Fisher DLC3010 Digital Level Controller

Fisher DLC3010 Digital Level Controller

Fisher DLC3010 Digital Level Controller

The FIELDVUE DLC3010 digital level controller is used with level sensors to measure liquid level, the level of the interface between two liquids, or liquid specific gravity (density). Changes in level or specific gravity exert a buoyant force on a displacer, which rotates a torque tube shaft. The digital level controller converts this rotational motion to an electronic signal.


The DLC3010 is a communicating,microprocessor-based instrument that can be configured to sense the level, interface level, or density of liquids. In addition to the normal function of providing a 4 to 20 milliampere current signal, the DLC3010, using HART® communications protocol,gives easy access to information critical to process operation. You can obtain information about the process, instrument, or sensor using an Emerson Field Communicator. The DLC3010 can be used in analog or HART digital signaling mode with the Emerson Automation Solutions DeltaV™ system.

The connection for HART communication may be made at any point in the field wiring that meets the HART impedance requirements. Configuration,
calibration, diagnostics, parameter review, signal monitoring and alert monitoring are all available through the HART protocol. Information from the field
can be integrated into control systems or be received on a single loop basis. The DLC3010 digital level controller is designed to directly replace standard pneumatic and electronic level transmitters. It mounts on a wide variety of Fisher 249 caged and cageless level sensors.

Fisher DLC3010 Digital Level Controller

Available Configurations
DLC3010 Digital Level Controller:Mounts on caged and cageless 249 sensors. See tables 4 and 5 and sensor description.
Function: Transmitter
Communications Protocol: HART

Input Signal
Level, Interface, or Density: Rotary motion of torque tube shaft proportional to changes in liquid level,interface level, or density that change the buoyancy of a displacer.
Process Temperature: Interface for 2- or 3-wire 100 ohm platinum RTD for sensing process temperature, or optional user-entered target temperature to permit compensating for changes in specific gravity

Fisher DLC3010 Digital Level Controller
Output Signal
Analog: 4 to 20 milliamperes DC ( direct action—increasing level, interface, or density increases output; or  reverse action—increasing level, interface, or density decreases output)
High saturation: 20.5 mA
Low saturation: 3.8 mA
High alarm: 22.5 mA
Low Alarm: 3.7 mA
Only one of the above high/low alarm definitions is available in a given configuration. NAMUR NE 43 compliant when high alarm level is selected.
Digital: HART 1200 Baud FSK (frequency shift keyed)
HART impedance requirements must be met to enable communication. Total shunt impedance across the master device connections (excluding the
master and transmitter impedance) must be between 230 and 600 ohms. The transmitter HART receive impedance is defined as:
Rx: 42K ohms and
Cx: 14 nF
In point-to-point configuration, analog and digital signalling are available. The instrument may be queried digitally for information, or placed in Burst
mode to regularly transmit unsolicited process information digitally. In multi-drop mode, the output current is fixed at 4 mA, and only digital communication is available.
Fisher DLC3010 Digital Level Controller