Specifications HI9813-51 HI9813-61 (with CAL Check) pH Range 0.0 to 14.0 pH 0.0 to 14.0 pH Resolution 0.1 pH 0.1 pH Accuracy ±0.1 pH ±0.1 pH EC Range 0.00 to 4.00 mS/cm 0.00 to 4.00 mS/cm Resolution 0.01 mS/cm 0.01 mS/cm Accuracy ±2% F.S. ±2% F.S. TDS Range 0 to 1999 ppm (mg/L) 0 to 1999 ppm (mg/L) Resolution 1 ppm (mg/L) 1 ppm (mg/L) Accuracy ±2% F.S. ±2% F.S. Temperature Range 0.0 to 60.0°C 0.0 to 60.0°C Resolution 0.1°C 0.1°C Accuracy ±0.5°C ±0.5°C Additional Specifications TDS Conversion Factor 0.56 to 0.78 ppm = 1 µS/cm (according to TDS 442 curve) 0.56 to 0.78 ppm = 1 µS/cm (according to TDS 442 curve) pH & EC/TDS Calibration manual, one point (all parameters except temperature) manual, one point (all parameters except temperature) Temp. Compensation automatic 0 to 70°C (32 to 158°F) with ȕ=2%/°C (EC/TDS only) automatic 0 to 70°C (32 to 158°F) with ȕ=2%/°C (EC/TDS only) Probe HI1285-51 polypropylene body, pre-amplified multiparameter probe with internal temperature sensor, 8-pin DIN connector and 1 m (3.3’) cable (included) HI1285-61 polypropylene body, pre-amplified multiparameter probe with CAL Check compatibilty, internal temperature sensor, 8-pin DIN connector and 1 m (3.3’) cable (included) Battery Type / Life 9V / approximately 450 hours of continuous use Environment 0 to 50°C (32 to 122°F); RH max 100% Dimensions 145 x 80 x 36 mm (5.7 x 3.1 x 1.4”) Weight 230 g (8.1 oz.) Ordering Information HI9813-51 is supplied with HI1285-51 multiparameter probe, HI70007 pH 7.01 calibration solution sachet, HI70442 1500 ppm (mg/L) calibration solution sachet, HI70031 1413 µS/cm calibration solution sachet, HI700661 electrode cleaning solution sachets (2), battery and instructions. HI9813-61 is supplied with HI1285-61 multiparameter probe, HI70007 pH 7.01 calibration solution sachet, HI70442 1500 ppm (mg/L) calibration solution sachet, HI70031 1413 µS/cm calibration solution sachet, HI50021 calibration check solution sachets (2), HI700661 electrode cleaning solution sachets (2), 9v battery (1), instructions and rugged carrying case. Accessories HI50021P CAL Check solution sachets for HI9813-6, 20mL (25) HI710007 blue shockproof rubber boot HI710008 orange shockproof rubber boot HI7209811 spare carrying case for HI981X-X series HI9813-61 CAL Check™ Feature The HI9813-61’s CAL Check feature alerts users if there is a problem with the pH electrode. This feature is important for customers that calibrate only to pH 7.0; if there is a fracture on the pH glass of the electrode, the pH meter will always display pH 7.0 regardless of the solution being measured. This can be disastrous for the person that calibrates at pH 7.0 and takes readings of samples with an expected pH of 7.0. The user will never be aware that there is a problem. Placing the HI1285-61 pH/EC electrode in HI50021 CAL Check solution and pressing the “Check” button helps users determine if the probe needs to be calibrated, cleaned or replaced. The meter runs CAL Check diagnostics and will display either “Probe is OK” or “Clean Probe and Calibrate”. If the reading is around pH 4.0 when the probe is placed in the solution then the probe is broken and needs to be replaced. HI1285 series probes These meters are supplied with a polypropylene body pH/EC/TDS/temperature probe. The pH, EC, TDS, and temperature sensor are housed in a single body that connects to the meter with a DIN connector. • 3 sensors in a single probe • Amplified pH electrode · The pH electrode circuit has a built-in amplifier that will reduce the effects of electrical noise on the high impedance pH measurement. Examples of sources of electrical noise include motors, ballasts, and pumps which are common in greenhouses. • Amperometric EC/TDS sensor · The EC/TDS readings are performed by an amperometric sensor. An alternating voltage is applied to the sensor and the amount of current that passes between the two stainless steel pins is dependent upon the amount of salts (fertilizer) present. A greater amount of salt present results in an increase in conductance. • Polypropylene body · The polypropylene body houses all the sensors in a single body design and is durable. The probe is gel filled for maintenance free operation. It does not have to be refilled periodically. pH solutions begin on page 2.164; EC and TDS solutions begin on page 5.34; See page 7.86 for probe specifications 7 Multiparameter 7.83 www.hannainst.com | portable
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