The Importance of Reference Measurements
Reference measurements are a critical part of maintaining accurate and trustworthy analyzer data in water treatment
applications. They provide validation, improve understanding, and help diagnose real-world issues.
Reference Measurements Are Required in Most Applications
- USEPA 334.0 states that, for a drinking water facility with an online analyzer, “comparative grab samples are required no less frequently than once per week…”
- Other regulatory bodies require daily reference samples.
- Recommended: enter 3–5 reference measurements per week.
Reference Measurements Provide Critical Insight: Case Study
- A customer noticed differences between analyzer readings and DPD measurements and was dissatisfied.
- After overlaying analyzer signals with DPD measurements, the customer clearly saw alignment.
- Result: increased confidence and satisfaction with analyzer performance.
Real Issues Reference Measurements Solve
- Clarifies tolerance expectations: ±15% vs. ±0.1 ppm (USEPA 334.0)
- Helps detect:
- Probe fouling
- Proper sensor cleaning frequency
- Identifies:
- Scaling discrepancies between analyzer and SCADA systems
Entering Reference Measurements Is Easy
- DPD2CC® app allows entry of DPD measurements anytime, anywhere.
- Integrates directly with Cloud Connect®, Kuntze’s remote monitoring and data processing tool.
