Emerson Fisher 2500, Инструкция по эксплуатации

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Instruction Manual
D200124X012
2500 and 2503 Controllers/Transmitters
June 2017
33
CAUTION
If the hex clamp nut has not been loosened or the pointer removed according to step 2, attempting to remove the
controller/transmitter from the sensor may bend the flapper or rotary shaft. Be careful that the back of the
controller/transmitter case or the heat insulator does not drop down and bend the rotary shaft or shaft extension.
3. Remove any insulating tape from the joint between the controller/transmitter case and the torque tube arm.
Remove the four cap screws (key 39, figure 14) that hold the controller/transmitter or heat insulator to the torque
tube arm. Pull the case straight out from the torque tube arm, easing it over the shaft coupling (key 36, figure 14) if
one is installed.
Figure 14. Heat Insulator for Fisher 249 Sensor
20A7423-C
4. If the controller/transmitter has a heat insulator, remove the four button head cap screws and washers (keys 40
and 53, figure 14) and remove the insulator assembly.
Changing Mounting Methods
WARNING
To avoid personal injury from contact with the process fluid, lower the vessel fluid level below the torque‐tube arm before
proceeding. For closed vessels, release any pressure that may be above the fluid. Also, be careful to avoid overloading a
thin‐wall torque tube with an overweight displacer.
Refer to figure 16 for key number locations.