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operations:documentation.eremotecontrol_checklist_midob26
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operations:documentation.eremotecontrol_checklist_midob26 [2015/05/31 00:14] Lucia McCallum |
operations:documentation.eremotecontrol_checklist_midob26 [2017/05/02 01:55] Arwin Kahlon |
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| * **Tsys: S-band Tsys 50 to 70K** | * **Tsys: S-band Tsys 50 to 70K** | ||
| * **Tsys: X-band Tsys 50 to 70K** | * **Tsys: X-band Tsys 50 to 70K** | ||
| - | * **check the receiver position with ''rxp''** Should be -256, +248, +18 (x,y,z) | + | <note important> * **check the receiver position with ''rxp''** Should be -256, +248, +18 (x,y,z). The values may be off by 2-3 mm which is the measurement noise. The 26m live page will have the receiver listed (left side)as "S/X" if all is well.</note> |
| * **Cryogenics**. The command ''cryomon'' will return information on the S/X cryogenics. The lines to look out for are the ''pres'' and ''70k'' values... | * **Cryogenics**. The command ''cryomon'' will return information on the S/X cryogenics. The lines to look out for are the ''pres'' and ''70k'' values... | ||
| * **Cryogenics: Vacuum pressure less than 3.5**. The Vacuum pressure in the S/X dewar should be below this value (measured in microns of Mercury). If it increases above this value, it indicates a leak. Let Brett know. e.g. this readout indicates a vacuum pressure of 1.227 <code>2014.126.09:00:46.53/rx/17(pres),on,a,on,on,on,off,locked,1.227</code> | * **Cryogenics: Vacuum pressure less than 3.5**. The Vacuum pressure in the S/X dewar should be below this value (measured in microns of Mercury). If it increases above this value, it indicates a leak. Let Brett know. e.g. this readout indicates a vacuum pressure of 1.227 <code>2014.126.09:00:46.53/rx/17(pres),on,a,on,on,on,off,locked,1.227</code> | ||
| * **Cryogenics: 70K stage temperature below 65K**. The S/X dewar contains a 20K and a 70K stage. If the 70K stage temperature exceeds about 65K, this indicates the receiver is warming up and needs attention. Contact Brett. e.g. this readout indicates a 70K stage temperature of 167K (not good!) <code>2014.126.09:01:49.97/rx/1F(70k),on,a,on,on,on,off,locked,167.0</code> | * **Cryogenics: 70K stage temperature below 65K**. The S/X dewar contains a 20K and a 70K stage. If the 70K stage temperature exceeds about 65K, this indicates the receiver is warming up and needs attention. Contact Brett. e.g. this readout indicates a 70K stage temperature of 167K (not good!) <code>2014.126.09:01:49.97/rx/1F(70k),on,a,on,on,on,off,locked,167.0</code> | ||
| - | * **Cryogenics: Helium supply pressure above 275 psi**. Use a [[software:monica_26m_cryo|MONICA session on ''newsmerd'' to monitor the Helium supply pressure]]. If it drops below 275 psi, call Brett! The plot might be up in the vnc newsmerd session (Desktop 4). | + | * **Cryogenics: Helium supply pressure above 275 psi**. Use a [[software:monica_26m_cryo|MONICA session on ''newsmerd'' to monitor the Helium supply pressure]]. If it drops below 275 psi, call Brett! **Bear in mind that according to the gas law ''pv = nrt'' the pressure will go down on a cold night.** It is advisable to only call Brett if the pressure is quite below 275 and or there have been massive sudden dips in pressure indicating a leak. The plot might be up in the vnc newsmerd session (Desktop 4). |
| * **Log Monitor audio check button sounds audible beep**. Make sure you can hear the alarms | * **Log Monitor audio check button sounds audible beep**. Make sure you can hear the alarms | ||
| * **Skype**. Make sure Skype is running to allow a chat session with all participating sites plus the on-call person | * **Skype**. Make sure Skype is running to allow a chat session with all participating sites plus the on-call person | ||
| * **System: Check and update [[operations:handover|Handover]] and [[operations:currentissues|Current Issues]] wiki pages** | * **System: Check and update [[operations:handover|Handover]] and [[operations:currentissues|Current Issues]] wiki pages** | ||
| * **System: Any problems or concerns logged**. Anything else of note? Put it in the log | * **System: Any problems or concerns logged**. Anything else of note? Put it in the log | ||
/home/www/auscope/opswiki/data/pages/operations/documentation.eremotecontrol_checklist_midob26.txt · Last modified: 2019/05/15 02:08 by Warren Hankey
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