viii ST 800 Pressure Transmitter User’s Manual Revision 15
List of Figures
Figure 1 – ST 800 Major Assemblies ..................................................................................................................................... 2
Figure 2 – Electronics Housing Components .......................................................................................................................... 2
Figure 3 –Typical ST 800 Name Plate .................................................................................................................................... 3
Figure 4 – Typical Bracket Mounted and Flange Mounted Installations ................................................................................ 8
Figure 5 – Angle Mounting Bracket Secured to a Horizontal or Vertical Pipe ....................................................................... 9
Figure 6 – Inline Model Mounted to an Optional Bracket .................................................................................................... 10
Figure 7 – Rotating the Electronics Housing ........................................................................................................................ 10
Figure 8 – Using a Spirit Balance to Level a transmitter ...................................................................................................... 11
Figure 9 – Tank-Flange Mounted transmitter ....................................................................................................................... 12
Figure 10 – Typical Flush and Flange Mounted Installations ............................................................................................... 12
Figure 11 – Representative Remote Diaphragm Seal Transmitter Installation ...................................................................... 13
Figure 12 – Typical 3-Valve Manifold with Blow-Down Piping ......................................................................................... 14
Figure 13 – Flange Adapter Removal and Replacement ....................................................................................................... 16
Figure 14 – Transmitter Operating Ranges ........................................................................................................................... 16
Figure 15 – Transmitter 3-Screw Terminal Board and Grounding Screw ............................................................................ 17
Figure 16 – Current Loop Test Connections ......................................................................................................................... 20
Figure 17 – Three-Button Option ......................................................................................................................................... 22
Figure 18 – Locating the Failsafe and Write Protect Jumpers .............................................................................................. 82
Figure 19 – Basic Display with Process Variable Format ..................................................................................................... 84
Figure 20 – Standard Display with Process Variable Format ............................................................................................... 84
Figure 21 – Advanced Display Formats with the Process Variable ...................................................................................... 85
Figure 22 – DP Transmitter Head Disassembly .................................................................................................................... 89
Figure 23 – Head Bolt Tightening Sequence ........................................................................................................................ 90
Figure 24 – PWA Replacement ............................................................................................................................................ 91
Figure 25 – Disassembly for Meter Body Replacement ....................................................................................................... 93
Figure 26 – Hardware Location to Remove the Meter Assembly ......................................................................................... 94
Figure 27 – Meter Body Reassembly .................................................................................................................................... 95
Figure 28 – Head Bolt Tightening Sequence ........................................................................................................................ 95
Figure 29 – Local Display Fault Diagnostic Conditions ....................................................................................................... 98
Figure 30 – Angle and Flat Bracket Parts ........................................................................................................................... 101
Figure 31 – Electronic Housing, Display End ..................................................................................................................... 102
Figure 32 – Electronic Housing, Terminal Block End ........................................................................................................ 103
Figure 33 – Transmitter Major Assemblies ......................................................................................................................... 104
Figure 34 - ST 800 Models STD810, 820, 825, 830, & 870 ............................................................................................... 107
Figure 35 – STG830, 840, 870, and STA822, 840 Transmitter Body ................................................................................. 110
Figure 36 – Inline Gauge and Inline Atmospheric Display Bodies .................................................................................... 111
Figure 37 – Flush Mount Meter Body................................................................................................................................. 111
Figure 38 a – Extended Flange Design ............................................................................................................................... 112
Figure 39 – Pseudo Flange design ...................................................................................................................................... 113
Figure 40 – Remote Seal Diaphragm .................................................................................................................................. 113