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Hach polymetron 9240 - Section 9 Maintenance and Diagnostics; 9.1 Maintenance schedule; 9.2 Battery replacement

Hach polymetron 9240
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100
Calibration
8.8 Custom adjustment
8.9 Temperature calibration
Where the analyzer displays values that are slightly above or
below the expected value, the CUSTOM.ADJ option can be
used to manually adjust the measurement value.
Enter a positive or negative value which will be added to the
measurement value.
This option can only be used to make minor adjustments. The
allowable adjustment value is between -0.1 ppb and +0.1 ppb.
If the displayed and expected values differ significantly, the
analyzer should be recalibrated.
Select the TEMPERATURE CALIB. option to calibrate the
temperature electrode.
The measured temperature reading is displayed in the raw
temp field.
Take a temperature reading with a certified thermometer and
press OK to continue.
Then enter this temperature reading into the CAL.TEMP. field.
Press OK to calibrate.

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