User manual HANNA INSTRUMENTS HI 2222

[. . . ] Instruction Manual HI 2222 pH/mV/ºC Bench Meter with Calibration Check w w w. c o m 1 Dear Customer, Thank you for choosing a Hanna Instruments product. Please read this instruction manual carefully before using this instrument. This manual will provide you with the necessary information for correct use of this instrument, as well as a precise idea of its versatility. [. . . ] · The instrument optimizes the usage of the memory when it returns to measurement mode after a deleting operation is performed. This will change the record numbers of logged data. During this operation the " " tag will blink. · If all the records are deleted the instrument returns to the measuring mode. · After the LOG key is pressed or "dEL" is confirmed the instrument will display the amount of free log space for about one second (example: 25 records free). LOG 21 SETUP Setup mode allows viewing and modification of the following parameters: · Calibration Expiration Alarm · Current Time (hour & minute) · Current Date (year, month & day) · Beep Status · Instrument ID · Temperature Unit To enter the Setup mode press the SETUP key while the instrument is in measuring mode. Press the CAL key to change a parameter value. The selected parameter will start blinking. Press the RANGE key to toggle between the displayed parameters. Press the ARROW keys to increase or decrease the displayed value. Press the CFM key to save the modified value or the CAL key to escape without saving. CALIBRATION EXPIRATION ALARM Press the CAL key when the calibration expiration is displayed. Calibration time out ("OFF" or "1" to "7" days) will begin blinking. Press the ARROW keys to change the calibration expiration value. Press the CFM key to save the modified calibration expiration value or press the CAL key to cancel without saving the calibration expiration. CURRENT TIME Press the CAL key when the current time is displayed. The hour will start blinking. Press the ARROW keys to change the hour. The minutes will start blinking. 22 Press the ARROW keys to change the displayed value. Press the CFM key to save the modified value or press the CAL key to escape without saving. CURRENT DATE Press the CAL key when the current date is displayed. The year will start blinking. Press the ARROW keys to change the year. The month will start blinking. Press the ARROW keys to change the month. The day will start blinking. Press the ARROW keys to change the day. Press the CFM key to save the modified value or press the CAL key to escape without saving. [. . . ] If constantly used at high temperatures, the electrode life is drastically reduced. Typical Electrode Life Ambient Temperature 1 ­ 3 years 90 ºC Less than 4 months 120 ºC Less than 1 month Alkaline Error High concentrations of sodium ions interfere with readings in alkaline solutions. The pH at which the interference starts to be significant depends upon the composition of the glass. This interference is called alkaline error and causes the pH to be underestimated. [. . . ]