Begin with the measurement.
Free chlorine
Review the free-chlorine residual at a representative monitoring point. MP5 is the PMA range label used here; its supplied guide uses MP5A. PMA will confirm the exact sensor generation and controlling specification.
Monochloramine
The legacy MP6 guide describes free chlorine and monochloramine. A total-chlorine result alone does not identify monochloramine. Agree the residual, operating mode and corresponding reference method.
Total chlorine
Total-chlorine and newer MP-TOTAL material must be assessed separately from legacy MP6. Do not transfer ranges or the legacy ORP parameter to a newer sensor without a confirmed model crosswalk.
Supporting water-quality information
pH, conductivity and temperature provide useful context alongside the residual. Additional parameters, including ORP, depend on the selected sensor model and revision.
