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INSTRUCTION MANUAL HI96832 Digital Propylene Glycol Refractometer Hanna Instruments Inc., 584 Park East Drive, Woonsocket, RI 02895 USA www.hannainst.com...
All rights are reserved. Reproduction in whole or in part is prohibited without the copyright owner’s written consent, Hanna Instruments Inc., Woonsocket, Rhode Island, 02895, USA. Hanna Instruments reserves the right to modify the design, construction, or appearance of its products without advance notice.
• hand sanitizer and lotion • antifreeze HI96832 device benefits from Hanna Instruments’ years of experience as a manufacturer of analytical instruments. The digital refractometer eliminates the uncertainty associated with mechanical refractometers and is easily portable for use in the field.
4 Specifications 3. SPECIFICATIONS Range 0.0 to 100.0 % V/V % Volume Resolution 0.1 % V/V Accuracy ±0.3 % Range 0.0 to −51.0 °C (32.0 to −59.8 °F) Freezing Point Resolution 0.1 °C / 0.1 °F Accuracy ±0.5 °C / ±1.0 °F Range 0.0 to 80.0 °C (32.0 to 176.0 °F) Temperature...
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In the HI96832, light from an LED passes through a prism in contact with the sample. An image sensor determines the critical angle at which the light is no longer refracted through the sample.
Measurement Guidelines 6. MEASUREMENT GUIDELINES • Handle instrument carefully. Do not drop. • Do not immerse instrument under water. • Do not spray water to any part of instrument except the “sample well” located over the prism. • The instrument is intended to measure propylene glycol solutions. Do not expose instrument or prism to solvents that will damage it.
8 Calibration Procedure 7. CALIBRATION PROCEDURE Calibration should be performed daily, before measurements are made, when the battery has been replaced, between a long series of measurements, or if environmental changes have occurred since the last calibration. 1. Press the ON/OFF key, then release. Two instrument test screens will be displayed briefly; all LCD segments followed by the percentage of remaining battery life.
Measurement Procedures 8. MEASUREMENT PROCEDURES 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.
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10 Measurement Procedures To Change Measurement Unit Press the RANGE key to select measurement units. The instrument toggles between the two measurement scales each time the key is pressed and the primary display indicates “VoL” % Volume or “FrPt” for Freezing Point. When the instrument displays the screen with 4 dashes, it is ready for measurement.
Making a X % Propylene Glycol Solution 9. MAKING A X % PROPYLENE GLYCOL SOLUTION To make a Propylene Glycol Solution, follow the procedure below: • To make an X % propylene glycol solution volumetrically add X mL of high purity propylene glycol (CAS #: 57‑55‑6; MW 76.09) to a 100 mL Grade A volumetric flask. •...
If the repair is not covered by the warranty, you will be notified of the charges incurred. If the meter is to be returned to Hanna Instruments, first obtain a Returned Goods Authorization number from the Technical Service department and then send it with shipping costs prepaid.
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