Note
Neither Emerson, Emerson Process Management, nor any of their affiliated entities assumes responsibility for the selection, use, and maintenance of any product. Responsibility for the selection, use, and maintenance of any product remains with the purchaser and end-user.

Available Configurations

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

Input Signal(1)

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

Output Signal(1)

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 1100 ohms. The transmitter HART receive impedance is defined as:
Rx: 42K ohms and
Cx: 14 nF
Note that 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.

Performance

Operating Influences

Power Supply Effect: Output changes <±0.2% of full scale when supply varies between min. and max voltage specifications.
Transient Voltage Protection: The loop terminals are protected by a transient voltage suppressor. The specifications are as follows:

Supply Requirements (See figure 5)

12 to 30 volts dc; instrument has reverse polarity protection.
A minimum compliance voltage of 17.75 is required to guarantee HART communication.

Compensation

Transducer compensation: for ambient temperature.
Density parameter compensation: for process temperature (requires user-supplied tables).
Manual compensation: for torque tube rate at target process temperature is possible.

Digital Monitors

Linked to jumper-selected Hi (factory default) or Lo analog alarm signal:
Torque tube position transducer: Drive monitor and signal reasonableness monitor
User-configurable alarms: Hi-Hi and Lo-Lo Limit process alarms
HART-readable only:
RTD signal reasonableness monitor: When RTD installed
Processor free-time monitor.
Writes-remaining in Non Volatile Memory monitor.
User-configurable alarms: Hi and Lo limit process alarms, Hi and Lo limit process temperature alarms, and Hi and Lo limit electronics temperature alarms

Diagnostics

Output loop current diagnostic.
LCD meter diagnostic.
Spot specific gravity measurement in level mode: used to update specific gravity parameter to improve process measurement
Digital signal-tracing capability: by review of "troubleshooting variables", and
Basic trending capability for PV, TV and SV.

LCD Meter Indications

LCD meter indicates analog output on a percent scale bar graph. The meter also can be configured to display:
Process variable in engineering units only.
Percent range only.
Percent range alternating with process variable or
Process variable, alternating with process temperature (and degrees of pilot shaft rotation).

Electrical Classification

Hazardous Area:

Explosion proof, Intrinsic Safety,
Dust-Ignition proof

Explosion proof, Non-incendive,
Dust-Ignition proof, Intrinsic Safety

Intrinsic Safety, Type n, Flameproof

Intrinsic Safety, Type n

Flameproof
Refer to tables 8, 9, 10, 11, and 12 for additional approval information.
Electrical Housing: NEMA 4X, CSA Enclosure, and IP66

Minimum Differential Specific Gravity

With a nominal 4.4 degrees torque tube shaft rotation for a 0 to 100 percent change in liquid level (specific gravity=1), the digital level controller can be adjusted to provide full output for an input range of 5% of nominal input span. This equates to a minimum differential specific gravity of 0.05 with standard volume displacers.
See 249 Series sensor specifications for standard displacer volumes and standard wall torque tubes. Standard volume for 249C and 249CP series is ~980 cm3 (60 in3), most others have standard volume of ~1640 cm3 (100 in3).
Operating at 5% proportional band will degrade accuracy by a factor of 20. Using a thin wall torque tube, or doubling the displacer volume will each roughly double the effective proportional band. When proportional band of the system drops below 50%, changing displacer or torque tube should be considered if high accuracy is a requirement.

Mounting Positions

Digital level controllers can be mounted right- or left-of-displacer, as shown in figure 9.
Instrument orientation is normally with the coupling access door at the bottom, to provide proper drainage of lever chamber and terminal compartment, and to limit gravitational effect on the lever assembly. If alternate drainage is provided by user, and a small performance loss is acceptable, the instrument could be mounted in 90 degree rotational increments around the pilot shaft axis. The LCD meter may be rotated in 90 degree increments to accommodate this.

