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Calibration
(From the User's Guide PDF that can be found in the repo)
Before initial use, calibrate the Re:load Pro. The calibration procedure requires test leads, a power supply capable of supplying at least 2 amps DC, and a current meter, either integrated into the PSU or discrete.
- Detach all test leads.
- Press in the knob to display the menu. Rotate the knob clockwise until ‘Calibration’ is selected. Press the knob again to select Calibration mode.
- The display will show “Remove Leads”. Press in the knob to perform offset correction.
- Attach a power supply using test leads. The power supply may be configured for any voltage between 1V and 60V, but 9.99V is recommended for best calibration accuracy. If the power supply is equipped with current limiting, the limit must be set to at least 2Amps [Might be more like 2.7amp]. If the PSU lacks an integrated current meter, attach a current meter between the Re:load Pro and PSU.
- A voltage measurement will be displayed. Rotate the knob until the measured voltage matches the actual voltage supplied by the PSU. Press the knob.
- The Re:load Pro now attempts to draw approximately 2 amps from the power supply. Rotate the knob until the current measurement matches the actual draw as measured by the current meter. Press the knob.
- The Re:load Pro now performs internal calibration operations. Once this is complete, the main screen is again displayed, and calibration is complete.
(These apply to firmware versions up to and including 1.9.1, versions after 1.9.1 will have a new calibration routine courtesy of PR #71, and neither of these tips are still necessary.)
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Issue a factory reset before calibrating, especially if the current calibration is significantly incorrect. To perform a factory reset, power on the Reload:Pro and press the knob in as soon as the splash screen appears, then hold it until the main display is shown.
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If the actual current draw appears to "lag" the setpoint for some values (ie the actual current draw is always lower than the setpoint), try using the Cal O command as described here to manually tweak the offset.