FormGauge
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Continuous on-line measurement of basis weight/consistency on the paper machine

The NDC FormGauge provides basic, accurate, continuous, and reliable basis weight or consistency measurement. A small measurement probe mounted on the underside of the wire is interfaced to a compact display unit. This panel-mounted electronic control unit (ECU) displays the instantaneous basis weight or consistency measurement directly in customer engineering units, i.e., g/m2, lbs/1000ft2, etc. A panel mounted ECU displays target weight. Other functions include data communication to host systems, high/low limit alarms, shutter status and multi-level passcode protection.

Theory of Operation

The measurement technique is based upon the Compton Photon Backscatter principle (commonly called gamma backscatter). A low activity radioisotope in the probe emits low-energy gamma rays which are collimated and directed at the measured material. These gamma rays interact with the product, lose energy, and are then scattered back toward the detector in direct proportion to the mass of the measured material. An efficient scintillation crystal/photomultiplier detector converts the backscattered gamma energy to photons of light and ultimately to a digital signal which is directly related to product weight/area of consistency on the paper machine. Unique to the gamma backscatter sensor is its insensitivity to product color, composition or opacity changes.

Features
  • One-sided contact or non-contact fixed position measurement
  • Continuous digital readout of weight/area or consistency
  • Insensitive to changes in product color/composition, or opacity
  • Easy to set-up and operate
  • Serial communication RS232, RS485
  • 4-20mA (non-isolated) analog output
  • Programmable recipes for targets, calibration parameters, alarm limits, etc.
  • Simple installation in tight spaces
  • Reliable, easy to maintain
  • New field replaceable sensor ceramic wearplate

Benefits
  • Determine on-line numerical "dry-line" value
  • Improve paper quality and formation
  • Monitor and control drainage and vacuum

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Korins Co.,Ltd.
Rm301, #24-2, Youido-Dong, Youngdungpo-Ku, Seoul, Korea
Tel. : (02)780-4848 Fax.:(02)780-1244, 786-1244

sales@korins.com