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Overview, Over-pressure shutdown, Differential pressure (∆p) transducer overview – Liquid Controls Differential Pressure Transducer User Manual

Page 4: Ata specification 103

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The ∆P 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. The maximum differential pressure is

recorded during a fuel delivery by the LectroCount electronic

register. The highest differential pressure reached during

the delivery and the flow rate at which it occurred is printed

on the delivery ticket, providing a record of the maximum

pressure drop.

DP 12.4 PSI @ 242.6 GPM

LectroCount electronic registers can be programmed to shut

down a fuel delivery when the differential pressure transducer

measures a differential pressure that meets or exceeds a

programmed differential pressure shutdown value. 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**

The differential pressure shutdown is a safety feature that complies with Air Transport Association Regulations.

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.

overvIeW

Differential Pressure (∆P) Transducer Overview

The differential pressure (∆P) transducer is designed specifically for aviation fueling applications on jet fuel delivery

vehicles, hydrant carts and stationary systems. The ∆P transducer It is compatible with Liquid Controls LectroCount

LCR-II and LCR 600 electronic registers.

The differential pressure transducer is limited to a

maximum differential pressure of 60 PSID. Differential

pressure levels beyond this limit may damage or

destroy the differential pressure transducer.

!

Maximum P

The differential pressure transducer will only operate with LectroCount LCR-II electronic registers with SR214

operating software installed (version 4.04 or higher) and compatible ticket software installed (such as ST250).

LectroCount

LCR 600 electronic registers must be operating with SR601 software. If the electronic register does

not have the proper software installed, do not proceed until the register is flashed with the proper software

Ensure the Proper Software is installed

The July 22, 1996 reissue of ATA Specification 103, Standards for Jet Fuel Quality Control at Airports, states:

"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.”

ATA Specification 103 -

air transport association Regulations