Extech Instruments 382275 User Manual page 9

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 current 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 the power supply is OFF.
2. Use ONLY wires from port 3 (Positive) and 4 (Negative)
3. Switch on the power supply.
4. Vary the external input voltage 0~5V to 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.
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5KΩ
3. Switch the power supply ON.
4. Adjust the 5Kohm variable resistor from one end to other end to check and verify
the full output current range of the power supply.
5. Switch OFF the power supply.
Enabling and Disabling the Output
Use Port 4 and 5 to remotely control the OUTPUT ON/OFF.
1. Open Port 4 and 5 to ENABLE the output (by default)
2. Short Port 4 and 5 to DISABLE the output..
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