Instruction manual

8
4. CALIBRATION
4.1. Important Information on Meter Calibration
When you recalibrate your meter, old pH and conductivity calibration data are replaced on a
point by point basis. For example, if you previously calibrated your meter at pH 4.0, 7.0, and
10.0, and you recalibrate at pH 7.0, the meter retains the old calibration data at pH 4.0 and pH
10.0.
To completely recalibrate your meter, or when you
use a replacement probe, it is best to set the meter
to its factory defaults and recalibrate the meter at all
points.
To reset the meter to its factory defaults:
1. While in Measurement mode, press
CAL/MEAS and hold for 3 seconds.
2. The meter will prompt RST in the lower display
and CAL in the upper display. See Figure 8.
3. Press ENTER to reset your meter to its factory
defaults. If you do not want to erase existing
calibration data, press CAL/MEAS to escape this
mode.
For information on how to calibrate your meter:
See Section 4.3 on pages 9 - 11 for pH calibration.
See Section 4.4 on pages 12 – 14 for conductivity calibration.
See Section 4.5 on pages 15 – 16 for temperature calibration.
Figure 8 - Reset to factory defaults