10
• Press and hold down Temp to display the
temperature.
• Adjust the TEMPERATURE knob to display 20°C.
• Release Temp key to display conductivity measurement.
• Select 19.99 mS/cm (HI 8633)
or 1999 mg/L (HI 8734) range
by pressing the appropriate
range key.
• Follow LCD calibration indication. Adjust the calibration knob until
the display shows for HI 8633 the conductivity reading at 25°C
(see the conductivity vs. temperature table), e.g. @ 25°C,
12880 µS/cm = 12.88 mS/cm, or for HI 8734 the TDS
reading at 25°C (see the TDS vs. temperature chart), e.g.
@25°C, 1382 mg/L.
• All subsequent measurements will be compensated to 25°C (77°F).
If you prefer to standardize the temperature compensation to
20°C (68°F) rather than 25°C (77°F), leave the TEMPERATURE
knob at 18°C (if the temperature of the solution is 18°C), adjust
the knob to read “11.67 mS” (see the conductivity vs. tempera-
ture chart) or “1251 mg/L” (see the TDS vs. temperature chart). All
subsequent measurements will be compensated to 20°C.
• The calibration is now complete and the instrument is ready for
use.
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