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arachnidlabs / reload-pro

Schematics and code for the Re:load Pro
http://www.arachnidlabs.com/reload-pro/
Apache License 2.0
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More than 2A current is drawn during calibration. #61

Open smorphet opened 9 years ago

smorphet commented 9 years ago

The manual says that the power supply used for calibration must be capable of supplying 2A DC. Mine starts to limit at about 2200mA, so meets this requirement. During the final step of calibration, where the load is pulsing on and off, the last few pulses cause the power supply to go into current limiting. i.e. more than 2A is being drawn.

I don't know if this is affecting the quality of calibration (I have a current error of about 6mA, whereas the specification suggests 2mA).

Firmware is 1.9.

Maybe related to issue #15?

tonyvroon commented 9 years ago

This is still an issue in 1.10; I have observed it drawing as high as 2.27A of current in the final steps of calibration. Your instructions state "a maximum of 2A", which means I would use my Hameg with its nice accurate meters. With this alternate "maximum of 3A" I have to downgrade to a Tenma with only a single digit of read-out accuracy. Please consider either fixing your calibration to stay within the limits you have documented, or fix the documentation to match reality. It does not look like the minimum should be anything less than 2.5A DC.