SHIMPO 921A - Manual (Page 42)

C.2
TRICOR Systems Inc.
WARNING
The Service Mode operates the moving platform
at some service mode steps. Never operate the
unit without the platform properly set up with the
test fixture height adjusted to provide a suitable
stop for the platform force transducer.
Step 1 Power down the unit. Disconnect the ac power cord from the
primary power source. Remove the rear panel from the unit
(four screws - figure C.1) and lay down on a flat surface.
Step 2 Adjust the height of the Drive Mechanism to provide a suitable
stop for the platform force transducer.
Step 3 Connect the Drive Mechanism and Resistance Cable (PN 921-
112) to the rear panel connectors per section 2 of the 921A
User's Manual; however, do not connect P2 of the resistance
cable to a nest. Connect the ac power cord to the unit and to
the primary power source. Place the SERVICE/RUN switch on
the unit rear panel in the SERVICE position. Turn on the unit.
The Service Mode is used to perform the calibration/adjustment.
The Service Mode requires pressing the TEST/READY switch
on the front panel to increment or step through the various
service mode display screens. The TEST/READY switch must
be depressed and held for at least 1 second prior to release to
ensure the unit will recognize that the switch is pressed.
Step 4 After successful completion of the power-up self-test, the unit
displays the Force Calibration Mode message. The Force
Calibration will not be performed as part of this procedure.
However, the unit must be sequenced through the service mode
Force Calibration screens by pressing the TEST/READY switch
on the front panel.
Press TEST/READY once- Force Offset Value displayed
Press TEST/READY again - Platform moves until Force Cal
value is reached and stops.