Nova-Tech 2700 Series Benchtop Meters - Manual (Page 40)

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Additional dissolved oxygen calibration notes:
• Keep the membrane free from contact with solid objects.
• Use with aqueous solutions only.
• Do not submerse the probe past the immersion limit (see below).
• See Section 22—DO Electrode Maintenance for additional information.
• Calibration adjustment is limited to ±40% of the factory default value to
prevent erroneous calibrations.
• If % calibration is attempted with a value of 10.1% to 49.9%, a
“Calibration Error” will result. The following table lists corresponding
calibration values in % saturation calibration mode:
% Saturation
(of factory default value)
Calibration Value
less than 10% 0%
10.1% to 49.9% Calibration Error
50% to 150% 100%
• Calibration of the concentration mode will only replace the previous
concentration calibration and does not affect the % saturation calibration.
• To offset your % saturation reading to match another instrument, see
Section 15—Offset Calibration .
• Perform daily calibration for best results. New calibration values will
automatically override the previous calibration.