HI4221-01 is a research grade pH, ORP and temperature benchtop meter.HI4221-01 supplied with 12 VDC/115 VAC adapter HI4221-01 Research Grade Meter with Calibration Check™ pH/ORP and Temperature supplied with 12 VDC/115 VAC adapter pH Calibration Check™ User customizable interface for one channel Fully customizable Large log memory with different logging methods HI 4221 is a research grade pH, ORP and temperature benchtop meter. The user interface of HI 4221 is fully customizable, and it is capable of showing the measurements in various modes: basic measurement with or without GLP information, graph or logging data. This instrument offer multi-language support and contextual help is available through a dedicated Help key. Clear tutorial messages and directions are available on-screen to quickly and easily guide users through all measurement and calibration procedures to ensure measurements and calibrations are performed properly. HANNA’s exclusive Calibration Check™ diagnostics system ensures accurate pH readings every time by alerting users of potential problems during the calibration process. The Calibration Check™ system eliminates erroneous readings due to dirty or faulty pH electrodes or contaminated pH buffer solutions during calibration. After the guided calibration process, the electrode condition is evaluated and an indicator is displayed informing the user of the overall pH electrode status. Automatic, semiautomatic and manual pH calibration is available in up to five points, with 8 standard (1.68, 3.00, 4.01, 6.86, 7.01, 9.18, 10.01 and 12.45) and up to 5 custom buffers. The Out of Calibration Range and Cal Due features alert the user in the event the measurement is far from the calibration point or when the meter is due for recalibration. Proper, scheduled calibrations are crucial for accurate and repeatable measurements. Up to 10 profiles can be saved and recalled, eliminating the need to reconfigure each time when a different electrode is used. User definable configurations can include: temperature compensation modes in accordance with each parameter. Three selectable logging modes are available: Automatic, Manual and AutoHold logging. Up to 100 logging lots with 10,000 records each can be stored for automatic or manual mode. Automatic logging features a selectable area and sampling period while GLP information includes complete data about user calibration of each parameter and identification information for the instrument, user, and company. Data can be transferred to a PC via the opto-isolated RS232 or USB ports and HI 92000 software (optional). Specifications: pH Range -2.000 to 20.000 pH Resolution 0.1 pH; 0.01 pH; 0.001 pH Accuracy @ 20°C ±0.1 pH; ±0.01 pH; ±0.002 pH ±1 LSD ORP Range ±2000 mV Resolution 0.1 mV Accuracy @ 20°C ±0.2 mV ±1 LSD Temperature Range -20.0 to 120°C; -4.0 to 248.0°F; 253.15 to 393.15 K Resolution 0.1°C; 0.1°F; 0.1K Accuracy @ 20°C ±0.2°C; ±0.4°F; ±0.2K (without probe) pH Calibration automatic, up to five point calibration, eight standard buffers available (1.68, 3.00, 4.01, 6.86, 7.01, 9.18, 10.01, 12.45), and 5 custom buffers pH Calibration Check yes Relative mV Offset Range ±2000 mV Input Channel 1 pH/ORP GLP cell constant, reference temperature/coefficient, calibration points, cal time stamp, probe offset for conductivity pH Temperature Compensation automatic or manual from -20.0 to 120.0°C/-4.0 to 248.0°/253 to 393K pH Electrode HI 1131B glass body pH electrode with BNC connector and 1 m (3.3’) cable (included) Temperature Probe HI 7662-T stainless steel temperature probe with 1 m (3.3’) cable (included) Logging Record 100 lots with 10,000 record/lot Interval settable between one and max log time Type automatic, log on demand, auto HOLD Replatinization yes Display color graphic LCD with on-screen help, graphing, language selection and custom configuration PC Connection USB and RS232 Power Supply 12 VDC/115 VAC adapter (included) Environment 0-50ºC (32 to 122ºF) (273 to 323K) RH max 95% non-condensing Dimensions 160 x 231 x 94 mm (6.3 x 9.1 x 3.7”) Weight 1.2 Kg (2.64 lbs.) Hanna HI4221-02 ORP Meter pH Meter Temperature à¤Ã×èͧÇÑ´¡Ã´ ´èÒ§ à¤Ã×èͧÇÑ´¤èÒ¾Õàͪ