HI 98186 Dissolved Oxygen and BOD Meter xtended DO range up to 50 ppm and 600% saturation Built-in barometer Salinity, pressure and temperature compensation Backlit, graphic LCD display Calibration reminder Log on demand (400 samples) Auto HOLD GLP features PC connectivity via USB HI 98186 portable Dissolved Oxygen Meter has extended ranges of up to 50 ppm or 600% saturation. This instrument includes barometric pressure measurement and calibration with a user selectable unit (mmHg, atm, mbar, psi, kPa) as well as a 1 or 2 point temperature calibration. Salinity, pressure and temperature compensations enhance the precision of your readings. With its internal barometer, the instrument is able to automatically compensate for changes in barometric pressure so there is no need for charts, altitude information or external barometric pressure information. Salinity compensation in water allows direct determination of dissolved oxygen in saline waters. Other features include measurement and methods for BOD (biochemical oxygen demand), OUR (oxygen uptake rate), and SOUR (specific oxygen uptake rate). The HI 98186’s log on-demand features allows users to store up to 400 samples that can be later transferred to a PC with the HI?920013 USB cable and HI 92000 software. An “Out Of Calibration Range Warning” can be activated to alert the user in the event that a reading is taken too far from the calibration's periphery. A combination of dedicated and soft keys allows easy, intuitive operation in a choice of languages. Comprehensive GLP data is directly accessible by pressing the GLP key and a contextual Help menu can be access to obtain on-screen information and assistance about each feature at the touch of a button. Designed for field use, this instrument can be easily operated with one hand and is housed in a rugged carrying case. The inductive charger can either be plugged into a standard 115V socket with the adapter included or a 12 VDC source, such as a car's 12 V accessory outlet. Specifications: Range DO 0.00 to 50.00 mg/L (ppm); 0.0 to 600.0 % saturation Barometric Pressure 450 to 850 mmHg Temperature -20.0 to 120.0°C (-4.0 to 248.0°F) Resolution DO 0.01 mg/L (ppm); 0.1% saturation Barometric Pressure 1 mm Hg Temperature 0.1°C/°F Accuracy (@20°C) DO ±1.5% of reading ±1 digit Barometric Pressure ± 3 mmHg within ±15% from the calibration point Temperature ±0.2°C/±0.4°F (excluding probe error) Measurement Modes direct DO; BOD (biochemical oxygen demand); OUR (oxygen uptake rate); SOUR (specific oxygen uptake rate) Calibration DO automatic one or two point at 100 % (8.26 mg/L) and 0 % (0 mg/L).; manual one point using a value entered by the user in % saturation or mg/L Barometric Pressure one point at any in range pressure value Temperature one or two point at any in range temperature value Compensation Barometric automatic from 450 to 850 mmHg Salinity automatic from 0 to 70 g/L Temperature automatic from 0.0 to 50.0 ºC (32.0 to 122.0 ºF) Probe HI 76407/4F polarographic DO probe with protective sleeve, internal temperature sensor, DIN connector and 4m (13’) cable (included) Logging log on demand, 400 samples PC Connection opto-isolated USB (with HI?92000 software) Battery Type / Life 1.2V (4) AA rechargeable batteries/approximately 200 hours of continuous use without backlight Auto-off user selectable: 5, 10, 30, 60 min or can be disabled Environment 0 – 50 ºC (32 – 122 ºF) RH max 100% Dimensions 226.5 x 95 x 52 mm (8.9 x 3.75 x 2”) Weight 525 g (1.1 lbs.) DO Meter Hanna HI98186 à¤Ã×èͧÇÑ´ DO à¤Ã×èͧÇÑ´ÍÍ¡«Ôਹ