Data Sheet

2500-249 Controllers and Transmitters

D200037X012

Product Bulletin

34.2:2500

July 2012

Figure 1. Typical Fisher 2500 Controller Constructions with Right‐Hand Mounting Shown

DETAIL OF REVERSE‐ACTING 2503R

ON‐OFF CONTROLLER

DETAIL OF DIRECT ACTING 2502

PROPORTIONAL‐PLUS RESET CONTROLLER

INDICATOR ASSEMBLY DETAIL

DIRECT‐ACTING 2500 CONTROLLER

RESET ADJUSTMENT

3‐WAY BOURDON TUBE VALVE HAS LARGE

PORTS WHICH GREATLY REDUCE CLOGGING

PIPE PLUG INSTEAD OF PROPORTIONAL

VALVE MEANS INTERMITTENT BLEED THAT

MINIMIZES FREEZE UP

SPRING‐OUT

CLEANING WIRE

PROPORTIONAL BAND

ADJUSTMENT

POINTER

INDICATOR AND

BASE PLATES

W5637

W0656‐1

W0648‐1

W0671‐1