Hanna-instruments HI 9910 Manual de usuario descargar pdf (Pagina 25)

650

Using a small screwdriver, adjust the “ALKALINE SET” trimmers. First

adjust the “COARSE” trimmer and then fine tune with the “FINE”

trimmer (see 3 and 4 - Functional Diagram) until the desired set

value is displayed (e.g. pH 5.00).

NOTE:

• The “FINE” trimmer can adjust up to ±1.5 pH.

• Should you use the HI 9911

for a single-point dosage, it is

recommended to adjust the “ALKALINE SET” trimmers to 0.00 pH

if you are dosing acid solutions to lower the pH and adjust the

“ACID SET” trimmers to your desired values. Likewise, when

dosing only base solutions, set the “ACID SET” trimmers to 14.00

pH and adjust the “ALKALINE SET” trimmers to your desired

value.

FOR HI 9920

Turn the switch to the "SET" position (see 7 - Functional Diagram).

The display will show the previously adjusted value (e.g. mV 650).

Using a small screwdriver, first adjust the setpoint through the

“COARSE” trimmer and then fine tune it with the “FINE” trimmer (see

3 and 4 - Functional Diagram) until the desired set value is

displayed (e.g. mV 700).

SET

READ

COARSE FINECAL

ORP

SET POINT

680

COARSE FINECAL

ORP

SET POINT

700

COARSE FINE SLOPEOFFSET

ALKALINE SET

ACID SET

COARSE FINE SLOPEOFFSET

ALKALINE SET

ACID SET

5.18 5.00

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Hanna-instruments HI 9910 Manual de usuario Pagina 25