LSO-MAN-ESO-63103-00..
Contents
1. Wait until vacuum has reached lt 10 mbar Start CCC again see 3 2 OB Switch on DETECTOR COLD see 3 6 in Cabinet 2 to resume temperature control of the detector 00 6 Shut down pumps see 3 1 2 nA A W N 2 2 CASE 2 CCC Failure Actions 1 Find cause of the CCC failure a Power cut go to step 2 b Alarm CCC PRESS on compressor front panel Low discharge pressure of compressor Sr Consult CCC manual and charge compressor with high purity He gas O c Alarm CCC TEMP on compressor front panel Overheating of compressor Check cooling of compressor d Alarm LN2 plug in Cabinet 1 Plug not properly placed Put it back into place OO 2 Start CCC again see 3 2 OO 2 3 CASE 3 Power Cut Actions 1 Find cause of the power cut a NTT UPS failure Check circuit brakers on NTT UPS distribution panel Estabilisado and inside of Cabinets 1 and 2 00 b Normal power cut Check circuit brakers on NTT distribution panel Normal and inside Cabinet 1 OO c Cabinet 1 UPS failure Check UPS and if required connect Cabinet 1 to NTT UPS Estabilisado OB Watch out A power cut of Cabinet 1 also cuts the supply of Cabinet 3 In this case Cabinet 3 has to be switched on again manually 2 If power cut is only short lt 5 min approx proceed with 3 2 CCC operation to re activate the CCC 3 After power has been re established a If the power cut has be2. EUROPEAN SOUTHERN OBSERVATORY Organisation Europ enne pour des Recherches Astronomiques dans H misph re Austral Europ ische Organisation f r astronomische Forschung in der s dlichen Hemisph re LA SILLA OBSERVATORY 3 La Silla Instrumentation o SOFI EMERGENCY OPERATING PROCEDURES MANUAL Doc No LSO MAN ESO 63103 0001 Issue 1 2 Date 21 04 2004 li al Ueli Weilenmann 21 04 2004 Ee E WEE Name Date Signature Approved Me ICE shad nate ed eege Ee Name Date Signature Ueli Weilenmann ROA as A da od Name Date Signature La Silla Observatory TELEPHONE 56 2 464 4215 SOFI Emergency Operating Procedures 1 2 LSO MAN ESO 63103 0001 SOFI Emergency Operating Procedures 1 2 LSO MAN ESO 63103 0001 Change Record Issue Rev Date Section Page affected Reason Initiation Document Remarks 1 2 21 04 04 All Fonts and Format corrected 1 1 25 03 04 All Document translated to CMM 1 0 24 03 04 All Creation SOFI Emergency Operating Procedures 1 2 LSO MAN ESO 63103 0001 SOFI Emergency Operating Procedures 1 2 LSO MAN ESO 63103 0001 1 TABLE OF CONTENTS 1 INTRODUCTION 1 El PURPOSE A A Eer 1 1 2 APPLICABLE DOCUMENTS 4 2 22 2 2 es ele il een EN EA da ne ae 1 1 35 REFERENCE DOCUMENTS rosu e AE a a Edel 1 14 ABBREVIATIONS AND ACRONYMS 0 00 00 0c cece cence nen teen eens 1 LS GLOSSARY Are e MER A EE EEN BEE IRRE TREE H LO SEYEISTIC CONVENTIONS AE e AE eg A Er
3. Make sure that all screws A and C are removed as it will not be possible to remove SOFI if even only one screw is left in Keep an eye on screws A as they are hidden Loosen the clamps on the support jack and the fix point Carefully retract SOFI and SUSI flange by moving the spindle clock wise Fix the clamps on both sides of the support structure and the clamp on the support jack 10 If more space is required the master slave unit of the co rotator can be dismounted as well Refer to 2 5 5 and 3 for this operation Re Installation Follow the procedures described in 3 2 3 3 and 3 4 respectively in reverse order OOO Take special care To clean the optics inside the adapter before attaching the instrument O That the rotator is in the right position 0 383215 before re attaching the instrument That the rotator brake is free at the time the instrument flange is engaging with the centering pins Use the spindle on the central fixation point to approach the rotator slowly and smoothly Clear the platform and remove all parts of the support structure and handling gear Special care has to be taken that the support jack and the fixation point are being removed Reconnect the SUSI FIERA and PULPO cables and coolant hoses Don t forget to realign the cable arms and tighten them If the master slave unit has been removed be careful to mount the unit with the connectors facing down and re connect the cables properly befo
