Brooks Instrument 5866M - Manual (Page 27)

Brooks Instrument Model 5866 Pressure Controller
5-4
8. Remove the three screws (29) and jack posts (32) attaching the
electronics cover. Remove the electronics cover (31).
Be careful not to stress the transducer lead wires to transducer
assembly junction when removing the sensor connector from the
printed circuit board. If the transducer lead wires are stressed, an
open in the transducer wiring could result.
CAUTION
9. Unplug the sensor connector from the printed circuit board. Remove the
two screws (29) securing the bracket (28) and printed circuit board (30).
Remove the bracket and board.
WARNING
Do not remove the transducer before reading the following
instructions. Failure to heed this warning can result in personal
injury.
10.Transducer removal should be avoided. The Model 5866 pressure
transducer is not serviceable and only needs to be removed when the
transducer is replaced or when the O-rings are replaced. Transducer
removal will require the use of compressed gas to force the transducer
from the body. This pressure may exceed the maximum withstand
pressure of the transducer, creating the need for adjustment or
replacement. Be sure the transducer needs to be removed before
proceeding.
11.Remove the two screws (3) from the base plate (27) then reinstall them
2-3 turns into the body. Reinstall the valve stem (6), retaining plate (4)
using the four hex socket screws (3). Cap the outlet port.
WARNING
The screws (3) are to be reinstalled to prevent violent ejection of
the transducer when the pressure is applied. Personal injury can
result if the transducer is not captured by these loose screws.
12.Slowly pressurize the inlet port to force the transducer (26) from the
body (25) and against the loosened base plate (27). Remove the
pressure once the transducer (26) is against the base plate (27).
Remove the base plate (27), transducer (26) and valve stem (6) from
the body (25.)
Do not scratch the transducer O-ring sealing surfaces or touch the
transducer diaphragm surface.
CAUTION
13.Remove the O-ring (5) from the transducer assembly (26). The Teflon
backup ring may remain in place.
Note: Steps 10, 11, 12 and 13 may be eliminated if the transducer is not
to be removed.
B. Cleaning Procedures
Should the Model 5866 Pressure Controller require cleaning due to
contamination with foreign material, use the following procedures: