Data Sheet

DLC3010 Digital Level Controller
D102727X012
Product Bulletin
11.2:DLC3010
August 2014
7
Features
n Simplified Setup and Calibration—For quick analog
transmitter replacement (4-20mA out only), the
instrument may be configured with default sensor
data, zero Level Offset, differential process SG, and
zero/span procedure only. For full compensation
and diagnostic capabilities, complete sensor data
entry and calibration is recommended.
Using Guided Setup, digital level controller start-up
is straightforward and fast. Level and temperature
alarms, specific gravity tables, calibration trim and
trending are readily configurable. The DLC3010 also
supports re-ranging without a fluid reference.
n Responsive to Small Process Changes—Accurate,
high-gain analog-to-digital conversion enables
measurement of small changes in the process
variable. This allows the DLC3010 to be used in
difficult liquid level, interface, or density
applications. In addition, an adjustable input filter
and output damping help to attenuate
displacer-induced ripple in the output signal due to
liquid turbulence.
n Reduced Temperature Effects—An internal
temperature sensor enables consistent
performance of the digital level controller despite
ambient temperature changes. With a temperature
input signal, either via HART protocol or an RTD
connected to the instrument, the digital level
controller can also automatically compensate for
specific gravity changes due to temperature. A
user-supplied table of up to ten linear segments
may be entered to implement this feature. (A
sample water/steam table is provided in the
DLC3010 instruction manual (D102748X012). The
measured torque tube rate may be manually
pre-compensated for a target process temperature
using the data available in the DLC3010 Device
Description (DD).
n Additional Compensation—The instrument
measurement algorithm corrects for the small
motion of the displacer as buoyancy changes,
allowing it to calculate the true cage or vessel level.
This provides additional accuracy on the shorter
displacers.
n Rugged Construction—Mechanical safeguards
designed into the digital level controller help it to
withstand physical abuse often incurred during
installation or in transport, without compromising
performance. The fully encapsulated printed wiring
boards resist the effects of vibration, temperature,
and corrosive atmospheres. The lever assembly is
pinned at the neutral position when the coupling
access door is open, providing shipping stabilization
for a separate transmitter purchase. Locking set
screws are provided for covers and the access door
handle.
n Easy Maintenance—Field wiring connections are in a
compartment separated from the electronics. This
protects the electronics from any moisture brought
into the housing by the field wiring. This also eases
installation and maintenance. The digital level
controller does not have to be removed to facilitate
troubleshooting or service. Modular construction
(figure 4) allows servicing in the field. However, if it
is necessary to remove the digital level controller for
in-shop maintenance and calibration, field wiring
does not need to be disconnected.
n Alarm Jumper—The DLC3010 digital level controller
includes self-diagnostics that detect an error (e.g.
electronics failure) that would render the process
variable measurement inaccurate. The instrument
can also be configured to indicate a process variable
high or low alarm. When a process variable alarm or
an error is detected the analog output signal is
driven either above or below the normal 4 to 20 mA
range, depending on the user-selectable position of
the alarm jumper. The unit ships from the factory
with the jumper in the high position.