Type 2500
Instruction Manual
Form 1013
December 2005
10
through the sensor head access hole after the
sensor is installed on the vessel. Connect the
displacer as shown in figure 8, locking the assembly
with the cotter springs provided. If a stem extension
is used between the displacer spud and the stem
end piece, make sure the nuts are tight at each end
of the stem. Install and tighten suitable cap screws in
the flanged connection to complete the installation.
A special travel stop may be provided on
top-mounted sensors to aid in servicing of the
sensor. This option prevents dropping the displacer
and stem when the displacer rod is disconnected.
Supply and Output Pressure
Connections
WARNING
To avoid personal injury or property
damage resulting from the sudden
release of pressure, do not install any
system component where service
conditions could exceed the limits
given in this manual. Use
pressure-relieving devices as required
by government or accepted industry
codes and good engineering practices.
Figure 9 shows dimensions, locations, and
connections for controller/transmitter installation. All
pressure connections to the controller/transmitter are
1/4-inch NPT female.
Supply Pressure
WARNING
Personal injury or property damage
may occur from an uncontrolled
process if the supply medium is not
clean, dry, oil-free air, or noncorrosive
gas. While use and regular
maintenance of a filter that removes
particles larger than 40 microns in
diameter will suffice in most
applications, check with a Fisher Field
office and Industry Instrument air
quality standards for use with
corrosive air or if you are unsure about
the proper amount or method of air
filtration or filter maintenance.
Figure 9. Controller/Transmitter Dimensions
and Connections
AP4158-D
E0859
176.3
6.94
OPTIONAL HEAT
INSULATOR
EXTENSION
5/6-18 UNC-2B
4 MOUNTING HOLES
ON
j
95.3/3.75 DBC
1/4-18 NPT
OUTPUT CONN
1/4-18 NPT
OUTLET CONN
PLUGGED
TYPE 67CFR
1/4-18 NPT
SUPPLY CONN
VENT
223.8
8.81
117.6
4.63
123.7
4.87
239.0
9.41
255.5
10.06
231.6
9.12
58.7
2.31
TOP VIEW
FRONT VIEW
mm
INCH
BACK VIEW
Supply pressure must be clean, dry air or
noncorrosive gas that meets the requirements of ISA
Standard S7.3.
Use a suitable supply pressure regulator to reduce
the supply pressure to the normal operating supply
pressure shown in table 3. As shown in figure 9, a
Type 67FR filter/regulator mounts on the back of the
controller/transmitter case and mates with the supply
pressure connection on the controller/transmitter
case. Pipe the supply pressure to the IN connection
of the regulator. Typically, the Type 67FR
filter/regulator accepts supply pressures between 2.5
and 17 bar (35 and 250 psig). For specific regulator
limits, refer to the appropriate regulator instruction
manual.
If operating the controller or transmitter from a high
pressure source [up to 138 bar (2000 psig)], use a
high pressure regulator system, such as the Type
