If you do some snowcleaning I would like to have the measurements of the mirror before and after the snowcleaning in two different files. I would also like a file with the measurements of the calibration mirror, which is in the little Mellis Griot case.

1. Connect the laser head with the red module (this is the control unit)
2. Take the protection of the head by pulling it off. Do not screw it is a tight fit and not a screw head
3. Clean the white part of the head wit the optical tissue (try not to get any dust in the hole)
4. Switch the control unit ON
5. With the up and down arrows ( ­ and ¯ ) get the arrow ( > ) on the display at " > SETUP " and press ¿
6. Then to " > FILE " and ¿
7. Then to " > ADD FILE " and ¿ to make a new file
8. Use the up and down arrows ( ­ and ¯ ) to get the right letter and the left and right arrows ( ¬ and ® ) to go to the next letter. Make the file name as follows:

WHTPBCO2 or INTPACO2 or CALDATE

WHT = The telescope name (can also be INT or JKT or CAL for calibration)

P = The mirror first letter ( P = primary, S = secondary, N = nasmyth)

B = Before snowcleaning

A = After snowcleaning

CO2 = snowcleaning sign

DATE = date of the calibration

After this press ¿ to save the name

9. Press ESC until you are back in the MAIN MENU
10. Move the arrow to " > MEASURE " to measure the reflectivity
11. Make sure that " > SAVE " is on ALWAYS
12. Put the head on the mirror and press the red button on the measuring head. When it gives the second "beep" then the measurement has been done (you see the results on the screen).
13. Do at least 10 measurements on the mirror (on the WHT at least 10 measurements on each quadrant).
14. Press ESC until you are in the MAIN MENU and OFF to turn the control unit off.

If you want to see a summary of the measurements go to SUMMARY in MAIN MENU and press ¿

Then go to " > FILE " and chose the file you want to see.

When you are done please leave the aluminium in the OPS room. If there are any problems with the handling of the Scattrometer please contact me.

Thanks you for making these measurements,

If you want to download the files from the control unit use the following instructions. You need to have a computer with any Windows version and one spare serial port to connect the RS232 connection.

1. Connect the charger on the main power supply and the serial port of the computer.
2. Insert the red control unit in the charger
3. Switch on the charger with the switch on the back above the power cable
4. Start the Uscan program on the computer. If this is not on the computer you can install or run it from the diskette which is in the black book in the uscan case.
5. Switch the control unit ON
6. With the up and down arrows ( ­ and ¯ ) get the arrow ( > ) on the display at " > RS232 ACCESS " and press ¿
7. On the computer go to FILE and DOWNLOAD in the main menu
8. The link between the computer and the Uscan is made now
9. Make sure the PATH NAME is set where you can find the files
10. Click the files in the menu which you want to download
11. The files are now on the disk under the path name you entered
12. Exit the menu and the Uscan program by following EXIT
13. Send the files attached to an email to Maarten Blanken (mfb@ing.iac.es)
14. I will process the files

The files you have downloaded can be erased from the control unit

1. Make the connection between the control unit and the computer using step 1 to 6 of the previous procedure
2. On the computer go to FILE and DELETE
3. Click the files in the menu which you want to delete
4. Make sure you don't delete any files which are not downloaded onto the computer

Thank you for downloading the files

Please make sure the diskette with the Uscan program is returned in the black book

Maarten Blanken