Emerson FISHER FIELDVUE DLC3010, Инструкция по эксплуатации, Страница: 39 / 124

Instruction Manual
D102748X012
DLC3010 Digital Level Controller
Configuration
May 2018
39
PV alert thresholds are initialized at 100%, 95%, 5% and 0% span.
PV alert deadband is initialized to 0.5% span.
PV alerts are all disabled. Temperature alerts are enabled.
D
If Liquid Density mode was chosen, setup is complete.
D
If Interface Level or Liquid Level mode was chosen, you are advised that process fluid data must be configured. You
have the options of entering constant SG values or loading default steam tables during setup, or exiting the
procedure and manually configuring the process data later.
Note
If you are using water or weights for calibration, enter a specific gravity of 1.0 SGU. For other test fluids, enter the specific gravity
of the fluid used.
Detailed configuration of the process fluid and temperature compensation is provided in Configure > Manual Setup >
Process Conditions > Fluid(s).
Coupling
If the digital level controller is not already coupled to the sensor, perform the following procedure to couple the digital
level controller to the sensor.
1. Slide the access handle to the locked position to expose the access hole. Press on the back of the handle as shown in
figure 2‐4 then slide the handle toward the front of the unit. Be sure the locking handle drops into the detent.
2. Set the displacer to the lowest possible process condition, (i.e. lowest water level or minimum specific gravity) or
replace the displacer by the heaviest calibration weight.
Note
Interface or density applications with displacer/torque tube sized for a small total change in specific gravity are designed to be
operated with the displacer always submerged. In these applications, the torque rod is sometimes resting on a stop while the
displacer is dry. The torque tube does not begin to move until a considerable amount of liquid has covered the displacer. In this
case, couple with the displacer submerged in the fluid with the lowest density and the highest process temperature condition, or
with an equivalent condition simulated by the calculated weights.
If the sizing of the sensor results in a proportional band greater than 100% (total expected rotational span greater than 4.4
degrees), couple the transmitter to the pilot shaft while at the 50% process condition to make maximum use of available
transmitter travel (
$
6
_
). The Capture Zero procedure is still performed at the zero buoyancy (or zero differential buoyancy)
condition.
3. 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 N
S
m (18 lbf
S
in).
4. Slide the access handle to the unlocked position. (Press on the back of the handle as shown in figure 2‐4 then slide
the handle toward the rear of the unit.) Be sure the locking handle drops into the detent.