Hanna Instruments HI 8510 - Manual (Page 17)

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When acid dosage is active,
the ACID LED lights up, while
during alkaline dosage, the
BASE LED turns on (HI 8710
only).
When oxidant dosage is active,
the OXID LED lights up, while
during reductant dosage, the
REDUC LED turns on (HI 8720
only).
SLOPE DOSAGE
ACID BASE
Δ AL
COARSE
SET
FINE
MEA
SURE SET
SLOPE DOSAGE
OXID. REDUC.
Δ AL
COARSE
SET
FINE
MEA
SURE SET
Examples:
For HI 8710, if the set value is pH 3 and the
Δ
Alarm is 1.5 pH, the instrument generates
an alarm every time the pH reading is higher
than 4.5 pH or lower than 1.5pH.
For HI 8711, if the set values are pH 7 and
pH 8, and the
Δ
Alarm is 1.5 pH, the instru-
ment generates an alarm every time the pH
reading is higher than 9.5 pH or lower than
5.5 pH.
For HI 8720, if the set value is 300 mV and the
Δ
Alarm is 100 mV, the instrument generates an
alarm every time the ORP reading is higher than
400 mV or lower than 200 mV.
MEASUREMENTS
After setting the pH (or ORP)
and alarm (if available)
thresholds, immerse the elec-
trode in the solution to be
tested and press MEASURE.
The actual pH or ORP value of the test solu-
tion is displayed.
COARSE
SET
FINE
MEA
SURE
Δ AL
Δ AL
pH
pH mV