6 Osmetech OPTI™ Repair Procedures
6-22
Service Manual – Osmetech OPTI™ Analyzer
Installation
Upon reassembly, make sure the tubes from the clean-out port and the peristaltic
pump are connected to the correct nipples and the cable connector is reconnected
to the main board. The tubes should
not
be crossed.
To add a new Lee valve, resolder the wires of the new valve to the harness. The
valve is not polarized. Add LockTite to the mounting screws. Do not over tighten
the screws, since this may damage the valve.
To re-install the Aerodyne module, you must use
new
screws DS7000. The
screws must be tightened such, that the two black rubber pads are compressed to
a thickness of 1.6mm. Use a feeler gauge to check the compression.
Verification
To test the gas module proceed as follows:
•
Insert the bottle into the Osmetech OPTI to be tested. Power on the unit.
•
Go to
DIAG3 – GValve
and press
ENTER
. This will activate the gas
valves and pressurize the entire gas system including the pump cartridge.
•
Toggle the GValve on/off and listen for a ‘click’ sound from the
activating valve.
To test the
Aerodyne module output flow
, proceed as follows:
•
Take a
full
gas bottle and insert the bottle into the Osmetech OPTI.
•
Go to
DIAG3 – GValve
and press
ENTER
. Press the right arrow key to
de-activate the gas valves.
•
Remove the pump cartridge.
•
Press the left arrow key once and listen for gas coming out the rear pump
port. Press the left arrow key right away to deactivate the gas valve.
•
If you cannot hear the gas flow, the gas manifold module needs to be
replaced.
Display Assembly
Removal
The Osmetech OPTI CCA uses a backlit LCD display module to display
operating instructions and analyzer results. To remove the LCD display, first
open the lower portion of the analyzer and disconnect the ribbon cables J13 and
J5 on the main board. The storage compartment and gas manifold module must
also be removed. Next remove the four (4) screws which hold the LCD display
assembly in place. The assembly can now be removed.
