YSI CarboVis 705 IQ - Manual (Page 45)

CarboVis 70x IQ
What to do if...
7 - 1 ba75950e02 11/2012
7 What to do if...
"----" display
(invalid measured value)
Implausible measured
values
Cause Remedy
– User calibration values
entered incorrectly
* Sensor check (H2O dest.) or
* Zero adjustment or
* Sensor check (standard)
defective
– Correct the entry and enter
once again (section 4.3.2)
Repeat
* Sensor check (H2O dest.) or
* Zero adjustment or
* Sensor check (standard) .
Check conditions, especially
cleanliness (section 4.3.3)
– Zero adjustment still errone-
ous after several trials
– Contact WTW
– Unknown – See log book
Cause Remedy
– Erroneous user calibration – Repeat user calibration. Make
sure the samples for compari-
son are representative.
– Substantial change of test
sample (sample matrix)
– Carry out new user calibration
– Measurement windows dirty – Clean the measurement win-
dows
– Sensor setting wrong – Check and, if necessary, cor-
rect the Measuring mode , Mea
-
suring location sensor settings
– Carry out new user calibration
– Optical system maladjusted,
e. g. due to inadmissible
mechanical shock
– Carry out
* Sensor check (H2O dest.) or
* Zero adjustment or
* Sensor check (standard)