Instruction Manual

Instruction Manual
D103434X012
Installation
November 2014
12
Protecting the Coupling and Flexures
CAUTION
Damage to flexures and other parts can cause measurement errors. Observe the following steps before moving the sensor
and controller.
Lever Lock
The lever lock is built in to the coupling access handle. When the handle is open, it positions the lever in the neutral
travel position for coupling. In some cases, this function is used to protect the lever assembly from violent motion
during shipment.
A DLC3020f digital level controller will have one of the following mechanical configurations when received:
1. A fully assembled and coupled caged‐displacer system shipped with the displacer or driver rod blocked within the
operating range by mechanical means. In this case, the access handle (figure 2‐2) will be in the unlocked position.
Remove the displacer blocking hardware before calibration. (See the appropriate sensor instruction manual). The
coupling should be intact.
CAUTION
When shipping an instrument mounted on a sensor, if the lever assembly is coupled to the linkage, and the linkage is
constrained by the displacer blocks, use of the lever lock may result in damage to bellows joints or flexure.
2. If the displacer cannot be blocked because of cage configuration or other concerns, the transmitter is uncoupled
from the torque tube by loosening the coupling nut, and the access handle will be in the locked position. Before
placing such a configuration into service, couple the instrument to the sensor as follows:
To couple the instrument to the sensor:
a. Slide the access handle to the open position to lock the lever assembly in place and expose the access hole. Press
on the back of the handle as shown in figure 2‐2 then slide the handle toward the front of the unit. Be sure the
locking handle drops into the detent.
b. If in process, ensure that the level or interface is in the lowest position on the displacer.
If on the bench, ensure that the displacer is dry and the displacer rod lever arm is not hitting a travel stop.
c. Insert a 10 mm deep well socket through the access hole and onto the torque tube shaft clamp nut. Tighten the
clamp nut to a maximum torque of 2.1 NSm(18 lbfSin).
d. Slide the access handle to the closed position. for operation or calibration (Press on the back of the handle as
shown in figure 2‐2 then slide the handle toward the rear of the unit.) Be sure the locking handle drops into the
detent.