Measurement procedure – Hanna Instruments HI 96831 User Manual

Page 8

MEASUREMENT PROCEDURE

Verify the instrument has been calibrated before taking measurements.
1. Wipe off prism surface located at the bottom of the sample well. Make sure the prism and

sample well are completely dry.

2. Using a plastic pipette, drip sample onto the prism surface. Fill the well completely.

Note: If the temperature of the sample differs significantly from the temperature of the

instrument, wait approximately 1 minute to allow thermal equilibration.

3. Press the READ key. The

results are displayed as %
Volume or Freezing Point.

Note: The last measurement value will be displayed until the next sample is measured or the

instrument is turned off. Temperature will be continuously updated.

Note: The ”ATC” tag blinks and automatic temperature compensation is disabled if the

temperature exceeds the 0-40 °C / 32-104 °F range.

3. Press the ZERO key. If no error messages appear, your unit is calibrated.

(For a description of ERROR MESSAGES see page 11).

Note: The 0.0 screen will remain until a sample is measured or the instrument is turned off.
4. Gently absorb the ZERO water standard with a soft tissue. Use care not

to scratch the prism surface. Dry the surface completely. The instrument
is ready for sample measurement.

Note: If the instrument is turned off the calibration will not be lost.