4. the heater fan should be activated This defrost device is ready all the time but despite that it is strongly recommended to follow the actions de scribed below Actions 1 Check Reading of the relative humidity on the Meteo Monitor If the trend is going towards higher humidity and reaches 70 80 as the case when a bad weather front arrives proceed with 2 Otherwise go to 5 2 Take the rH reading on the humidity sensor attached to Cabinet 3 3 If the reading on Cabinet 3 approaches 80 of relative humidity switch off the two air handling units in the instrument room to stop further cooling of the room In extreme cases also the vessel could get wet This has to be prevented in any case 4 Keep the air handling units switched off until the outside relative humidity drops at least below 80 rH 5 Resume operation of the air handling units only next morning after making sure that the humidity problem has vanished 8 SOFI Emergency Operating Procedures 1 2 LSO MAN ESO 63103 0001 3 DESCRIPTION OF ACTIONS 3 1 Pumping Vacuum The pump system can be put into operation at any time provided the Rotator is disabled OO This includes also that the instrument can be pumped when it is cold The TMP provides sufficently good vac uum pressure and this vacuum is oil free Therefore no risk of contaminating the cold optics and detector does exist 3 1 1 Start up Procedure Put the Rotator into 0 position Calibration
5. SM 2 2 CRYOGENIC SAFETY PROCEDURES 3 2 05 Diagnostic vr rn eye w h ey h nee ee te wen he 3 2 1 CASE Bad Vacuum a RR u ins 4 2 2 CASE 22CCC EAU a A a Bae EE 5 2 3 CASE 3 Power Cut zus bogey eb sen een nee here 5 2 4 CASE 4 Temperature Probleme 6 2 5 CASE 5 Cabinet Cooling Problem 7 2 6 CASE 6 High Dew Rent viens odes ee eared es sa ne ces nd AAA 7 3 DESCRIPTION OF ACTIONS 9 3 1 Pumping Vacuna Ka ie Dae ie tebe Die nea ahha aba 9 3 1 1 Startup Procedure reis a nr oe ode eda ee tee e e e 9 3 1 2 Shut down Procedure os enc era ses Se St hw Se nd Ree ae ee eran 9 3 2 Operating COC feeb a tha Adland dill A SE dak A a Tle 10 3 3 Regenerating Sorption Pump aeriene ei a a a eee teen een enn ens 10 34 Warming Up Detector isc tenis eaten A Mew B26 a ER ken 10 3 5 Warming Up Instrument 11 3 6 Cooling Down Detector sirski bn Ae weaned o ORO e ENEE AO BE a 11 3 7 Cooling Down Instrument 11 4 CO ROTATOR INTERLOCK RECOVERY 12 AV DAMOS IC A A lin nl 12 4 2 CASE 1 Limit t S Des na A an als anal en A taa 12 4 3 CASE 2 Mantial stop eu en an dai NEE AE 12 4 4 CASE 3 Master Slave Problem 13 4 5 CASE4 TMP or Vacuum bine sea es Yeates ae DE E 13 4 6 CASE 5 End of Travel 270 Deg 0 cette ene nen n ens 13 AT CASE 6 Power Supply use AS sad 13 5 DIS MOUNTING AND MOUNTING OF SOFT SUSI 2 14 3 1 Installation of Service Gear eis sun tan ra he eat ee eames n
6. have to be substituted with the real content before typing teletype for examples lt name gt in the examples for parts that have to be substituted with the real content before typing bold and italic are also used to highlight words SOFI Emergency Operating Procedures 1 2 LSO MAN ESO 63 103 0001 3 2 CRYOGENIC SAFETY PROCEDURES Normally the SOFI OS supplies all the tools to supervise the thermal and cryogenic status of the instrument The command isiStatus amp on wsofi activates a panel which displays all available information In case that this tool is not available it is recommended that the operator checks at least twice a day e the temperatures see Table 3 e the vacuum pressure lt 10 mbar on Balzers Vacuum Meter e the proper function of the CCC compressor is running discharge pressure at 20 bar Every emergency action can be divided in three levels e Alarm Acknowledgment e Diagnostic of Alarm e Recovery Action What happened What is to do Do it Refer to Chapter 2 0 2 1 2 6 3 1 3 6 2 0 Diagnostic When SOFI enters an alarm state the following steps have to be followed 1 Read the alarm message on the alpha numeric alarm display in the control room 2 Check alarm display in the SOFI instrument room inside Cabinet 1 see Table 1 3 Acknowledge alarm and reset siren by pressing the right button on the alarm display 4 Check red status LEDs inside Cabinet
7. is pumping The detector has been warmed up 3 4 Warming Up Detector In any of the following cases the detector will be automatically warmed up e High vacuum pressure e Temperature Alarm 2 Colt Structure gt 130 K If the detector has to be warmed up manually proceed as follows 1 Select DETECTOR WARM push button on control panel in Cabinet 2 10 SOFI Emergency Operating Procedures 1 2 LSO MAN ESO 63103 0001 2 Wait with any other operation until the detector temperature has reached at least 80 K 3 5 Warming Up Instrument This procedure is described in the manual 4 but it can be also the consequence of an emergency recovery The instrument has to be warmed up in the cases of e Rupture of the window or complete vacuum brake down Ice is forming on the vessel or instrument is completely covered with ice e CCC failure which requires servicing of either the compressor or the cold head and therefore an extended period without cooling is to be expected 3 6 Cooling Down Detector Recovery in case of emergency warm up of the detector in the following cases e High vacuum pressure gt 107 mbar e CCC off Procedure 1 Make sure that the vacuum has reached a stable value at around 10 mbar and that the instrument temperatures are normal 2 Press DETECTOR COLD push button on control panel of SOFI Cabinet 2 3 Check that the cryo controller is active and keeps the detector temperature at 65K If the d
