Hanna Instruments HI 221 - Manual (Page 21)

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•The “dEL” message on the primary LCD and the selected record or date on
the secondary LCD. The “CFM” and the ”DEL” tags will blink:
Press SET key to select the current record, the records from the selected date or
all records to be deleted.
the date.
or “ALL” records.
Press the ARROW keys to change the record or the date.
Press the CFM key to confirm the deleting of the selected record, all the records
for the selected date, or all the records and the instrument will display on the
secondary LCD the “nuLL” message.
Note:• Pressing RANGE key the instrument skips to the pH information on
the next undeleted record.
• 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.
• 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 RCL
LOG