
5
5
5
5----9
9
9
9
5.7 Temperature Compensation
The sensitivity of the sensor varies with temperature changes. The higher the
temperature, the more sensitive the sensor becomes. A temperature
compensating algorithm has been implemented to adjust for a maximum change
of 3 degree Celsius within each sample cycle in auto mode, (Sample temp. vs
Reference temp.) or from the most recent calibration in manual mode. If a
greater change than this is occurring, the rate of change is too fast to guarantee
reliable results. Error checking routines will display an error message if this is
the case.
It is reasonable to expect that using the SPORT outside may result in some
instances where the temperature rate of change (rising and falling) is quite fast.
Please refer to Appendix F–Temperature Effect on Operation for further
information about this subject.
5.8 Software Structure
The SPORT incorporates self-test and error detection capabilities to prevent
reporting erroneous results.
Microprocessor Self Test
Microprocessor Self Test
Microprocessor Self Test
Microprocessor Self Test
If at initial power up the display does not become active, press the reset button.
If this does not correct the problem, try turning the main power switch off and
on again. If this does not help, call YSI Technical Support for repair assistance.
Also at power up and prior to each sample cycle, the processor does a fast self
test of the electronics to see if any stored data has been corrupted, or if the
software has been physically changed. If changes are detected, warning
messages will be displayed. Refer to Section 9 Troubleshooting for a listing of
the error messages and the possible causes and corrective actions.
Electrode Checks
Electrode Checks
Electrode Checks
Electrode Checks
The background current and noise levels of the electrode are monitored prior to
and during both the calibration and sampling cycles. If the error limits are
exceeded, an appropriate error message will be displayed. Refer to Section 9
Troubleshooting for a listing of the error messages and the possible causes and
corrective actions.
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