Extech Instruments 382260 User Manual

User's Guide

Model 382260
80W 3-in-1 Switching DC Power Supply

Introduction

Congratulations on your purchase of the Extech 80W 3-in-1 Switching DC Power Supply.
The Model 382260 has three output ranges that perform like 3 power supplies in one. It
can be used for many applications including bench testing, field service, hobby and
telecommunication equipment use. This power supply is shipped fully tested and calibrated
and, with proper use, will provide years of reliable service.

Safety

This manual contains important safety and operation instructions for correct use of the
power supply. Read through the manual and pay special attention to the markings and
labels of this unit and equipment to be connected.

Pay special attention to these two types of notices used in this manual

WARNING : Failure to observe this warning may cause injury to persons and

CAUTION : Failure to observe this warning may result in damage to equipment and

WARNING :

damage to power supply or connected equipment.

Improper functioning of the power supply.

1. Do not use this power supply near water.

2. Do not operate or touch this power supply with wet hands.

3. Do not open the casing of the power supply when it is connected to ac
mains.

4. Refer all servicing to qualified service personnel only.

5. Before replacing the AC fuse find out and clear up the cause first.

6. Replace the AC fuse with the same type and rating as the original fuse.

CAUTION :

1. Use a grounded 3 pin AC source .

2. This unit is for indoor use only .

3. Do not operate or place this unit in a humid, dusty, in direct sunlight
locat i o n or n ea r any heat source.

4. Before plugging into local AC mains, check with the rating label at the back
of the unit.

5. Do not block any ventilation openings of the unit.

6. This unit must be used within the specified rating, regular excessi ve
continuous loading may cause damage to the power supply.

7. The gauge size of input power cable must be at least 0.75mmsq and the
total length of power cable must not exceed 3m.

8. Input Fuse Recommended: T3AL250V (3A Time-Lag)

382260 V1.0 6/07 2

Power Supply Description

1. Power On/Off switch

2. Output terminals

3. UVL adjustment screw

4. Current adjustment

5. Voltage adjustment

6. Upper Voltage Limit button

7. Preview button

8. Range selector

9. Output On/Off button

10. UVL indicator

11. Constant Voltage indicator

12. Constant Current indicator

13. Overvoltage or Temperature alarm

14. Slave indicator

15. LED Voltage Display

16. LED Current Display

17. Master/Slave switch

18. Master/Slave control terminals

19. Remote Sensing terminals

20. Rear Output terminals

21. AC power socket

382260 V1.0 6/07 3