Extech Instruments 380801 User manual

User Manual
Power Analyzer Model 380801
Power Analyzer Datalogger Model 380803
www.GlobalTestSupply.com
Find Quality Products Online at: [e-mail]

2 380801_803-en-GB_V7.4 10/18
Introduction
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 (9-pin PC COM port)
Windows XP compatible Application Software
Careful use of this meter will provide years of reliable service.
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
www.GlobalTestSupply.com
Find Quality Products Online at: [e-mail]

3 380801_803-en-GB_V7.4 10/18
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.
www.GlobalTestSupply.com
Find Quality Products Online at: [e-mail]

4 380801_803-en-GB_V7.4 10/18
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.
www.GlobalTestSupply.com
Find Quality Products Online at: [e-mail]

5 380801_803-en-GB_V7.4 10/18
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.
www.GlobalTestSupply.com
Find Quality Products Online at: [e-mail]

6 380801_803-en-GB_V7.4 10/18
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.
You can download a copy of the program from www.Extech.com.
Note: Due to the older version of software, this meter can only operate on Windows XP and
must use a 9-pin COM port on a Desk top PC as it requires the full +/- 10 volt RS232 signal
in order to operate. A USB adapter cannot be used with this meter.
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.
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.
Never dispose of used batteries or rechargeable batteries in
household waste.
As consumers, users are legally required to take used
batteries to appropriate collection sites, the retail store
where the batteries were purchased, or wherever batteries
are sold.
Disposal: Do not dispose of this instrument in household waste. The user is obligated to take end-
of-life devices to a designated collection point for the disposal of electrical and electronic
equipment
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.
www.GlobalTestSupply.com
Find Quality Products Online at: [e-mail]

7 380801_803-en-GB_V7.4 10/18
Glossary of Terms
W True Watt
PF Power Factor
V True RMS Voltage
A True RMS Ampere
Phase Angle: 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
www.GlobalTestSupply.com
Find Quality Products Online at: [e-mail]

8 380801_803-en-GB_V7.4 10/18
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.
www.GlobalTestSupply.com
Find Quality Products Online at: [e-mail]

9 380801_803-en-GB_V7.4 10/18
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.
www.GlobalTestSupply.com
Find Quality Products Online at: [e-mail]

10 380801_803-en-GB_V7.4 10/18
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
www.GlobalTestSupply.com
Find Quality Products Online at: [e-mail]