2.5 m Counterweight
Settings
All posted settings are subject to
frequent change as modifications to the telescope and instruments are
made. Use these values as a rough guideline only.
|
Instrument
Configuration
|
Counterweight
Position
(inches from
bottom)
|
Counterweight
Readout
(+/- 30 Display
Units)
|
|
Spectrographs* plus Corrector & Cartridge
|
9
|
290
|
|
Spectrographs** (no cartridge or corrector)
|
1
|
30
|
|
Spectrographs* + Corrector
|
7(?)
|
220(?)
|
|
Spectrographs* + Cartridge (no corrector)
|
7
|
220
|
|
Spectrographs** + Engineering Camera
|
4
|
115
|
|
Spectrographs **+ Engineering Camera + Corrector
|
9
|
280
|
|
Spectrographs *+ Imaging Camera *
|
23
|
720
|
|
Spectrographs *+ Cartridge + Hartmann screen without
Conical Light Baffle
|
6
|
200
|
|
Spectrographs *+Engineering Camera + Hartmann screen
without Conical Light Baffle
|
5
|
150
|
* Assumes intermediate dewars are 1/2 full.
** Assumes intermediate dewars are empty.
Values follwed by (?) have not been checked since spectrograph 2
was installed.
Note: The intermediate dewars change the Readout by approx.
50 display units from full to empty.
Conversion factor: 31.25 Display
Units/inch
Send updates, questions and comments to Steph
Snedden at snedden/apo.nmsu.edu
last updated 06/20/00