MASTERLOAD II™Electronic Meter Controller for Aircraft Refuelling Vehicles

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General Information

Dynamic Calibration at all flow rates

The MASTERLOAD II™ is a microprocessor-based electronic meter controller. The system consists of a pulse transmitter (mounted on the meter), a display unit, and a power supply unit. A platinum resistance thermometer (PRT), printers, and any additional displays are optional and available. All MASTERLOAD II components are intrinsically safe and ideal for use in Category 2 hazardous areas.

Displays of batch delivery, rate of flow and totaliser are given on three large liquid crystal displays that provide readouts of batch volume, flow rate and the totaliser. These displays can be easily configured to show alternative values such as temperature compensated volume and volume to weight conversions. Additional displays can show repeat or supplementary information at other convenient locations on the refuelling vehicle.

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• Accurate, dynamic meter calibration

• Volume to weight conversion.

• Temperature compensation (option)

• Two-way data interchange to cab mounted datacapture systems

• Interface to deadman system

• Interface to accessories with 4-20 mA output

• Flexible installation

Features

The Avery-Hardoll MASTERLOAD II™ is a versatile micro processor based electronic controller. It is an intrinsically safe system that is ideal for use in Category 2 hazardous areas and is comprised of a pulse transmitter mounted on the meter, a display unit giving readouts of batch volume, flow rate and a totaliser.

MASTERLOAD II™ provides accurate error correction across the entire flow range.

Conventional meters are calibrated at only one flow rate - generally at 100% flow, despite the reality that meters operate at a variety of flow rates.

MASTERLOAD II calibration is corrected at all flow rates to provide the highest level of accuracy. With a choice of 1, 2, 4 or 8 calibration points across the full flow range - the system allows the user the flexibility to configure each MASTERLOAD II to suit the requirements of their own application. It performs a flow curve fitting exercise to provide the required correction.

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Additional Features

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MASTERLOAD II™

System Schematic

TEMPERATURE COMPENSATION

An add-on option that provides a temperature display. Using a platinum resistance thermometer (PRT), the display may be configured to show product temperature or mean batch temperature. Alternatively, full temperature correction to standard temperature or to the IP/ASTM tables 53 and 54 may be configured.

VOLUME TO WEIGHT CONVERSION

Provides a reading in weight. Available as either a simple manually entered density figure for low cost batch conversion or a dynamic input from an in-line densitometer which when linked to temperature correction offers the highest level of accuracy.

DATA COMMUNICATION to RS422 SPECIFICATION

Offers comprehensive two way data communication between the meters and a variety of vehicle systems allowing data flow from the meter to the system and user input passed back to the meter. Approved to EN ISO 6551-1995 level A, Masterload offers the highest level of data security available.

AUTOMATIC CALIBRATION

When calibrated against a masterload reference meter. A simple infra-red connection links any Masterload meter to a Masterload reference meter. This allows calibration to be carried out completely automatically thus reducing down time, volume of product passed and the potential for human error. Calibration certificates are computer generated to the IP or customer’s own specification.

DEADMAN INTERFACE

The power supply unit provides a permanent signal to the deadman circuit. If an error occurs, the signal is removed and the deadman shuts the fuelling off.

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Pulse Transmitters

MASTERLOAD II™

Consult the factory when certified engineering drawings are required. Dimensions shown are not suitable for construction or modifications

Dimensions

DISPLAY UNIT POWER SUPPLY UNIT

241

255

222 45

80

80 253

265

222

80

112

MASTERLOAD II™

Preset display unit.

MASTERLOAD II™

Preset display unit fitted with temperature compensation.

MASTERLOAD II™

Preset display unit fitted with temperature compensation and AutoCal link.

PULSE TRANSMITTERS

Liquid Controls POD

Electronic Pulse Output Device

Avery Hardoll Pulsers

Display Options

MASTERLOAD II™

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Liquid Controls105 Albrecht Dr.

Lake Bluff, IL 60044www.lcmeter.com

Copyright © 2015 Liquid Controls

Specifications

Sealing:All units are designed for outdoor use and are sealed to specification IP 65

Security:Full wire sealing Automatic error checking Alarm reporting Data Storage for 40 transactions

Operating Temperature-20 to 40° C

Transmitter: Temperature: -30 to 120° CFitting: Direct drive available for most makes of meterApproval: EN ISO 6551-1995 Level A Channels: 3 IndependentSecurity: Sense line

Humidity: Resistant up to 100% R.H.

Temperature Probe PRTAccuracy: +/-0.1° C Discrimination: 0.1° CRange: -30 to 120° CSet Up: Factory set Alarm Limits: ProgrammableDisplay: °F or °CCompensation: 15, 20 or 31.5° C

Safety Classification: Category 2

LCD Display:Batch: Min. volume - one unit 6 figures standard units(2 decimal places selectable) Flowrate: Sampled every .6 secs Totaliser: 8 figureRemote Displays: Up to 3 remote display units.Interfaces: RS422• 7 switch monitoring contacts• Auto calibration portID Mode: Simple password entry

ATEX Approvals:Power Supply Unit: (flameproof)

- II 2 G EEx d IIB T6- Cert. No. ITS04ATEX11903

Display Unit:- II 2 G EEx ib IIB T4- Cert. No. BAS02ATEX2199

Locations: Flexible mounting: (max 50 meters between units)

Delivery Override: Key Operated IP 65 Box (option)

Non-volatile Memory: Infinite data retention

Power Supply:12/24 VDC

Power consumption:350mA max. (excluding relays)

Relays:Max of 11 plug-in Typical - 1 Deadman Pulse output

Inputs:4-20mA (4)

Manual Input: Density for weight indication

Linearisation:1, 2, 4 or 8 selectableFull dynamic interpolationAccuracy: +/- .02 @ measuring condition and 15° C if temperature compensation fitted.

Product correction tablesIP/ASTM Table Selection to IP65Generalised crude (A tables)Generalised productsTable 54Table 53