Data Sheet

Level Instruments
D103219X012
Product Bulletin
11.2:Level
February 2015
13
Table 11. Fisher 2500 Controller/Transmitter General Specifications
Controller and Transmitter
Selections
(1)
2500 Proportional pneumatic controller
2502 Proportional‐plus‐reset pneumatic controller
2502F Proportional‐plus reset pneumatic controller with anti‐reset windup
2500T Proportional pneumatic transmitter
2500S Differential gap (on‐off) pneumatic controller with full adjustment
2503 Differential gap (on‐off) pneumatic controller with limited adjustment
Process Sensor Range (Input Signal)
Fluid level or fluid
interface level
From 0 to 100 percent of displacer length
(2)
—standard lengths for all
sensors are 356 mm (14 inches) or 813 mm (32 inches); other lengths
available depending on sensor construction
Fluid density
From 0 to 100 percent of displacement force change obtained with
given displacer volume—standard volumes are 1016 cm
3
(62 in
3
) for
249C and 249CP sensors and 1622 or 1360 cm
3
(99 or 83 in
3
) for
most other sensors; other volumes available depending upon sensor
construction
Allowable Specific Gravity (Standard)
Fluid level or fluid
interface level
2503 and 2503R: Specific gravity range, 0.25 to 1.10
All other types: Specific gravity range, 0.20 to 1.10
Fluid density
2503 and 2503R: Minimum change in specific gravity, 0.25
All other types: Minimum change in specific gravity, 0.20
Set Point Adjustment (Controllers only)
Continuously adjustable to position control point or differential gap
of less than 100 percent anywhere within displacer length (fluid or
interface level) or displacement force change (density)
Zero Adjustment (Transmitters only)
Continuously adjustable to position span of less than 100 percent
anywhere within displacer length (fluid or interface level) or
displacement force change (density)
Reset Adjustment (Proportional‐Plus‐Reset Controllers Only)
Continuously adjustable from 0.005 to over 0.9 minutes per repeat
(from 200 to under 1.1 repeats per minute)
Anti‐Reset Differential Relief (2502F and 2502FR Controllers Only)
Continuously adjustable from 0.14 to 0.48 bar (2 to 7 psi)
differential to relieve excessive difference between proportional
and reset pressures
Output Signal‐‐Direct (Increasing Level Increases
Output) or Reverse Action
Proportional or reset
controllers and
transmitters
0.2 to 1.0 or 0.4 to 2.0 bar (3 to 15 or 6 to 30 psig)
Differential gap
controllers with full
adjustment
0 and 1.4 or 0 and 2.4 bar (0 and 20 or 0 and 35 psig)
Differential gap
controllers with limited
adjustment
0 and full supply pressure
Hazardous Area Classification
2500 controllers/transmitters comply with the requirements of
ATEX Group II Category 2 Gas and Dust
Options
Stainless steel heat insulator assembly
Liquid level sight gauges
Mechanical level indicator
1. Also refer to tables 4, 5, 6, and 7.
2. The torque tube and the displacer must be properly sized for the application in order for 0 to 100% of displacer length to be available.
Table 12. Fisher 2500 Controller/Transmitter Performance
Independent Linearity (Transmitters Only) 1 percent of output pressure change at span of 100 percent
Hysteresis
0.6 percent of output pressure change at 100 percent of proportional band,
differential gap, or span
Repeatability 0.2 percent of displacer length or displacement force change
Deadband (Except Differential Gap Controllers) 0.05 percent of proportional band or span
Typical Frequency Response
4 Hz and 90‐degree phase shift at 100 percent of proportional band,
diferential gap, or span with output pipe to typical instrument bellows using
6.1 meters (20 feet) of 6.3 mm (1/4‐inch) tubing