25
Model 753A Gage Pressure Transmitter
Appendix A
Safety Precautions
Suggested piping diagrams and startup instructions for a typical application is
presented below.
!
WARNING: HIGH-PRESSURE HAZARD. TO PREVENT PERSONAL
INJURY OR DAMAGE TO EQUIPMENT, DIRECT ALL PIPING AWAY FROM
THE OPERATOR WHILE CONNECTING THE GAGE TRANSMITTER TO
THE SYSTEM PIPING.
!
WARNING: EXPLOSION HAZARD. NO ORGANIC COMPOUNDS, OIL,
GREASE, DIRT, OR SCALE OF ANY KIND CAN BE TOLERATED IN AN
OXYGEN INSTALLATION.
Flow Application
IMPORTANT: Assure that the Gage Pressure Transducer input port is connected to the
primary device.
IMPORTANT: To prevent overheating the Gage Pressure Transducer during blowdown,
monitor the temperature by placing your hands on the pipe between the
transducer and the manifold pipe containing the vent valves.
Typical Piping/Startup Example
Gas Flow
The following steps are recommended for a typical gas flow application.
1.
Open the main block valve with the drain/vent valves closed (Figure
A-1).
2.
Slowly open the shutoff valve to pressurize the instrument.
3.
Open the drain/vent valve(s) to bleed off any entrapped gas and then
close them.
Figure A.1—Gas flow
