Nova-Tech SALT 6+ - Manual (Page 15)

Instruction Manual COND 6+, TDS 6+, SALT 6+
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3.2 Preparing the Meter for Calibration
For best results, select a standard value close to the sample value you are measuring.
Alternatively, use a calibration solution value that is approximately 2/3 the full-scale
value of the measurement range you plan to use. For example, in the 0 to 2000 µS/cm
conductivity range, use a 1413 µS/cm solution for calibration.
Use fresh calibration standard solutions. Reuse of standard solutions may impair
calibration and accuracy of measurements. Store solutions in a dry, dark, and cool
environment when possible while limiting exposure to air.
Rinse or immerse the probe before calibration and between samples with clean water
(deionized water is ideal).
3.3 Selection of Auto or Manual Calibration (COND 6+)
The COND 6+ is capable of automatic or manual calibration. The factory default setting
is automatic.
In the automatic calibration mode, the COND 6+ will automatically select one of (4)
calibration standard values (see below) depending on the range and normalization
temperature being used.
Automatic calibration is useful when all your calibration standards fall into one of the
groups listed below. For example, if your 1413 µS/cm standard reads as 1400 µS/cm
during calibration, you would simply press “ENTER” to accept this value using automatic
mode. In manual mode, you would have needed to press the increment button 13 times
before pressing “ENTER”. If you will use a calibration standard that is not listed below,
select manual calibration instead.
Normalization
Temperature
Calibration Standards (Range)
25 °C
1. 84 µS/cm (for 0 – 200 µS/cm)
2. 1413 µS/cm (for 0 – 2000 µS/cm)
3. 12.88 mS/cm (for 0.00 – 20.00 mS/cm)
4. 111.8 mS/cm (for 0.0 – 200.0 mS/cm)
20 °C
1. 76 µS/cm (for 0 – 200 µS/cm)
2. 1278 µS/cm (for 0 – 2000 µS/cm)
3. 11.67 mS/cm (for 0.00 – 20.00 mS/cm)
4. 102.1 mS/cm (for 0.0 – 200.0 mS/cm)
Table 1: Conductivity Calibration Standards for Auto Calibrations