HI 255 HANNA\\

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HI 255 HANNA'PH/EC/TDS/TEMP/NaCl' HI 255 is a high performance precision instrument that measures a multitude of parameters, each over a wide range. With this single laboratory bench meter you can measure pH, ORP, conductivity, TDS, NaCl percentage and temperature. Utilizing an external temperature probe, pH readings are automatically temperature compensated. pH calibrations are customizable - up to 3 reference points, chosen from the 5 available memorized buffers - to ensure a higher level of precision. EC measurements can be compensated relative to a selected reference temperature of 20 or 25°C. The EC calibration mode allows you to chose from among 6 memorized buffers and performed at single-point calibration. The most suitable EC and TDS range for your application is automatically selected. With a built-in logging function, measurements are stored in non volatile memory, and can be downloaded to a PC through the RS232 serial port. In addition to these features, HI 255 is contains GLP features that store the calibration and measurement data of any sample, to be displayed upon request. Range pH/ORP -2.00 to 16.00 pH; -2.000 to 16.000 pH / ±699.9 mV; ±2000 mV Range EC 0.00 to 29.99 µS/cm; 30.0 to 299.9 µS/cm; 300 to 2999 mS/cm 3.00 to 29.99 mS/cm; 30.0 to 200.0 mS/cm; up to 500.0 mS/cm actual EC* Range TDS 0.00 to 14.99 ppm; 15.0 to 149.9 ppm; 150 to 1499 ppm; 1.50 to 14.99 g/L; 15.0 to 100.0 g/L; up to 400.0 g/L actual TDS* Range NaCl 0.0 to 400.0% NaCl Range Temperature -10 to 120.0°C (pH); 0.0 to 60.0°C (EC) Resolution pH/ORP 0.01 pH; 0.001 pH / 0.1 mV (±699.9 mV); 1 mV (±2000 mV) Resolution EC 0.01 µS/cm; 0.1 µS/cm; 1 µS/cm; 0.01 mS/cm; 0.1 mS/cm Resolution TDS 0.01 ppm; 0.1 ppm; 1 ppm; 0.01 g/L; 0.1 g/L Resolution NaCl 0.1% NaCl Resolution Temperature 0.1°C Accuracy pH/ORP ±0.01 pH; ±0.002 pH / ±0.2 mV (±699.9 mV); ±1 mV (±2000 mV) Accuracy EC ±1% of reading ±(0.05 µS/cm or 1 digit) Accuracy TDS ±1% of reading ±(0.03 ppm or 1 digit) Accuracy NaCl ±1% of reading Accuracy Temperature ±0.4°C (excluding probe error) Relative mV Offset Range ±2000 mV Calibration pH automatic, at 1, 2 or 3 points, with 5 memorized buffers (4.01, 6.86, 7.01, 9.18, 10.01) Calibration EC automatic, 1 point, with 6 memorized values (84.0 and 1413 µS/cm; 5.00, 12.88, 80.0 and 111.8 mS/cm) Calibration NaCl automatic, 1 point, with HI 7037L calibration solutions Temperature Compensation manual or automatic, -10.0 to 120.0°C (14 to 248°F) for pH; 0.0 to 60.0°C (32 to 140°F) for EC; (can be diabled for measuring actual EC and TDS values) Temperature Coefficient 0.00 to 6.00%/°C (EC and TDS only); default value: 1.90%/°C TDS Conversion Factor 0.40 to 0.80; default value: 0.50 pH Electrode HI 1131B (included) EC Probe HI 76310 (included) Temperature Probe HI 7662 (included) PC Connection RS232 opto-isolated serial port Data Logging 200 samples Input Impedance 1012 Ohm Power Supply 12 Vdc adapter (included) Environment 0 to 50°C (32 to 122°F); RH max 95% Dimensions 240 x 182 x 74 mm (9.4 x 7.2 x 2.9') Weight 1.1 kg (2.4 lb.) ACCESSERIE Electrodes HI 11X1 Series Laboratory Combination pH and ORP Electrodes HI 76310 4-Ring Potentiometric Probes HI 7662 Temperature Probe Solutions HI 7004L 4.01 pH Buffer Solution 1 x 500 mL bottle HI 7007L 7.01 pH Buffer Solution 1 x 500 mL bottle HI 7010L 10.01 pH Buffer Solution 1 x 500 mL bottle HI 77400P Combination pH Buffer Kit 4.01 & 7.01 pH HI 7071 Electrolyte Solution, 3.5M KCl + AgCl 4 x 30 mL bottles HI 70300L Electrode Storage Solution 1 x 500 mL bottle HI 7030L 12880 µS/cm (µmho/cm) 1 x 500 mL bottle HI 7031L 1413 µS/cm (µmho/cm) 1 x 500 mL bottle HI 7033L 84 µS/cm (µmho/cm) 1 x 500 mL bottle HI 7034L 80000 µS/cm (µmho/cm) 1 x 500 mL bottle HI 7035L 111800 µS/cm (µmho/cm) 1 x 500 mL bottle HI 7037L Calibration solution for % Readings (100% NaCl) 1 x 500 mL bottle Accessories HI 710005 Voltage adapter from 115V to 12 Vdc (USA plug) HI 710006 Voltage adapter from 230V to 12 Vdc (European plug) HI 920010 Cable for PC Connection, 9 to 9-pin HI 92000 Windows® Compatible Software for Logging Instruments, Photometers and Turbidity Meters HI 76404 Electrode Holder