Emerson Fisher Level-Trol 2502 Series, Instruction Manual

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D200126X012
2502 Series Level-Trol
R
Controller
Contents
Introduction 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Scope of Manual 1 . . . . . . . . . . . . . . . . . . . . . . . . .
Description 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Specifications 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Educational Services 2 . . . . . . . . . . . . . . . . . . . . . .
Installation 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
249 Series Sensors 4 . . . . . . . . . . . . . . . . . . . . . . .
Uncrating 5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Controller Orientation 5 . . . . . . . . . . . . . . . . . . . . .
Controller-Sensor Action 5 . . . . . . . . . . . . . . . . . . .
Mounting Caged Sensors 6 . . . . . . . . . . . . . . . . . .
Mounting Cageless Sensors 7 . . . . . . . . . . . . . . .
Side-Mounted Sensor 8 . . . . . . . . . . . . . . . . . . . .
Top-Mounted Sensor 8 . . . . . . . . . . . . . . . . . . . .
Regulator Supply Pressure 9 . . . . . . . . . . . . . . . .
Prestartup Checks 9 . . . . . . . . . . . . . . . . . . . . . . . . .
Adjustments 11 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Level Set Adjustment 11 . . . . . . . . . . . . . . . . . . .
Proportional Band Adjustment 11 . . . . . . . . . . . .
Reset Adjustment 11 . . . . . . . . . . . . . . . . . . . . . .
Differential Relief Adjustment 12 . . . . . . . . . . . .
Calibration 12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Precalibration Requirements 12 . . . . . . . . . . . . . .
Wet Calibration 12 . . . . . . . . . . . . . . . . . . . . . . . . .
Dry Calibration 12 . . . . . . . . . . . . . . . . . . . . . . . . .
Controller and Torque Tube Arm
Disassembly 12 . . . . . . . . . . . . . . . . . . . . . . . .
Determining Suspended Weight
for Calibration 13 . . . . . . . . . . . . . . . . . . . . . . .
Calibration Procedure 14 . . . . . . . . . . . . . . . . . . . .
Startup 15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Principle of Operation 15 . . . . . . . . . . . . . . . . . . . . .
Type 2502 Controller 15 . . . . . . . . . . . . . . . . . . . . .
Type 2502F Controller with Reset
Relief Valve 17 . . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance 18 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Troubleshooting 18 . . . . . . . . . . . . . . . . . . . . . . . . .
Removing Controller from Sensor 18 . . . . . . . . . .
Changing Mounting Method 20 . . . . . . . . . . . . . . .
Installing Controller on Sensor 20 . . . . . . . . . . . . .
Changing Proportional, Reset, or
Differential Relief Valve 21 . . . . . . . . . . . . . . . . .
Testing Relay Dead Band 21 . . . . . . . . . . . . . . . . .
Changing Relay 21 . . . . . . . . . . . . . . . . . . . . . . . . .
TYPE 2502
CONTROLLER
249B SERIES SENSOR
W8334
Figure 1. Type 2502 Controller Mounted on
Type 249B Sensor
Replacing Bellows 22 . . . . . . . . . . . . . . . . . . . . . . .
Reversing Action 22 . . . . . . . . . . . . . . . . . . . . . . . .
Parts Ordering 23 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts Kits 23 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts List 23 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Introduction
Scope of Manual
This instruction manual provides installation,
operating, calibration, and maintenance procedures
for 2502 Series pneumatic controllers (figure 1) used
in combination with 249 Series level sensors.
This manual does not include regulator or sensor
installation or maintenance procedures. For this
information, refer to the instruction manual for the
appropriate regulator and 249 Series level sensor.
Instruction Manual
Form 1446
November 2006
2502 Series Controllers