wtw Multi 9420 - Calibration Interval; ORP Measurement Settings

Settings Multi 9420
88 ba75964e04 04/2015
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by law.
9.1.3 Calibration interval
The calibration evaluation is displayed as a sensor symbol.
After the QSC function has been enabled the sensor symbol is replaced by the
QSC scale (see section 4.2.8 QSC
FUNCTION (SENSOR QUALITY CONTROL), page
40).
After the specified calibration interval has expired the sensor symbol or the
QSC scale flashes. It is still possible to measure.
Setting the calibra-
tion interval
The calibration interval is set to 7 days in the factory.
You can change the interval (1 ... 999 days):
9.2 ORP measurement settings
Settings The settings are made in the menu for measuring settings of the ORP measure-
ment. To open the settings, display the required measured parameter in the
measured value display and press the <ENTER> key. After completing the set-
tings, switch to the measured value display with <M>.
24 USABlueBook
*4.000
7.000
10.000
25 °C
25 YSI * 4.000
7.000
10.000
25 °C
The buffers are selected in the menu, pH / <ENTER> / Calibration
/ Buffer (see section 9.1.1 S
ETTINGS FOR PH MEASUREMENTS, page
84).
To ensure the high measuring accuracy of the measuring system,
calibrate after the calibration interval has expired.
No. Buffer set * pH values at
1. Open the menu for measurement settings with <ENTER>.
2. In the Calibration / Calibration interval menu, set the calibration interval
with <><>.
3. Confirm the setting with <ENTER>.
4. Quit the menu with <M>.