Xylem YSI VARiON Plus 700 IQ H, Руководство по эксплуатации, Страница: 31 / 62

VARiON
® Plus
700 IQ H Matrix adjustment, check and calibration
31
ba76207e02 12/2020
diately using a syringe filter for transport to the laboratory or to sta-
bilize it otherwise. When adding stabilizing solutions, the dilution
factor has to be taken into account.
 When determining the reference concentrations in the lab (step 2),
you can use the sensor for control purposes at the same time. The
sensor continues to use the data of the previous matrix adjustment
(or calibration). The reference voltages determined in step 1 will not
be lost. They remain stored until step 3 of the matrix adjustment is
completed. They do not have to be noted and entered again.
 Use the Online help if you are unsure of anything during the matrix
adjustment.
4.2.3 Result of the matrix adjustment
Evaluation After the matrix adjustment, the system automatically evaluates the
current condition of the electrode(s) based on the drift voltage. For a
successful matrix adjustment, the drift voltage must be within the range
-45 mV to +45 mV. The drift voltage is set to 0 mV if you have selected
a zeroing.
At the end of the matrix adjustment procedure the drift voltage of all
selected electrodes is shown on the display. The evaluation is indicated
with a check mark (

= successful) or a minus sign ("-" = not
successful).
Taking over the
determined values
For each successfully adjusted electrode you can individually decide
whether the values should be stored for measurement.
Sensor history The data of the matrix adjustment are available in the Sensor history
(see section 4.4 S
ENSOR HISTORY
).
If the matrix adjustment was erroneous due to an incorrect
determination or entry of the reference concentration, you
can correct the entry (if necessary several times). If, by
doing so, it is not possible to eliminate the error, the
complete matrix adjustment for this electrode has to be
repeated or discarded. If it is discarded, measurement is
continued with the values of the last valid matrix adjustment
(or calibration). Values of successfully adjusted electrodes
that were already stored are retained.
Actions for error elimination are given in the Online help
and in chapter 8 W
HAT TO DO IF
....