set the datalogger sampling rate from 2 to 7200 seconds

Delete File: Delete an existing data file from the SD CARD

SD Format: Format the SD CARD

PT: Set Potential Transformer ratio (1 to 1000); CT: Set Current Transformer ratio (1 to 600)

Audible Tone: Set the beeper ON or OFF

Clamp Type: Select the clamp type from the menu list

A (Amps): Set the Current range; V (Volts): Set the Voltage range

RS232 Out Select: RS232 output function (up to nine items can be output)

Year,Month,Date,Hour,Minute,Second: Set the current date and time

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