Removing The Dlc3010 Digital Level Controller From A 249 Sensor; Standard Temperature Applications - Emerson FISHER FIELDVUE DLC3010 Instruction Manual

Instruction Manual
D102748X012
Table 6‐2. Tools Required
Tool
Hex Key
Hex Key
Hex Key
Hex Key
Hex Socket
Open‐end
Phillips Screwdriver
Small flat blade screwdriver
Strap wrench
(1)
Large flat blade screwdriver
(1)
Needle nose pliers
1. Needed to remove a flex circuit if date code numbers are requested for warranty information.

Removing the DLC3010 Digital Level Controller from a 249 Sensor

249 Sensor in Standard Temperature Applications
1. Loosen the set screw (key 31) in the terminal box cover assembly (key 6) so that the cover can be unscrewed from
the terminal box.
2. After removing the cover (key 6), note the location of field wiring connections and disconnect the field wiring from
the wiring terminals.
3. As shown in figure 2‐4, locate the access handle on the bottom of the transducer housing. Using a 2 mm hex key,
back out the set screw in the depression on the access handle until it is flush with the handle surface. Press on the
back of the handle, as shown in the figure, and slide the handle toward the front of the unit, (the locked position), to
expose the access hole. Be sure the locking handle drops into the detent.
Note
If the access handle will not slide, the sensor linkage is most likely in an extreme position. When the lever assembly is at a hard stop
inside the housing, the locking pin on the access door may not be able to engage the mating slot in the lever assembly. This
condition can occur if the displacer has been removed, if the sensor is lying on its side, or if the instrument had been coupled to the
sensor while the displacer was not connected. To correct this condition, manipulate the sensor linkage to bring the lever assembly
to within approximately 4 degrees of the neutral position before attempting to slide the handle. A probe inserted through the top
vent of the 249 head may be required to deflect the driver rod to a position where the lever assembly is free.
4. Using a 10 mm deep well socket inserted through the access hole, loosen the shaft clamp (figure 2‐4).
5. Loosen and remove the hex nuts (key 34) from the mounting studs (key 33).
6. Carefully pull the digital level controller straight off the sensor torque tube.
CAUTION
Tilting the instrument when pulling it off of the sensor torque tube can cause the torque tube shaft to bend. To prevent
damage to the torque tube shaft, ensure that the digital level controller is level when pulling it off of the sensor torque
tube.
Size
Handle
2 mm
Cover‐lock set screws
2.5 mm Small cap screws
4 mm Lever assembly mtg cap screw
5 mm Terminal box mtg cap screw
10 mm Coupling nut
13 mm Transmitter mounting nuts
Terminal screws
Electronics module mtg screws
LCD assy mtg screws
Helpful for removing a display cover that has been over‐tightened
Flex circuit mtg screws
Align/clamp ring extraction
DLC3010 Digital Level Controller
Maintenance & Troubleshooting
Usage
May 2018
Keys
31
20
13
14
7
76
34
25
36
40
3
19
17
83