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chara:night_time_pop_changes [2022/01/10 23:14]
charaobs 		chara:night_time_pop_changes [2022/01/10 23:16]
charaobs
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 __**Instructions for Changing PoPs During the Night**__ __**Instructions for Changing PoPs During the Night**__
  
-This page has been updated JAN 2021 to reflect the use of the new obsgtks and POPPERIGTK for pop changes.+This page has been updated JAN 2020 to reflect the use of the new obsgtks and POPPERIGTK for pop changes.
  
 (The old version can be found by logging into the wiki and selecting the old revisions icon on the right.) (The old version can be found by logging into the wiki and selecting the old revisions icon on the right.)
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   * Open the "B1" through "B6" shutters on the SHUTTERS GUI for the telescopes that you need to adjust. Also open the [LASER] shutter on the SHUTTERS GUI.   * Open the "B1" through "B6" shutters on the SHUTTERS GUI for the telescopes that you need to adjust. Also open the [LASER] shutter on the SHUTTERS GUI.
   * Turn the Laser Filter to "ND 0.0".   * Turn the Laser Filter to "ND 0.0".
-  * Check to make sure the counts are not saturating on the lab TT server (<64,000) if using it. Turn off the camera if it is too bright.+  * Check to make sure the counts are not saturating (<64,000) on the lab TT gui if using it. Turn off the camera if it is too bright.
   * You should now see the laser appear on the "M10AL" TV screen for the telescopes. There is a small spot near the center of the M5 cover that is used as a reference for aligning the laser beam. If the laser beam doesn't have a well-defined bright or dark spot in the center, you can adjust the focus by opening the "IRIS" gui and clicking [DEC] or [INC] to change the IRIS setting. If you need to, you can click [BEAM] on the IRIS gui; this will close the IRIS and then re-open it to a pre-defined "Beam" position.   * You should now see the laser appear on the "M10AL" TV screen for the telescopes. There is a small spot near the center of the M5 cover that is used as a reference for aligning the laser beam. If the laser beam doesn't have a well-defined bright or dark spot in the center, you can adjust the focus by opening the "IRIS" gui and clicking [DEC] or [INC] to change the IRIS setting. If you need to, you can click [BEAM] on the IRIS gui; this will close the IRIS and then re-open it to a pre-defined "Beam" position.
   * Open the POPPERIGTK from the icon on the upper left screen. Turn on the power to the telescope you want to change the PoP on.   * Open the POPPERIGTK from the icon on the upper left screen. Turn on the power to the telescope you want to change the PoP on.
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   * After you finish, make sure you change the laser filter back to "ND 3.0". Close the "Laser" shutter on the SHUTTERS GUI. Also make sure that the M5 covers are open on all telescopes or the telescopes will not lock on the stars.   * After you finish, make sure you change the laser filter back to "ND 3.0". Close the "Laser" shutter on the SHUTTERS GUI. Also make sure that the M5 covers are open on all telescopes or the telescopes will not lock on the stars.
   * Check the POP Overview to make sure all the POPs are correct. Go to Configuration Tab on Cosmic Debris and click "GET" to get the new configuration. Make sure the POPs update correctly. If the POPs and the ref cart are correct, then click "SEND" to send the new configuration to OPLE and the other servers. You can also check to make sure the configuration is correct on the OPLE GUI Configuration Tab.   * Check the POP Overview to make sure all the POPs are correct. Go to Configuration Tab on Cosmic Debris and click "GET" to get the new configuration. Make sure the POPs update correctly. If the POPs and the ref cart are correct, then click "SEND" to send the new configuration to OPLE and the other servers. You can also check to make sure the configuration is correct on the OPLE GUI Configuration Tab.
-  * Note that carts may go to extreme positions until you slew since they are likely not correct for the current star.  Turn carts off if they are headed for positions beyond 0m or 44m.+  * Note that carts may go to extreme positions until you slew since they are likely not correct for the current star. Turn carts off if they are headed for positions beyond 0m or 44m.
   * Updated 1-10-21 by Norm \\  \\ __**Troubleshooting**__  \\  \\ **1. A pop mirror does not move IN or OUT** \\  \\ When a pop mirror does not move IN or OUT when clicking on the gui, the most likely cause is a timeout which can be reset. Otherwise, the fix is to change a blown fuse at the pop mirror. Below is the procedure on how to fix a timeout and change a blown fuse. \\  \\ Tools needed: \\ Philips screwdriver, A small Allen key, Meter to measure resistance, Tweezers, Replacement fuse (see below at step 1. 4.   * Updated 1-10-21 by Norm \\  \\ __**Troubleshooting**__  \\  \\ **1. A pop mirror does not move IN or OUT** \\  \\ When a pop mirror does not move IN or OUT when clicking on the gui, the most likely cause is a timeout which can be reset. Otherwise, the fix is to change a blown fuse at the pop mirror. Below is the procedure on how to fix a timeout and change a blown fuse. \\  \\ Tools needed: \\ Philips screwdriver, A small Allen key, Meter to measure resistance, Tweezers, Replacement fuse (see below at step 1. 4.
  
