Calibration Liquiline CM44P
130 Endress+Hauser
11 Calibration
• Sensors with Memosens protocol are calibrated at the factory.
• Users must decide whether the process conditions present require calibration during
initial commissioning.
• Additional calibration is not required in many standard applications.
• Calibrate the sensors at sensible intervals depending on the process.
Operating Instructions "Memosens", BA01245C
11.1 Calibration instructions
Calibration
(according to DIN 1319)
A calibration is defined as an operation to establish the relationship between the
measured value or expected value of the output variable and the related true or correct
value of the measured variable (input variable) for a measuring system under specified
conditions.
A calibration does not alter the performance of the measuring device.
Adjustment
An adjustment corrects the value displayed by a measuring device, in other words the
measured/displayed value (the actual value) is corrected so that the reading agrees with
the correct, set value.
The value determined during calibration is used to calculate the correct measured value
and saved in the sensor.
Measuring points consisting of a photometer sensor, flow assembly (if provided) and a
transmitter are adjusted at the factory. Normally adjustment is not required when
commissioning for the first time.
If an adjustment is desired nevertheless, you have the following adjustment options:
• Adjustment with calibration standards
• Use of Easycal
11.1.1 Calibration with standard solutions
Use solutions with a known absorbance (at the sensor wavelength) for the calibration/
adjustment.
L
WARNING
Potassium dichromate is toxic, flammable, carcinogenic and has mutagenic effects!
Can cause cancer, genetic defectives, affect fertility, harm the unborn child and intensify
fires. Potentially life-threatening if inhaled, toxic if swallowed, harmful if it comes into
contact with skin. Causes severe skin burns and severe eye damage!
‣
When working with potassium dichromate, always wear protective gloves and
protective goggles.
‣
Seek special advice before use.
‣
Follow all of the instructions on the manufacturer's safety data sheet.
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