Emerson Fisher 2500, Instruction Manual

Page: 3 / 40

Instruction Manual
D200124X012
2500 and 2503 Controllers/Transmitters
June 2017
3
Table 1. Specifications
Available Configurations
(1)
2500 —Proportional‐only controller
2500C —Proportional‐only controller with indicator
(see figure 10)
2500R —Reverse acting proportional‐only controller
2500S —Differential gap (snap acting) controller. See
changing controller action procedure and figure 15
2500T —Transmitter
2503 —Differential gap controller without
proportional valve; for applications requiring very
little adjustment
Input Signal
Fluid Level or Fluid‐to‐Fluid Interface Level: From 0 to
100% of displacer length—standard lengths for all
sensors are 356 mm or 812 mm
(14 inches or 32 inches). Other lengths available
depending on sensor construction.
Fluid Density:
From 0 to 100% of displacement force
change obtained with given displacer volume.
Standard volume for displacers are listed in table 2.
Output Signal
2500 Controller and 2500T Transmitter: 0.2 to 1 bar
(3 to 15 psig) or 0.4 to 2 bar (6 to 30 psig)
2500S and 2503 Differential Gap Controllers: 0 bar (0
psig) when switched off and full supply [1.4 or 2.4 bar
(20 or 35 psig) nominal depending on controller
output pressure range] when switched on.
Area Ratio of Relay Diaphragms
3:1
Supply Pressure Data
See table 3
(2)
Supply Medium
Air or Natural Gas
Supply medium must be clean, dry, and noncorrosive
Per ISA Standard 7.0.01
A maximum 40 micrometer particle size in the air
system is acceptable. Further filtration down to 5
micrometer particle size is recommended. Lubricant
content is not to exceed 1 ppm weight (w/w) or
volume (v/v) basis. Condensation in the air supply
should be minimized
Per ISO 8573-1
Maximum particle density size: Class 7
Oil content: Class 3
Pressure Dew Point: Class 3 or at least 10
_
C less than
the lowest ambient temperature expected
Maximum Supply Pressure
(2,3)
3 bar (45 psig) to the controller or transmitter. If
controller or transmitter is equipped with an
integrally mounted 67CFR filter/regulator, typical
supply pressure to the regulator is from 2.5 bar (35
psig) to 17 bar (250 psig), maximum. For supply
pressures to the filter/regulator, refer to the
appropriate regulator instruction manual.
Steady‐State Air Consumption
2500 Controllers and Transmitters (2500, 2500C,
2500R, 2500S, and 2500T):
See table 3
2503 Controller: Vents only when relay is exhausting
Proportional Band Adjustment (Proportional‐Only
Controllers)
Full output pressure change adjustable over 10 to
100% of displacer length
(4)
Differential Gap Adjustment (Differential Gap
Controllers)
2500S Controller: Full output pressure change
adjustable from 20 to 100% of displacer length.
(4)
2503 Controller: Full output pressure change
adjustable over approximately 25 to 40% of displacer
length
(4)
Span Adjustment (2500T Transmitter)
Full output pressure change adjustable from 20 to
100% of displacer length
(4)
Set Point (controllers only) or Zero (transmitters
only) Adjustment
For proportional‐only controllers or transmitters,
level adjustment positions the set point or zero for
the fluid level, interface level, or displacer force
change (density) within the displacer length.
For differential gap controllers, level adjustment
simultaneously positions both ends of the gap within
the displacer length.
(continued)