Hello !
I have a Compaq branded UPS, model T2400h.
It's making curious unhappy rattling noises when running on battery.
Batteries are brand new and fully charged, and also tested on another identical unit.
I grabbed a video of the noise (starts at 00:18 on the mp4 video at the Goo link below), and also took a couple o'scope shots of the waveform, both on-mains and on-battery.
The scope connection is via a small 12VAC transformer, just to explain the scaled voltage readings in the scope photos. We are on 240V-ish mains here.
Would anyone recognise the noise, and be able to speculate as to the source ?
Such a nice UPS, and would love to save it!
All the photos, video and docs here: https://drive.google.com/drive/folde...IgEtLIrMhmc_88
I will try to attach the scope captures here too!
Thanks for this forum to let me ask here!
Max.
I have a Compaq branded UPS, model T2400h.
It's making curious unhappy rattling noises when running on battery.
Batteries are brand new and fully charged, and also tested on another identical unit.
I grabbed a video of the noise (starts at 00:18 on the mp4 video at the Goo link below), and also took a couple o'scope shots of the waveform, both on-mains and on-battery.
The scope connection is via a small 12VAC transformer, just to explain the scaled voltage readings in the scope photos. We are on 240V-ish mains here.
Would anyone recognise the noise, and be able to speculate as to the source ?
Such a nice UPS, and would love to save it!
All the photos, video and docs here: https://drive.google.com/drive/folde...IgEtLIrMhmc_88
I will try to attach the scope captures here too!
Thanks for this forum to let me ask here!
Max.
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