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382275/6   V1.0   08/09 

Mode Descriptions 

Control  Mode Selection 

There are four modes: Normal, Preset, Set and Remote Control mode for the power 
supply. Slide the Mode Selection Switch to the desired Mode. The power supply 
defaults to the Normal Mode with maximum current level CC. 

Normal Mode 

Normal Mode is the factory preset mode. The power supply’s output voltage and current 
are controlled by the dual action volume knobs. Push the knobs to toggle the coarse 
and fine tuning; notice the subtle changes in brightness of related LED. Adjust the knobs 
to the desired values by trying coarse and fine tuning. Turn the Current Knob lightly in 
any direction to check the preset current level. The display will resume its normal 
brightness after a few seconds to confirm the adjustment. 

Preset Mode  

In this mode, the Rear Control Light is on to indicate panel voltage and the current 
controls are de-activated.  

There are three preset outputs, P1, P2 and P3. These are selectable by using the 
Recall Switch located on the rear of the power supply. 

The preset values are factory set as shown in the following table. The output rating is 
adjustable.  

 

Presets.

Output Voltage 

Output Current 

P1 5V 

Maximum 

P2 13.8V 

Maximum 

P3 25V 

Maximum 

 

Set Mode  

In this mode the voltage and current remote control can be used at the same time or 
separately.  

1. 

Set the Mode Switch located on the rear of the power supply to the “Set” position. 

2. 

To define the preset output set the Recall Switch to the P1, P2 or P3 position. 

3. 

Use the front panel Voltage Control Knob to set the desired voltage value. 

4. 

Use the front panel Current Control Knob to set the desired current value. 

5. 

Repeat the procedure for the remaining presets: P1, P2 or P3 if desired.  

6. 

Move the Recall Switch from the Set to the Preset position to confirm settings. 

 

Содержание 382275

Страница 1: ...User s Guide Model 382275 and 382276 Single Output Laboratory Grade Switching DC Power Supply ...

Страница 2: ...lly tested and calibrated and with proper use will provide years of reliable service Safety WARNING Do not use this power supply near water Do not operate or touch this power supply with wet hands Do not open the casing of the power supply when it is connected to AC power Refer all servicing to qualified service personnel only Before replacing the fuse identify and fix any problems Replace the AC ...

Страница 3: ...ontrol Indicator LED Switches On when in Preset Remote Control or Set Mode 6 Output Voltage Control Knob Controls both the main and auxiliary output voltage 7 Output Current Control Knob Controls both the main and auxiliary output current 8 Positive Auxiliary Output Terminal Max 5 Amps 9 Negative Auxiliary Output Terminal Max 5 Amps 10 Constant Current Indicator LED ...

Страница 4: ...275 6 V1 0 08 09 4 Rear Panel Description 1 Main Output Max 20 Amps 2 P1 P2 and P3 Recall Switch 3 Cooling Fan for Ventilation 4 AC input Plug and Fuse 5 Remote Control Connector 6 Mode Switch 1 2 3 4 5 6 ...

Страница 5: ...is mode the Rear Control Light is on to indicate panel voltage and the current controls are de activated There are three preset outputs P1 P2 and P3 These are selectable by using the Recall Switch located on the rear of the power supply The preset values are factory set as shown in the following table The output rating is adjustable Presets Output Voltage Output Current P1 5V Maximum P2 13 8V Maxi...

Страница 6: ...nobs The rotary encoder control knobs offer fine coarse tuning with clicking movement 1 Push the knobs to toggle between coarse and fine tuning notice the subtle changes in brightness of the related LED 2 Adjust the knobs to the desired values by using coarse and then fine tuning The display will resume its normal brightness after a few seconds to confirm the adjustment Connecting to UUT Unit Unde...

Страница 7: ...NOTE Choose either method A or B as explained below to use the remote control feature Method A Using A Voltage Source A variable external voltage source of 0 5V is fed into the remote control terminal to adjust the output voltage level Warning Do not input voltages higher than 5V otherwise the Over Voltage Protection OVP will be triggered 1 Ensure that the load is disconnected and that the power s...

Страница 8: ... of the power supply 5 Switch OFF the power supply Remote Control Current 1 Using the same connector plug referred to in the voltage remote control section remove the black portion of the remote control connector plug by removing the screw as shown 2 Solder 3 wires 22AWG to PORT 1 3 4 of the black portion as shown 3 Ensure that the load is disconnected and that the power supply is OFF 4 Plug the r...

Страница 9: ...check and verify for the full output current range of the supply 5 Switch OFF the power supply Method B Using 5Kohm Variable Resistor 1 Ensure that the load is disconnected and that the power supply is OFF 2 Prepare a 5Kohm variable resistor and use wires from Port 1 3 and 4 as shown 1 3 4 5KΩ 3 Switch the power supply ON 4 Adjust the 5Kohm variable resistor from one end to other end to check and ...

Страница 10: ...tch off When this warning appears switch off the unit and remove all loading Check the load and output setting Allow the unit to cool for at least 30 minutes Check if the ventilation is blocked check for clearance around the power supply Listen carefully for the short wind noise from the cooling fan when the unit is powered up again If the fan is not heard upon power up it may be faulty please con...

Страница 11: ...V Default Value is 3V 20 to 30V Default Value is 4V Input Voltage 100 to 120VAC 50 60Hz 382275 210 to 230VAC 50 60Hz 382276 Rated Load Input Current 6 3A Efficiency 86 5 at optimal load Switching Frequency 75 to 95Khz Cooling Method Thermostatic Control Fan from Zero to full speed Protections Overload Short Circuit by Constant Current Output Tracking Over Voltage Over Temperature Special Features ...

Страница 12: ...ure that no water gets inside the equipment to prevent possible shorts and damage to the equipment 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 Care Department for information on calibration services available for this product Extech recommends that annual calibrati...

Страница 13: ...10 for authorization or 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 ...

Страница 14: ...382275 6 V1 0 08 09 14 ...

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