In my haste to evaluate the power supply functions I skipped over reviewing the Product Features and Basic Operation, so I'm going to back up and do that in this blog.
Product Features (from the User Manual)
- SIngle output switch mode DC power supply
- Max 30V output voltage, Max 3.75A output current, Max 50W output power
- Handheld design
- Fanless cooling for silent operation
- Four digit LCD display
- Output short circuit protection
- High speed dynamic response
- Automatic protection under power off status
- Automatic output recognition of USB charging port
Physical Specifications
- Black Hard Plastic case with rear kickstand
- Dimensions 185mm x 88mm x 38mm
- Weight 370g
- Operating Temperature 0 to 40C
- Storage Temperature -20 to 70C
- C8 non-polarized power cord
Display
- Backlit LCD, 38mm H x 63mm W
- White backlight, either on or off
- Black characters, 6 levels of contrast (lowest being off)
- Measurement character height 20mm
- Settings character height 8mm
Backlight On, Max Contrast Backlight On, Mid Contrast
Backlight On, Min Contrast Backlight Off, Max Contrast
Modes
- Constant Voltage (CV) - this is the normal mode of operation
- Constant Current (CC) - not a true constant current mode, basically means that supply is in current limit
- USB Charging - voltage fixed to 5.1V, current can be set 0-3.75A (defaults to 2.5A)
Configuration
- Set Output Voltage
- Set Output Current Limit
- Store 1-5 voltage/current value pairs
- Recall 1-5 voltage/current value pairs
Calibration
- Voltage calibration against external reference voltmeter at 5V and 30V
- Current calibration against external reference current meter at 0.5A and 2.75A with 5ohm load
- Recommended annual calibration frequency
Specification (copied from User Manual)
Short video showing basic power supply operation