Chapter 2 Installation
Series 810 Instruction Manual
Caution!
Only qualified
personnel should
install the transducer.
1 %). Using the output that is recorded on the data tag will optimize
instrument performance.
8.
Integral Display: The 3 1/2 digit LCD display reads directly in
engineering units or percent of full scale. The full-scale range and gas
are shown on the instrument data tag. The decimal point for the flow
rate is set at the factory and will show automatically (e.g., "5.54"
SLM
or "76.4" %).
9.
Over range conditions are indicated by the display and/or output going
to a high level, approximately 150% of the full-scale range. After the
over-range condition has been removed, it may take several minutes for
the Mass-Trak to recover and resume normal operation.
10. The transducer has stringent power supply requirements. Because the
valve on flow controllers is operated in a control loop, power supply
variations cannot be tolerated. See Appendix B for a complete listing of
power requirements.
Installing the Transducer-Plumbing
Follow the installation instructions that are applicable to your
transducer's process connection. Before use, all plumbing should be
checked carefully for leaks and the transducer should be purged with
dry nitrogen. Ensure that the tubing is free from burrs, or sharp rims
that may result from cutting.
CAUTION: All instruments are leak-tested prior to shipping. To
check your installation, test the fittings only. Do not use liquid leak
detectors such as Snoop® to search for leaks inside or outside the
Mass-Trak. Instead, monitor pressure decay.
Compression Fittings
1.
Position the transducer with the flow
direction arrow pointing in the direction of
flow.
2.
Verify the position of the front and back
ferrule as shown above. Insert the tubing into the fitting. Be sure
that the tubing rests firmly on the shoulder of the fitting and that the
nut is finger-tight. Scribe the nut at the six o'clock position.
3.
While holding the fitting body steady with a backup wrench, tighten
the nut 1-1/4 turns, watching the scribe mark make one complete
revolution and continue to the nine o'clock position. For 1/16-inch,
1/8-inch and 3/16-inch (2, 3 and 4 mm) sizes, tighten only 3/4 turns
from finger-tight. Do not over-tighten!
2-2
IM-81
