![background image](http://html1.mh-extra.com/html/omega/fma-4000/fma-4000_user-manual_4125672022.webp)
18
Analog output signals of 0-5 Vdc and 4-20 mA are attained at the appropriate pins of
the 15-pin “D” connector (see
Figure b-1
) on the side of the FMA 4000 transducer.
Table VI
Analog Output Jumper Configuration
See APPENDIX IV for actual jumpers layout on the PCB.
6. MAINTENANCE
6.1 Introduction
It is important that the Mass Flow Meter is only used with clean, filtered gases.
Liquids may not be metered. Since the RTD sensor consists, in part, of a small
capillary stainless steel tube, it is prone to occlusion due to impediments or gas
crystallization. Other flow passages are also easily obstructed.
Therefore, great care must be exercised to avoid the introduction of any potential
flow impediment. To protect the instrument, a 50 micron (FMA 4000) filter is built
into the inlet of the flow transducer. The filter screen and the flow paths may require
occasional cleaning as described below. There is no other recommended mainte-
nance required. It is good practice, however, to keep the meter away from vibra-
tion, hot or corrosive environments and excessive RF or magnetic interference.
If periodic calibrations are required, they should be performed by qualified per-
sonnel and calibrating instruments, as described in section 7. It is recommended
that units are returned to Omega
®
for repair service and calibration.
ANALOG SIGNAL
OUTPUT
0-5 Vdc
4-20 mA
Flow Rate Output
Jumper Header J7
J7.A
J7.B
J7.C
5-9
6-10
7-11
J7.A
J7.B
J7.C
1-5
2-6
3-7
Note:
Digital output (communication) is simultaneously available with
analog output.
CAUTION:
TO PROTECT SERVICING PERSONNEL IT IS
MANDATORY THAT ANY INSTRUMENT BEING SERVICED IS
COMPLETELY PURGED AND NEUTRALIZED OF TOXIC,
BACTERIOLOGICALLY INFECTED, CORROSIVE OR RADIOACTIVE
CONTENTS.
Содержание FMA 4000
Страница 1: ...www omega com e mail info omega com User sGuide FMA 4000 Digital Mass Flow Meters Shop online at...
Страница 50: ...46 APPENDIX IV COMPONENT DIAGRAM TOP COMPONENT SIDE Aug 09 2007...
Страница 51: ...47 BOTTOM COMPONENT SIDE Aug 09 2007...
Страница 52: ...APPENDIX V DIMENSIONAL DRAWINGS FMA 4000 WITHOUT READOUT 48...
Страница 53: ...FMA 4000 WITH READOUT OPTION 49...