User Guide

17
confirm the second calibration point.
• If the buffer is out of the slope range, "E2"
as error message will appear on the sec-
ondary display. Press the CAL key and
recalibrate the value.
• If everything is satisfactory
the secondary LCD will blink
"4" (if previously was "10")
or "10" (if previously was
"4") expecting the third
buffer (HI7004/HI8004 or
HI7010/HI8010).
Note: if a two-point calibra-
tion is required, press
the CAL key to leave
the calibration mode
now.
• Rinse the electrode with some pH 4.01 (or
pH 10.01) solution. Dip the bottom 4 cm
(1½") of the electrode in a beaker contain-
ing the third buffer.
• When "4" (or "10") stops blinking, indicat-
ing that the electrode has stabilized, press
the CFM key again to confirm the third
CFM
CAL
CAL
4 cm
(1½
")
HI 7004