Extech Instruments 382200 User manual

User's Manual
DC Regulated Power Supplies
Models 382200 (1Amp) and 382202
(3Amp)

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Introduction
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.
Specifications
Model 382200 382202
Display Dual LCD
Display Accuracy (V) ±(1.5%rdg +5D)
Display Accuracy (A) ±(2.0%rdg + 5D)
Voltage Output, DC 30.0 Volts 18.0 Volts
Current Output, DC 0 – 1.00 Amp 0 – 3.00 Amps
Ripple and Noise <0.5mV/<3mA
Line Regulation < 0.01% + 3mV/< 0.2% + 3mA
Load Regulation < 0.01% + 2mV/< 0.2% + 3mA
Power 110/220VAC (50/60Hz)
Dimensions 9.4 x 4.25 x 6" (240 x 108 x 154mm) (WxHxD)
Weight 4.4lbs. (2 kg) 6.6lbs. (3kg)
Meter Description
1. Voltage display
2. Current display
3. Negative (-) output terminal
4. Positive (+) output terminal
5. Illuminated On/Off switch
6. Current adjustment
7. Voltage adjustment

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Operation
CAUTION: Verify that the AC voltage setting matches your power source
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 operation.
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.
Warranty
EXTECH INSTRUMENTS CORPORATION warrants the basic instrument to be free of
defects in parts and workmanship for one year from date of shipment (a six month limited
warranty applies on 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 at [phone] EXTENSION 210 for authorization or visit www.extech.com
for more 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.

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Support line [phone]
Technical support: Extension 200; E-mail: [e-mail]
Repair & Returns: Extension 210; E-mail: [email protected]
Product specifications subject to change without notice
For the latest version of this User’s Guide, Software updates, and other
up-to-the-minute product information, visit our website: www.extech.com
Extech Instruments Corporation, 285 Bear Hill Rd., Waltham, MA 02451
Copyright ©2006 Extech Instruments Corporation
All rights reserved including the right of reproduction in whole or in part in any form.