Extech Instruments 380803 User manual

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User's Guide
Power Analyzer Model 380801
Power Analyzer Datalogger Model 380803
99 Washington Street
Melrose, MA 02176
Phone [phone]
Toll Free 1-800-517-8431
Visit us at www.TestEquipmentDepot.com

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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.

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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

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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.

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12W
Power Line
Motor
K
K
L
I
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.

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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.

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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.

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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.

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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

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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