Xylem NiCaVis 705 IQ Operating Manual page 35

Optical sensor for nitrate and carbon sum parameters
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NiCaVis 705 IQ
Result
Sensor
after
check (H2O dest.)
Result
Zero
after
adjustment
ba75953e03
05/2017
15.
Confirm each checklist with <OK> until the
appears.
Up to this point, you can break off the calibration procedure at any
time with the <ESC> key. The system continues to work with the old
calibration data. The maintenance condition, however, has to be
switched off again in any case.
After starting the calibration with the <OK> key (step 16.) you can no
longer cancel the calibration procedure.
16.
Confirm with <OK>.
The measurement is started. After the end of the measurement the
result appears. With the
calibration history at the same time.
Rating number
Meaning
Sensor check (H2O dest.)
Zero range
(-40 ... +40)
(0 = no deviation)
Positive number
Measured values were too low.
(+40 ... +1000)
Possible cause:
The measurement windows are contaminated.
Negative num-
Measured values were too high.
ber
Possible cause:
(-40 ...-1000)
During the last zero adjustment, the measurement
windows were contaminated more than during the
current sensor check.
If the rating number is not in the zero range:
Repeat the cleaning procedure and the
number no longer changes significantly.
If the rating number is still outside the zero range, a new zero adjustment is nec-
essary.
Result
Meaning
OK
Zero adjustment
Error
Zero adjustment
ful.
If the result is erroneous, clean the sensor and all equipment once again. Then
Zero adjustment
carry out a new
are absolutely clean.
Start measurement
Zero adjustment
, the result is entered in the
successful (OK)
Sensor check (H2O dest.)
Sensor released for
measurement
successful.
yes
not success-
No ("----")
and when doing so make sure the conditions
Measurement / Operation
display
until the rating
35

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