Mastech HY1503D User Manual

3-4 Setting Current Limit for CV Operation
Note: this step is only needed if it is necessary to set a current limit for constant voltage operation or when
charging a battery; for most of applications requiring constant voltage, simply turn the current knobs to
maximum position, which sets the current limit to the maximum value allowed by the power supply.
1) With no load connected, turn current knobs to minimum position. Turn the power supply on with output stopped.
2) Connect a resistive load between + and – terminals, or temporarily short the + and – terminals of the power
supply with a test lead with sufficient thickness.
3) Push the output button in to enable output.
4) Make sure CC light is red. If needed, adjust the COARSE voltage knob (knob 8) up.
5) Adjust the current control (knobs 5 & 6) to reach the desired current level, repeat 4) if needed.
6) The current limit has now been set. Do not change the current knobs (5&6) if you want to keep the same current
limit, or mark the positions of the knobs 5&6 so you can return to the same level.
7) Stop the output, then remove the load between the ( + ) and ( - ) terminals and go to section 3.3.
4. Trouble Shooting & Maintenance
Warning: The following instructions are to be performed by knowledgeable personnel only. To avoid electrical
shock, do not perform any servicing other than the contained in the operation instructions. For further

Mastech HY1503D Specifications

General

Brand	Mastech
Model	HY1503D
Category	Power Supply
Language	English