7
Calibration procedures
The RPI is not calibrated but monitored with a control cycle.
7.1 - Control cycle
With the control cycle the measurement accuracy is validated. This cycle will take a maximum of 20 minutes
and uses RPI-Check (conductivity range of 16.5-17.5 mS/cm @25˚C).
The accuracy of RPI-Check is guaranteed through RR Mechatronics measurement and quality control
procedures, and based on a Certified Reference Material produced by the Danish National Metrology
Institute.
The assigned value as stored in the RFID tag has an uncertainty U(k=2) of 0.025 mS/cm.
The RPI measures the conductivity of the RPI-Check and compares it to limits based on the conductivity
value stored in the NFC-tag on the RPI-Check bottle. If the measured conductivity is within the limits, the
control cycle is passed and the control cycle is finished. If the measured conductivity fails, the GUI will
display an error. Production can only be started again after a successful control cycle.
Normally the control cycle is started automatically, but can be performed manually with "
Start Control cycle
"on
the tab "
Manual
".
The home screen shows the filling level, indicating when the RPI-Check bottle must be replaced. At least 5
control cycles can be performed with one bottle. See the
Maintenance chapter
for further instructions.
When these messages occur, the RPI-Check bottle has to be replaced:
Calibration procedures
38
MRN-184-EN Version 6 (05-01-2022)
