Remote Diaphragm Seal Mounting Information_St 700 Basic Transmitter; Figure 51 - St 700 Basic Transmitter - Representative Remote Diaphragm Seal Transmitter; Table 32 - St 700 Basic Transmitter, Flange Mounting Guidelines; Table 33 - St 700 Basic Transmitter - Remote Diaphragm Mounting Details - Honeywell SmartLine ST 700 User Manual

12.5.5 Remote Diaphragm Seal Mounting Information – ST 700 Basic Transmitter,
The combination of tank vacuum and high pressure capillary head effect should not
exceed nine (9) psi (300mmHg) absolute. For insulated tanks, be sure to remove enough
insulation to accommodate the flange extension. The end user is responsible for supplying a
flange gasket and mounting hardware suitable for the service condition of the transmitter.
Mount the transmitter flanges within the limits in
tubes, with a tank at one (1) atmosphere.
Table 31 – ST 700 Basic Transmitter, Flange Mounting Guidelines
Silicone 200 Oil
Chlorotrifluorethylene (CTFE)
Refer to Figure 51 for a representative remote diaphragm seal installation. Mount the transmitter at a
remote distance determined by the length of the capillary tubing.
Figure 51 – ST 700 Basic Transmitter - Representative Remote
Depending on transmitter model, connect the remote seal to the tank according to Table 32.
Table 32 – ST 700 Basic Transmitter - Remote Diaphragm Mounting
Transmitter
Model
Transmitter High Pressure (HP) Side
STR735D
to tank wall lower flange mounting.
Page 136
Fill Fluid
< 22 feet (6.7 meters) below the transmitter
< 11 feet (3.4 meters) below the transmitter
Diaphragm Seal Transmitter Installation
Details
Connect the Remote Seal on ....
Variable Head
ST 700 SmartLine Pressure Transmitters User's Manual
Table 32 for the fill fluid in the capillary
Mount the Flange...
Fixed or Constant Head
Transmitter Low Pressure (LP) side to
tank wall upper flange.
Revision 13