8. sphere at 12 00 h Turn key in SOFI Cabinet 1 to disable the Co Rotator and Rotator Move the pre vacuum pump close to the SOFI vessel Connect the flexible vacuum hose to the TMP valve after removing the DN25KF blind flange Don t forget to put the vacuum seal back between hose and valve flange and watch out that hose and seal are properly placed before tightening the clamp BR U N ra 5 Switch on the pre vacuum pump by pressing PREVAC PUMP on the control panel of Cabinet 1 The Alarm LED Prevac bad should go out after some seconds if not check the vacuum connections 6 Connect the cable from the TMP control electronics to the TMP 7 Switch Power ON on the control electronics of the TMP 8 Press Start on control electronics of the TMP and wait for the TMP to accelerate to full speed The green LED Accelerating is on Check Rotation meter it should indicate a constant speed increase until the green LED Normal Operation goes on 9 Open now the TMP valve by pressing the button TMP VALVE on the control panel of Cabinet 1 This function is interlocked with the pre vacuum pressure and the TMP Normal Operation status Never try to open the TMP valve when proper operation of the pumps is not evident or vacuum connections are not properly done 10 Pump until vacuum pressure reaches at least 10 4 mbar Normally one can reach a pressure down to lt 10 7 mbar without problem 3 1 2 Shut
9. structure with its inclined top surface facing the telescope Insert the top first from underneath SOFI Be careful not to damage the connectors b Insert 4 screws M16x70 on the bearing and the 4 screws M16x40 on the structure to keep both parts in place do not tighten yet c Insert the M10 screw in the slit on the top of the left post and screw it into the bearing support 13 Push the top of the post into the direction to the telescope by using the screw engaged in the bearing support M10 Use the spindle drive on the fixation point to move the structure and clamp it 14 Tighten all 4 screws M12x40 of the gear box on the base plate Fix the 4 M16 screws on lower end of the post and then the 4 M16 screws on the bearing 15 Check that the structure is well in place and that all screws are tightened SOFI Emergency Operating Procedures 1 2 LSO MAN ESO 63103 0001 15 5 2 Dismounting the SOFI Vessel only without SUSI and the Structure With this procedure only the SOFI vessel will be dismounted i e to open and intervene SOFI O 1 2 Make sure that the support structure is properly mounted see 3 1 Make sure that all cables fibres and cooling hoses between SOFI and SUSI FIERA have been disconnected by ODT Loosen the vertical axis of the cable arm fixations to enable the cable arms to fold when SOFI is being retracted 4 Unfasten the M12 screws which fix SOFI to the structure 5 Retract the inst
10. 1 Normal operation COLD is indicated with a red dot on the label Note down abnormal system parameters alarms values for later troubleshooting 6 Proceed according to Table 2 and find out witch CASE to follow Ur Table 1 Instrument Alarm Indicator Alarm Alarm Indication Explanation 1 High Pressure Vacuum Pressure above 107 mbar 2 LN Plug amp CCC Plug not placed or CCC Failure 3 Cabinet 1 Temp Over Temperature Cabinet 1 4 Cabinet 2 Temp Over Temperature Cabinet 2 5 Cabinet 2 Off Power Failure in Cabinet 2 6 Cabinet 3 Off Power Failure in Cabinet 3 4 SOFI Emergency Operating Procedures 1 2 LSO MAN ESO 63103 0001 Table 1 Instrument Alarm Indicator Alarm Alarm Indication Explanation 7 CCC Failure Closed Cycle Cooler is not o k 8 UPS Alarm Local UPS for Cabinet 1 is not o k Table 2 Emergency Scenarios Alarm First Sign Possible Cause Remedy 1 Vacuum bad CCC failure CASE 2 E EE Cer Window broken CASE 1 Power failure CASE 3 2 CCC switched off High vacuum pressure CASE 1 LN Plug not properly placed CCC failure CASE 2 3 Cabinet Cooling 1 not working Cooling problem CASE 5 4 Cabinet Cooling 2 not working Cooling problem CASE 5 5 Control Cabinet 2 Off UPS power failure CASE 3 6 Control Cabinet 3 Off UPS power failure CASE 3 7 Compressor is not running Normal power fai
