8920 Loop Powered Transmitt

8920 Loop Powered Transmitt

8920 Loop Powered Transmitter (LPT) – View accurate level and temperature data at the tank side and
transmit it to the control room

  • Overview
  • Specifications
  • Options
  • Resources
  • Related Products

Highlights

  • Digital display with capacitive touch control interface provides
    inventory information at the tank side and configuration of the
    transmitter for all connected devices
  • Easy in-service installation – mounts directly to most mechanical
    tank gauges, including Varec, L&J, and GSI
  • Industry Standard Protocols- MODBUS, GPU Bi-Phase Mark,
    Mark/Space, and L&J Tankway
  • Integrate ancillary equipment and sensors-supports up to 4 HART
    devices and provides an on-board 3-wire RTD temperature input
    Activate alarms or relays with; 2 discrete inputs (as standard), 4
    discrete inputs and 4 contact outputs(as option) or 2-4 SPDT cam-operated switches (as option)
  • Approved for hazardous areas: cFMus, ATEX, IECEx, RoHS

 

Applications

For use in inventory management applications, the 8920 Loop Powered Transmitter (LPT) is a precision transmitter designed to relay level or level & temperature information via field communications to the control room. Changes in liquid level and tank temperature are output to a 4-20 mA signal, or via HART (pending). The 20-to-48 DC voltage required for operation may be supplied by the user or through an optional 85-to-305 VAC on-board power supply. Two or four cam-operated switches that can be utilized for indication of alarms or relays are also available as an option.

 

 

On Your Tank

The 8920 LPT is easy to install. It mounts directly to most mechanical tank gauges, (Varec, GSI, L&J, Sakura) and integrates into existing tank gauging communication loops (MODBUS®, Biphase Mark, Mark/ Space and Tankway).

 

 

Complete Tank Gauging System

The 8920 LPT integrates ancillary equipment, and sensors, and provides the first steps to automation and control. It supports up to 4 HART devices and provides an on‐board 3‐wire RTD temperature input. It can activate alarms or relays using analog and digital inputs/outputs, SPDT cam-operated outputs and software-driven contact outputs.

 

 

Training and Support

The 8920 LPT is available to ship today. Every transmitter is supplied with detailed user instructions, but sometimes you need to see how it’s done. That’s why we also have a YouTube channel with basic how-to-videos. If you need direct support, we offer standard training and service programs that we tailor to your staff, and your facility.

 

Accuracy & Repeatability

± 1/16″ (1.58 mm)

Range

0 to 120 ft; Meters: 0 to 36 m
Limit switch range is 100 ft (30 M) maximum

Communications

Mark/Space
EIA‐485/GSI Type MODBUS®
Biphase Mark
L&J Tankway

Power

Standard: 20 to 65 VDC 0.05A
Optional: 40 to 65 / 110 / 220 – 240 VAC
750 mW nominal, 50/60 Hz
Built-in galvanic isolation for both AC and DC models

Temperature Input

High‐accuracy 20‐bit analog‐to‐digital converter. 3‐wire RTD Copper (CU90, CU100) or Platinum (PT100).

Discrete Inputs

Enables connection to ancillary devices, such as switches, pumps or valves
Standard: (DC Unit) Option: Two (2) discrete inputs.
Optional: (AC Unit): 4 discrete inputs
Host signal: Open/Closed

Contact Outputs

Triggers temperature or level alarm lights, horns, etc.
Optional (AC Unit): Four (4) software‐driven contact outputs
Host signal: Open/Closed
Ratings:
0.6 A @ 125 Vac
1 A @ 30 Vdc
0.6 A @ 110 Vdc

I/O

Analog Input (x1) 4 to 20 mA
Analog Output (x2) 3.5 to 22 mA

HART

HART master for ancillary devices
Typically 4 max, depending on current consumption

