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except for changing the display unit from µS, mS to ppm. For detailed procedures please
refer to chapter 7.9 CD (µS, mS), TDS (ppm) Setting.
4.3 Calibration
1.
Obtain a the standard conductivity solution:
For example:
•
2 mS range calibration solution:
1.413 mS Conductivity Standard Solution
•
200 µS range calibration solution:
80 µS Conductivity Standard Solution
•
20 mS range calibration solution:
12.88 mS Conductivity Standard Solution
or other Conductivity Standard Solution.
2.
Install the "Probe Plug" (Fig. C-1 ) into the "CD Socket" (Fig. A-14).
3.
Power on the meter, and set the mode to conductivity measurement (µS, mS ).
4.
Hold the probe body (Fig. C-2) and completely immerse "Sensing Head" (Fig. C-3 ) in
the standard solution. Swirl the probe to let any air bubble escape from the sensing
head. The display will show the conductivity mS ( mS ) values.
5.
Press the "REC" button and "HOLD" button at the same time. The display will show
the following screen, as an example. Now release.
6.
Use " " button (Fig. A-5), " " button to adjust the upper display value to match the
standard conductivity value.
7.
Press the "Enter" button twice to save the calibration data, and finish the calibration
procedure.
•
If only one calibration point is needed, just set the 2 mS range (1.413 mS Cal.).
•
A multi-point calibration procedure should always start with 2 mS range
(1.413 mS Cal.), then proceed to other ranges (20 µS range, 20 mS range or
200 mS range) if necessary.
23.5 °C
5. DO (Dissolved Oxygen) Measuring and Calibration Pro-
cedure
ATTENTION: Make sure the Oxygen probe is filled with Electrolyte!
To fill the Probe's Electrolyte, refer to chapter 5.3 "Probe maintenance", page 15.
The meter default settings are as follows:
• The display unit is set to % O
• The temperature unit is set to °C.
• Auto power off.
• Data logger sampling time: 2 seconds.
30
1.413
CD CAL.
^, v ENTER: Y
.
2
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