SOB circulating pump problem
(experts Matt McCulloch and Jerry Va'vra)
Note: a recipe to restart the SOB degasing pump is available here.
The SOB water level is low because the circulating
pump is off.
There should be a red alarm in the ALH channel 'SOB
circulating pump' and, after a few tens of minutes, a yellow alarm on the SOB
water level (without circulating pump the water level goes down slowly).
This problem is not critical as the SOB water will
go down very slowly: unless the alarm level is high (red flag in the ALH),
there is no need to page immediately the DIRC water experts and the problem
should not interfere with data taking. Therefore, our response should depend
on when the problem occurs.
- During week day time (6 am - 3 pm), Matt MacCulloch (or Jerry Va'Vra if
Matt is not around) should be paged: there is no need to try to fix the problem
before he comes in IR2.
- Outside this range, you should try to resurrect the pump by following the
guidance below step by step. if you're not successful, you should e-mail
Matt and Jerry to let them know about the problem. Then, depending on the time
it is (use your common sense!), you should page Matt either immediately or the
following morning (not too early if that's the weekend...). Make sure you're in
IR2 when Matt gets paged to discuss with him.
- Obviously, if the water level is going down quickly
and/or if the alarm level is high, page immediately the water
Go to the DIRC water plant. First, check the following points :
- The power button is in ON position, the "power" light (green) and "run" light (orange) are on
- The "low water" light is off
- The PUMP 2 is selected (WARNING: this setting can change with time, check the green sticker location)
- The two outlet flowmeters (not shown on the picture) are about 1.5 each and the water level in the tank must be between the 2 green marks
- Go directly to the circulating pump : it is noisy or you can feel vibration when you touch it.
Here is the procedure to restart the circulating pump (from Bob Reif). When the circulating pump is not running, the panel is likely to show the following configuration:
To restart it, try the following steps:
- "Power" light ON
- "Low water" light ON (⇒ too much water in the tank)
- "Run" light OFF (flowmeter at 0)
Web Page by Guillaume Therin
- Put the power buttton on ON position (the power light must be ON)
- Check which PUMP (1 or 2) is selected. Switch this button into the OFF position
- Put the RESET/OPERATE button into RESET position. It will automaticaly go back to the OPERATE position
- Select again the PUMP which was previously set.
- The circulating pump should be running now. If
not, further investigations should be let to DIRC water experts and/or SLAC
Last modified: Wed May 3 19:49:24 PDT 2006