1993/03/10

Here are brief instructions for installing SONIC on the telescope.  I
hope nothing important is left out, but no guarantees!

1) Take the useless CCD off the telescope.  Throw it away.

2) Open the top box shutter, and move the top box filter wheel to an
open position.  Use the fixture provided to hold the top box shutter
open.  Turn off the shutter power, making sure the shutter stays open.
Disconnect the cable to the top box filter wheel so it cannot move.

3) The SONIC should already be cold and mounted on the tilt ring
assembly.  The number of spacers depends on the optics installed as
follows (listed from dewar out to the Kron camera flange): 
0.8: 2-inch anodized spacer, aluminum ring, flange
1.6: aluminum ring, flange
3.5: 2-inch spacer anodized spacer, aluminum ring, flange
(Note: 3.5 is untested.  It may also need the 1 inch anodized spacer.)

4) Position the assembly on the lift so the SONIC is under the top box
with the cooler on the south side.  Make sure helium hoses are not
twisted.  Bolt the assembly onto the telescope with six bolts.  When
safe to do so, remove the lift.

5) Attach the electronics box with brackets on the east side of the
SONIC.  Connect the electronics to the power supply using the special
power cable: a ribbon cable with two extra wires.

6) Use the bungee cord attached to tie helium hoses to the telescope.
The hoses should move as little as possible as the telescope moves.  The
most important thing is to avoid strain on the hose connectors at the
cold head.

7) Attach other cables to electronics: two cables to dewar, one cable to
FIFO, one cable to DRC-91 temperature controller.  Attach cable from pod
controller to dewar filter motor.  Attach heater cable from dewar to
temperature controller.  Plug power supply and temperature controller
into UPS.  Make sure temperature controller RS-232 is attached to the
correct computer port.

8) Set filter dial to position 980.  No need to be extremely accurate.

9) Turn on temperature controller.  Make sure all channels show
reasonable temperatures.  (See separate instructions.)  Monitor channel
"B".  Adjust setpoint to somewhere near 25.7 K.  Push button to put
"heater range" on "-2" scale.  Check that knobs are in marked positions.
Heater power should rapidly rise to near 100%, then drop off as channel
B temperature rises above setpoint.  If this doesn't seem to be working,
check controller writeup.

10) When temperature "A2" gets close to 30.0 K, follow separate
startup instructions.  Check camera voltages as described.  Make sure
camera takes data.  Take and store a data frame or two, then purge
them if you don't want them.

11) Check operation of pod focus, filter motion, top box TV motions,
Mac communications.  Check that top box initial positions are correct
(not the same as CCD).

Removing:

1) Carry out procedures in "shutdown" instructions.  This includes
turning off power supply and cooler and unplugging Vac-Ion.

2) Unplug cables as necessary and remove camera from telescope.

3) Put camera on table in south side of dome and cover with plastic.

or

3A) Disconnect helium hoses.  (Note order as written on cold head.)
Install metal protective covers on hose ends and on the cold head.  Put
camera in a safe place.
 
4) Make sure all SONIC bolts and cables are either with the camera or
put back in the SONIC box in the cabinet in the computer room.