This article applies to Krypton® DIS and Krypton® Multi systems used with the Argon StabiFlow® sample assembly. Stable hydraulic conditions are required for precise, repeatable disinfectant measurement.
Why constant flow matters
To produce a precise and consistent disinfectant measurement, a constant flow of water through the assembly is required. Changing flow rate affects sensor response, temperature exchange, and calibration validity.
The Kuntze Argon StabiFlow® regulates and controls flow through the system sample line at a constant and consistent ~30 L/h (approximately 8 GPH). To achieve this regulated flow, the inlet flow rate must be 35 L/h or higher (approximately 9.2 GPH or higher).
Flow and pressure specifications
| Parameter | Requirement | Notes |
|---|---|---|
| Regulated sample flow (StabiFlow®) | ~30 L/h (~8 GPH) | Set by the internal flow regulator |
| Minimum inlet flow | ≥ 35 L/h (≥ ~9.2 GPH) | Required for stable regulation |
| Minimum inlet pressure | 0.5 bar | At sample inlet |
| Maximum inlet pressure | 6 bar (at 20 °C) | Do not exceed during operation |
Note: The Kuntze disinfectant measurement is pressure-proof up to 6 bar (at 20 °C), but the more controlled and lower the pressure, the fewer operational issues you are likely to see during commissioning and daily operation.
Maintain a positive pressure differential from inlet to outlet (minimum about 0.5 bar) and keep flow stable during calibration and normal measurement.
On-site checks
- Confirm inlet flow and pressure meet the values above before relying on DIS readings.
- If flow is too low, the display may show Digital input 1 (no water) or equivalent—see troubleshooting for DI1 and StabiFlow® maintenance.
- After service or plumbing changes, verify flow status on the display and repeat calibration only when flow and temperature are stable.
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