11. LD Unit 11 not used gt 12 Instrument Pressure 4 20 mA 15 mA Remark 4 mA corresponds to atmospheric pressure and 20 mA to good vacuum Im mbar The reading on the Balzers indicator may differ from the value that is displayed on the isiStatus panel because an algorithm on the analog output is used for the display of this value in the ICS 2 5 CASE 5 Cabinet Cooling Problem Actions 1 Check if cooling water supply is o k 2 4 bar on Manometers on cooling water manifold on the floor near the rotator cabinet If there is no coolant flow and the feed line is warm the specialist for the maintenance of the cooling plant has to be contacted 2 Cooling problems may also occur when the outside temperature is extremely high and the cooling needs cannot be satisfied any more Open the cabinet doors and get help from MEC O 3 Check the proper operation of the heat exchangers in the cabinets 2 6 CASE 6 High Dew Point In July 99 the Window Defrost Device has been installed and should prevent humidity to condensate on the SOFI window Please refer to the Technical Manual 6 Actions 1 Check the readings dT Td rH and T on the Vaisala humidity sensor outside of Cabinet 3 The readings of dT indicates the margin in degrees between window temperature T and dew point 2 Check inside Cabinet 3 if the Omega Defrosting Controller is active If dT the process value PV is lower than the set point value SP
12. binet 1 11 Put the Rotator back into the normal position calibration sphere at 03 00 h and check that the Co Rotator follows smoothly when rotating SOFI 3 2 Operating CCC The controls for the CCC are found in SOFI Cabinet 1 OO 1 Check that temperatures of the instrument are still o k lt 130K 2 Switch on CCC by pressing button CCC If any alarm is still active the compressor cannot be started remotely from Cabinet 1 In this case try first to remove the alarm condition If this is not possible and the CCC has to be started under all circumstances remove the remote control Fernbedienung cable from the front panel of the compressor and operate the compressor manually The alarm condition CCC Failure will remain or become active This will be the remainder to reconnect the remote control cable once the system has been brought into normal operating conditions again 3 Check that compressor is running and the discharge pressure is at 20 bar 4 Verify that the temperatures are decreasing 3 3 Regenerating Sorption Pump This is a normal maintenance operation the procedure is described in manual 4 It is however recom mended to regenerate the sorption pump as soon as possible after a vacuum brake down as in this case the sorption trap will be saturated This may be done with the instrument warm or cold The regeneration procedure may only be done when e The pumps are operating and the instrument
13. bl 1 3 REFERENCE DOCUMENTS The following documents are referenced in this document 4 VLI MAN ESO Draft VLT Cabinet Cooling System User Manual 5 LSO MAN ESO 63 103 002 Issue 1 1 Defrost Device for SOFI Window Tech Manual 1 4 ABBREVIATIONS AND ACRONYMS CCC Close Cycle Cooler The Leybold equipment consisting of Compressor on the floor and Cold Head mounted on the vessel LN Liquid Nitrogen Pre Vacuum Pump The rotary pump standing on the SOFI platform TMP Turbo Molecular Pump The pump is mounted on the vessel and the electronic control is mounted on the side of the SOFI platform TMP Valve The valve attached to the TMP where the pre vacuum pump is connected to UPS Un interruptible Power Supply 2 SOFI Emergency Operating Procedures 1 2 LSO MAN ESO 63103 0001 Explanations Who may do what The following groups are authorized to do the interventions as indicated in the respective procedures LIN Infrared 0 NTTT NTT Team 2 LIN Optical Detectors MEC Mechanics Team O All from any team Warning The following abbreviations and acronyms are used in this document LSM La Silla Management LSO La Silla Observatory N A Not Applicable TBC To Be Confirmed TBD To Be Defined WG Working Group 1 5 GLOSSARY 1 6 STYLISTIC CONVENTIONS The following styles are used bold in the text for commands filenames pre suffixes as they have to be typed italic in the text for parts that
14. cessary D As the rotator will be disabled from the co rotator interlock condition the interlock override switch in the rotator control cabinet has to be actuated for this operation in order to disengage the rotator brake 0O 4 Open the alarm indicator panel in Cabinet 1 2 screws and flip down the panel a Temporarily bridge the relay contacts 11 and 14 of the relay that has caused the interlock the one with the yellow LED in active of either RE 121 or RE 122 Manually move the rotator out of the HW limit the co rotator should follow See remark in 3 Remove the bridge on relay contacts 11 and 14 Enable manual stop key again and check that the interlock indicator is off VOD ON DN Put the interlock override switch in the rotator control cabinet back to normal 4 7 CASE 6 Power Supply Recovery Action VO 1 Re establish all three phases of the 3x400 VAC power supply 2 Ifrequired call an electrician 3 Check that the interlock indicator is off SOFI Emergency Operating Procedures 1 2 LSO MAN ESO 63103 0001 13 5 DIS MOUNTING AND MOUNTING OF SOFI SUSI 2 This procedure is subject to modifications once the documentation 3 from JLL is available Required Material e Crane e Support Jack for the SOFT structure SUSI flange e Centre slide e Support structure with yellow crane hook attached to it and left side post e Reduction gear box e Screws wrench and normal Allen keys plus long Al
