Liquid Controls Differential Pressure Transducer - Manual (Page 4)

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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