Specifications HI83749 Range 0.00 to 1200 NTU Range Selection automatic Resolution 0.01 (0.00 to 9.99 NTU); 0.1 (10.0 to 99.9 NTU); 1 (100 to 1200 NTU) Accuracy @25°C/77°F ±2% of reading plus 0.05 NTU Repeatability ±1% of reading of 0.02 NTU, whichever is greater. Stray Light < 0.05 NTU Light Source tungsten filament lamp Light Detector silicon photocell Method ratio nephelometric method Display 60 x 90 mm backlit LCD Calibration two, three or four points LOG Memory 200 records Serial Interface RS 232 or USB 1.1 Environment 0 to 50°C (32 to 122°F); max 95% RH non-condensing Battery Type 1.5V AA batteries (4) / 12 VDC adapter Auto Shut-off after 15 minutes of non-use Dimensions 224 x 87 x 77 mm (8.8 x 3.4 x 3.0”) Weight 512 g (18.0 oz.) Ordering Information HI83749-01 (115V) and HI83749-02 (230V) are supplied with iButton® tags with tag holders (5), sample cuvettes and caps (6), calibration cuvettes (4), bentocheck reagent, silicone oil (HI98703-58), 1000 µL automatic pipette with two tips and instructions sheet, 25 mL glass vials with caps (4), 1 mL syringe with two tips, funnel, filter paper (25), cuvette cleaning cloth, 12 VDC adapter, batteries, instructions and rugged carrying case. Reagents and Standards HI83749-11 Turbidity Calibration Set HI83749-20 Bentocheck Solution * NTU (Nephelometric Turbidity Units) HI83749 Portable Turbidity Meter and Bentonite Monitoring • GLP Features · Meets Good Laboratory Practices • Backlight · Backlit LCD • Connectivity · PC interface via USB Wines with low phenol contents, such as rosé, light reds and whites should be checked for protein stability before bottling. Hanna oers a quick test meter to verify the risk of future protein haze formation. If protein instability is detected, a subsequent test can help dene the right amount of bentonite to be added for improving protein stability. It is important not to overdose bentonite to avoid stripping wine avor, body, and signicant loss of color, especially in young red wines. Moreover, adding only the necessary amount of bentonite to obtain the desired protein stability also saves costs. The HI 83749 measures turbidity of samples from 0.00 to 1200 NTU (Nephelometric Turbidity Units) and is USEPA compliant. In the USEPA measurement mode the instrument rounds the readings to meet USEPA reporting requirements. See page 12.26 for standards and accessories Fast Tracker™ The HI83749 is equipped with Fast Tracker™ Tag Identication System (T.I.S.) that makes data collecting and management simpler than ever. Fast Tracker™ allows users to record the time and location of a specic measurement or series of measurements using iButton® tags near sampling points for quick and easy readings. Each iButton® tag contains a computer chip with a unique identication code encased in stainless steel. 12 Turbidity 12.21 www.hannainst.com | wine applications
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