The routine should reflect the brewery’s actual treatment arrangement and operating procedure. Production and cleaning context can help explain when a sample was taken, but does not establish the cause of an unusual result.
Agree the sampling point with the treatment team
Identify a safe point that represents the mixed liquor being assessed. Name the point consistently in the operating record and confirm how the sample should be collected and prepared. Do not assume that every brewery uses the same biological process.
Confirm technical suitability before introducing the instrument. The S3A’s specified MLSS range is 50 to 6,500 mg/L, with stated accuracy of ±10%. Discuss unusual samples or anticipated excursions with PMA rather than assuming that a different sampling point will make the instrument suitable.
Make timing repeatable
Choose sampling times according to the site procedure and record the treatment stage’s operating condition. Note relevant production or cleaning activities using the site’s own records. A vague label such as “morning sample” may not identify the same condition on every shift.
If the routine changes, mark the transition in the trend. Results taken at different process phases should remain identifiable rather than being presented as directly equivalent.
Record the whole settlement result
A representative 210 ml sample provides an S3A MLSS result in approximately 10 seconds. The instrument then continues the 30-minute settlement cycle, recording SVI, settled sludge level, supernatant clarity and floating sludge.
Label the sampling point and collection time
Keep the test method and relevant operating phase visible
Retain concentration and settlement information from the same sample
Distinguish unstirred SVI from optional stirred SSVI
Review unexpected results through the site’s agreed process
Keep the instrument’s role clear
The S3A supports sample-based operational checks in a safe area. It does not monitor beer production, continuously measure final effluent or provide COD, BOD or regulatory TSS compliance results. Keep required discharge sampling and laboratory analysis in place.
Do not treat one test as a control instruction. Compare the result with the brewery’s established operating range, observations and relevant laboratory information before deciding what investigation is needed.
Build on the brewery application guide
See the brewery effluent application for technical fit and the food-and-beverage overview for the wider treatment context.
Use the S3A parameter directory to define the recorded outputs. To review a proposed sampling routine, contact PMA with the treatment configuration and expected MLSS range.
