DC Regulated Power Supplies

DC Regulated Power Supplies
Model 382200 (1Amp) and 382202 (3Amp)
Congratulations on your purchase of the Extech DC Regulated Power Supply. These units are solid
state, compact, regulated supplies suitable for many applications including bench testing, field service,
hobby and telecommunication equipment use. This meter is shipped fully tested and calibrated and,
with proper use, will provide years of reliable service. . Please visit the Extech Instruments website
(www.extech.com) to check for the latest version of this User Guide. Extech Instruments is an ISO9001 certified company.
Dual LCD
Display Accuracy (V)
±(1.5%rdg +5D)
Display Accuracy (A)
±(2.0%rdg + 5D)
Voltage Output, DC
30.0 Volts
Current Output, DC
0 – 1.00 Amp
Ripple and Noise
18.0 Volts
0 – 3.00 Amps
Line Regulation
< 0.01% + 3mV/< 0.2% + 3mA
Load Regulation
< 0.01% + 2mV/< 0.2% + 3mA
115/230VAC (50/60Hz)
9.4 x 4.25 x 6" (240 x 108 x 154mm) (WxHxD)
4.4lbs. (2 kg)
6.6lbs. (3kg)
Meter Description
Voltage display
Current display
Negative (-) output terminal
Positive (+) output terminal
Illuminated On/Off switch
Current adjustment
Voltage adjustment
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CAUTION: Verify that the AC voltage setting and fuse rating matches the power source
being used BEFORE applying power to the instruments. Do not connect to a voltage
source that is greater.
CAUTION: Limit full load operation (>25watts for the 382200 and >45watts for the 382202)
to 15 minutes continuous operation. Always allow a cool down period after full load
1. The Power Supply must be powered using the rated line voltage within +10%.
2. Before turning the power supply ON, remove any load and set the Voltage and Current
Adjustment Knobs to their full counter-clockwise positions.
3. Use the Current and Voltage Adjustment knobs for setting variable Current and Voltage
output signals respectively.
4. The LCD displays will indicate actual current and voltage outputs.
5. Keep the meter's cooling vents (top and sides) clear of obstacles to prevent overheating.
Current Limit
To avoid having the load draw too much current, a current limit can be set as follows:
With the voltage and current output adjustments set fully off, carefully short the positive and
negative output terminals together.
Turn the Output Voltage knob clockwise to the 25% position (approx).
Adjust the Output Current knob clockwise until the desired current level is displayed.
Turn the Output Voltage knob counter-clockwise (current display will go to 0.00).
Connect a load to the output terminals and adjust the voltage to the desired level.
Fuse Replacement
The fuse receptacle is located on the back of the unit next to the power cable input. Each unit
comes with one 120V 2A or 3A fuse installed in the unit. Three spare fuses are included, a second
120V 2A or 3A fuse, and two 230V 1A fuses. See below for the fuse specifications.
230V Operation
1. Replace the 2A or 3A, 120V fuse with a 1A (230V) fuse.
2. Toggle the switch located on the rear of the unit from 115V to 230V.
3. Use a power cord that matches the outlet for the country in question.
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EXTECH INSTRUMENTS (a FLIR company) warrants this instrument to be free of defects in parts and
workmanship for one year from date of shipment (a six month limited warranty applies to sensors and
cables). If it should become necessary to return the instrument for service during or beyond the
warranty period, contact the Customer Service Department for authorization. Visit our website
www.extech.com for contact information. A Return Authorization (RA) number must be issued before
any product is returned to Extech. The sender is responsible for shipping charges, freight, insurance
and proper packaging to prevent damage in transit. This warranty does not apply to defects resulting
from action of the user such as misuse, improper wiring, operation outside of specification, improper
maintenance or repair, or unauthorized modification. Extech specifically disclaims any implied
warranties or merchantability or fitness for a specific purpose and will not be liable for any direct,
indirect, incidental or consequential damages. Extech's total liability is limited to repair or replacement
of the product. The warranty set forth above is inclusive and no other warranty, whether written or oral,
is expressed or implied.
Calibration and Repair Services
Extech offers repair and calibration services for the products we sell. Extech also provides NIST
certification for most products. Call the Customer Service Department for information on calibration
services available for this product. Extech recommends that annual calibrations be performed to verify
meter performance and accuracy.
Support lines: U.S. 877-439-8324, Intl. +1 603-324-7800
Technical support: Option 3; E-mail: support@extech.com
Repair & Returns: Option 4; E-mail: repair@extech.com
Product specifications subject to change without notice
Visit our website: www.extech.com
Extech Instruments Corporation, 9 Townsend West, Nashua, NH 03063
ISO 9001 Certified since 1995
Copyright © 2006-2012 Extech Instruments (a FLIR company)
All rights reserved including the right of reproduction in whole or in part in any form.
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