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4.4 Setting the ATC Slope for unknown samples
The factory default setting for this item is 2.00 %/
O
C. If this is satisfactory, go directly to section
4.5.
The ATC Slope for the unknown sample solution is the rate at which the Conductivity of the
solution changes per degree Celsius. This is important, as TDS values are calculated from
Conductivity. The ATC Slope must be set correctly on the
smart
CHEM
-C
to enable the Automatic
Temperature Compensation system to work correctly. If the ATC Slope is not known, please refer
to section 19.2 for details on how it can be calculated.
To set the ATC Slope for unknown samples…
1. Select ATC Slope entry.
(
→
→
F4:Setup
→
→
F6:Next
→
→
F1:ATC Slope
→
→
F1:Sample
).
The following screen is displayed…
Enter A.T.C. Slope
of sample:2.00%
2. Type in the ATC Slope of the unknown sample, including the decimal point. Use the
key to
make any corrections. Enter 0.00% to obtain absolute readings, without any temperature
correction being applied.
3. Press
to save the ATC Slope of the unknown solution.
Alternatively, press
to quit without changing the current setting.
4.5 Setting the ATC Slope for the Calibration Standard
The factory default setting for this item is 2.00 %/
O
C. If this is satisfactory, go directly to section
4.6.
The ATC Slope for the Calibration standard is the rate at which the Conductivity of the solution
changes per degree Celsius. This is important, as TDS values are calculated from Conductivity. The
ATC Slope must be set correctly on the
smart
CHEM
-C
to enable the Automatic Temperature
Compensation system to work correctly. If the ATC Slope is not known, please refer to section 19.2
for details on how it can be calculated.
To set the ATC Slope for the Calibration Standard…
1. Select ATC Slope entry for the Calibration Standard.
(
→
→
F4:Setup
→
→
F6:Next
→
→
F1:ATC Slope
→
→
F2:Standard
).
The following screen is displayed…
Enter A.T.C. Slope
of Standard:2.00%
2. Type in the ATC Slope of the Calibration Standard, including the decimal point. Use the
key
to make any corrections. Enter 0.00% for absolute readings, without any temperature correction
being applied.
3. Press
to save the ATC Slope of the Calibration Standard.
Alternatively, press
to quit without changing the current setting.