For the measurement of pH the HI98191 comes with a HI72911B titanium body pH electrode with a built-in temperature sensor for automatic temperature compensated readings. The titanium body is chemically resistant to aggressive chemicals and is virtually unbreakable.
Hanna's unique CAL Check™ feature alerts the user to potential problems during the pH calibration process. By comparing previous calibration data to the current calibration the meter will alert the user with display prompts when the probe needs to be cleaned or is broken and if the pH buffer might be contaminated. After calibration the overall probe condition is displayed as a percentage from 0 to 100% in increments of 10%. The probe condition is affected by both the offset and slope characteristics of the pH electrode and is displayed on the measurement screen on the day of calibration and in the GLP data. pH calibration can be performed up to five points with seven preprogrammed standard pH buffers and five custom ones to achieve a pH accuracy of ±0.002 with ±0.001 pH resolution.
The HI98191 has 15 different ISE sensors preprogrammed within the meter. By selecting the appropriate ISE in the ISE Setup Menu, the appropriate ion charge and ion molar weight are applied to display ISE slope percentage. Users can then calibrate up to five points with the choice of six standard values. This meter allows an extensive choice of measurement units (ppm, ppt, g/L, ppb, μg/L, mg/mL, M, mol/L, mmol/L, % w/v, user defined) and has an expanded measuring range of 1.00 x 10-7 to 9.99 x 1010.
Pressing the "AutoHold" virtual key seen in measurement mode, the meter will freeze a stable reading allowing for the reading to be documented or logged. An “out of calibration range” warning can be enabled that will alert the user when a reading is not within the bracket of calibrated pH values.
The log-on-demand mode allows the user to record and save up to 300 samples (100 each for pH, mV, and ISE). This data along with the associated GLP data can then be transferred to a PC with Hanna’s HI920015 micro USB cable and HI92000 software.
Access help at any time at a press of a dedicated button and view content specific information based on the screen that is currently being viewed.
The high contrast graphic LCD is easy to read outdoors in bright sunlight as well in low-lit areas with the backlight. A combination of dedicated and virtual keys allows easy, intuitive operation in a choice of languages.
The compact, durable carrying case is thermoformed to hold all necessary components for taking a field measurement, including the meter, electrode and beakers.
Features/Benefits:
- Ergonomic, rugged, waterproof (IP67) design
- pH CAL Check™
- Alerts user to potential problems during calibration including when to clean electrode and possible buffer contamination.
- Displays overall probe condition based on offset and slope after calibration
ISE direct concentration readout in a choice of concentration units
- Automatic Temperature Compensation
- Five-point pH calibration with seven standard buffers and five custom buffers
- Log-on-demand
- Store measurement data at the press of a button
- AutoHold
- Freezes a stable reading on the display for recording or logging
- GLP features
- GLP data including date, time, calibrated values, slope and offset (pH)
- Calibration timeout to alert the user at a defined interval when the calibration has expired
- Multiple language selection
- 200-hour battery life with battery level displayed on measurement screen
- Menu driven for ease of use with virtual-key extended functionality
- Contextual help at the press of a button
- Backlit, graphic LCD
- Connectivity
- PC connectivity via a sealed opto-isolated micro USB and HI92000 software
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