Suggestions For Transmitter Location; General Piping Guidelines; Procedure To Install Flange Adapters; Table 7 - Suggested Connection Locations - Honeywell ST 700 User Manual

3.5.2 Suggestions for Transmitter Location

Suggests connections based on what is being processed by the system.
Process Suggested Location
Gases Above the gas line.
Liquids Below but near the elevation of
the process connection.
Level with or above the process
connection.
1. For liquid or steam, the piping should slope a minimum of 25.4 mm (1 inch) per 305 mm (1 foot).
2. Slope the piping down toward the Transmitter if it is below the process connection to allow
the bubbles to rise back into the piping through the liquid.
3. If the transmitter is located above the process connection, the piping should rise vertically
above the Transmitter. In this case, slope down toward the flow line with a vent valve at the
high point.
4. For gas measurement, use a condensate leg and drain at the low point (freeze protection may
be required here).

3.5.3 General Piping Guidelines

•
When measuring fluids that contain suspended solids, install permanent valves at regular
intervals to blow-down piping.
•
Blow-down all lines on new installations with compressed air or steam, and flush them with
process fluids (where possible) before connecting these lines to the Transmitter Meter body.
•
Verify that the valves in the blow-down lines are closed tightly after the initial blow-down
procedure and each maintenance procedure thereafter.

3.5.4 Procedure to Install Flange Adapters

The following procedure provides the steps for removing and replacing an optional flange adapter on
the process head.
This procedure does not require that the Meter body be removed from the
Electronics Housing. If flange adapters are being replaced with parts from other
kits (for example, process heads), follow the procedures for the kits and
incorporate the following procedure.
NOTE: The threaded hole in each Flange Adapter is offset from center. To ensure
proper orientation for re-assembly, note the orientation of the offset relative to each
Process Head before removing any adapter.
Revision 2.0
Table 7 – Suggested Connection Locations
The condensate drains away from the Transmitter.
This minimizes that static head effect of the
condensate.
This requires a siphon to protect. the Transmitter from
process steam. The siphon retains water as a fill fluid.
ST 700 Smart Pressure Transmitter User's Manual
Description
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