User Guide

10
mV CALIBRATION
Contact your nearest Hanna Service Center for periodic mV calibration.
It is recommended to have the meter recalibrated for mV reading at
least every two years.
TEMPERATURE CALIBRATION
(for technical personnel only)
Contact your nearest Hanna Service Center for periodic temperature
calibration.
It is recommended to have the meter recalibrated for temperature
reading at least every two years.
Temperature calibration at your site should be performed only by
skilled technical personnel as described in the following procedure
(two-point calibration at 0.0 and 50.0°C):
1. Immerse the pH electrode with the built-in temperature sensor in
a 0°C ice bath.
2. Press (ALT+) CALT to enter temperature calibration mode.
3. Enter the password.
4. The meter will display "0.0°C" on the secondary LCD with the
"BUF 1" and "CAL" indications.
5. When the reading is stable the "CFM" tag starts blinking.
6. Press CFM to confirm. The secondary LCD will then display
"50.0°C" with the "BUF 2" indication.
7. Immerse the pH electrode with the built-in temperature sensor in
a 50°C bath.
8. When the reading is stable the "CFM" tag starts blinking.
9. Press CFM to confirm, save the new calibration data and return to
normal mode.
Note: To abort the calibration procedure and leave the calibration data
unchanged, press (ALT+) CALT at any time before the last step.