DO Calibration Points One or two points at 100.0 % (8.26 mg/L) and 0.0 % (0.00 mg/L) Type Automatic Manual (user entered value in % saturation, mg/L, or ppm Reminder Daily: 0 min. to 23 hours and 59 min. Periodic: 1 min. to 30 days, 23 hours and 59 min. Disabled Views Basic Measurement ›DO › Pressure › Temperature (ATC or MTC) Stability status Simple GLP Basic view information DO last calibration date, barometric pressure, offset, average slope Full GLP Simple GLP information and calibration point details Table Measurements updated every second are displayed in table. With Manual logging type, configuration displays table of logged data point Graph (Plot) DO and temperature versus time (pinch-to-zoom for graph pan or zoom) Barometric Pressure Range 450.0 to 850.0 mmHg / 600.0 to 1133.2 mbar / 60.00 to 113.32 kPa 17.72 to 33.46 inHg / 8.702 to 16.436 psi / 0.5921 to 1.1184 atm Resolution 0.1 mmHg / 0.1 mBar / 0.01 kPa / 0.01 inHg / 0.001 psi / 0.0001 atm Accuracy ±3 mmHg within ±15 % from the calibration point ±3 mmHg ±1, least significant digit Compensation Automatic (meter-integrated barometer) Manual Temperature* *Consider probe limits below Range −20.0 to 120.0 °C; −4.0 to 248.0 °F; 253.2 to 393.2 K Resolution 0.1 °C; 0.1 °F; 0.1 K Accuracy Refer to probe used Compensation Automatic or manual Temperature (HI6421 with HI7641133 Optical probe) Range −5.0 to 50.0 °C / 23.0 to 122.0 °F / 268.2 to 323.2 K Resolution 0.1 °C / 0.1 °F / 0.1 K Accuracy ±0.3 °C / ±0.4 °F /±0.2 K Temperature (HI6421P with HI764833 Polarographic probe) Range 0.0 to 50.0 °C / 32.0 to 122.0 °F / 273.2 to 323.2 K Resolution 0.1 °C / 0.1 °F / 0.1 K Accuracy ±0.2 °C / ±0.4 °F /±0.2 K Temperature user calibration 1 point, configurable Salinity Compensation Manual › 0.00 to 45.00 psu or ppt › 0.0 to 130.0 % Logging Type Automatic, Manual, Autohold Number of records 50 000 maximum per file Stores at least 1 000 000 data points per user Automatic interval 1, 2, 5, 10, 30 seconds 1, 2, 5, 10, 15, 30, 60, 120, 150, 180 minutes Sample ID Incremental mode Export option .CSV file format Users Up to 9 users and the default administrator account Connectivity USB-A 2 ports for keyboard input or USB thumb drive USB-C 1 port for PC connectivity and USB-C type thumb drive Wi-Fi & Ethernet FTP Web server Log transfer and download Email RS232 Connecting peripherals Power supply DC adapter 100-240 VAC to 24 VDC 2 A Environment 0 - 50 °C / 32 - 122 °F / 273 - 323 K maximum 95% RH non-condensing Dimensions 205 x 160 x 77 mm (8.0 x 6.2 x 3.0 “) Weight Approximately 1.2 kg (26.5 lbs.) Ordering Information HI6421 is supplied with HI7641133 optical DO probe (opdo®); HI764113-1 Smart Cap™ with O-ring; calibration / storage vessel; syringe, lens wipe, silicone grease (6 g sachet); DO Smart Cap quality certificate; HI764060 electrode holder with following accessories: base plate, cable holder clip (attached), electrode holder with adapter (attached); 24 VDC power adapter: USB-C to USB-A cable: probe quality certificate: instrument quality certificate; quick reference guide. HI6421P is supplied with HI764833 polarographic DO probe; membrane cap with O-ring (2 pcs.); HI7041S electrolyte solution (30 mL); HI764060 electrode holder with following accessories: base plate, cable holder clip (attached), electrode holder with adapter (attached); 24 VDC power adapter: USB-C to USB-A cable: probe quality certificate: instrument quality certificate; quick reference guide. See page 6.32 for DO solutions and accessories; see HI6000180 magnetic stirrer on page page 8.8 6 Dissolved Oxygen 6.13 www.hannainst.com | benchtop
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