Research Grade Meter with Calibration Check
pH/ORP and Temperature
pH Calibration Check™
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).
|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|
|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|
|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|
|Display||color graphic LCD with on-screen help, graphing, language selection and custom configuration|
|PC Connection||USB and RS232|
|Power Supply||12 VDC adapter (included)|
|Environment||0-50ÂºC (32 to 122ÂºF) (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.)|