Extech Instruments 380803 Manuale utente

380801-380803 V7.2 07/13

User's Guide

Power Analyzer Model 380801

Power Analyzer Datalogger Model 380803

99 Washington Street

Melrose, MA 02176

Phone 781-665-1400

Toll Free 1-800-517-8431

Visit us at www.TestEquipmentDepot.com

380801-380803-EN v7.2 07/13

Introduction

Congratulations on your purchase of the Extech 380801 or 380803 Power Analyzer Datalogger.

This device offers the following features:

Convenient front panel plug-in and testing

Four displays for Watts, PF/VA, V/KHz, Amperes

True power, true RMS for AC Voltage (V) and Current (A)

Datalogger stores over 1000 readings (Model 380803)

Auto Range for Watts and Volts

RS-232 PC Interface

Windows™ Application Software

Careful use of this meter will provide years of reliable service.

Specifications

WATT (Auto Range, AC+DC, Crest Factor < 5)

Range Resolution Accuracy Input

200W 0.1W

2000W 1W

±(0.9% reading + 5digts) (50/60Hz)

±(5% reading + 9digts) (40 to 400Hz)

0-300V, 0-20A,

PF=0.5 to 1

VOLTAGE (True RMS, Auto Range, AC+DC, Crest Factor < 5)

Range Resolution Accuracy Overload Protection

200V 0.1V

750V 1V

±(0.5% reading + 5digts) (40 to

400Hz) 1000VDC/750VAC

CURRENT (True RMS, AC+DC, Crest Factor < 5)

Range Resolution Accuracy (40 to 400Hz) Overload Protection

2 0.001A

20 0.01A ±(0.5% reading + 5digts) 20A, fused

PF (Direct Calculation from W, V, A): PF = Watt / (V * A)

FREQUENCY (Sensitivity 5V)

Range Resolution Accuracy

40Hz to 20kHz 1Hz-10Hz ±(0.5% of rdg ±2digts

Memory Size (380803) 1012 x 4 readings (non-volatile)

Memory Life (380803) 100,000 memory writes

Display 2000 count LCD displays

Over Range Indication ‘OL’ displayed on LCD

Sampling Rate 2.5 times per second

Power Source Eight 1.5V ‘AA’ batteries or AC adaptor

Power Consumption 22 mA approx.

Operating conditions 32 to 122oF (0 to 40oC); Less than 80%

Dimension 13.9"(L) x 11.8"(W) x 3.9" (H)

352(L) x 300(W) x 100(H)mm

Weight 3.6 lbs (1.637 Kg) approx.

380801-380803-EN v7.2 07/13

Meter Description

1. Watts display

2. PF or VA display

3. V or KHz display

4. A display

5. 20A fuse

6. Input Receptacle

7. Input Terminal

8. Output Terminal

9. Output Receptacle

10. RS-232 Terminal

11. DC 12V Adaptor Input

12. Hold

13. MAX button

14. PF/VA Select Button

15. REC button (380803)

16. KHz (frequency)

17. On/Off Button

18. Battery Compartment Cover

19. Carrying Handle

20. Storage Space for Accessories

380801-380803 V7.2 07/13

Basic Operation

Warning: If a power source of 220V is connected to the input voltage terminal/receptacle,

do not connect a110V device to the output load terminal/receptacle.

Using Receptacles

1. Plug one end of the power cord into the input receptacle and plug the other end into the wall

outlet.

2. Plug the device to be tested into the output load receptacle. The display will show the W, PF, V,

and A for the device under test.

Note 2: W= VA, 1KW = 1KVA = 1000W = 1000VA, when PF = 1.

Warning: The input receptacle and terminal are connected in parallel (as are the outputs).

To avoid electrical shock, do not touch any metal part of the receptacle or terminal.

Using Terminals

1. Plug one end of the power

leads into the input voltage

terminal (left) and connect

the other end of the test

leads to the power source.

2. Plug the device power

leads into the output load

terminals. W, PF, V, and A

will display for the device

under test.

Note 2: W=VA, 1KW = 1KVA = 1000W = 1000VA, when PF =1 at DC

Warning: The input and output receptacle and terminal are connected in parallel Do not

touch any metal part of the receptacle or terminal to avoid electrical shock.

380801-380803-EN v7.2 07/13

12W

Power Line

Motor

Using a Current Transformer

Warning: Only personnel well trained in the principles of Current Transformers (CT)

should attempt this test connection. When connecting a CT, follow the wiring diagrams

and instructions below.

1. Connect the CT’s kterminal (entering the CT) to the power line that passes through the CT, and

connect this kterminal to the input voltage black terminal (ground).

2. Connect the other power line to the input voltage red terminal.

3. Connect the CT’s lterminal (leaving the CT) to the output load black terminal (ground).

4. The Watt reading and Amp reading should be multiplied by the CT ratio. The V and PF readings

do not need to be multiplied by the CT ratio.

Warning: The input receptacles and terminals are connected in parallel (as are the

outputs). Do not touch any metal part of the receptacle or terminal.

