Last Calibration Data - Hanna Instruments HI21 Series Instruction Manual

LAST CALIBRATION DATA

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The meter stores the following information about last cali-
bration in the EEPROM:
• Date
• Time
• Offset in mV (for HI21 only)
• Up to two slopes (for HI21 only)
• Up to three buffers
While displaying this data, the pH controller remains in
control mode.
The procedure below indicates the flow for a three-point
calibration. The sequence will vary if fewer calibration points
are used (e.g. for a one-point calibration the following data
will be displayed: date, time, offset, first slope, buffer 1
value). For the HI22, last calibration data includes date and
time of calibration and the values of the 2 calibration points.
Displaying of these items follows the above sequence.
• To begin the cycle press CAL DATA. The last calibration
date will appear on the main LCD display as DD.MM
format, while the secondary display will show the year.
If the meter has never been calibrated or an EEPROM
reset has occurred, no calibration data is shown when
CAL DATA is pressed. The "no CAL" message will blink
for a few seconds, then the meter skips back to normal
mode.
• Pressing  will cycle through the following steps in reverse
order, i.e. last buffer.