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4. Conductivity Mode
4.1 Selecting Conductivity Mode
1. Select Mode (
→
→
F3:Mode
→
→
F5:Conductivity
).
2. The
smart
CHEM
-D
now proceeds to Conductivity measurement mode. Note that a “
∗∗
” is
shown in place of the decimal point until a successful calibration has been performed (see
section 4.4).
4.2 Setting the Conductivity calibration standard
The factory default for this item is 2.76mS/cm. If this is satisfactory, go directly to section 4.3.
1. Select the Conductivity Standard entry
(
→
→
F4:Setup
→
→
F1:Standards
→
→
F1:Conductivity.
).
The following screen is now displayed…
Conductivity
Standard:2760.uS
Range
20uS/cm to 2000mS/cm
2. Type in the value of the Conductivity standard that is to be used for calibration, including the
decimal point. Use the
key to make any corrections.
3. Press
to save the value of the standard solution.
Alternatively, press
to quit without changing the current setting.
4. The
smart
CHEM
-D
will now ask you to enter the units for the Conductivity standard…
Conductivity
Standard:2760
Select Units
F1:uS/cm F2:mS/cm
Press
to set the Conductivity Standard as µS/cm.
Press
to set the Conductivity Standard as mS/cm.
5. The Conductivity standard is now programmed for use at calibration.
4.3 Conductivity sensor k factor
The
smart
CHEM
-D
automatically recognises whether a k=0.1, k=1.0 or k=10 Conductivity sensor
is being used via links in the connector.
Calibration settings for the various k factors are NOT stored separately. The
smart
CHEM
-D
requires re-calibration when a new k factor sensor is connected.
If the
smart
CHEM
-D
has been calibrated on one k factor sensor and a different k factor sensor is
subsequently connected, the word “
Probe
” appears instead of the Conductivity reading. In this
case, it is necessary to re-calibrate the Conductivity reading before proceeding.
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