BARTON
®
MODEL 753A
GAGE PRESSURE TRANSMITTER
User Manual
Part No. 9A-10840, Rev. 02
March 2020
Contents
Safety ............................................................................................................ 2
Section 1—Introduction ................................................................................. 3
General ......................................................................................................... 3
Product Description....................................................................................... 3
Gage Pressure Transducer ...................................................................... 3
Electronic Transmitter................................................................................ 3
Power Supply ............................................................................................ 4
Zero and Span Control.................................................................................. 4
Zero Control .............................................................................................. 4
Span Control ............................................................................................. 4
Specifications
............................................................................................... 5
Section 2—Theory of Operation .................................................................... 7
Basic Components ........................................................................................ 7
Gage Pressure Transducer ....................................................................... 7
Electronic Transmitter................................................................................ 7
Basic Operation ............................................................................................ 7
Surge Voltage Protection Circuit .............................................................. 8
Reverse Polarity Protection ....................................................................... 8
Regulator ................................................................................................... 8
Strain Gage Bridge Network ..................................................................... 8
Signal Amplifier
.......................................................................................... 9
Current Amplifier
........................................................................................ 9
Temperature Compensation.......................................................................... 9
Section 3—Installation, Startup, and Shutdown ........................................ 10
Overview ..................................................................................................... 10
Unpacking/Inspection.................................................................................. 10
Initial Calibration Check .............................................................................. 10
Mounting ..................................................................................................... 10
Wall or Rack Mounting ............................................................................ 10
Piping Guidelines .........................................................................................11
Electrical Connections ................................................................................11
Loop Resistance Calculations ................................................................. 13
Maximum Loop Resistance ..................................................................... 14
