Manual
10
for calibration by means of a solution with a pH value of 10
deleting the existing calibration
10. By pushing the Enter button you can finish the calibration.
Note:
You should make at least a two-point calibration (i. e. pH 7 and pH 4 calibration or pH 7 and pH
10 calibration). First calibrate with pH7 and afterwards with pH 4 / pH10. Between the processes, clean
the electrode with distilled water. Carry out the two-point calibration at least twice.
5.5
Conductivity measurement
Note:
The default settings of the meter are:
displayed unit = µS, mS
temperature unit = °C
temperature compensation factor = 2 % per °C
automatic range selection
automatic power off deactivated
sampling time of the data logger = 2 seconds
CAUTION:
When first using the probe along with the meter, urgently calibrate before starting with the
measurement.
To measure conductivity:
1.Put the plug of the conductivity probe into the CD socket (15)
2.Switch on the device.
3.
Select the “Cd“ measurement mode.
4.Hold the handle of the probe and dip the complete probe head into the solution.
6.Shake the probe to make sure that the air bubble escapes from the probe head.
6.The display will show the conductivity value and the measured temperature value.
Manual range selection
Automatic range selection is set as default for measuring conductivity, but by means of the Range button
you can switch between the two ranges.
Zero adjustment
When the probe is not in the solution to be measured and the display still does not indicate “Zero“, you
can force “Zero“ to be displayed by pushing the zero button (5) for at least 10 seconds.
Note:
Zero adjustment is only possible in the range of 200 µS and with a deviation of < 2 µS.
5.6
TDS measurement
The procedure is as in conductivity measurement. The only difference is that the unit most be switched
from µS/mS to ppm.