CALIBRATION (April 2005):
CALIBRATION OF VERY OLD FIRST UNBALANCED VERSION LANGEVIN ELOP LIMITER

PURPOSE: To calibrate the ancient first version ELOPs that we haven't built since 1994.  

METHOD: To relate the old board layout to the current Owner's Manual.

UNITS AFFECTED: Serial numbers for units that will benefit from this update are

LOPTO001 (7/1993) through LOPTO021 (2/1994).

FOLLOW CALIBRATION PROCEDURE ON PAGE 11 OF THE CURRENT OWNER'S MANUAL:  

Which can be found online here:
http://www.manleylabs.com/PDF/PRO_Manuals/Langevin/Langevin%20ELOP%20Manual.pdf

REFER TO THE TRIMPOT LOCATIONS AS BELOW

Trimmer "1" adjusts the Power Rail Voltage

Trimmer "2&3" is the Preamp GAIN adjust

Trimmer "6&7" is the Meter Zero Cal

Trimmer "8&9" is the Gain Reduction meter Cal

The other trimpot adjusters referred to in the manual do not exist in this version of Langevin ELOP.

For further info, please contact our service department.
If you would like to send your unit in and have Paul perform this calibration for you, please contact him by filling in the SERVICE FORM or at the address below:

Location of this page online: 

http://www.manleylabs.com/techpage/LOPTO_CALIBRATION.html