Revision 5
119
August 2021
11. Repeat steps 8 to 10 to install the O-rings and window for the other window. Look
through the cell and verify that there is an unobstructed light path, with no dirt or other
visible contaminants on the cell windows. It may be necessary to remove one or both
of the SMA connectors to check the light path. Replace the connectors to hand-tight
when done.
12. When both windows are installed, the measurement cell assembly is ready for
reinstallation as described in Section 7.8.
7.8
Measurement Cell Installation
Once the cell windows have been cleaned or replaced, the measurement cell can be reinstalled
in the oven enclosure by following the procedure below.
1. Place the measurement cell in its approximate position focusing on the engagement of
the 3/8” elbow Swagelok
®
fitting connection on the bottom left of the measurement cell
block. Once this fitting is engaged, the aspirator drive air inlet fitting on the top left of
the measurement cell can also be reconnected to finger tight.
2. Hold the heater bracket plate in place behind the measurement cell block with fingers.
Install one (1) of the four (4) ¼-20 x 2" heater bracket screws with a 3/16" ball driver.
Do not fully tighten at this point. A small screwdriver or awl may be used to align the
tapped holes in the bracket with the screw holes in the measurement cell.
3. Install the remaining screws. Once all four screws have been partly screwed in, they
can all be tightened.
4. Install any remaining removed tubing that has yet to be re-installed.
5. Tighten all the Swagelok
®
fitting connections that were opened during the
measurement cell
removal process.
6. Open the Zero Air Flow Control valve to about 2 turns. This will pressurize the
measurement cell and related plumbing to about 20 psig.
7. Open all the sample flow control valves (V1, V3, V5). Leak check all fittings with Snoop
or similar liquid leak detector. Tighten any loose fittings.
8. Connect the short fibre to the SMA fibre connector on the top of the measurement cell.
Connect the long fibre to the SMA fibre connector on the bottom of the measurement
cell. Hand tighten the nuts.
9. Loosen the set screw holding the SMA fibre connector into the measurement cell
slightly so that the SMA fibre connector can rotate and slide in and out.
10. Use the PANEL NEXT / PANEL PREV keys to navigate to the
Spectrum
panel. Adjust
the position of each SMA fibre connector in the measurement cell by rotating it slightly
left and right and sliding it in and out to find the position that gives the greatest
Peak
Height
. Once the optimal position is found for each fibre, re-tighten the set screw.
Содержание 943-TGXeNA
Страница 130: ...Revision 5 130 August 2021 Figure 82 Oven Cabinet Door Removed ...
Страница 131: ...Revision 5 131 August 2021 Figure 83 Control Cabinet Door Removed ...
Страница 132: ...Revision 5 132 August 2021 Figure 84 Power Steam Air Signals Connection Details ...
Страница 133: ...Revision 5 133 August 2021 Figure 85 AC Wiring Schematic ...
Страница 134: ...Revision 5 134 August 2021 Figure 86 DC Signals and Wiring Diagram ...
Страница 135: ...Revision 5 135 August 2021 Figure 87 Flow Diagram ...