APC AP7921 - minimum current draw to display?

[TestEngJB]

Hi all,

I hope I've put this into the right subforum. I have seen questions on these units here.

I have an APC AP7921 unit that I am using to power one device with a current draw of approximately 0.3A. I can understand that the display on the unit will show 0 but I was hoping that the webmenu/telnet would show 0.3A. However, it does not. Does any one know what the minimum draw is before it will start to update this value?

[Teken · Accepted solution]

It’s approximately 0.8 ~ 0.9 amps on the LED display taking into account manufacturing tolerances. 

If you place a larger amperage draw greater than 1 amp. The system will begin to show some values.

Keeping in mind neither the LED display / Web UI are very accurate to start with. 🤦‍♂️

Questions Ask . . . 👍 

[TestEngJB]

Thanks for your response. It's a shame it won't display from 0.1A onwards, but I suppose that's not its main purpose! 

I was hoping to just use it as an indicator that the unit was indeed turned ON and drawing an expected current +/-100mA (a wide spec!).  No problem though, I already have another method working. Thanks again for your help!