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7.3 %/uA @ 20°C. If the probe slope (1 mil membrane) is greater than
12.6 %/uA or lower than 5.9 %/uA, the membrane/probe may need
service. See 12. Troubleshooting, Error Codes, E3 and E4.
C: The temperature at the time of calibration in °C.
Sensor
Press the [SENSOR] soft-key to display the following sensor diagnostics screen:
System Parameters
Sensor
Cal. Temperature = 22.85 C
Probe Slope = 6.43 %/uA @20C
Probe Offset = 0.000 uA
Probe Current = 16.91 uA
Pressure Offset = 830 mbar P = 981
Cal. Temperature: The temperature at the time of the last calibration in °C.
Probe Slope: The slope of the dissolved oxygen probe in percent per microamp
corrected to 20°C. The slope of an ideal probe using a 1 mil
membrane is 7.3%/uA @ 20°C. If the probe slope (1 mil
membrane) is greater than 12.6 %/uA or lower than 5.9 %/uA, the
membrane/probe may need service. See 12. Troubleshooting, Error
Codes, E3 and E4.
Probe Offset: The zero offset current (background current) of the DO probe in
microamps. The factory default value is 0.000 uA. This value will
only change after a zero calibration is performed (see 6.2 Zero
Calibration). If this value is greater than 0.15uA (after a zero
calibration) the membrane/probe may need service. See 12.
Troubleshooting, Error Code E2.
Probe Current: The present (real time) DO probe current in microamps.
Pressure Offset: The offset of the barometer in millibars. This value will change
whenever the barometer is calibrated. The normal range is 300 to
1300 mbar.
P: Current barometer reading in millibars.
Press [MODE] to return to the Diagnosis menu. Press [MODE] two more times to return to the
Main menu.
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