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LAST CALIBRATION DATA
The meter stores the following information about last cali-
bration in the EEPROM:
• Date
• Time
• Offset in mV (for pH500 only)
• Up to two slopes (for pH500 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 mV600, 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 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.