380801-380803-EN v7.2 07/13

PC Interface for Data Acquisition & Datalogging Features

Data Acquisition

Models 380801 and 380803 can be connected to a PC where readings can be logged in real-time as

they are taken. Transferred reading data can be viewed, plotted, statistically analyzed, printed, saved,

and imported in spreadsheet, database, word processing, and other software programs. Instructions

for Data Acquisition are included in the separate Data Acquisition and Datalogging Manual on the

software disc.

Datalogging (Model 380803 only)

The Model 380803 has built-in memory where over one thousand readings can be stored for later

transfer to PC. Once transferred, data can be viewed, plotted, statistically analyzed, printed, saved as

a text file, and imported in spreadsheet, database, word processing, and other software programs

Instructions for Datalogging are included in the separate Data Acquisition and Datalogging Manual.

Note: A “Leading and Trailing bytes” error message can be caused by a RS232 COM port voltage

incompatibility. Use a Serial to USB adaptor to resolve the problem.

380801-380803-EN v7.2 07/13

Replacement of Batteries and 20A Fuse

Battery Replacement

When the low battery symbol is displayed on any of

the LCDs, replace the eight (8) 1.5V ‘AA’ batteries.

1. Turn off the power analyzer.

2. Open the battery compartment by using a screw

driver (see diagram).

3. Replace the batteries.

4. Replace the battery compartment.

20A Fuse Replacement

To replace the 20A fuse, remove the fuse cover as

indicated in item (5) in the Meter Description section

earlier in this manual and replace the fuse if

necessary.

Warning: Do not replace the blown fuse with a fuse rating greater than 20A.

Measurement of 3-Phase 3-Wire Power

Using One Power Analyzer

Measure WRS first (RST phases must be

correctly identified)

1. Connect the R-phase of the power

source to the black terminal of the

input voltage

2. Connect the S-phase of the power

source to the red terminal of the

input voltage

3. Plug the R-phase of the device to be

tested to the black terminal of the

output load. Do not short the R-

phase of the device to be tested to

the R-phase of the input power

source.

4. Record the reading of WRS displayed

on the ‘W’ LCD.

Measure WTS secondly (RST phases must

be correctly identified)

1. Connect the T-phase of the power

source to the black terminal of the

input voltage

2. Connect S-phase of the power

source to the red terminal of the input voltage

3. Plug the T-phase of the device to be tested to the black terminal of the output load. Do

not short the T-phase of the device to be tested to the T-phase of the input power

source.

4. Record the reading of WTS displayed on the ‘W’ LCD.

380801-380803-EN v7.2 07/13

Using Two Power Analyzers

Measure WRS and WTS (RST phases must be correctly identified)

1. Connect the R-phase of the power source to the black terminal of the input voltage of

power analyzer 1.

2. Connect the S-phase of the power source to the red terminal of the input voltage of

power analyzer 1.

3. Plug the R-phase of the device to be tested to the black terminal of the output load of

power analyzer 1. Do not short the R-phase of the load to the R-phase of the input

power source.

4. Record the reading of WRS displayed on the ‘W’ LCD of power analyzer 1.

5. Connect the T-phase of the power source to the black terminal of the input voltage of

power analyzer 2.

6. Connect the S-phase of the power source to the red terminal of the input voltage of

power analyzer 2.

7. Plug the T-phase of the device to be tested to the black terminal of the output load. Do

not short the T-phase of the device to be tested to the T-phase of the input power

source.

8. Record the reading of WTS displayed on the Watt LCD of power analyzer 2.

380801-380803-EN v7.2 07/13

Using Current Transformers (CT) with 2 Power Analyzers

Measure WRS and WTS (RST phases must be correctly identified)

1. Connect the R-Phase to the black terminal of the input voltage of power analyzer 1.

2. Connect the S-phase to the red terminal of the input voltage of power analyzer 1.

3. Connect the

kterminal of CT1 to the R-phase.

4. Connect the

lterminal of CT1 to the black terminal of the output load of power

analyzer 1.

5. The Watt reading of the power analyzer 1 is WRS

6. Connect the T-phase to the black terminal of the input voltage of power analyzer 2.

7. Connect the S-phase to the red terminal of the input voltage of power analyzer 2.

8. Connect the

kterminal of CT2 to the R-phase.

9. Connect the

lterminal of CT2 with the black terminal of the output load of power

analyzer 1.

10. The Watt reading of the power analyzer 2 is WTS

380801-380803-EN v7.2 07/13

Glossary of Terms

W True Watt

PF Power Factor

V True RMS Voltage

A True RMS Ampere

Phase angle Time difference between V and A calculated by

cos-1 (Power Factor)

VA Apparent Power (V * A)

VAR Reactive Power (SQRT [VA2– W2])

IR Equivalent current (through equivalent resistance)

Req Equivalent resistance

IL Equivalent current (through equivalent inductance)

XL Equivalent impedance of equivalent inductance

Leq Equivalent inductance

CAP Required capacitance

CR Carriage Return

LF Line Feed

EPS Datalogger Memory Self-test

EPE Erasing Datalogger Memory

W3True Power (33W)

WRS Power of R phase with respect to S phase

WTS Power of T phase with respect to S phase

VA3Apparent Power (33W and Balanced Load)

VAR3Reactive Power (33W and Balanced Load)

PF3Power Factor (33W and Balanced Load)

Mean Mean Value

Std Dev Standard Deviation

Best Fit A line drawn to fit a curve with minimum error

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