17
• Wait for the reading to stabilize and
then adjust the “OFFSET” trimmer
to display the buffer pH value at the
measured temperature, e.g. pH7.01
if the temperature is 25 °C (77 °F).
• Refer to the table at page 25 for the appropriate buffer value at a
given temperature, and adjust the trimmer accordingly.
SLOPE ADJUSTMENT:
• Rinse the electrode (and ground probe)
thoroughly with water and immerse the
tip(s) in pH4.01 (
HI7004
) or pH10.01
(
HI7010
) buffer solution. An immersion
level of about 4 cm (1.5”) is recom-
mended.
Note:
Use pH4.01 if monitoring acidic solutions; use pH10.01 for
alkaline samples.
• Stir the electrode and wait for the display to stabilize before
adjusting the “SLOPE” trimmer to display the buffer pH value
at the measured temperature, e.g. pH4.01 (or pH10.01) if the
temperature is 25 °C (77 °F).
• Refer to the table at page 25 for the appropriate buffer value at a
given temperature, and adjust the trimmer accordingly.
The pH calibration is now complete.
