Ion concentration
Multi 3320
40
ba77053e04
07/2018
7.2
Calibration
7.2.1
Why calibrate?
Ion-selective electrodes age and are temperature-dependent. This changes
the slope. As a result, an inexact measured value is displayed. Calibration
determines the calibration line of the electrode and stores this value in the
meter.
Thus, you should calibrate before each measurement (if possible), and at
regular intervals.
7.2.2
When to calibrate?
Before any measurement if possible
After connecting another ISE electrode
When the sensor symbol flashes, e.g. after a voltage interruption (empty
batteries)
7.2.3
Calibration (ISE Cal)
ISE Cal is the conventional
two-point
to
seven-point calibration procedure
that uses 2 to 7 freely selectable standard solutions. The concentration
expected in the measurement determines the concentration of the calibration
standards.
2.
When measuring without temperature sensor:
– Temper the test sample, or measure the current temperature.
1.
Connect the ISE electrode to the meter.
The pH/U/ISE measuring window is displayed.
2.
Keep the standard solutions ready.
3.
When measuring without temperature sensor:
– Temper the test sample, or measure the current temperature.
4.
In the measured value display, select the ISE measuring window with
<
> <
>
and
<M>
.
5.
If necessary, change the unit of the measurement result and calibration
standards in the
ISE setup
/
Unit
menu.
6.
Start the calibration with
<CAL>
.
The calibration display appears.
Содержание WTW Multi 3320
Страница 1: ...OPERATING MANUAL ba77053d04 07 2018 Multi 3320 METER FOR 2 SENSORS PH ORP D O COND 3320 ...
Страница 8: ...Overview Multi 3320 8 ba77053e04 07 2018 ...
Страница 102: ...Glossary Multi 3320 102 ba77053e04 07 2018 ...
Страница 104: ...Index Multi 3320 104 ba77053e04 07 2018 Two point calibration ISE 42 pH 26 30 Z Zero point of pH electrode 25 ...
Страница 105: ......
