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chara:night_time_pop_changes [2020/01/21 21:30] charaobs |
chara:night_time_pop_changes [2022/01/10 23:16] charaobs |
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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 → 5, etc. Give the desired PoP only. | ||
- | * Unlock Tiptilt on all beams using the Tiptilt Servo GUI. | + | * Unlock Tiptilt on all beams on the obsgtk or Tiptilt Servo GUI. |
* 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 [STOW] to safely stow the telescopes until after the POP change finishes. | ||
- | * Make sure that the cart involved is further back than 2 meters. | + | * 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. |
- | * Close the M5 cover on each telescope that needs a POP change using Control Tab. | + | * Turn on the camera with the ON button at the top of the obsgtk |
- | * Go to the M10 camera with the M10AL button on the CONTROL tab and the ON button at the top of the obsgtk | + | * On the CONTROL tab, select |
- | * Open the POPs GUI. Click [Overview] to bring up the overview to see the status of which POPs are in. | + | * Close the M5 cover on each telescope |
- | * When reading | + | * Open the POPPERI gtk from a terminal, (usually kept open), with popperigtk |
- | * " | + | |
- | * If the POP overview reports nonsense, then click " | + | |
* Send VisBeams to the correct pair of telescopes that you need to adjust. | * Send VisBeams to the correct pair of telescopes that you need to adjust. | ||
- | * 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 (<64,000) on the lab TT gui if using it. Turn off the camera |
* 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. | + | * 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. |
* 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. | + | * 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. |
* You will need to finish the alignment by adjusting the M10 mirror. | * You will need to finish the alignment by adjusting the M10 mirror. | ||
* 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/ | ||
* Close the shutter for that telescope beam using the SHUTTERS GUI. | * Close the shutter for that telescope beam using the SHUTTERS GUI. | ||
- | * Open the M5 cover for the telescope. Click ACQ to get back to the ACQ view. | + | * 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 "ND 3.0". Close the " | * After you finish, make sure you change the laser filter back to "ND 3.0". Close the " | ||
* 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 " | ||
- | * If you are staying on the same star, go the OPLE GUI and click the [STOP] button at the bottom of the Control Tab. Then click [START] at the bottom of the same tab to restart astrolib in order to send carts to the correct | + | * Note that carts may go to extreme positions until you slew since they are likely not correct for the current |
- | * | + | * 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” 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. {{: | + | 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. {{: |
- | \\ | + | </ |
- | - 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; spare fuses are in there. {{: | + | 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. {{: |
- | \\ | + | 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 | + | 6. Test the box in “Local” mode. Slide the command switches to FWD: 0 1 0 or REV: 0 1 1 to get the mirror moving and hit the Enter button. Wait until the green limit switch led lights up. When the mirror goes against |
- | - 6. Test the box in “Local” mode. Slide the command switches to FWD: 0 1 0 or REV: 0 1 1 to get the mirror | + | 7. If the mirror |
- | - 7. If the mirror still does not move as expected further investigation is needed, and probably the pop box has to be opened after letting air into the pipe. If the mirror moved as expected go to the next step. | + | 8. Slide the CONTROL switch to “Remote”. Make sure you did not leave anything on the rail. |
- | + | ||
- | - 8. Slide the CONTROL switch to “Remote”. Make sure you did not leave anything on the rail. | + | |