![background image](http://html1.mh-extra.com/html/omega/fma1800a/fma1800a_user-manual_4128136015.webp)
6.2.2 FMA1700A/1800A Series Max Flow 15 L/min models
Unscrew the inlet compression fitting of meter. Note that the Restrictor Flow
Element (RFE) is connected to the inlet fitting.
Carefully disassemble the RFE from the inlet connection. The 50 micron filter
screen will now become visible. Push the screen out through the inlet fitting. Clean
or replace each of the removed parts as necessary. If alcohol is used for clean-
ing, allow time for drying.
Inspect the flow path inside the transducer for any visible signs of contaminant. If
necessary, flush the flow path through with alcohol. Thoroughly dry the flow paths
by flowing clean dry gas through.
Carefully re-install the RFE and inlet fitting, avoiding any twisting and deforming
the RFE. Be sure that no dust has collected on the O-ring seal.
NOTE: OVER TIGHTENING WILL DEFORM AND RENDER THE RFE DEFECTIVE.
It is advisable that at least one calibration point be checked after re-installing the
inlet fitting-See section (g).
IT IS NOT RECOMMENDED TO ATTEMPT TO DISASSEMBLE, OR REPAIR
MAXIMUM FLOW RATE SERIES MODELS 50 L/min, 100 L/min, 200 L/min,
500 L/min or 1000 L/min. DISASSEMBLY NECESSITATES RE-CALIBRATION.
7.
CALIBRATION PROCEDURES
NOTE: REMOVAL OF THE FACTORY INSTALLED CALIBRATION SEALS AND/OR
ANY ADJUSTMENTS MADE TO THE METER, AS DESCRIBED IN THIS SECTION,
WILL VOID ANY CALIBRATION WARRANTY APPLICABLE.
7.1
Flow Calibration
OMEGA
7
Engineering Flow Calibration Laboratory offers professional calibration
support for Mass Flow Meters, using precision calibrators under strictly controlled
conditions. NIST traceable calibrations are available. Calibrations can also be per-
formed at customers' site using available standards.
Factory calibrations are performed using NIST traceable precision volumetric
calibrators incorporating liquid sealed frictionless actuators. Generally, calibra-
tions are performed using dry nitrogen gas. The calibration can then be corrected
to the appropriate gas desired based on relative correction [K] factors shown in
the gas factor table - see Appendix 2. A reference gas, other than nitrogen, may
be used to better approximate the flow characteristics of certain gases.
11
,
NOTE: REMOVAL OF THE FACTORY INSTALLED CALIBRATION SEALS AND/OR
ANY ADJUSTMENTS MADE TO THE METER, AS DESCRIBED IN THIS SECTION,
WILL VOID ANY CALIBRATION WARRANTY APPLICABLE.
,
Содержание FMA1800A
Страница 27: ...23 APPENDIX 1 COMPONENTS DIAGRAM FMA1700A 1800A METERING PC BOARD...
Страница 33: ...29 PARTS OF THE FLOW METER LEFT AND RIGHT VIEWS FRONT VIEW...
Страница 34: ...NOTES 30...