Limit Switches

11 amp ‐ 125, 250, 277 VAC
4 amp ‐ 125 VAC Tungsten filament Lamp
Load: 1/3 HP ‐ 125 VAC, 250 VDC
Load: 1/2 amp ‐ 125 VDC, 1/4 amp ‐ 250 VDC

Approvals

cFMus (USA & Canada) ‐ Explosion proof: Class I, Division 1, Groups C&D T5 ‐25 °C ≤ Ta ≤ +85 °C
Flameproof, Class I, Zone 1, AEx/Ex d IIB T5 ‐20 °C ≤ Ta ≤ +85 °C
ATEX/IECEx (International) – Flameproof, Class I, Zone 1, Ex II 2G, Ex d IIB T5 Gb ‐20 °C ≤ Ta ≤ +85 °C

For complete technical specifications, download the technical document or product manual.

01 Approvals
  • cFMus
  • ATEX/IECEx
02 Power Input
  • DC
  • AC
03 Communications
  • EIA-485 MODBUS/GSI Type MODBUS®
  • Biphase Mark
  • Mark/Space
  • Tankway (L&J)
04 Limit Switches
  • None
  • Two (2) SPDT Limit Switches (180° adjustable dwell, positive activation)
  • Four (4) SPDT Limit Switches (180° adjustable dwell, positive activation)
05 Limit Switch Range
  • Not Applicable
  • 0-25 ft
  • 0-50 ft
  • 0-100 ft
  • 0-7.5 m
  • 0-15 m
  • 0-30 m
06 Digital I/O
  • None
  • 2 Digital Inputs
  • 4 Digital Inputs + 4 Dry Contact Outputs
07 Analog I/O
  • None
  • Analog Input (4-20 mA)
  • Analog Output (4-20 mA)
  • Analog Input & Outputs (4-20mA)
08 HART
  • None
  • HART Master
09 Display Orientation
  • Forward Facing
  • Backward Facing
  • Side Facing

Video

2920 FTT Example Parameter Configuration Analog Output
Example demonstration of using Varec's 2920 FTT touch display to configure the Analog Output parameter.
2920 FTT Example Parameter Configuration Critical Low Level
Example demonstration of using Varec's 2920 FTT touch display to configure the Critical Low Level parameter
2920 FTT Example Parameter Configuration HART Master
Example demonstration of using Varec's 2920 FTT touch display to configure the HART Master parameter.
2920 FTT Example Parameter Configuration Tank Shape for RTGs
Example demonstration of using Varec's 2920 FTT touch display to configure the Tank Shape parameter for radar tank gauges.
2920 Float and Tape Transmitter Interface Display Overview
The first of a series of videos that demonstrates Varec's 2920 FTT touch display and configuration interface. View more here.

Datasheet

2920 Float and Tape Transmitter Overview
The 2920 Float & Tape Transmitter (FTT) provides data from the tank side to the control room for use in...

Manuals

2920 Float and Tape Transmitter Installation and Operation Manual
Designed to assist the user in the installation, operation, maintenance, and troubleshooting of the 2920 Float and Tape Transmitter.

Parts and Accessories

2920 Float and Tape Transmitter Spare Parts List
Parts list for the 2920 Float and Tape Transmitter.

Technical Specifications

2920 Float and Tape Transmitter Technical Specifications
Technical specifications of the 2920 Float and Tape Transmitter.

Certificates

ATEX Approval 2500 6000x 4560 2910 2920 8200 8240
QUALITY ASSURANCE NOTIFICATION No. FM19ATEXQ0143 in accordance with the ATEX directive 2014/34/EU, ‘Equipment and protective systems for use in potentially explosive atmospheres’
IECEx Approval 2910 2920 8200
IECEx Certificate of Conformity INTERNATIONAL ELECTROTECHNICAL COMMISSION IEC Certification Scheme for Explosive Atmospheres

Case Study

Integrating N2920 Float and Tape Transmitter for Higher Accuracy
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White Paper

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