Conductivity Calibration; Preparation; One-Point Calibration - Hach sensION+ MM150 Manual

6. Operation

6.4. Conductivity calibration

Important note: before turning on the instrument, check that the sensor is connected.
The instrument must be calibrated before taking the first conductivity reading.
The calibration can be performed with 1, 2 or 3 points.

6.4.1. Preparation

1. Fill the tubes with the standard solutions (note the fill level).
2. Unscrew the protector and rinse the sensor with plenty of deionized water.
3. Screw the sensor on to the tube containing the first standard.
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6.4.2. One-point calibration

Dip the sensor into the tube several times to homogenize the liquid. Do not
hold it by the tube to avoid heating of the standard solution.
Follow the diagram on the next page.
This form of calibration is acceptable when conductivity values around that
of the standard solution used are being measured.
Note: if the measuring instrument is not used for 5 minutes, it shuts off
automatically.
If errors occur during calibration, an error message will appear on screen
(see pg. 23).
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sensION+ MM150 HACH 0710.indd ANG:14 sensION+ MM150 HACH 0710.indd ANG:14
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Fig. 6. Preparation
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