42
ORP CALIBRATION
Make sure you are in the mea-
surement mode (MEASURE
LED light is on) and not in the
set mode before proceeding with
the calibration (not for HI 8512).
Immerse the electrode in
HI 7020 ORP solution.
Adjust the slope trimmer until an ORP value
of between 200 mV and 250 mV is displayed.
The calibration is now complete and the in-
strument is ready for use.
COARSE
SET
FINE
MEA
SURE
SLOPEDOSAGE
OXID. REDUC.
COARSE
SET
FINE
MEA
SURE
SET
mV
4 cm
(1
½
")
HI 7020