Emerson Fisher 2502, Инструкция по эксплуатации

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Instruction Manual
D200126X012
2502 Controllers
June 2017
25
CAUTION
If the hex nut has not been loosened according to step 2, attempting to remove the controller from the sensor may bend
the rotary shaft or operating arm and linkage. Be careful that the back of the controller 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 case and the torque tube arm. Remove the four
cap screws (key 39, figure 12) that hold the controller 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 12) if one is installed.
Figure 12. Heat Insulator Shown Installed on Fisher 249 Sensor
20A7423-C
4. If the controller has a heat insulator, remove the button head cap screws (key 40). Remove four washers (key 53)
and the insulator assembly (key 35).
Changing Mounting Method
WARNING
To avoid personal injury from contact with the process liquid, lower the vessel level below the torque‐tube arm before
proceeding. For closed vessels, release any pressure that may be above the liquid. Also, be careful to avoid overloading a
thin‐wall torque tube and/or oversized displacer.
Refer to figure 14 for key number locations.