Xylem HandyLab 100 - Manual (Page 36)

Operation HandyLab 100
36 ba77062d01 03/2014
Preparatory activities Perform the following preparatory activities when you want to calibrate:
4.4.6 Calibration interval
The calibration evaluation is displayed as a sensor symbol.
The sensor symbol flashes after the adjusted calibration interval has
expired. It is still possible to measure.
Note
To ensure the high measuring accuracy of the measuring system, cal-
ibrate after the calibration interval has expired.
Setting the calibration
interval
The calibration interval is set to 7 days (d7) in the factory.
You can change the interval (1 ... 999 days):
+ -25 ... +25 -61 ... -60.5
or
-57 ... -56
- -30 ... +30 -62 ... -61
or
-56 ... -50
Clean the electrode according to the
electrode operating manual
Error Error
< -30 or
> 30 ... -62 or
... -50
Eliminate the error according to chapter
6 W
HAT TO DO IF ... (page 55)
Display Calibration
record Zero point
[mV] Slope [mV/
pH]
1 Connect the pH electrode to the meter.
The pH measuring window is displayed.
2 Keep the buffer solutions ready. Adjust the temperature of the
buffer solutions, or measure the current temperature, if you
measure without a temperature sensor.
1 Open the menu for measurement settings with [Menu]<F1>.
2 In the Calibration / Calibration interval menu, set the calibration
interval with <
><>.