VERMONT TECHNOLOGIES PVT.LTD. VERMONT TECHNOLOGIES PVT.LTD.
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Microcompt Batch Controller

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. Microcompt is designed for refuellers, tank trucks and marine applications.
Microcompt Batch Controller
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SALIENT FEATURES
 
• Self-diagnostic
• Meter error curve linearization
• Large 6-digit backlit LCD display
• Tamper-proof and sealed calibration facility and approved by Weights & Measures department
• Accepts all types of interlocks for fail-safe operation
• Can be used with any make of flow meters and pulse generators
• RS-232 / RS-485 connectivity
• Flameproof enclosure for hazardous area application
• Weatherproof to IP-65
 
PRINCIPLE OF OPERATION
   
Microcompt realizes a self-test at start-up, and also periodically during operation, to ensure connectivity with external devices and systems.

The Microcompt can be programmed for a predetermined product quantity to be loaded prior to a delivery or as a Start / Stop system where unspecified product quantity can be delivered. In both the options, relay options are provided to control pumps and tank valves. Product delivery is started only after proper functioning of all the interlocks. The delivery commences with gradual opening of the set stop valve controlled by the Microcompt. Loading operation parameters like batch quantity, flow rate can be seen on large 6-digit backlit LCD display.

The interlocks like vehicle earthing, tank low input, etc. are continuously checked. Failing validation of any of the interlocks, Microcompt stops the loading operation and activates the priority alarm with a message on the display. The valve closure takes place in multi-stages, making it gradual and shock free.
microcompt-batch-controller
   
Microcompt can be used with -
 
   
• Open or closed type loading valves
• Set Stop Valve
• Step-by-step (digitally controlled) valves
 
   
Password protection provides security over set up parameters. Weights & Measure seal is attached to a switch located in side the instrument.

During product delivery, Microcompt constantly monitors the meter flow rate and linearizes the meter accuracy curve to give unmatched metering accuracy.

As Microcompt is designed for truck application, special features like low frequency / voltage functioning, vibration dampening, ticket printing as per customer requirement.

In the case of sudden power failure during product delivery, all the process data is stored into the EEPROM memory of the equipment.
   
   
EQUIPMENT CONFIGURATION
 
   
The Microcompt is equipped with a EEPROM memory, in which all the configuration parameters like multipoint meter K-factors, password and related information are stored.

The parameters are field-settable, with tamperproof sealing facility provided on the rear side of the equipment. To configure the parameters, the calibration window on the rear side is opened and the calibration switch is actuated. The parameters can then be edited by using front push buttons. Once the equipment is configured for the required operating conditions, the switch is de-actuated and the window is sealed.
 
 
SELF-DIAGNOSTIC FEATURES
 
During the delivery, Microcompt constantly monitors the operating conditions for and logs an alarm if any of the conditions goes beyond threshold limits.
These conditions include -

• Meter over / under speeding
• Product temperature beyond threshold limits
• Absence of product after valve opening
• Pulse transmitter failure
• Electrical power failure
• Interlock failure like vehicle earthing, tank low alarm, etc.
   
   
In case of electrical power failure, Microcompt retains following information in its EEPROM memory -

• Current volume
• Accumulated totaliser
• Operational flags
   
PERIPHERALS
 
   
Microcompt may be associated with various types of peripherals, depending upon the case it will perform as either master or slave unit.
   
PLC / COMPUTER
 
   
Microcompt can be connected to a PLC or a computer via a MODBUS link. This allows remote control of the loading operation, presetting of quantities to be delivered, recovery of meter data, access control to the loading position, etc
   
PRINTERS
 
Different types of printers can be connected via a serial link. Microcompt can be interfaced to an industry standard Slip Printer and can offer the possibilities of printing out all information in the form of a loading ticket.
   
STANDARD SPECIFICATIONS
 
   
• POWER REQUIREMENT Voltage : 12 VDC / 24 VDC / 110 VAC / 230 VAC
• Current : 250 mAmp
• Data Entry : 4 nos. multi-function push button keys
• Display : 1" size, 6-digit, 7-segment, backlit LCD display
• Memory : 64 KB EEPROM - a sophisticated firmware package to govern the system operation
• Battery : Not required as all the data is stored in EEPROM memory
   
INPUTS
 
PULSE TRANSMITTER
microcompt-batch-controller
• Type : Rectangular wave
• Voltage : +12 V DC, 300 ohm typical Impedance
• Frequency : 0 to 2000 Hz
• No. of Channels : Two
• Duty Cycle : 10/90 or 90/10 pulse setting
 
ANALOGUE
• Type : PT-100 three wire RTD
• Temperature : -20°C to +75°C
• Accuracy : +/- 1°C
• Resolution : 0.1°C
• Quantity : 1 no.
   
 
DIGITAL
microcompt-batch-controller
• Voltage : 12 VDC
• Quantity : 2 nos.
SERIAL COMMUNICATION
• Port-1 : RS-232 for serial printer
• Port-2 : RS 485 optically isolated, for host communication
• Protocol : MODBUS RTU
• Baud Rate : Programmable to 2400 / 4800 / 9600 / 19200 BPS
OUTPUTS
• Type : Optical TTL output
• Voltage : 12 VDC / 230 VAC
• Current : 50 mA
• Quantity : 4 nos.
• Type : Potential-free
• Voltage : 12 VDC / 24 VDC / 230 VAC
• Quantity : 2 nos.
OPERATING ENVIRONMENT
• Temperature : -20°C to +60°C
• Humidity : 0 to 95% RH, non-condensing