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SensoDirect 150
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.
CD CAL.
^, v ENTER: Y
23.5 °C
1.413
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
2
.
•
The temperature unit is set to °C.
•
Auto power off.
•
Data logger sampling time: 2 seconds.
Summary of Contents for Lovibond SensoDirect 150
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