• Installation Versatility— With the integration of a wafer-style liquid level sensor and transmitter into one product, the DL3 enables users to install digital level transmitters to a variety of industry standard or custom process vessel connections. Installing the DL3 in a customer-supplied external cage gives process equipment designers freedom to select the best process vessel connection location and configuration to meet specific application requirements.
• HART / AMS Compliant— The DL3 uses the HART protocol to interface to the 275 HART Communicator, or 375 Field Communicator for field operations interface. Advanced user-interface capabilities are enabled by AMS® Suite: Intelligent Device Manager (see figure 3), including database management, remote calibration, comprehensive views of configuration, alarm, status, compensation tables, and troubleshooting parameters, as well as retaining access to the diagnostic procedures via pull-down menus.
• Increased Accuracy— When a process temperature is input via HART protocol, the DL3 can automatically compensate for any specific gravity changes of the process fluid caused by temperature variability.
• NACE Compliant— The materials used in the DL3 wafer-style sensor (see table 2) meet the metallurgical requirements of NACE MR0175 2002. Environmental limits may apply.
• Corrosion Protection— Acrylic enamel-based paint and encapsulated electronics in the transmitter provide protection and reliability in hostile environments.
• Ease of Calibration / Configuration— The DL3 comes factory-calibrated for SG = 1.00 and 21°C (70°F). The Setup Wizard enables a straight forward and fast reconfiguration to the user's application. Changing the SG of the liquid, switching to interface or density mode, or re-ranging the output can all be accomplished by simple data entry.
• Modular Design—The stab-in design of the field terminal box allows the easy removal of the instrument for repair or maintenance, without disconnecting field wiring. The modular design of the transducer assembly and the encapsulated electronics board, the separate LCD assembly, and the terminal box, add ease to any maintenance required by the instrument. See figure 2. The terminal box and LCD assembly are passive so re-calibration is not required when they are replaced.

• Size—NPS 3 or 4 raised-face flange wafer-style sensor suitable for CL150 through 600 flange rating
• Material— Steel or stainless steel

Notes
All DL3 digital level transmitters are factory calibrated for: SG = 1.00 and 21°C (70°F).

Right-hand mounting is standard, and can be field configured to left-hand mounting as required by installation.

During shipment, displacers are detached from the sensors.

Equalizing piping, stillwells, or other equipment may be required for installation. Emerson Process Management does not provide this equipment.

Instruction manuals used with the DL3 digital level transmitter are: FIELDVUE ® DLC3000 Digital Level Controllers (D102748X012) and 249W Cageless Wafer Style Level Sensor (D102803X012).

Note
A cage is not supplied with the DL3 . For a factory built cage-style construction, contact your Emerson Process Management sales office.

Figure 6 provides guidelines for fabricating a cage.
When fabricating a cage or chamber, maintain at least a minimum clearance of 10 mm (3/8-inch) between the diameter of the displacer and the inside diameter of the cage or displacer. Dirty or viscous fluids may require a larger clearance. Provide sufficient cage length below the displacer to ensure that the displacer does not hit the bottom of the cage. When installing the cage, it must be vertically plumb so that the displacer does not strike the side of the cage. See figure 7 for overall envelope dimensions for mounting a DL3.

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

Available Configurations

Transmitter: DLC3000 digital level controller
Wafer-Style Sensor: 249W
Matches NPS 3 or 4 raised-face flange, suitable for CL150 through 600 flange rating
Displacer length: 356 mm (14-inch)

Allowable Specific Gravity

Liquid Level: 0.4 to 1.2
Interface Level or Density: 0.08 minimum differential

Output Signal

Analog: 4-20 mA 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(1) 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. For purposes of determining the allowable wiring capacitance, the HART "receive impedance" of the transmitter:
At control frequencies may be modeled as—
Rx: 42K ohms and Cx: 14 nF
In the HART normal frequency band of 950 -2500 Hz and above— Rx: 21K ohms and Cx: 12 nF is a better fit
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

Independent Linearity NPS 3 sensor: ±0.8% of output span
NPS 4 sensor: ±0.5% of output span
Hysteresis plus Dead band: <1.0% of output span
Repeatability NPS 3 sensor: ±0.5% of output span
NPS 4 sensor: ±0.3% of output span
At effective proportional band (PB) <100%, linearity, dead band, and repeatability are derated by the factor (100%/PB)

Sensor Working Pressures(2)

CL600 maximum

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 8)

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.

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:
Processor free-time monitor.
Writes-remaining in Non Volatile Memory monitor.
User-configurable alarms: Hi and Lo limit process 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, (and degrees of pilot shaft rotation).

Electrical Classification

Hazardous Area:

Intrinsic Safety, Explosion proof,
Dust-Ignition proof

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

Intrinsic Safety, Flameproof, Type n

Intrinsic Safety, Type n

Flameproof

Intrinsic Safety, Flameproof,
Dust-Ignition proof
Refer to tables 3, 4, 5, 6, 7, and 8 for additional approvals information.
Electrical Housing: Designed to meet NEMA 4X, IEC 60529 IP66

Construction Materials

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

Sensor: See table 2

Mounting Positions

Mounts on top of vessel or on customer supplied cage (see figure 5), can be field-mounted right- or left-of-displacer.

Electrical Connections

Two 1/2-14 NPT internal conduit connections; one on bottom and one on back of terminal box.

Operating Limits

Allowable Process Temperatures(2) .
Maximum: 232°C (450°F). See figure 9.
Ambient Temperature and Humidity