Honeywell ST 3000 - Manual (Page 42)

4.1 Mounting ST 3000 Transmitter,
Continued
Remote seal
mounting Use the procedure in Table 10 to mount a remote diaphragm seal
transmitter model. Figure 10 shows a typical installation for a remote
diaphragm seal transmitter for reference.
ATTENTION
Mount the transmitter flanges within the limits stated here for the given
fill-fluid in the capillary tubes with a tank at one atmosphere.
IF the fill fluid is… THEN mount the flange…
Silicone DC 200 Oil no greater than 22 feet (6.7 meters)
below the transmitter
Silicone DC 704 Oil no greater than 19 feet (5.8 meters)
below the transmitter
Chlorotrifluorethylene no greater than 11 feet (3.4 meters)
below the transmitter.
NOTE: The combination of tank vacuum and high pressure capillary
head effect should not exceed 9 psi (300 mm Hg) absolute.
Table 10 Mounting Remote Diaphragm Seal Transmitter
Step Action
1 Mount transmitter at a remote distance determined by length of
capillary tubing.
2
If Transmitter Model Then Connect Remote
Number is… Seal on…
STR93D or STR12D high pressure (HP) side of
transmitter to lower flange
mounting on tank wall for
variable head H1.
STR13D low pressure (LP) side of
transmitter to lower flange
mounting on tank wall for
variable head H1.
ATTENTION On insulated tanks, remove enough insulation to
accommodate the flange extension.
Continued on next page
32 ST 3000 Release 300 Installation Guide 2/05