The machine is composed of:
LEV7 supports two probe configurations:
Side Wall installation - water cooled metal probe with Platinum tip
Top installation - vertical alumina probe type with platinum tip
Glass level measurement is achieved through a Platinum/rhodium sensor that, by touching the glass surface closes the detection circuit. The probe assembly is moved up and down by means of a sturdy crank-rod mechanism with two different speeds, starting with a higher speed, as the probe approaches the glass, the speed is reduced for accurate glass level detection.
The crank position is controlled by a high precision encoder and the resulting vertical stroke is calculated by the control PLC.
When glass is detected the machine reacts simultaneously by:
As a result of this process the PLC will then update two analog or digital output signals, proportional to the measured glass level and the glass level set point.
The output signals can be used to:
Directly drive a batch charger machine (the LEV7 model, through a PID loop or ON/OFF control, is ready for direct control of a batch charger).
Displaying/processing through another management system (PLC, DCS, etc.).
The system is designed for easy handling of all working parameters such as: frequency of the measuring cycle; ON/OFF electrical impulse; approach speed; measuring speed; etc...
All parameters are easily set on the touch-screen display.
Vertical probe position regulation by mechanical handle: maximum stroke 100 mm and position indicator with a resolution of ± 1 mm
Internal ball bearing type autorotation probe device
Vertical shaft movement on ball bearings
Quick change mechanism to facilitate easy probe removal
Cabling through suitable connectors for easy machine connection
LEV7 MAIN FEATURES
Auto zero detection
Glass level auto calibration
Level Set Point programmed from touch-screen, with process overview
Touch screen LCD
Movement by asynchronous servo-cooled motor driven by vectorial inverter, directly coupled on gear-box (without belts or chains)
Vertical movement by sturdy crank-rod mechanism with ball bearings
Resolution: ± 0.1 mm
Repeatability: ± 0.1 mm
Max vertical stroke: 40 mm
Encoder can be excluded in case of fault
Dedicated transformer for electric impulse to avoid glass sticking
Programmable electric shock timing
Programmable probe speeds
Programmable measure-cycle timing
Alarm messages on touch screen display
Programmable High and Low level alarms
Alarm contact output by electro-mechanical relay
RED-GREEN-YELLOW lights for immediate indication of machine status
2 programmable 4 to 20 mA outputs
ON/OFF output contact to drive ON/OFF batch charger
Batch charger direct drive PID loop feature
Ethernet Modbus optionally available
Installed power: 0,34 kW, 220 VAC, 50 Hz.
(others available on request)
SIDE WALL CONFIGURATION
Water cooled side installation. Single pipe probe in stainless steel with platinum/rhodium tip Ø3 mm x 15 mm, total length 1600 mm. For this installation a side slot will be required in the forehearth or the distributor.
Cooling water flow: 20 litres/min
Max temperature cooling water Input: 35°C
Max temperature cooling water Output: 45°C
Water cooling pressure range: 2 to 4 bars
Water request: chloride 50ppm, ph 8 to 8.5 calcium content 40ppm max
INSTALLATION FROM THE TOP
Vertical probe in alumina 799 with platinum/rhodium tip Pt Ø2 mm x 15 mm.
The probe total length is 1000 mm plus the DIN type connector head.