24
CALIBRA
TION
At the end of the measurement, the four-point calibration is memorized and the instrument
automatically returns to measurement mode.
750
FNU
100
FNU
11.3. OUT CAL RANGE FUNCTION
Recommended calibration range for correct measurements is up to 40 FNU for two-point calibration
and up to 150% of the third point value for three-point calibration.
LCD displays a blinking CAL tag each time measurements are taken outside the calibration range.
11.4. CALIBRATION ERRORS
• “- LO -” or “- HI -” message indicates that the read value is too far from the set value.
• “CAL Err” message indicates that calculated calibration coefficients are outside a certain range.
11.5. DELETE CALIBRATION
HI987134
is factory calibrated.
To delete the last performed calibration:
1. Press GLP
. The date of last calibration is displayed.
2. Press READ
to see calibration information.
3. Press SETUP/DEL to delete the current calibration.
The instrument automatically returns to measurement mode.