Emerson Fisher Level-Trol 2502 Series User Manual

2502 Series Controllers
Instruction Manual
Form 1446
November 2006
3
Table 1. Specifications
Available Configurations
Type 2502: A direct-acting controller which
provides proportional-plus-reset control
Type 2502C: A Type 2502 with a level indicator
assembly
Type 2502F: A Type 2502 with a differential relief
valve
These type numbered products are also
available with reverse action. For example,
Type 2502R, Type 2502CR, and 2502FR
Input Signal
(1)
Liquid Level or Liquid-to-Liquid Interface
Level: From 0 to 100 percent of displacer
length—standard lengths for all sensors are 356
mm (14 inches) or 813 mm (32 inches). Other
lengths available depending on sensor
construction
Liquid Density: From 0 to 100 percent of
displacement force change obtained with given
displacer volume—standard volumes are 980 cm
3
(60 inches
3
) for Types 249C and 249CP sensors,
or 1640 cm
3
(100 inches
3
) for most other 249
Series sensors; other volumes available
depending on construction
Output Signal
(1)
0.2 to 1.0 bar (3 to 15 psig) or 0.4 to 2.0 bar (6 to
30 psig)
Action: Field reversible between direct
(increasing liquid or interface level or specific
gravity increases output pressure) and reverse
(increasing liquid or interface level or specific
gravity decreases output pressure)
Area Ratio of Relay Diaphragms
3:1
Supply Medium
Air or Natural Gas
(2)
Supply Pressure Requirement
1.4 bar
(3)
(20 psig) for 0.2 to 1.0 bar (3 to 15 psig)
output signal or 2.4 bar
(3)
(35 psig) for 0.4 to 2.0
bar (6 to 30 psig) output signal
Maximum Supply Pressure
(4)
3.4 bar (50 psig)
Supply Pressure Consumption
(5)
At 1.4 bar (20 Psig)
Minimum: 0.11 normal m
3
/h (4.2 scfh) at
proportional band setting of 0 or 200 percent
Maximum: 0.72 normal m
3
/h (27 scfh) at
proportional band setting of 100 percent
At 2.4 bar (35 psig)
Minimum: 0.2 normal m
3
/h (7 scfh) at proportional
band setting of 0 or 200 percent
Maximum: 1.1 normal m
3
/h (42 scfh) at
proportional band setting of 100 percent
Performance
Hysteresis: 0.6 percent of output pressure
change at 100 percent of proportional band
Repeatability
(1)
: 0.2 percent of displacer length
or displacement force change
Dead Band
(1)
: 0.05 percent of proportional band
or span
Typical Frequency Response
(1)
: 4 Hz and
90-degree phase shift at 100 percent of
proportional band with output piped to typical
instrument bellows using 6.1 meters (20 feet) of
6.4 mm (1/4 inch) tubing
Ambient Temperature Error: $1.5 percent of
output pressure change per 50_F (28_C) of
temperature change at 100 percent of
proportional band when using sensor with
standard-wall N05500 torque tube with 249 Series
sensors
Reset
(1)
: Adjustable from 0.01 to 74 minutes per
repeat (100 to 0.01 repeats per minute)
Differential Relief (Type 2502F and 2502FR
Controllers Only): Adjustable from 0.1 to 0.48
bar differential (2 to 7 psi) to relieve excessive
difference between proportional and reset
pressures. Differential relief can be switched
between rising output pressure and falling output
pressure.
Standard Tubing Connections
1/4-inch NPT female
Maximum Working Pressures (Sensors Only)
Consistent with applicable ASME
pressure/temperature ratings
(continued)

Emerson Fisher Level-Trol 2502 Series Specifications

General

Brand	Emerson
Model	Fisher Level-Trol 2502 Series
Category	Controller
Language	English