Hanna Instruments HI 121 - Manual (Page 3)

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The Hanna HI 121 and HI 123 are professional bench meters with two
input channels for pH, ORP (Oxidation Reduction Potential), ISE and
Temperature measurements with Calibration Check.
Relative mV feature is also provided on both channels.
Calibration Check performs a set of diagnostic tests during calibration using
the history of electrode slope and offset to detect problems that can cause
loss of accuracy.
Calibration Check Features are:
• Enhanced Calibration Messages
• Electrode Condition on LCD Display
• Electrode Response Time on LCD Display
• Calibration Alarm Time Out
• Out of Calibration Range
Other features include:
• Up to five-point calibration with seven memorized buffers (1.68, 4.01,
6.86, 7.01, 9.18, 10.01 and 12.45 pH) and two custom buffers.
• pH calibration using pH buffers with 0.001 resolution.
• pH reading with manual or automatic temperature compensation.
• Two Log on demand (up to 50 samples) and Autologging (up to 1000
samples) corresponding to each input channel.
• Two selectable alarm limits.
• User selectable AutoLOG modes.
• Printing feature in four selectable languages (HI 123 only).
• Large easy-to-read LCD which shows the pH or ISE, mV and Temperature
simultaneously, together with graphic symbols.
• AutoHOLD feature to freeze first stable reading on the LCD.
• GLP feature to view last calibration data for pH, ISE and Relative mV.
• PC interface.
Remove the instrument from the packing material and examine it carefully
to make sure that no damage has occurred during shipping. If there is
any damage, notify your Dealer or the nearest Hanna Service Center.
Each instrument is supplied with:
• HI 1131P Glass-body Combination pH Electrode
• HI 7662-T Temperature probe
• pH 4.01 & 7.01 Buffer solutions, 20 mL each
• HI 7071S Electrolyte solution
• 5 paper rolls (HI 123 only)
• 12VDC Power Adapter
• Instruction Manual
Note: Save all packing material until you are sure that the instrument
functions correctly. All defective items must be returned in the
original packing with the supplied accessories.
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