Product Positioning

• Product Series: DLC3000 series digital level controllers—microprocessor-based instruments for level, interface, and density measurement with communication capabilities.

• Design Objective: Direct replacement for standard pneumatic and electronic level transmitters.

Core Functions

Function	Details
Measured Parameters	Level, interface, and density; supports process temperature measurement for temperature compensation
Communication Protocol	HART protocol (1200 baud FSK); supports field or remote data access through a Type 275 HART communicator or AMS ValveLink software
Signal Input	Rotational movement of the torque-tube shaft caused by changes in displacer buoyancy (level/interface/density signal); 2- or 3-wire 100-ohm platinum RTD interface (temperature signal)
Signal Output	- Analog: 4~20mA DC, selectable direct or reverse action; high saturation: 20.5mA; low saturation: 3.8mA; high alarm: 22.5mA; low alarm: 3.7mA (only one alarm is active; high alarm complies with Namur NE 43) - Digital: HART protocol signal
Operating Modes	Point-to-point mode (analog and digital signals transmitted simultaneously); multidrop mode (fixed 4mA analog output with digital communication only)

Hardware Compatibility

• Compatible Sensors: Can be installed on Fisher 249 series level sensors with or without an external displacer.

Key Technical Specifications

Specification	Details
HART Impedance Requirements	Total shunt impedance, excluding the host device and transmitter: 230~1100 ohms; transmitter receiving impedance: Rx=42K ohms, Cx=14nF
Temperature Compensation	Supports compensation for specific gravity changes through RTD measurement or user-entered target temperature

Product Features

• Convenient Information Access: Supports local or remote access to process, instrument, and sensor information at the junction box.

• Flexible Operation: Supports active Burst mode for periodic transmission of digital information.