15. down Procedure Sp Do not shut down the pumps in the following cases e When the instrument has not yet reached a temperature of gt 283 K is not yet warmed up completely e When the CCC is not yet running and therefore does not cryo pump the instrument 1 Close the TMP valve with the TMP still running This is allowed as the TMP can cope without the pre vacuum pump for some minutes It simply compresses the gas against the small volume between pump and valve Shut down the TMP by pressing STOP on the TMP control electronics Wait until the yellow LED Brake goes off Switch the power of the TMP control electronics OFF DD A U N Disconnect the cable to the TMP control electronics SOFI Emergency Operating Procedures 1 2 LSO MAN ESO 63 103 0001 9 You must never disconnect this cable while the TMP has not come to a complete halt This could damage the TMP 6 Shut down the pre vacuum pump 7 Disconnect the vacuum hose and attach the blind flange DN25KF again to the TMP valve Do not panic A sucking noise is normal when removing the hose because the pre vacuum is maintained when switching off the pre vacuum pump 8 Remove the pre vacuum pump to the former place on the platform and cover the hose with the plastic cap 9 Check for clearance between SOFI Co Rotator and any other object pumps cables LN dewars etc located on the platform 10 Enable the Co Rotator by turning the key in SOFI Ca
16. e middle rail but without the threaded hook Be careful that no balls are being lost If this is the case re insert them b Push the jack underneath the SOFI structure It may be necessary to disengage the Rotator brake in order to push the support jack properly into the final position Ifthe rotator brake cannot be actuated the by pass switch has to be actuated inside the rotator cabinet Ask an electronics specialist from the NTT team for assistance OO c Engage the threaded hook from above into the slit on the wedge that is mounted on the SOFI structure at 18 00 h pos 14 SOFI Emergency Operating Procedures 1 2 LSO MAN ESO 63 103 0001 d Join the spindle and the thread in the hook through the hole in the wedge Again It may be necessary to disengage the Rotator brake in order to properly screw in the spindle into the hock e Tightly turn the spindle clock wise to support the weight until the cursor is reaching the mark SOFT SOFI only or SUSI FSOFI SUSD depending on the intended intervention f Tighten the clamp on the right side of the jack 5 Turn key to Co Rotator OFF in SOFI Cabinet 1 to disable the Co Rotator and Rotator 6 Dismount the master slave axis between SOFI and Co Rotator a Remove the 3 shells of the protective cover Allen Key 2 b Remove bellow on SOFI side by loosening the 2 screws Allen Key 2 5 and retract it towards the co rotator c Loosen bellow on Co Ro
17. ecovery Action O 1 Put the manual stop key from position Co Rotator STOP into the position Co Rotator ON 2 Check that the interlock indicator on the front side is off 12 SOFI Emergency Operating Procedures 1 2 LSO MAN ESO 63103 0001 4 4 CASE 3 Master Slave Problem Recovery Action YO 1 Stop the co rotator with the manual stop key 2 Re attach coupling 3 Check that the interlock indicator on the front side is off now 4 Check that co rotator and rotator are properly aligned This can easily be seen on the two opposite cable arms the two arms from SOFI and the co rotator must face each other and the cables must go straight from one arm to the other 5 If required adjust potentiometer zero position 6 Enable manual stop key 4 5 CASE 4 TMP or Vacuum Line Recovery Action O amp 1 Disconnect the cable from the TMP or remove the pre vacuum line from the TMP valve 2 Check that the interlock indicator is off 4 6 CASE 5 End of Travel 270 Deg This Action applies also for recovery from second level interlock 6 co rotator misalignment Recovery Action 0 1 Stop the co rotator with the manual stop key 2 Check that co rotator and rotator are properly aligned This can easily be seen on the two opposite cable arms the two arms from SOFI and the co rotator must face each other and the cables must go straight from one arm to the other 3 Align rotator and co rotator manually if ne
