Sierra FLAT-TRAKTM 780S - Manual (Page 15)

Series 780S Instruction Manual Chapter 2 Installation
IM-78S-B 2-3
To install the flow meter:
1. Turn off the flow of process gas. Verify that the line is not pres-
surized. Confirm that the installation site meets the minimum up-
stream pipe diameter requirements shown in Table 2-1.
2. Prepare the fluid connection fittings or flanges in the pipeline.
(Fitting components should be blown clean with filtered gas be-
fore use.) Mount in a vertical position. For horizontal pipelines
having a process gas temperature above 300° F (130°C), mount the
flow meter at a 90-degree angle to avoid overheating the electron-
ics enclosure.
3. Seat the flow meter level and square on the mating fluid connec-
tions with a gasket in place for each side for flange types. (Make
sure both gaskets are smooth and even with no gasket material
protruding into the flow profile; obstructions in the pipeline could
cause inaccurate flow measurement.) Make sure that the flow di-
rection indicator is pointing downstream in the direction of flow.
4. Secure the fluid connections as specified in the technical guidelines
furnished by the fitting or flange manufacturer.
5. If needed, adjust the optional display to the desired orientation,
as follows.
Changing Display Orientation (Hazardous-Area Enclosures Only)
Depending on installation requirements, you may need to change the
position of the optional display. To rotate the display board:
1. Use a 1/16-inch hex key to loosen the set screw securing the
larger end of the enclosure. Turn cover counterclockwise and
remove.
2. Remove 4 screws and standoffs from the display. Release the
latch securing the display ribbon cable connector from the dis-
play board.
3. Rotate the display board to the desired position. Re-connect the
ribbon cable to the display board.
4. Replace the 4 screws and standoffs. Replace the enclosure
cover. Tighten set screw.
Caution!
When using toxic or cor-
rosive gases, purge the
line with inert gas for a
minimum of four hours at
full gas flow before in-
stalling the flow meter.