User manual HANNA INSTRUMENTS HI 2223

[. . . ] Instruction Manual HI 2221 HI 2223 pH/mV/ºC Bench Meters 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 these instruments. This manual will provide you with the necessary information for correct use of these instruments, as well as a precise idea of their versatility. [. . . ] 27 dated July 14): If there are less than 5 memory locations remaining, the record number and the "Lo" message will be displayed to alert the user. If the log space is full, the "FULL LOG" message will be displayed and no more data will be saved. Along with the current measurement, the date, time, mV value, temperature and calibration data is stored. If a HANNA P Type ORP electrode is used pH information is not stored. VIEW LOGGED DATA Press RCL while in measurement mode to retrieve the stored information. If no data was logged, the instrument displays: The instrument will display the logged measurement value on the primary LCD and the record number on the secondary LCD, along with the "LOG" and "RCL" tags. Note: The "LOG" and "RCL" tags remain on LCD while in memory recall mode. 21 Press the RCL key to return to measurement mode. Use the ARROW keys to scroll through the stored records: Press the RANGE key to view additional data: · The mV value on the primary LCD and the temperature on the secondary LCD. · The year on the primary LCD and the month and day on the secondary LCD. · The hour and minutes on the primary LCD and the record number on the secondary LCD. · The calibration offset on the primary LCD and the "oFFS" message on the secondary LCD. · The calibration slope on the primary LCD and the "SLoP" message on the secondary LCD. Note: On the screens where record number is not displayed press the SETUP key to display the record number. · To delete records press CLR key. The "dEL" message will be displayed on the primary LCD and the selected record on the secondary LCD. The "CFM" and the "DEL" tags will blink: 22 Press the ARROW keys to change the selected record. To delete all records press the SETUP key, "ALL" tag will appear on the secondary LCD. Press the CFM key to confirm the deleting of the selected record, or all records. Instrument will display on the primary LCD the "nuLL" message. LOG RCL Notes: · The RANGE key has no effect if "nuLL" record message is displayed on the first LCD line. · You can skip this message by selecting an undeleted record using the ARROW keys. · 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 23 SETUP Setup mode allows viewing and modification of the following parameters: · Calibration Expiration Alarm · One-point Calibration Behavior · pH Resolution (HI 2223 only) · 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. [. . . ] The pH electrode's life also depends on the temperature. 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. [. . . ]