10.19.1 Manually Calibrating The Ph Or Redox Sensor; Detailed Procedure For The 1- Or 2-Point Calibration Of A Ph Sensor - Burkert 8619 Operating Instructions Manual

• The "warning" event may be associated with one and/or other of the digital outputs (see
section 9.26).
• See also section 16.3 If you encounter problems.
CALIBRATION LOG: Read the latest valid calibration values.

10.19.1 Manually calibrating the pH or redox sensor

• The pH sensor can be calibrated according to a 1-point or a 2-point procedure.
• The redox sensor can only be calibrated according to a 1-point procedure.
• Modify the default calibration limits before calibrating your sensor (see section 9.28).
• In order not to interrupt the process, activate the HOLD function (see section 10.2).
• Before each calibration, correctly clean the electrode with a suitable product.
• In a 2-point calibration, the buffer solutions used must be at the same temperature.
• Set the periodicity of calibrations in the "Calibration Interval" function (see page 161): each time a
calibration is due, the device generates a "maintenance" event and a "warning" event.
10.19.2 Detailed procedure for the 1- or 2-point calibration of a pH
sensor
• The 1-point calibration procedure is used for rapid calibration by adjusting the zero of the measurement
graph with a buffer solution with a known pH (to calibrate a pH sensor: see below) or a known oxidation
reduction potential (to calibrate a redox sensor: see page 164).
• The 2-point calibration procedure is used for accurate calibration of zero and the slope of the meas-
urement graph of the pH sensor. This operation requires 2 buffer solutions: in general a first solution with a
pH of 7 and a second solution with a pH very close to that of the value to be measured. See next page.
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English
Type 8619
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