YSI 5000 - Manual (Page 53)

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c. Temperature compensation error: The variation from nominal response to sample temperature
is ±0.2% of the DO reading per degree C of the temperature difference between the
temperature of the sample and the temperature at which the probe was calibrated.
Type 3 Errors: Calibration
a. Sample temperature uncertainty error:
±1% of reading
This error is approximately zero when using AUTO CAL, when manually calibrating in the % air
saturation mode or when calibrating to a Winkler titration sample.
b. Error due to barometric pressure uncertainty of 9 mmHg (12 mbar):
±1.2% of reading
c. Error due to altitude estimation uncertainty of 500 ft (152m):
±1.8% of reading
This error is near zero when using AUTO CAL.
Error Calculation Example
The example given assumes that air calibration is used. If the Winkler titration calibration
method is used, type 3 errors are replaced by the uncertainty attributable to the overall Winkler
determination. This example is for an extreme combination of conditions.
Calibration conditions:
method: air calibration
temperature: 24°C
altitude: 600 feet (183 meters)
calibrated to: 8.24 mg/L
Measurement conditions:
temperature: 20°C
reading: 7.26 mg/L
mode: mg/L