18. en long gt 5 min approx and the vacuum pressure is high elo mbar proceed with 3 1 Pumping Vacuum as the vacuum can deteriorate very fast and considerably 6 SOFI Emergency Operating Procedures 1 2 LSO MAN ESO 63103 0001 b Decide whether the instrument has to be warmed up or if it can be cooled again with the CCC alone Normally at temperatures of lt 100K the CCC is capable of cooling alone the instrument back down again but it may take its time up to 72 h c If the power cut is very long and the temperature is above 100K Collimator Lens Temp additional LN cooling may be necessary to shorten the cool down time d If any alarm condition persists try to find out what the cause is In some cases it will be necessary to power cycle the ESTERS temperature scanner to reset the alarms 4 Press DETECTOR COLD push button on control panel of SOFI Cabinet 2 5 Verify that Cabinet 3 is also switched on again 2 4 CASE 4 Temperature Problems Actions 1 Find cause of the temperature problem a Cryo controller failure refer to Conductus LTC 10 manual VO b Sensor problem switch over to spare silicon diode sensor on LTC 10 OY c Pt100 Sensor Problem connect spare Pt100 sensor in Cabinet 2 d Detector heater problem check wiring to vessel and measure heater element resistance 2Q inside vessel O 2 If problem can be solved proceed with 3 7 Cooling down Instrument O 3 If pr
19. etector has been kept at 100 K it will last approx 1 hour until it reaches 65K 3 7 Cooling Down Instrument If the instrument is completely warm follow the instructions in manual 4 The cool down procedure is not intended to be an emergency recovery and therefore it should be handled the normal way Cool down also implies that successful testing of the detector and associated systems has been performed before If the instrument has warmed up only slightly but is still below 100K Collimator Lens Temp recovery of the temperature with the CCC alone is possible just wait for the temperature to stabilize However this may take up to 72 hours SOFI Emergency Operating Procedures 1 2 LSO MAN ESO 63103 0001 11 4 CO ROTATOR INTERLOCK RECOVERY According to the instructions given in chapter 5 6 of manual 2 page 56 to 59 The Co Rotator interlock al ways disables the NTT rotator to prevent the cables hoses fibres and He lines from being damaged When the rotator is moved by hand care should be taken that the misalignment is not too large to prevent damage of the cables and lines Therefore move the rotator slowly and gently If the Co Rotator is disabled the brake of the rotator cannot be operated manually If this is required despite the interlock being engaged somebody from the INC or NTT team should be consulted to assist you to over ride this interlock on the rotator and to actuate the brake 4 1 Diagnos
20. k wise Fix the clamps on both sides of the support structure and the clamp on the support jack If more space is required the master slave unit of the co rotator can be dismounted as well Refer to 2 and 3 for this operation Retracting SOFI Structure SUSI2 Flange completely Following this procedure both SUSI and SOFI will be retracted i e to service the adapter or to have access to the TCCDs in the adapter This procedure applies also when SHARP on DIFA has to be installed For this op eration it is not necessary to dismount SUSI and disconnect its cables Procedure OOO 1 2 Make sure that the support structure is properly mounted see 3 1 and 3 1 point 6 The cursor on the support jack has to be on position SUSI 16 7 8 9 SOFI Emergency Operating Procedures 1 2 LSO MAN ESO 63103 0001 Make sure that the LAN cable to the Calibration Unit LCU lsocal is disconnected And check if there are any other hoses or cables to be disconnected Loosen the vertical axis of the cable arm fixation to enable the cable arms to fold when SOFI and SUSI2 is being retracted Loosen all screws A yellow and C red Do not open white screws B Screws A can only be accessed through a hole in the SOFI structure These screws will not be completely removed Before starting to un screw the instrument study carefully Chapter 3 in 3 Removing the wrong screws may result in a disaster
