10
• Record the temperature of the buffer solution from the thermometer
(e.g. 20 °C).
• Switch the instrument on by pressing On/Off.
• 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 (HI8633) or 1999 mg/L (HI8734) range by
pressing the appropriate range key.
• Follow LCD calibration indication. Adjust the calibration knob
until the display shows for HI8633 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 HI8734 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. temperature chart) or
“1251 mg/L” (see the TDS vs. temperature chart). All subsequent
measurements will be compensated to 20 °C.
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