EUTECH INSTRUMENTS DO 6, Instruction Manual, Page: 19 / 76

Instruction Manual DO 6
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calibration failure for 0% Saturation slope calibration; the meter may have
exceeded the limit of 10% of the factory calibrated absolute value. The sensor
may have to be re- conditioned. Also, note that the DO 6 meter will not perform
0% or 100% Saturation calibration for absolute value ranging from 10.1% to
49.9%. The meter also will not perform the mg/L (ppm) Concentration
calibration for an absolute value of less than 2.00 mg/L (ppm) or calibration
which is out of its window tolerance of +/- 40% from the factory default value.
An error message of “Err.1” will be indicated and will return the meter to the
measurement mode.
All new calibration values will automatically override the existing data. It is
recommended to calibrate the meter periodically and or if it is suspected to be
inaccurate.
Always rinse the probe with either DI water or rinse solution before and after
each calibration/sample measurement. When calibrating in air, make sure that
any water droplets from the probe’s membrane are removed.
For details please refer to Section 8
-
PROBE CARE AND MAINTENANCE
.
Note: The DO6 factory calibrated default value is in respect to 760mm Hg or
101.3 kPa barometric pressure (sea level).
To set the barometric pressure to
different value, see Section 5.4.1 Pressure Setting Adjustment.