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Summary of Contents for BGB Projects S100
- Page 1 LPR Meter Handbook...
- Page 2 C O N T E N T S Section Page Number Number Introduction Page 1 Major Components Page 2 Three Operating Instructions Page 3 Four Corrosion Rate Measurement Operation Page 6 Five LPR Standard Page 9...
- Page 3 Introduction This handbook provides the Users Guide to the corrosion rate monitoring handheld meter supplied by BGB Projects Limited. The meter has been designed to remove the complex nature of corrosion rates by carrying out all of the calculations internally.
- Page 4 Major Components The following section outlines the major components of the system with a detailed explanation to there use. Handheld Meter The handheld meter is the major component within the system and carries out the Linear Polarisation test after pressing a series of buttons. The meter provides the following functions: •...
- Page 5 Operating Instructions The following section provides a step by step guide to the operating instructions for the corrosion rate meter. Set Up Reinforcement Reference Electrode Auxiliary Electrode Big Foot The above diagram provides the connections required to carry out the corrosion rate measurement. Note that either two connections are provided to the reinforcement or a single connection is acceptable if less than 10metres.
- Page 6 Connections Charger Lead (5 pin plug): +ve charger Black -ve charger and RS485 ground Yellow RS485 A Blue RS485 B ID Reader Lead (5 pin plug): White ID chip Black ID chip ground Pt100 Lead (4 pin plug): Pt100 sensor top Black Pt100 sensor ground PC Communication...
- Page 7 • Meter reads corrosion rate for 60 seconds (shown on display) (RED button pressed during the measurement skips any remaining delay) • Ecorr and corrosion rate are displayed • Select EITHER button • Meter confirms that data was stored • Select GREEN button for next reading and repeat.
- Page 8 Corrosion Rate Measurement Operation Introduction The LPR Handheld meter provides a complete corrosion rate measurement system on a single Eurocard PCB. Overview Corrosion rate measurement is carried out potentiostatically, using the three electrode linear polarisation resistance measurement method. The circuit samples the free corrosion potential of the test electrode, applies a 20mV anodic polarisation and measures resulting polarisation...
- Page 9 this output may move outside these limits to anywhere in the +/- 15V range. Although the circuit is designed to normally give a positive output, again, under certain conditions, (test electrode potential drift etc) it may be negative. Since the second output is generated by a digital to analog converter, it is somewhat more predictable, being always the 0 to 2.048V range.
- Page 10 where B is an empirically determined constant and R is the ‘polarisation resistance’ of the corroding interface. In order to calculate the actual penetration rate I corr substituted to the Faraday equation, giving: atomic weight corr × × × penetratio time ×...
- Page 11 LPR Standard LPR Meter Handbook Page 9...
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