Fisher 2506 - Calibration

Instruction Manual
D200129X012
2506/2516 Receiver/Controller
June 2017
16
The factory sets this valve to relieve when the differential pressure between the proportional and reset bellows reaches
5 psi. To set the valve to relieve when the differential pressure is as low as 2 psig, turn the adjustment screw clockwise.
To set the valve to relieve when the differential pressure is as high as 7 psig, turn the adjustment screw
counterclockwise. The minimum differential setting yields the minimum differential set point overshoot during
startup.
Depending on the characteristics of the process, the anti‐reset windup valve can be positioned so that the arrow on
the case points to the letters RE or, to the letter P on the back of the manifold. If the arrow points to P, the valve opens
when receiver/controller output pressure rises. If the arrow points to RE, the valve opens when receiver/controller
output pressure falls.
Calibration
WARNING
The following calibration procedures require taking the controller out of service. To avoid personal injury and property
damage caused by an uncontrolled process, provide some temporary means of control for the process before taking the
receiver/controller out of service. Also refer to the Warning at the beginning of the Maintenance section.
See figure 14 for key number and adjustment locations.
When performing the following calibration procedures, open loop conditions must exist and make provisions to
monitor the output pressure. One way to obtain an open loop is to disconnect the controller output signal line and
install a pressure gauge.
Note
When calibrating a combined controller arrangement such as the 2500 with the 2506 or 2516 (figure 9), calibrate the 2500
controller/ transmitter first.
For a direct action receiver/controller:
1. Adjust the INCREASE OUTPUT PRESSURE adjustment to mid‐range on the scale.
2. Turn the proportional band adjustment to 100 percent of the scale range.
3. For the 2516 only, turn the reset valve adjustment fully clockwise.
4. Adjust the input pressure to 0.6 bar (9 psig) for a 0.2 to 1 bar (3 to 15 psig) or 1.2 bar (18 psig) for a 0.4 to 2 bar (6 to
30 psig) receiver/controller.
5. For the 2516 only, turn the reset valve adjustment fully counterclockwise (to the CLOSED position). This locks 0.6
bar (9 psig) or 1.2 bar (18 psig) in the reset bellows.
6. If the output pressure is 0.6 bar (9 psig) for a 0.2 to 1 bar (3 to 15 psig) or 1.2 bar (18 psig) for a 0.4 to 2 bar (6 to 30
psig) receiver/controller, go to step 8. If not, continue with step 7.
7. If the output pressure span is too low, move the nozzle down towards the flapper, if output pressure is too high,
move the nozzle up. Continue by trial and error until the desired setting is obtained.
8. Adjust the input pressure to 1 bar (15 psig) for a 0.2 to 1 bar (3 to 15 psig) or 2 bar (30 psig) for a 0.4 to 2 bar (6 to
30 psig) receiver/controller.