|
40m
QIL
Cryo_Lab
CTN
SUS_Lab
TCS_Lab
OMC_Lab
CRIME_Lab
FEA
ENG_Labs
OptContFac
Mariner
WBEEShop
|
| ATF eLog |
Not logged in |
 |
|
|
 Tue Sep 7 08:12:50 2021, Aidan, Computing, Cymacs, +/-18V power supply to AI/AA chassis was actually +18V, -14.5V 
|
 Tue Sep 7 11:52:40 2021, rana, Computing, Cymacs, +/-18V power supply to AI/AA chassis was actually +18V, -14.5V
|
|
|
Message ID: 2658
Entry time: Tue Sep 7 08:12:50 2021
Reply to this: 2660
|
| Author: |
Aidan |
| Type: |
Computing |
| Category: |
Cymacs |
| Subject: |
+/-18V power supply to AI/AA chassis was actually +18V, -14.5V |
|
|
[Aidan]
I was working in the QIL on Friday and I heard a clicking sound coming from the rack where the DAQ is installed. It turned out to be the DC power supply for the AI/AA chassis. One of the voltage was floating around from ~14.2V to ~14.8V and the unit was clicking as it did this. Since the AA/AI chassis expect +/-18V which is regulated down to +/-15V, this was, to use the scientific term, bad.
I set the low voltage channel back to 18V. We have noticed previous drifts DAC channels - it's possible this was the cause.
|
|
|
|
|