Theory The Hanna HI764113 optical DO sensing probe is based on the principle of ¦uorescence quenching. The sensing method features an immobilized Pt based luminophore that is excited by the light of a blue LED and emits a red light. Dissolved oxygen quenches this excitation. When there is no oxygen present, the lifetime of the signal is the greatest; as oxygen hits the sensing surface, the lifetime becomes shorter. The intensity and lifetime are inversely proportional to the amount of oxygen present; as oxygen interacts with the luminophore it reduces the intensity and lifetime of the luminescence. The lifetime of the luminescence is measured by a photodetector, and is used to calculate the dissolved oxygen concentration. This is in turn reported by the meter as a % saturation or mg/L reading of Dissolved Oxygen. The major components of the probe include a blue LED for excitation, a red LED that is used as a reference light, and a photodetector. The Smart Cap™ is locked in place on the optical probe and includes the immobilized O¬ sensitive luminophore with rugged insoluble black oxygen permeable protective layer. Over time, the sensor’s optical components can age but are compensated for by using the reference signal to compensate the measuring path. As a result, the sensor provides accurate DO measurements over long periods of time without the need for frequent calibration. Specifications HI98198 Dissolved Oxygen Range 0.00 to 50 mg/L (ppm); 0.0 to 500.0% saturation Resolution 0.01 mg/L (ppm); 0.1% saturation Accuracy (@25°C/77°F) 1.5% of reading ± 0.01mg/L for 0.00-20.00mg/L; 5% of reading for 20.00-50.00mg/L; 1.5% of reading ±0.1% for 00-200.0%; 5% of reading for 200.0-500.0% Calibration one or two points automatic calibration at 100% (8.26 mg/L) and 0% (0 mg/L); Single point manual using a value entered by the user in % saturation or mg/L Barometric Pressure Range 420 to 850 mmHg Resolution 1 mmHg Accuracy (@25°C/77°F) ±3 mmHg within ±15% from the calibration point Calibration single point anywhere within pressure range Temperature Range -5.0 to 50.0°C (23 to 122°F) Resolution 0.1°C (0.1°F) Accuracy (@25°C/77°F) ±0.3°C (±0.4°F) Calibration single point anywhere within temperature range Additional Specifications Temperature Compensation automatic from -5.0 to 50.0°C (23.0 to 122.0°F) Pressure Compensation automatic from 420 to 850 mmHg Salinity Compensation automatic from 0 to 70 PSU (manually set) Probe HI764113 optical DO probe with stainless steel, weighted protective sleeve, internal temperature sensor, 7-pin DIN connector and 4m (13’) cable (included) Logging On demand with 4000 records capability Battery Type / Life 1.5V (4) AA batteries / approximately 200 hours of continuous use without backlight (50 hours with backlight) Auto-off user-selectable: 5, 10, 30, 60 min or disabled PC Connectivity USB Type-C Dimensions 185 x 93 x 35.2 mm (7.3 x 3.6 x 1.4”) Weight (with batteries) 450 g (15.9 oz.) Case Ingress Protection Rating IP67 Environment 0 to 50 °C (32 to 122 °F) max. RH 100% Ordering Information HI98198 is supplied with HI764113 Optical DO probe with built-in temperature sensor, protective shield and 4 m (13.1') cable, HI764113-1 Smart Cap™ with o-ring, HI7040 Bicomponent Zero Oxygen Solution, Calibration/storage vessel, 100 mL plastic beaker (2), 1 syringe with silicon grease, 1 lens wipe, 1.5V AA batteries (4), Instruction manual, meter quality certificate, probe quality certificate, cap quality certificate, HI920016 USB Type A to C cable in a rugged carrying case. HI98198/10 is supplied with HI764113/10 Optical DO probe with built-in temperature sensor, protective shield and 10 m (32.8') cable, HI764113-1 Smart Cap™ with o-ring, HI7040 Bicomponent Zero Oxygen Solution, Calibration/storage vessel, 100 mL plastic beaker (2), 1 syringe with silicon grease, 1 lens wipe, 1.5V AA batteries (4), Instruction manual, meter quality certificate, probe quality certificate, cap quality certificate, HI920016 USB Type A to C cable in a rugged carrying case. Accessories HI710034 orange protective rubber boot HI720198 spare carrying case for HI98198 microseconds A. 0% O saturation A B. 100% O saturation B C. 500% O saturation C intensity Luminophore emissions of three oxygen measurements after pulsed blue light excitation. Rugged custom carrying case The HI98198 meter, probe, and all accessories are supplied in a rugged carrying case designed to provide years of use. The inside compartment of the carrying case is thermoformed to securely hold and protect all of the components. • Optional shockproof silicon rubber boot · Specially designed to protect your instrument from damage or impact HI710034 Orange 6 Dissolved Oxygen 6.24 | www.hannainst.com portable
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