YSI IQ S ENSOR N ET NitraVis 70x IQ - Manual (Page 33)

NitraVis 70x IQ
Measuring / Operation
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If no valid zero adjustment is possible under the current conditions, you
can restore the readiness for measurement by measuring with an older
valid zero adjustment.
To do so, select the Zero adjustment setting in the sensor settings
Factory (factory zero adjustment) or User (last valid user zero adjust-
ment).
Then check the measurement results with a Sensor check (standard) .
Suitable standards (check equipment) for your sensor are available as
accessories (see chapter 6).
Result after
Sensor check (standard)
Completing the sensor
check or
Zero adjustment
After a successful sensor check or Zero adjustment , return to measure-
ment as follows:
Store the sensor sleeve in a clean environment, e. g. in a plastic bag,
until the next sensor check or Zero adjustment .
Result Meaning
OK Sensor check (standard) successful.
Error Sensor check (standard) not successful.
Possible cause: wrong or expired standard
17. Confirm the calibration result with <OK>.
18. Confirm the message, "After successful cal ..." with <OK>.
The display returns to the measured value display. The mea-
sured value flashes because the sensor is still in the mainte-
nance condition.
19. Pour away the ultrapure water or standard solution and
remove the sensor sleeve.
20. Screw in the blind plug or compressed air connector and install
the sensor at the measuring site.
21. After the Sensor check (standard) :
Thoroughly rinse the sensor and sensor sleeve with ultrapure
water.
22. Switch off the maintenance condition (use <> to select
the UV-VIS sensor, press <OK> and make the setting in the
Display/Options menu).
23. Switch to the measured value display with <M>. The measured
value stops flashing.