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Dwyer-RF Admittance Level Transmitter-Lrf

( Dwyer )

General

The RCT RF smart level transmitter provides remote calibration without having to empty and fill the vessel.

Configuration Without Changing Level

• Use your existing HART® 275 handheld communicator or Drexelbrook's PC software to configure the transmitter.

• Use an optional low cost Display/ / Keypad for local indication. Calibration and configuration without costly handheld communication terminals or expensive PC based systems.

Eliminate Routine Maintenance

• No moving parts to break or wear out

• No need for routine maintenance or re calibration

Compliant with System Validation

• PC based software allows full documentation for validation requirement.

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 RCT RF. This translates into smoother operation and less downtime.

Compatibility with the Future

The standard HART protocol is a proven instrumentation protocol. Over a half million field instruments have been supplied by over 70 instrument manufacturers to process plants all over the world. The RCT RF is also compatible with Allen Bradley PLCs through their Smart Transmitter Interface products.

One Transmitter for All Applications

With RF Admittance technology, one transmitter handles all your applications (Liquids, granulars,

slurries, interfaces; cryogenic to 500ºF, full vacuum to 10,000 PSI) Easiest Calibration Ever - Local or Remote Configure this transmitter from anywhere along the two-wire loop without changing the level in the

vessel. Or... calibrate via local display / keypad without the need for handheld communicators.

Smart Advantages Major advantages of the RCT RF:

• Ignores coatings on the sensing element

• Built in tank strapping

• Choice of output in level, flow, weight or volume

• Factory pre calibration

• Choice of digital or 4-20 mA transmission

• Built-in self diagnostics

 


Features:

Upper Range Limit (URL)

40,000 pF, approximately 650 feet (200m) for full scale, sensor dependent

Recommended min. span

1 pF, approximately .25” (6mm) of a conductive fluid and 1.5” (35mm) of an insulating fluid.

Accuracy

0.25 % of range

Combined temperature effect per 50˚F (10˚C)

1% of range

Output (two wire)

4 to 20 mA HART® protocol3

Supply Voltage

17 to 30 Vdc

Supply Voltage Effect

± 0.2% of output at maximum span from 12 to 30 vdc

Step Response

Less than 1 second to 90% of final value when damping = 0 sec.

Damping Time Constant

0 to 90 seconds, 1 second steps

Spark Protection (4 to 20 output)

10 Amperes

Spark Protection (Sensor

10 Amperes (Center Wire to Shield or Shield to ground)

Load Resistance

750 Ohms @ 24 Vdc