Microcompt is a powerful flow computer designed to meet the requirements of all types of fluid metering installations. Based on the latest CMOS technology, the equipment offers a great extent of flexibility in terms of operating conditions.Download Literature in pdf format.

DESIGN FEATURES

• Can be used with all types of measuring devices like Turbine, Positive displacement, Mass Flow Meters etc.
• Meter error curve linearisation.
• Self-diagnostic.
• Accepts all types of interlock for fail-safe operation.
• Tamper-proof & sealed calibration facility.
• Large 5-digit display.
• Can be used in stand-alone mode or connected to remote system via network communication.
• Explosion proof enclosure for hazardous area application.
• Weatherproof to IP-65.

PRINCIPLES OF OPERATION

Microcompt realizes a self test at start-up & periodically during operation to ensure connectivity with external devices & systems. When connected in the network, Microcompt accepts the pre-determined quantity of the product to be loaded from the remote system. On the receipt of product quantity, Microcompt prompts the operator to initiate the batch by pressing the 'ST' key. The delivery of the product is started only after the proper functioning of all the interlocks. The delivery commences with gradual opening of the set stop valve.

Loading operation parameters like batch quantity, flow rate, product temperature etc can be displayed on large 5 digit display on request by pressing respective push button. The interlocks like vehicle earthing, loading arm orientation etc. are continuously checked.

Failing validation of any of the interlocks, Microcompt blocks the loading operation & activates the priority alarm with a message on the display. The valve closure takes place in multi stages making it gradual & shock free. Microcompt can be used with

• Open or closed type loading valves
• Set Stop Valve.
• Step by step (digitally controlled) valves.

In the absence of remote system, the equipment switches itself into degraded mode. In this mode, all the preset parameters can be entered locally through the multi function push button keys provided on the front panel.

During product delivery, the Microcompt constantly monitors the Meter flow rate & linearises the Meter accuracy curve to give an unmatched metering accuracy of +/- 0.05%.

During delivery, all the field parameters are communicated to the remote system via serial link using MODBUS protocol.

In case of sudden power failure during product delivery, all the process data is stored into the battery backed memory of the equipment.

EQUIPMENT CONFIGURATION

The batch controller is equipped with a non-volatile memory in which all the configuration parameters like multi-point Flow Meter 'K' factors, reference temperature, station address, etc. are stored. The parameters are field settable with tamper proof sealing facility provided on the rear side of the equipment.

To configure the parameters, the calibration window on the rear side of the equipment is opened & the calibration switch is actuated. The parameters then can be edited by using front push buttons. Once the equipment is configured for the required operating conditions, the switch is de-actuated & the window is sealed.

SELF DIAGNOSTIC FEATURES

Microcompt realizes self check at startup, in which it checks the connectivity with all the field & control room equipments. In case of any problem with the connectivity of field device, the same is reported to the control room on a serial link & an alarm is logged. In case if the conneativity with the control room fails, Microcompt automatically switches itself into stand alone mode. In this mode, it allows the user to set the predetermined quantity of the product locally.

During delivery, Microcompt constantly monitors the operating conditions for & logs an alarm if any of the conditions goes beyond threshold limits. These conditions include:

• Meter over / under speeding.
• Product temperature beyond threshold limits.
• Product leakage through valve.
• Absence of product after valve opening.
• Pulse Transmitter failure.
• Electrical power failure.
• Interlock failure like Vehicle Earthing / Loading Arm failure.

In case of electrical power failure, Microcompt retains, in it's battery backed up memory, following information:

• Current volume.
• Accumulated totaliser.
• Operational flags.

PERIPHERALS

The Microcompt may be associated with various types of peripherals & depending on the case, will perform as either master or slave.

MAGNETIC CARD READER

When connected to the Magnetic Card Reader through twin wire link, depending on the application, Microcompt can ensure verification of access to the loading bay, identification of the operator, automatic quantity preset etc.

PLC / COMPUTER

The Microcompt may be connected to a PLC or computer via a MODBUS link. This allows remote control of the loading operation, preset of quantities to be delivered, recovery of metering data provided by the Microcompt, access control to the loading position etc.

PRINTERS

Different types of printers can be connected to the Microcompt via a serial link or current loop. They offer the possibilities of printing out all information concerning the loading operation in the form of a loading ticket or listing.