21. len Keys 6 and 8 If SUSI has to be serviced at the same time as SOFI is being retracted it may be necessary to diconnect and dismount the following elements Disconnect all cables fibres and cooling hoses between SOFI and SUSI FIERA has to be disconnected by ODT The rotator has to be aligned to the proper positions by hand Be carful as the rotator will not be bal anced anymore as soon as elements are being dismounted 1 Disconnect the FIERA boxes Disconnect the SUSI shutter cable Remove the coolant hoses Disconnect and dismount PULPO Disconnect the 2 motor cables to the M4 and Filter Wheel functions Disconnect the optical fibres Disconnect the coax cable LAN to calibration unit LCU Dismount the 2 FIERA electronic boxes with the crane VOD 0 100 UU FW NY Dismount the SUSI cryostat with the crane 5 1 Installation of Service Gear Procedure OOO 1 Put the Rotator into 0 position Calibration sphere at 12 00 h Exact Value 0 383215 Ifthe Rotator is not properly balanced it will be difficult to move it to that angle by remote control In this case it has to be properly positioned by hand see 4 d below 2 Engage the NTT emergency button on anyone side of the Rotator 3 If only the SOFI Cryostat without structure shall be removed proceed to point 5 4 Install the support jack on the middle rail under the SOFI structure a Install the slide with the support jack and the wedge on th
22. lure CASE 3 No chirping Noise from Cold Head CCC failure CASE 2 8 Control Cabinet 1 Off Cabinet 1 Local UPS failure CASE 3 other Vacuum pumps off Normal power failure CASE 3 other Instrument too warm CCC failure CASE 2 other Detector warming up CCC failure CASE 2 other Detector too cold Cryo controller failure CASE 4 other Condensation on Vessel or Window High Dew Point CASE 6 2 1 CASE 1 Bad Vacuum Actions 1 Find cause of the vacuum deterioration a CCC is off This is not dangerous as such but after long operation time a relatively high pressure can build up as cryo pumped gas is being sublimated from the cold head i If pressure is gt 10 mbar go to step 2 ii If pressure is lt 10 mbar go to step 4 b Vacuum leak indicated normally also by Temp Alarm 3 AT gt 10 K i Ifleak can be repaired goto step 2 ii If leak is not found gt go to step 2 and also perform Action 3 5 Warming Up Instrument c Vacuum brake down i Window rupture perform Actions 3 1 Pumping Vacuum 00 and then 3 5 Warming Up Instrument 0 SOFI Emergency Operating Procedures 1 2 LSO MAN ESO 63 103 0001 5 ii Vessel is covered with ice or ice is starting to be formed on the vessel surface due to heat convection at vacuum pressures of gt 10 mbar perform Actions 3 1 Pumping Vacuum and then 3 5 Warm Up Instrument Proceed with action 3 1 Pumping Vacuum 00 immediately
23. oblem could not be solved decide if instrument has to be pumped and warmed up A The ESTER DC24 Temperature Scanner can be used to display the Pt100 temperatures For trouble shooting these readings are most important They are logged also into the ICS and they can be plotted using the RTAP report and history tools See Table 3 Do not press the key PROG on the ESTER front panel This could activate the alarms and the instrument could switch to warm up To recover from any such situation follow CASE 1 Incase of persisting problems after a power failure i e alarms that remain active do a power cycle on the ESTER scanner to reset these alarms To read the temperature values on the ESTER scanner press desired channel and then Enter To step to the next channel press Table 3 Temperature Scanner Values Channel Sensor Normal Range when COLD Unit 1 Pre Cooling 70 0 85 0 K 2 Camera Unit 65 0 80 0 K 3 Radiation Shield 90 0 115 0 K 4 Collimator Lens 65 0 80 0 K 5 Collimator Structure 65 0 80 0 K 6 Filter Wheel Unit 65 0 80 0 K d Sorption Pump 130 0 160 0 K 8 Aperture Wheel 65 0 80 0 K 9 Ambient Temperature 0 0 20 0 C 10 Diff between Amb amp Vessel Surface 0 5 0 ne SOFI Emergency Operating Procedures 1 2 LSO MAN ESO 63 103 0001 7 Table 3 Temperature Scanner Values Channel Sensor Normal Range when CO
24. re turning the rotator Test the proper functioning of the co rotator after all interlocks have been de activated 000 SOFI Emergency Operating Procedures 1 2 LSO MAN ESO 63103 0001 17 18 SOFI Emergency Operating Procedures 1 2 LSO MAN ESO 63103 0001
25. rument on the rail either by pushing it by hand or by using the central fixation point and 5 3 the spindle don t forget to loosen the clamp Once retrieved fix the safety screws on both sides of the structure to prevent the instrument from moving accidentally Retracting SOFI including the Structure withot SUSI Following this procedure the SUSI flange will remain attached to the Rotator and SOFI including SOFI struc ture will be retracted i e to service SOFI or to get access to SUSI2 As the structure is very heavy the front part has to be supported by the support jack on the center rail Procedure OOO 1 2 3 5 4 Make sure that the support structure is properly mounted see 3 1 and 3 1 point 6 The cursor on the support jack has to be on position SOFT Loosen the vertical axis of the cable arm fixations to enable the cable arms to fold when SOFT is being retracted Make sure that all cables fibres and cooling hoses between SOFI and SUSI FIERA have been disconnected by ODT O Loosen all screws B white and C red Do not open yellow screws A Before starting to un screw the instrument study carefully Chapter 3 in 3 Removing the wrong screws may result in a disaster Make sure that all screws are removed as it will not be possible to remove SOFI if even only one screw is left in Loosen the clamp and carefully retract SOFI from the SUSI flange by moving the spindle cloc
