OHRIJA Charger HRH180 Charger Using Adjustable Resistance Calibration Instruction Manual

   OHRIJA Charger HRH180 Charger Using Adjustable Resistance Calibration Instruction Manual

Tools to calibrate voltage and current need to be prepared: Torx screwdriver, small 1-word screwdriver, multimeter, ammeter. If there are other tools can also replace them.

Calibrate voltage and current Step 1: Open the screws around the charger cover (red arrow part)

After opening the cover, confirm the function of each knob. The charger with display screen needs to confirm the knob function of the display screen.

The knob function is as follows:

Calibration voltage:

First use a multimeter to measure the voltage while using a 1-bit screwdriver to turn the VR1 knob to turn right  to reduce the voltage. Turn left to increase the voltage.

Note:
12V: can only be adjusted between DC 10V-17V, beyond which there is a risk of damage.
24V: can only be adjusted between DC 21V-30V, beyond which there is a risk of damage.
36V: can only be adjusted between DC 36V-45V, beyond which there is a risk of damage.
48V: can only be adjusted between DC 50V-59V, beyond which there is a risk of damage.

Chargers with display need to be calibrated synchronously via the intermediate voltage knob on the display panel

Note: The output voltage of the display screen and the charger needs to be consistent, with an error of about 10%.

Calibration current:

After connecting the load, use an ammeter to measure the current. Use a 1-bit screwdriver to turn the VR2 knob to turn right to reduce the current. Turn left to increase the current.

Note:
12V: 180W chargers They can only be adjusted between DC 5A-10Amp, beyond which there is a risk of damage.
24V: 180W chargers They can only be adjusted between DC 3A-5Amp, beyond which there is a risk of damage.
36V: 180W chargers They can only be adjusted between DC 2A-4Amp, beyond which there is a risk of damage.
48V: 180W chargers They can only be adjusted between DC 2A-3Amp, beyond which there is a risk of damage.

The charger with display screen needs to be calibrated synchronously through the knobs on both sides of the display board (coarse calibration and fine calibration)

Note: The output current of the display screen and the charger need to be consistent, with an error of about 10%.

Summary:

Since it is a live operation, special attention should be paid to safety. Tools should not be close to the AC input,

In general, we only need to calibrate the voltage or current, and the trickle charging current in the third stage does not need to be adjusted.

Chargers with a display need to be calibrated synchronously through the knob on the display panel,

The output voltage and current of the display screen and the charger need to be consistent, with an error of about 10%.