Hanna Instruments HI 84429 - Manual (Page 22)

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• If the computed slope isn’t within the preset limits the meter will display the message
“Wrong Slope”. If the slope is too high the symbol will be displayed. If the slope is
too low the symbol will be displayed.
• If the “Wrong Old Slope” error message is displayed, an inconsistency exists between the
current and the previous (old) calibration. Clear the calibration parameters by pressing Clear
and proceed with calibration from the current calibration point. The instrument will keep all
the confirmed values during the current calibration point.
• If the temperature reading is out of the defined temperature range of the buffer (0÷45 °C)
the “Wrong Buffer Temperature” error message will be displayed, and the symbol °C will
blink on the dsplay. Calibration cannot be confirmed in this situation.