EXTECH 382222

User's Manual
DC Regulated Power Supplies
Models 382222 (12 Amp) and 382225 (25A)
382222 and 382225 v1.5 11/03
EXTECH INSTRUMENTS CORPORATION 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 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 (781) 890-7440 for authorization. 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.
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.
Careful use of this device will provide years of reliable service.
Voltage Output, DC
Current Output, DC
Max. Current (5 minutes)
Overload Indicator
Ripple and Noise
Line Regulation
Load Regulation
Cooling Method
Dual Analog Metering
3 - 15V
0 - 12 Amps
0 - 25 Amps
Status LED
6A (110V), 3A (220V)
10A (110V), 5A (220V)
< 0.05% + 10mV
< 0.5% + 5mV
< 0.6% + 10mV
Internal Fan (Heat Activated)
110/220VAC 50/60Hz (switchable)
8.1 x 4.5 x 11" (205 x 115 x 280mm) (WxHxD)
18.7lbs. (8.5 kgs)
18.7lbs. (8.5kgs)
Meter Description
Voltage / Current meters
Power status LED
Power ON/OFF switch
Low current output terminals
Binding post output terminals
Voltage output adjustment
Overload status LED
382222 and 382225 v1.5 11/03
CAUTION: The snap terminal output should be used for loads of 3 amps or
less. The binding post output connectors should be used when the current may
exceed 3 amps.
1. The Power Supply must be powered using the rated line voltage within + 5%.
2. Before turning the power supply ON, remove any load and set the Voltage
Adjustment Knob to the full counter-clockwise position ('0' volt output).
3. The output current is dependent on the output voltage. See the Output
Voltage/Output Current curve below.
4. The analog display indicates the actual current and voltage output.
5. Keep the cooling fan area clear of obstacles to prevent overheating. The fan will
operate when the internal temperature reaches 70 degrees and will automatically
shut off when the temperature drops to 40 degrees.
6. When the Overload LED Indicator lights, remove power to the power supply and
troubleshoot the cause of the overload condition before powering up.
Calibration and Repair Services
Extech offers complete repair and calibration services for all of the products we sell.
For periodic calibration, NIST certification or repair of any Extech product, call customer
service for details on services available. Extech recommends that calibration be
performed on an annual basis to insure calibration integrity.
Copyright © 2000 Extech Instruments Corporation. All rights reserved including the
right of reproduction in whole or in part in any form.
382222 and 382225 v1.5 11/03