Thermo Scientific Omni FTIR Multi Gas CEMS Instruction Manual page 180

Preventive Maintenance and Servicing
Pneumatic Panel Components
5-96 Omni FTIR Multi Gas CEMS Instruction Manual
8. Place the flow meter panel back into position over the studs, then
thread on the 6 nuts that were previously removed. Using the 11/32-
inch nut driver, tighten them until snug
9. Re-install the tubing in the original positions in the fittings of the new
flow meter, and then tighten until snug using the 9/16" wrench.
10. Turn the gas cylinder back on or reset the house air regulator back to
the pressure noted earlier, then push the knob down to lock it.
11. The new flow meter/regulator must now be set to the correct flow rate.
Refer to the Test Certification Sheet (p/n 108865-70) supplied with
the system to see what the original settings were. If the Purge Air flow
meter was replaced, that can be adjusted without further action as there
is no corresponding solenoid valve to activate. Turn the knob on the
flow meter clockwise until the proper setting is achieved.
If any of the other flow meters were replaced, the corresponding
solenoid valve must be activated to be able set the flow rate. If a DCS is
used to control the FTIR system, it can be used to activate the solenoid
valve. Once activated, turn the knob on the flow meter clockwise until
the proper setting is achieved.
Alternately, if a DCS is not being used, the solenoid valve must be
activated manually. For Probe Zero, Probe Span, and Probe Spike,
those solenoids can be activated by pushing in and turning the manual
activation button on the bottom of the valve, which is accessible from
the rear of the pneumatic panel. Once the flow rate is set on the new
flow meter/regulator, de-activate the solenoid valve.
To activate the solenoids for Flow Back and Instrument Zero, the
system needs to be in failsafe mode. This is accomplished by
disconnecting the wire from pin 1 of the Probe I/O (X3) terminal
block on the electrical panel at the rear of the system, using a small flat
blade screwdriver. Once activated, turn the knob on the flow meter
clockwise until the proper setting is achieved. Once the flow rate is set
on the new flow meter/regulator, de-activate the solenoid valves by re-
connecting the wire to the connector on the electrical panel.
12. Re-install the left side panel to complete the procedure.
(Figure 5–62).
Thermo Fisher Scientific