First encounters
5. Carefully lift off the digitiser module, and unplug the ribbon cable from the
sensor electronics.
6. Attach a Hand-held Control Unit and adapter cable to the ribbon connector,
and power up the sensor through the control unit.
7. Set the
CENTRING SELECT
switch on the Hand-held Control Unit to
1 SEC
VEL
, and the monitoring dial to
V
MASS POS.
8. There are three holes in the topmost electronics board, which provide access
to the offset potentiometers. Insert a screwdriver through the appropriate
hole, and engage the potentiometer for the vertical component.
9. Adjust the potentiometer until the mass position output reads close to zero.
10. Repeat steps 4 – 6 for the north/south and east/west components.
Alternatively
, you can adjust the mass positions and monitor the output digitally.
1. Remove the vent cap, and use a hexagon wrench to remove the screws
holding the digitiser module onto the sensor as above.
15
Issue F - June 2019