 1. Check the small “POP Mirror Control Box” next to the troubled pop underneath the delay line rails. {{:chara:files:pop-trouble_1.png|POP-trouble 1.png}}(Fig. POP-trouble 1) 1. Check the small “POP Mirror Control Box” next to the troubled pop underneath the delay line rails. {{:chara:files:pop-trouble_1.png|POP-trouble 1.png}}(Fig. POP-trouble 1)
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-         2. Slide the CONTROL switch on the box to “Local”. The red “Timeout” led will most likely turn ON and may be one of the green ones (Fwd or Rev limit) indicating the current position of the pop. {{:chara:files:pop-trouble_2.png|POP-trouble 2.png}}(Fig. POP-trouble 2) Try to use the RESET button: push it with a small enough Allen key. Slide the command switches according to the chart on the box to command the mirror to the other position. Wait about a minute. If the other green led will come on indicating that the mirror moved, then you are done. It was a simple timeout. Otherwise take the next step.+       2. Slide the CONTROL switch on the box to “Local”. The red “Timeout” led will most likely turn ON and may be one of the green ones (Fwd or Rev limit) indicating the current position of the pop. {{:chara:files:pop-trouble_2.png|POP-trouble 2.png}}(Fig. POP-trouble 2) Try to use the RESET button: push it with a small enough Allen key. Slide the command switches according to the chart on the box to command the mirror to the other position. Wait about a minute. If the other green led will come on indicating that the mirror moved, then you are done. It was a simple timeout. Otherwise take the next step. 
 + 
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 3. Disconnect all the cables; take the box off the velcro and to a convenient place. Unscrew the four Philips screws at the corners and slowly take off the lid. Do not disconnect the wires inside the box. On the backside of the lid you will see two fuses. Set the meter to continuity mode, which makes a beep when there is continuity, and check the contact between the two ends of each fuse. ( Fig. POP-trouble 3-4 ) \\ A beeping fuse is good. You have to replace the fuse if the meter does not beep. It could be that both of them were blown. {{:chara:files:pop-trouble_3-4.png|POP-trouble 3-4.png}} 3. Disconnect all the cables; take the box off the velcro and to a convenient place. Unscrew the four Philips screws at the corners and slowly take off the lid. Do not disconnect the wires inside the box. On the backside of the lid you will see two fuses. Set the meter to continuity mode, which makes a beep when there is continuity, and check the contact between the two ends of each fuse. ( Fig. POP-trouble 3-4 ) \\ A beeping fuse is good. You have to replace the fuse if the meter does not beep. It could be that both of them were blown. {{:chara:files:pop-trouble_3-4.png|POP-trouble 3-4.png}}
chara/night_time_pop_changes.txt · Last modified: 2023/06/09 23:40 by charaobs

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