ΔP TRANSDUCER MANUAL   Download

ΔP TRANSDUCER MANUAL

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Liquid Controls

Differential Pressure (ΔP) Transducer

The differential pressure transducer monitors the differential pressure (pressure drop) between a point immediately upstream and a point immediately downstream of the full flow fuel monitor or water coalescer.   This system is designed specifically for application on Jet Fuel delivery vehicles, hydrant carts and stationary systems, and is currently available for use with the Liquid Controls LCR600 and MASTERLOAD III™ Electronic Registers. 

 


dP Transducer

 

∆P Transducer Features

The differential pressure (∆P) transducer is designed specifically for aviation fueling applications on jet fuel delivery vehicles, hydrant carts and stationary systems. 

  • Complies with JIG bulletin 58
  • Compatible with LCR-II, LCR 600 and MASTERLOAD III™ electronic registers
  • Optional auto shut down

 

The maximum differential pressure is recorded during a fuel delivery by the LectroCount® LCR-II® or MASTERLOAD III™ Electronic Registers. The highest differential pressure reached during the delivery is printed on the delivery ticket to provide a record of the maximum pressure drop. The corresponding flow rate at which this maximum differential pressure is observed is printed on the delivery ticket immediately after the differential pressure reading. This information appears on the delivery ticket in the form: DP 12.4 PSI @ 242.6 GPM


All aircraft fueling equipment must have a filter/Separator or a Full-Flow Fuel Monitor.” “Full-Flow Fuel Monitors must meet IP “Specifications And Qualification Procedures - Aviation Fuel Filter Monitors With Absorbent Type Elements”, latest edition.” “Full-Flow Fuel Monitors, when used in systems with static fuel pressure in excess of 180 psig, must be equipped with a differential pressure device which will prevent excessive inlet pressure from rupturing elements in the event of complete blockage.
— July 22, 1996 reissue of ATA Specification 103, Standards for Jet Fuel Quality Control at Airports

OPERATION

In the aviation industry, a differential pressure of more than 25 psi across the full flow fuel monitor is considered unacceptable according to ATA Specification 103. A differential pressure of more than 15 psi across a water coalescer is considered to be unacceptable. The differential pressure transducer has a maximum differential pressure measurement range of 60 PSID.

Interlocks on the LCR-600 and MASTERLOAD III™, if employed, shut down fuel delivery if the differential pressure meets or exceeds the programmed differential pressure shutdown value. This is set from the calibration mode of the registers. The default value is 15 PSID. If the differential pressure reaches or exceeds the programmed shutdown value during a delivery, the delivery will end and an additional line of text appears on the ticket as follows:  **OVER-PRESSURE SHUTDOWN**


SPECIFICATIONS

 Environmental Rating

  • IP67 (similar to NEMA 4X)

 Safety

  • Designed to meet Class I, Division 2 Groups C and D requirements

 Materials of Construction

  • Body: Stainless steel (316L)
  •  Wetted Materials: Stainless steel (316L), Viton® seals

 Applicable Products

  • Class 2: Jet Fuel

 Pressure Rating

Differential measurement range

  • 0 to 43.5 PSID (0 to 3 bar) for rated accuracy [60.0 PSID (4 bar) overpressure limit]

Line pressure range

  • 0 to 150 PSI (0 to 10.3 bar)

 Accuracy

  • ±0.2% of full scale (±0.088 PSID from -4º to 104ºF (-20º to 40ºC))

 Power

  • +10 to 28VDC, <4mA

 Temperature Limits

  • -40° to 176°F (-40° to 80°C)

 Communication Protocol

  • RS485

 Register Compatibility

  • LectroCount® LCR-II®, LCR 600®
  • Avery-Hardoll MASTERLOAD III™