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chara:night_time_pop_changes [2022/01/10 23:16] charaobs |
chara:night_time_pop_changes [2023/02/13 18:10] 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 2020 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.) | ||
- | It is proper protocol for the PI's, remote or visiting scientists to announce any PoP changes 10 minutes before needed so the operator can bring up the required windows. Please give the PoP's for only the telescopes that need changing. Use this format: E1 → 1, E2 → 2, W1 → 5, etc. Give the desired PoP only. | + | It is proper protocol for the PI's, remote or visiting scientists to announce any PoP changes 10 minutes before needed so the operator can bring up the required windows. Please give the PoP's for only the telescopes that need changing. Use this format: E1-1, E2-2, W1-3, etc. Give the desired PoP only. |
- | * Unlock Tiptilt on all beams on the obsgtk or Tiptilt Servo GUI. | + | * Unlock Tiptilt on all beams on the obsgtk or Tiptilt Servo GUI if using lab tiptilt. Turn off all auto alignments with the STOP ALIGN button on CD or STOP A button on the obsgtk. Turn off the LABAO servo and set the DM to the default flat. |
- | * If the telescopes are still pointing at a star, make sure to periodically check the AZ/EL status on the telescope servers during the POP change procedure. If the telescopes ever get too low or start drifting, click [STOW] to safely stow the telescopes until after the POP change finishes. | + | * If the telescopes are still pointing at a star, make sure to periodically check the AZ/EL status on the telescope servers during the POP change procedure. If the telescopes ever get too low or start drifting, click [DISABLE] to stop the telescopes until after the POP change finishes. |
- | * Make sure that the cart involved is further back than 2 meters. Do not do a PoP change with a cart on the front switch. | + | * The new PoPs can be sent to ople before the PoP change to get the carts in place sooner. |
+ | * Make sure that the cart involved is further back than 2 meters. Do not do a PoP change with a cart on or near the front switch. Stop any cart nearing the front switch until the PoP is changed on that cart. | ||
* Turn on the camera with the ON button at the top of the obsgtk | * Turn on the camera with the ON button at the top of the obsgtk | ||
* On the CONTROL tab, select the M10 camera with the M10AL button | * On the CONTROL tab, select the M10 camera with the M10AL button | ||
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* Open the " | * Open the " | ||
* 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 (< | + | * Check to make sure the counts are not saturating (< |
- | * You should now see the laser appear on the " | + | * You should now see the laser appear on the " |
- | * 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. | + | * If the spot is too dark or too bright, |
+ | * On the POPPERIGTK, turn on the power to the telescope you want to change the PoP on. | ||
* Click the PoP you want and both the PoP mirror and periscope will move to make the change. | * Click the PoP you want and both the PoP mirror and periscope will move to make the change. | ||
* During the process above, the laser beam will have disappeared from the " | * During the process above, the laser beam will have disappeared from the " | ||
- | * After each telescope is complete to this point, turn OFF the power and move to the next telescope. Only one can be going at a time. | + | * After each telescope is complete to this point, turn OFF the power on the popperi for the beam that is completed |
- | * You will need to finish | + | * Finish |
* Make sure the POPPERIGTK powers are off to each scope when finished as the spot can move slightly when it is turned off. | * Make sure the POPPERIGTK powers are off to each scope when finished as the spot can move slightly when it is turned off. | ||
* Click UP/ | * Click UP/ | ||
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* Open the M5 cover. Turn off the camera with the OFF button at the top of obsgtk. Click ACQ to get back to the stars. | * Open the M5 cover. Turn off the camera with the OFF button at the top of obsgtk. Click ACQ to get back to the stars. | ||
* Repeat the above procedure for each telescope that needs a POP change. | * Repeat the above procedure for each telescope that needs a POP change. | ||
- | * After you finish, make sure you change the laser filter back to " | + | * After you finish, make sure you change the laser filter back to " |
* Check the POP Overview to make sure all the POPs are correct. Go to Configuration Tab on Cosmic Debris and click " | * Check the POP Overview to make sure all the POPs are correct. Go to Configuration Tab on Cosmic Debris and click " | ||
* 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 | + | * Updated |
1. Check the small “POP Mirror Control Box” next to the troubled pop underneath the delay line rails. {{: | 1. Check the small “POP Mirror Control Box” next to the troubled pop underneath the delay line rails. {{: | ||
- | < | ||
- | 2. Slide the CONTROL switch on the box to “Local”. The red “Timeout” | + | 2. Slide the CONTROL switch on the box to “Local”. The red “Timeout” |
- | </ | + | Otherwise take the next step. |
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. {{: | 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. {{: | ||
- | 4. This is the type of fuse that you have to use. Look for the cardboard box labeled “Pop Control Box Fuses” in the BC lab. {{: | + | 4. This is the type of fuse that you have to use. Look for the cardboard box labeled “Pop Control Box Fuses” in the BC lab. This box now resides at the E1 Pop 1 location. |
+ | |||
+ | {{: | ||
5. Use tweezers to take out the blown fuse from its holder, and insert a new one. Put the lid back; be mindful of the right orientation with respect to the connectors. (Look at the first picture.) Secure the lid with the screws, and attach the all the connectors. | 5. Use tweezers to take out the blown fuse from its holder, and insert a new one. Put the lid back; be mindful of the right orientation with respect to the connectors. (Look at the first picture.) Secure the lid with the screws, and attach the all the connectors. |