2.
INSTALLATION
2.1
Primary Gas Connections
Please note that the FMA 5400A/5500A Mass Flow Controller will not operate
with liquids. Only clean gases are allowed to be introduced into the instrument.
Contaminated gases must be filtered to prevent the introduction of impediments
into the sensor.
CAUTION: It is the users responsibility to determine if the instrument is
appropriate for their OXYGEN application, and for specifying O2
cleaning service if required. OMEGA is not liable for any damage or
personal injury, whatsoever, resulting from the use of this instrument
for oxygen gas.
Attitude sensitivity of the Mass Flow Controller is ±15
F
. This means that the gas
flow path of the flow meter must be horizontal within those stated limits. Should
there be need for a different orientation of the meter, re-calibration may be nec-
essary. It is also preferable to install the FMA 5400A/5500A transducer in a sta-
ble environment, free of frequent and sudden temperature changes, high mois-
ture, and drafts.
Prior to connecting gas lines inspect all parts of the piping system including fer-
rules and fittings for dust or other contaminants. Be sure to observe the direction
of gas flow as indicated by the arrow on the front of the meter when connecting
the gas system to be monitored.
Insert tubing into the compression fittings until the ends of the properly sized tub-
ings home flush against the shoulders of the fittings. Compression fittings are to
be tightened according to the manufacturer's instructions to one and one quarter
turns. Avoid over tightening which will seriously damage the Restrictor Flow
Elements (RFE's)!
Compression fittings should not be removed unless the meter is being cleaned or
calibrated for a new flow range.
Using a Helium Leak Detector or other equivalent method perform a thorough
leak test of the entire system. (All FMA 5400A/5500A’s are checked prior to ship-
ment for leakage within stated limits. See specifications in this manual.)
2.2
Electrical Connection
2
CAUTION: Some of the IC devices used in the FMA 5400A/5500A are
Electro Static Discharge (ESD) sensitive and may be damaged by
improper handling. When wiring the interface connector, adjusting or
servicing the meter, use of a grounded ESD protection wrist strap is
required to prevent inadvertent damage to the CMOS integral solid
state circuitry. When 15 pins interface D-connector is not used do not
remove factory installed ESD protection cover.
