Hach Ultra ORBISPHERE 510, Руководство оператора

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62 of 138 Calibration Menu - Orbisphere 510/511/512 Analyzers
Operator Manual
ORBISPHERE
Calibration Results
A calibration screen will be displayed showing current
measurement data which is continually refreshed.
The value “% ideal slope” is a percentage of the slope
against the ideal slope. If this percentage is not within the
accepted range, an error message is displayed and the
calibration process fails (see
“Calibration Errors (EC and
TC sensors)” on page 63 ). A warning message will be
displayed when this value is close to the boundaries, but
when calibration can be accepted.
The message is first displayed in the result box. The
dialog box with the error message or the warning is
displayed when the finish button is pressed.
The value “% last calibration” shows the ratio between the
current measurement and the previous sensor calibration.
.
The value “% variation” indicates the variation during the
last 3 measurements, which is the stability of the
measurements. A variation as low as possible is needed
for a precise calibration.
The display shows the actual calibration parameters, and
the actual readings (temperature, barometer, slope).
Note:
In case of a calibration failure, consider replacing the
membrane. See the
TC Sensor Maintenance Manual
for details.
Verification
Similar to the calibration procedure, but for verification of
the actual calibration values. The result of the
measurements made during the verification is not stored
and the actual calibration data is not modified.