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Fully automatic concentration control in PCBA cleaning

03-23-2016 08:55 AM CET | Industry, Real Estate & Construction

Press release from: ZESTRON Europe

When PCBAs are cleaned a lot of factors influence the cleaning result. There are not only the residues which have been cleaned from the PCBAs but also process-dependent influences like evaporation or transportation of cleaner into the rinsing stage. To achieve permanent good cleaning results, continuous monitoring of the cleaning bath is recommended. For this purpose, manual and automatic methods exist. Manual methods are the measurement of conductance or pH value. However, the result of both measuring methods is influenced by temperature or contamination and do not provide absolute values. Furthermore, if only the above mentioned parameters are analyzed then the cleaning bath quality often cannot be evaluated efficiently when employing water based cleaning processes. On the other hand the concentration of the cleaning agent provides a very good guide to efficiency. To evaluate this parameter there are rapid manual chemical tests, based on acid-base titration, and also refractive index measurement. However both methods are only fully effective with fresh cleaning baths, whereas a further manual concentration measurement method based on the phase separation procedure e. g. the ZESTRON® Bath Analyzer works very reliably and accurately independently of contamination.

Besides the above mentioned low priced manual bath monitoring methods there are automatic techniques available, such as the ZESTRON® EYE. Utilizing that system, both cleaner concentration and temperature is measured permanently and in real-time. This measurement is more precise than the manual measurement methods and furthermore resistant to contamination. Besides the continuous process data documentation the data can be saved for up to two years providing full traceability. The ZESTRON® EYE is compatible with all common cleaning machines on the market and can communicate with their PLCs. It’s expandable by addition of an automatic dosage system (dosage of concentrate and DI water), directly controlled from the measurement data of the ZESTRON® EYE.

The additional automatic method is the ZESTRON® EYE CM (CM: ‘concentration management’), a product new to the market, a fully automatic stand alone module, performing both automatic concentration measurement and automatic dosage.

For further information, please visit us at SMT Hybrid & Packaging at booth 321 in hall 7 or go to www.zestron.com.

Headquartered in Ingolstadt, Germany, ZESTRON – a business division of Dr. O.K. Wack Chemie GmbH, is the globally leading provider of high precision cleaning products, services and comprehensive solutions in the electronics industry. With seven technical centers worldwide, cleaning trials can be replicated to the processes conducted on customer sites.

It is ZESTRON’s philosophy to develop cleaning products that are innovative and unprecedented in the industry, thereby ensuring that our customers always remain one step ahead. More than 20% of ZESTRON’s staff is dedicated to our extensive research and development programs, with more than 10% of profit reinvested in this sector. As the innovation leader, we are fully committed to providing the most cost-effective and environmentally sound solutions while meeting all other aspects of cleanliness, reliability and safety requirements.

Franz Wutz
ZESTRON Europe
... a Business Division of Dr. O.K. Wack Chemie GmbH
Bunsenstraße 6
85053 Ingolstadt
Tel: +49 0841 635-176
Fax: +49 0841 635-40
Email: franz.wutz@zestron.com

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