Construction Materials

DLC3000 Series Digital Level Controller:
Case and Cover: Low-copper aluminum alloy
Internal: Plated steel, aluminum, and stainless steel; encapsulated printed wiring boards; Neodymium Iron Boron Magnets

Electrical Connections

Two 1/2-14 NPT female conduit connections; one on bottom and one on back of terminal box. M20 adapters available.

Options

■Heat insulator. See description under Ordering Information. ■Mountings for Masoneilan®, Yamatake and Foxboro®/Eckhardt displacers available. ■Level Signature Series Test (Performance Validation Report) available (EMA only) for instruments factory-mounted on 249 sensor. ■Factory Calibration: available for instruments factory-mounted on 249 sensor, when application, process temperature and density(s) are supplied. ■Device is compatible with user-specified remote indicator.

Operating Limits

Process Temperature: See table 3 and figure 6.
Ambient Temperature and Humidity: See below

Weight

Less than 2.7 Kg (6 lbs)

• 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.

Through the use of an electronic Setup Wizard, digital level controller start-up is straightforward and fast. Level and temperature alarms, specific gravity tables, calibration trim and trending are readily configurable. DLC3000 Series digital level controllers also support re-ranging without a fluid reference.

• Responsive to Small Process Changes—Accurate, high-gain analog-to-digital conversion enables measurement of small changes in the process variable. This allows DLC3000 Series digital level controllers 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.
• 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. (An sample water/steam table is provided in the FIELDVUE DLC3000 Series Digital Level Controls instruction manual, Form 5631). The measured torque tube rate may be manually pre-compensated for a target process temperature using the data available in the DLC3000 Device Description (DD).
• 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.
• 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.
• 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 2) 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.
• Alarm Jumper—DLC3000 Series digital level controllers include 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.

Input Signal

Liquid Level or Liquid-to-Liquid Interface Level:From 0 to 100 percent of displacer length
Liquid Density: From 0 to 100 percent of displacement force change obtained with given displacer volume—standard volumes are ■980 cm3 (60 inches3) for Types 249C and 249CP sensors or ■1640 cm3 (100 inches3) for most other sensors; other volumes available depending upon sensor construction

Sensor Displacer Lengths

See tables 4 and 5 footnotes

Sensor Working Pressures

Consistent with applicable ASME pressure/temperature ratings for the specific sensor constructions shown in tables 4 and 5

Caged Sensor Connection Styles

Cages can be furnished in a variety of end connection styles to facilitate mounting on vessels; the equalizing connection styles are numbered and are shown in figure 8.

Mounting Positions

Most level sensors with cage displacers have a rotatable head. The head may be rotated through 360 degrees to any of eight different positions, as shown in figure 9.

Construction Materials

See tables 2, 4, and 5

Operative Ambient Temperature

See table 3.
For ambient temperature ranges, guidelines, and use of optional heat insulator, see figure 6.

Options

■Heat insulator, see description under Ordering Information ■Gauge glass for pressures to 29 bar at 232°C (420 psig at 450°F), and ■Reflex gauges for high temperature and pressure applications

• Process temperature and pressure and ambient air temperature
• Application
• Liquid level service (specific gravity)
• Interface level service (specific gravity of both liquids and minimum differential gap or span required)
• Density service (minimum and maximum specific gravity required)

Construction

Refer to the specifications tables. Review the descriptions below each specification and in the referenced tables and figures; specify the desired choice whenever there is a selection to be made.

Heat Insulator

Type DLC3010 Digital Level Controller

If the Type DLC3010 digital level controller and the 249 Series sensor are ordered as an assembly, and a heat insulator is required for the application, order the heat insulator as a 249 Series sensor option. If the Type DLC3010 digital level controller is ordered separately, the heat insulator is available as a kit. Order part number 28B5741X012 for the heat insulator kit.

Note
Neither Emerson, Emerson Process Management, nor any of their affiliated entities assumes responsibility for the selection, use, and maintenance of any product. Responsibility for the selection, use, and maintenance of any product remains with the purchaser and end-user.