triOS Free Chlorine, Руководство по эксплуатации

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D01-905en201912 Manual eCHEM Free Chlorine
Calibration
// Free Chlorine
5 Calibration
5.1 Manufacturer Calibration
No manufacturer calibration is performed due to application-related changes in measured values (pH, inflow velocity, etc.). The
sensors are only tested under standard conditions (concentration, pH, inflow velocity etc.) in an endurance test.
5.2 Customer calibration
A customer calibration using the DPD-1 method ("free chlorine") must be carried out in the application. The installation and
other conditions must match the final application.
Recommendation: Weekly control, if necessary more frequently. In case of a necessary recalibration, operation with a TriOS
controller is recommended. An integrated wizard guides the user step by step through a calibration menu. The value determi-
ned analytically in parallel by the DPD method is set as the reference value in the controller.
Please note the following explanations for direct Modbus access:
Calibration
The values for zero point (X_Null), slope (X_Span) and then date and time are written to the sensor. The sensor electronics
accepts the new calibration data if the date stamp is sent within approx. 5 seconds following the values. If the date differs from
that of the last calibration, the new values are stored in the history memory and the oldest values are overwritten.
Date / Time stamp
• Data type: unsigned long
• 2
32
= 4294967296
• Year: (20)42, Month: [94], Day [96], Hour [72], Min: [96]
• Last possible date: 31.12.2042, 23:59