Extech 382280 Operating Manual
User's Guide
Programmable DC Power Supply
200 Watt (40 Volts / 5 Amps)
Model 382280
382280
Introduction
Congratulations on your purchase of the Extech 382280 Programmable DC Power
Supply. This 200 watt power supply offers an adjustable 5ADC / 40VDC output plus fixed
outputs (5VDC and 3.3VDC). Programming features include custom over-voltage/current
protection with delay timer, 199-test storage, and automated testing. Careful use of this
power supply will provide years of reliable service.
Specifications
Programmed Voltage and Current (after 5-minute warm-up)
Range Resolution Accuracy
Voltage V (C.V.) 0 to 40V 1mV 0.05% ± 9mV
Current A (C.C.) 0 to 5A 1mA 0.2% ± 9mA
Voltage and Current Display (Read back)
Voltage V (C.C.) 0.1 to 40V 1mV 0.1% ± 12mV
Current A (C.V.) 0.05 to 5A 1mA 0.2% ± 12mA
Display Backlit Dot Matrix (2-line) Display
Programmable Voltage Output 0.000 to 40.000VDC
Programmable Current Output 0.000 to 5.000ADC
Resolution 1mV; 1mA
Fixed Outputs 5V (2A) and 3.3V (3A)
Memory 199 locations
Accuracy Adjustable Voltage: 0.05% ±9mV
Adjustable Currrent: 0.2% ±9mA
Fixed 5V: ±0.25V; Fixed 3.3V: ±0.16V
Response Time < 150 ms
Temperature Coefficient < 100ppm /
Load Regulation < 1mV / Amp
Line Regulation No effect if line voltage is within 90V and 130V for
Ripple and Noise (0 ~ 40V, 0 ~ 5A) < 3mV
(5V/2A, 3.3V/3A) 10mV
Open Circuit (OCP) detection Current > 0.05A
C.V. or C.C. detection Current > 0.05A
Short Circuit Protect
Power Source 110/220VAC 50/60Hz
Dimensions 12.2 x 9.9 x 5.3” (310 x 250 x 135mm)
Weight 8.4 lbs. (3.8kg)
Range Resolution Accuracy
o
C
115V power (200V to 240V for 220V power).
(C.V.) < 3mA
rms
~ 20mV
rms
rms
(C.C.)
rms
When the 5V or 3.3V output is less than 1V
(shorted), one of the preceding alert symbols will be
shown on the LCD
Safety Symbols
Earth Ground Terminal
Please read the statement thoroughly to prevent injury or loss of life, and
to prevent damage to this product.
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Version 1.6 7/04
Front Panel Description
1. OPER/STBY: Operation/Standby button. Press to enable/disable the output. When the
supply is in the STANDBY mode the output is 0 volts.
2. RECALL: Press to call up stored output sets or to activate Automatic Test Sequencing.
3. STORE: Press to save the present V/A output set to memory. Use the numeric keys (not
the arrows) to select a storage location from 000 to 199 and then press ENTER.
4. SEC (Seconds): Press to enter time in seconds. Use the ENTER key to confirm entries.
5. V/A: Press to toggle between voltage (V) and current (A) on the display.
6. OCP (Over-Current Protection): Press to enable/disable OCP.
7. OVP (Over Voltage Protection): Press to program the OVP value (defaults to 40V).
8. Numeric keypad and period button.
9. ENTER: Press to confirm entries.
10. ▼ (DOWN Arrow): Press to decrease a programming value.
11. ▲ (UP Arrow): Press to increase a programming value.
12. (RIGHT Arrow): Press to move the cursor to a new location in a row.
13. POWER ON/OFF: Press to turn the supply on or off.
14. Rubber feet.
15. Dot matrix display.
16. GND: Ground terminal (connected to the chassis of the unit).
17. COM: Common terminal for the 5V and the 3.3V output.
18. 3.3V/3A: Positive terminal for the 3.3V output. If more than 3A is drawn, the output will
be lower than the 3.3V specified.
19. 5V/2A: Positive terminal for the 5V output. If more than 2A is drawn, the output will be
lower than the 5V specified.
20. Positive Terminal for the 40VDC / 5ADC output. This terminal is physically connected to
terminal 22. Use terminal 21 (not COM) as the negative terminal for best accuracy. Note
that terminal 21, 23, and COM are connected.
21. Negative terminal for 40VDC / 5ADC (terminal 20) output.
22. Positive Terminal for the 40VDC / 5ADC output. This terminal is physically connected to
terminal 20. Use terminal 23 (not COM) as the negative terminal for best accuracy.
23. Negative terminal for 40VDC / 5ADC (terminal 22) output.
24. CE (Cancel Entry): Press to cancel a programming entry.
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Version 1.6 7/04
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