KROHNE OPTISYS CL 1100 EN - Manual (Page 30)

5
OPERATION
30
OPTISYS CL 1100
www.krohne.com 01/2013 - 4002492301 - MA OPTISYS CL 1100 R02 en
Step 4: calibration procedure
• After choosing the submenu product cal. (step 3a) or product cal. A (step 3b) in the previous
steps, continue by pressing >.
i The signal converter demands to choose the kind of temperature compensation for
calibration. You have the options "automatic", "manual" and "off" (for detailed information
refer to
Temperature compensation on page 22).
• If you chose "automatic", just press ^. If you chose "manual", first enter the temperature of
the measured medium using or and then press ^.
i The signal converter demands to choose the kind of pH compensation. You have the
following options: "automatic", "manual" and "off" (for detailed information refer to
pH
compensation on page 25).
• If you chose "automatic", just press ^. If you chose "manual", first enter the pH value of the
measured medium using or and then press ^.
• Press or until the submenu start calib.highlighted .
Press > to enter the chosen menu
i The measured value appears on the display.
• Assure that the measured medium flows with at least 30 litres per hour; if necessary wait until
the measured value is stable.
• Once the measured value is stable, press ^ and wait 25 seconds.
i The signal converter now asks store value?
• Choose yes using or and then press ^.
i The signal converter now performs a measurement which takes 25 seconds. Carry out the
next action during this time.
To perform a successful calibration please consider the installation of the sensor (for detailed
information refer to
Installing the sensor on page 12).
1. Mounting in an outlet pipe
You can start with the calibration. While the signal converter performs a measurement
(25 seconds), take a sample of the measured medium. Determine the free chlorine/chlorine
dioxide/ozon concentration in a laboratory using the DPD method according to
DIN EN ISO 7393 - 2. If the laboratory test is not possible immediately, you can leave the
calibration menu and go back into the measuring mode (the measured value at the time of taking
the sample is stored and can be checked in the menu point "stored value").
2. Mounting in a bypass or direct pipe
Before starting the calibration procedure close the outlet valve and open the probe valve to take
a sample. Proceed as mentioned under "1. Mounting in an outlet pipe".
CAUTION!
When calibrating the Cl
2
measurement, the temperature and pH compensation have to be
configurated.
INFORMATION!
The "stored value" is a calculated value based on the actual measurement. The signal converter
calculates this value depending on the compensation methods (pH and temperature
compensation) chosen for the calibration. Do not change the compensation method in the time
between the measurement of the "stored value" and the input of the reference value. Otherwise
this could result in a wrong calibration.