European Southern Observatory New Technology Telescope

General :
Observations :
Operations :

Update temperature focus formulae

Focr and Focb ( red and blue cameras ) encoder position
are computed as a linear function of temperature :

Foc_enc = Foc₀ + Foc₁ x T_emmi

The current value of these coefficients can be found running ccseiMsg
for lemmi / emilcuserver and typing:
 

getconf focr

REPLY 5/L:
Device           "focr",
State            ONLINE,
Simulation       FALSE,
Available        TRUE,
Enabled          TRUE,
Locked           FALSE,
Handset          FALSE,
mode              2,
parOffset         0Enc,
parMode           628 1945 434 1445 79Enc,
parSlope          10.2 20 18.1 27.7 18.1Enc/C,
parRot1           1 1 1 1 1Enc,
parRot2           0 0 0 0 0deg,
Tolerance         0.2C,

getconf focb

REPLY 4/L:
Device           "focb",
State            ONLINE,
Simulation       FALSE,
Available        TRUE,
Enabled          TRUE,
Locked           FALSE,
Handset          FALSE,
mode              2,
parOffset         0Enc,
parMode           0 1945 434 1445 1486Enc,
parSlope          0 20 18.1 27.7 27.7Enc/C,
parRot1           1 0 1 1 1Enc,
parRot2           0 0 0 0 0deg,
Tolerance         0.2C,

parMode contains the values of Foc₀ for
RILD   BIMG   REMD   BLMD   DIMD

parSlope contains the respective values of Foc₁

To change into 645 the value of Foc₀ for RILD mode:

setval focr,parMode 0,645

To change into 21.3 the value of Foc₀ for BIMG mode:

setval focb,parSlope 1,21.3
 

It is then very important to backup this update
clicking backup in the EMMI configuration panel
 

Send comments to: NTT Webmasters <nttweb@www.eso.org> Last Update: MMM DD, YYYY (WHO)