YSI IQ S ENSOR N ET VARiON Plus 700 IQ - Manual (Page 45)

VARiON
®Plus
700 IQ Measuring
5 - 1 ba76000e01 01/2012
5 Measuring
5.1 Measuring operation
Note the data given in section 9.2 A PPLICATION CONDITIONS , especially
the minimum immersion depth of the sensor (> 50 mm with mounted
protective hood).
Note
To keep the sensor clean, we recommend to use the CH cleaning head
(see chapter 7 R
EPLACEMENT PARTS AND ACCESSORIES ).
5.2 Factors affecting the measured value
Caution
Greases, oils, certain tensides and similar substances can
shorten the operational lifetime of the electrodes. Therefore, they
should not be present in the test sample.
For measurement with the VARiON
®Plus
700 IQ the following
influencing variables can be important, depending on the measured
parameter:
Note
The effects of influencing variables on measurement and
compensating actions are described in detail in the YSI primer, I
ON
SELECTIVE MEASUREMENT IN ONLINE ANALYSIS .
Measured parameter Influencing variable
Ammonium  pH value
 Potassium ions
Nitrate  Chloride ions