Choosing a conductivity salinity logger part 2 of 2
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Part 2 of a two-part presentation detailing five important considerations when choosing a conductivity/salinity data logger, presented by Paul Gannett, Product Marketing Manager, Onset Computer Corporation, maker of HOBO Data loggers.
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Choosing a conductivity salinity logger part 2 of 2
- 1. onset ® Choosing a Conductivity/Salinity Logger: 5 Important Considerations Part 2 of 2 Paul Gannett Product Marketing Manager HOBO ® 4/25/2012 ONSET COMPUTER 1 1
- 2. onset ® Choosing a Conductivity/Salinity Logger: Deployment Considerations - Calibration Lab Calibration vs Field Calibration Lab calibration Field calibration Great for the initial deployment Easier for ongoing deployments HOBO ® 4/25/2012 ONSET COMPUTER 2
- 3. onset ® Choosing a Conductivity/Salinity Logger: Deployment Considerations – Data offload A waterproof data shuttle can provide easy and reliable data offload in wet environments HOBO ® 4/25/2012 ONSET COMPUTER 3
- 4. onset ® Choosing a Conductivity/Salinity Logger: 5 Important Considerations • Accuracy • Mounting • Ease of deployment and data offload • Software • Cost of ownership HOBO ® 4/25/2012 ONSET COMPUTER 4
- 5. onset ® Choosing a Conductivity/Salinity Logger: Software Look for software that makes it easy to configure your logger and analyze data • Intuitive point-and-click configuration • Multi-logger graphing and analysis • Ability to format, annotate and save graphs Consider ease of data integration • Merging data from multiple loggers • Data export – for use in other programs or databases • Data import – for bringing in related data HOBO ® 4/25/2012 ONSET COMPUTER 5
- 6. onset ® Choosing a Conductivity/Salinity Logger: Software Look for software that provides the conversion methods & accuracy you need • Salinity calculated with Practical Salinity Scale 1978 (PSS-78) (2 to 42 ppt range) • Specific conductance – there are several temperature compensation methods: – Linear compensation (%/C) – Freshwater compensation EN27888 – Non-linear seawater compensation • Ability to use field calibration readings, preferably from both the start and end of deployment to adjust for fouling. HOBO ® 4/25/2012 ONSET COMPUTER 6
- 7. onset ® Choosing a Conductivity/Salinity Logger: 5 Important Considerations • Accuracy • Mounting • Ease of deployment and data offload • Software • Cost of ownership HOBO ® 4/25/2012 ONSET COMPUTER 7
- 8. onset ® Choosing a Conductivity/Salinity Logger: Cost of Ownership Think beyond the initial purchase price! • Look for a logger that will last many years – Housing material – Delrin or Titanium for saltwater – stainless steel is good for freshwater, but corrodes in saltwater – Non-contact sensors last longer than electrodes that are in contact with the water • Regular sensor cleaning extends the logger’s life – look for one that is easy to clean • Replacement batteries and sensor extends the life of your logger • Using a waterproof shuttle avoids risking your laptop in the field • Software that saves you time can reduce your cost: – Easy logger configuration and data analysis – Software that can compensate for fouling means you don’t have to go into the field as often HOBO ® 4/25/2012 ONSET COMPUTER 8
- 9. onset ® Recap of the 5 Important Considerations • Accuracy • Mounting • Ease of deployment and data offload • Software • Cost of ownership HOBO ® 4/25/2012 ONSET COMPUTER 9
- 10. onset ® Example: HOBO Conductivity/Salinity Logger • Records conductivity & temperature • Durable Delrin® housing • Non-contact sensor for long life • Easy-to-clean sensor with Titanium Pentoxide coating • Two models: – Freshwater range: $699 – Saltwater range: $750 • Optical interface for high-speed data offload in wet environments • Compatible with HOBO Waterproof Shuttle for easy data retrieval HOBO ® 4/25/2012 ONSET COMPUTER 10
- 11. onset ® HOBOware Conductivity Assistant • Calculates Salinity using PSS-78 • Uses field meter readings for • Calculates Specific Conductance calibration of conductivity data with choice of temperature • Start and end calibration points compensation methods: used to compensate for fouling – Linear compensation – Freshwater compensation: EN27888 – Seawater compensation based on PSS-78 HOBO ® 4/25/2012 ONSET COMPUTER 11
- 12. onset ® HOBOware for graphing and analysis • Intuitive point-and-click configuration • Multi-logger graphing and analysis • Ability to format, annotate and save graphs • Merge data from multiple loggers • Data export – for use in other programs or databases • Data import – for bringing in related data HOBO ® 4/25/2012 ONSET COMPUTER 12
- 13. onset ® Choosing a Conductivity/Salinity Logger: 5 Important Considerations Questions? HOBO ® 4/25/2012 ONSET COMPUTER 13
- 14. onset ® We will send an email with a link to this webinar Additional Resources at onsetcomp.com: - Detailed product information - White papers - Application notes - Webinars on using our software HOBO ® 4/25/2012 ONSET COMPUTER 14
- 15. Contacting Onset Questions about this webinar: Paul Gannett Direct Tel: 508-743-3149 paul_gannett@onsetcomp.com General Product Questions: Onset Technical Support: Product Application Specialists: 8am – 8pm EST Monday – Friday Tel. 1-800-564-4377 1-800-564-4377 / 508-759-9500 sales@onsetcomp.com loggerhelp@onsetcomp.com 4/25/2012 Onset Computer Corp – www.onsetcomp.com
- 16. onset ® Choosing a Conductivity/Salinity Logger: 5 Important Considerations Questions and Answers Thanks for attending! HOBO ® 4/25/2012 ONSET COMPUTER 16