26. s 14 5 2 Dismounting the SOFI Vessel only without SUSI and the Structure o ooooooooo 16 5 3 Retracting SOFI including the Structure withot SUSI 0 0 0 ccc eens 16 5 4 Retracting SOFI Structure SUSI2 Flange completely 17 5 5 Rental a 2 2 2222 228 een AE God Go Geta he dd 17 SOFI Emergency Operating Procedures 1 2 LSO MAN ESO 63103 0001 SOFI Emergency Operating Procedures 1 2 LSO MAN ESO 63103 0001 1 1 INTRODUCTION 1 1 PURPOSE This manual shall be a working document which contains in a condensed form all the information which is re quired by the technical staff to operate the instrument in a save way e Cryogenic Emergency Recovery Procedures e Mechanical Operating Procedures e Rotator Co Rotator Interlock Recovery It will be updated whenever necessary and a copies shall be attached to the Cabinet door of the SOFI Control Cabinet and distributed to the technical and operations staff 1 2 APPLICABLE DOCUMENTS The following documents of the exact issue shown form a part of this document to the extent specified here in In the event of conflict between the documents referenced herein and the contents of this document the contents of this document shall be considered as a superseding requirement 1 N MAN ESO 300 091 Issue 1 0 SOFI HW Manual JBR 2 VLT INS 97 0142 Issue 1 SUSI SOFI Handling Procedures JLL 3 LSO MAN ESO 63 103 0002 Issue 1 0 SOFI Maintenance Manual not yet pu
27. tator side Allen Key 2 5 d Remove axis by disengaging it first on the SOFI side 7 Install the slide with the bolt fixation point on the middle rail 8 Dismount the left post from the support structure 4 screws M16x40 9 Dismount the reduction gear box from the support structure 4 screws M12x40 10 Install the support structure for SOFI attached to the yellow arm using the crane and approaching SOFI from the right hand side a Engage the structure onto the sliders by carefully postitioning the screws on the sliders first and then lowering it with the crane b Watch out that the bolt on the central slider is properly engaged with the spindle drive arm c Fix all 16 screws M8x80 on both sides d Remove the 4 screws M10x80 to dismount the yellow arm and park the crane e Push the support structure on the rails towards SOFI Take care with the cable arms 11 Install the reduction gear on the support structure a Seat the reduction gear onto the support post such that it touches the reference stop b Attach the flange of the reduction gear to the flange of SOFI c Insert the 4 screws M12x40 with washers to secure the gear Be sure that it touches the reference stop d Insert all 12 hex screws ten M8x30 and two M8x25 and fix them with a 13mm wrench 12 Proceed on the other side by loosening the two M5 screws which fix the bearing to the cabinet structure on the left side of SOFI a Install the left post onto the support
28. tic The following Table 4 shows the Co Rotator interlocks and the last column indicates the corresponding ac tion to be taken Table 4 Co Rotator Interlock Indicator Alarm Alarm Indication Explanation Remedy 1 Upper Limit 5 Deg Out of Range 5 CASE 1 2 Lower Limit 5 Deg Out of Range 5x CASE 1 3 Manual Stop Manual Stop Key is active CASE 2 4 Coupling Disengaged Master Slave Axis not correctly installed CASE 3 5 Turbo Molecular Pump TMP or Pre Vacuum Pump connected CASE 4 6 End of Travel 270 Deg HW Limit reached at 270 CASE 5 7 End of Travel 270 Deg HW Limit reached at 270 CASE 5 8 Power Supply 3 phase Power One ore more Phases off CASE 6 4 2 CASE 1 Limit 5 Deg Recovery Action 9 1 Open the alarm indicator panel in Cabinet 1 2 screws and flip down the panel 2 A DIN module PCB2 can be found in the right corner on the backside of the panel A red LED is lit on the controller left of the switch insdie this module The co rotator can be moved out of the limit by pressing this switch in one or the other direction the velocity can be adjusted with the knob to the right side of the switch initially it should be set to 2 3 The red LED will go out as soon as the co rotator is back inside the 0 5 range 3 Check that the interlock indicator on the front panel is off 4 Flip the panel back up and fix the screws again 4 3 CASE 2 Manual Stop R
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