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Dwyer-Smart level transmitter-TRUE

( Dwyer )

General

The True Level III smart level transmitter calibrates itself.

Accurately measure the level of any liquid or slurry, independent of changes in density, electrical properties, viscosity, and other process variables. The True Level III transmitter is a smart level system that measures the material's composition. It then corrects the level reading for any changes in the material's electrical or physical properties. Use the True Level III transmitter in non-dedicated vessels, "slop tanks", reactor vessels, and for unstable materials like ammonia and liquefied gasses.

Remote Configuration

Configure the True Level III transmitter from the convenience and comfort of the control room... or

anywhere along the two-wire loop.

Quick and Easy Configuration

Use your existing Rosemount 275 hand held communicator or Drexelbrook’s PC software to configure the transmitter, now with a HART® Device Description for easy setup.

Tamper Proof

No adjustments on the transmitter; prevents unauthorized “tweaking” or inadvertent changes in calibration.

Unsurpassed Accuracy

No other RF transmitter matches the accuracy, stability, and repeatability of the True Level III transmitter. This means smoother operation and less downtime.

Compatibility with the Future

True Level III transmitter uses standard HART protocol. Over 70 instrument manufacturers supply HART protocol for over a half million field instruments to process plants all over the world. The True Level III transmitter is also compatible with Allen Bradley PLCs through their Smart Transmitter Interface products.

One Transmitter Measures All Liquids

The True Level III smart RF/Admittance level transmitter, with its special compensation sensor and circuitry, measures all homogeneous liquids and slurries accurately, independent of changes in density, viscosity, electrical properties, and other process variables.

No Calibration Required... Ever

The True Level III transmitter is self-calibrating. There is no need to know the level in the tank.Use it for easy and accurate measurement of the following:

•undedicated tanks

•liquids with volume changes due to temperature

•batch reactors

•mixing tanks.

Smart Advantages

Major advantages of the True Level III transmitter

include:

• Two-wire - Intrinsically Safe

• Built in tank strapping

• Choice of output in level, weight or volume

• Built-in self diagnostics

• Works with liquefied gasses

• Choice of digital or 4-20 mA transmission

 


Features:

Output

4-20 mA, HART® protocol

Supply Voltage

12-30 Vdc

Supply Voltage Error

± 0.2% maximum of full scale for 39.2 volt change

Accuracy

± 1% of span (nominal)

 


Ambient Temperature Limits

-40˚F to 170˚F (-40˚C to 77˚C)

Output Isolation

4000 volt minimum signal wire to sensor

Response Time

Less than 2 seconds with no damping time 1-90 seconds programmable damping time

Allowable Static Discharge to Sensor

10 amps maximum

Sensing Element Connection

(sensor-dependent) 11⁄2-inch NPT (standard) Flange mounting (optional)

Calibration

PC-based software, or Model 275 Calibrator

Electronic Housing

Meets NEMA 1-5 and 12 including NEMA 4X. Suitable for Class I, Groups A, B, C, D; Class II, Groups E, F & G; Class III; Div. 1 & 2. The housing is suitable for Explosion Proof installations in Div. 1 hazardous locations when the electronics are powered from an approved source. Refer to system Control Drawings for proper and safe installation and wiring.

Area Classifications

Cables and Sensors are intrinsically safe for all Groups, Division 1 & 2 when the electronics are powered from an approved source. The electronics are intrinsically safe for Groups C, D, E, F & G, Division 1 when powered from an approved source. The system (electronic unit, cable and sensor) is FM Approved, non-incendive, and nonsparking and suitable for all Groups, Div. 2 without intrinsic safety barriers.

Maximum Cable Length

25 feet (7 m) (remote mount only)