Hanna-instruments HI 9910 Manual do Utilizador descarregar pdf (Página 20)

SET

READ

4cm

(1½")

HI 7007

Temp. compensation

selector

ATCMTC

MTC

°C

-10

Make sure that the pH electrode and any ground probe have been

properly connected and wired to the controller (see preceding pages)

and that the meter is plugged to the mains.

Calibration should be ideally performed at a temperature similar to

that of the liquid to be monitored.

Use a Checktemp (or an accurate thermometer)

as reference for temperature compensation.

Remove the electrode cap if it is still on the

electrode.

During calibration, move the electrode and the

separate ground probe (if in use) together from

one buffer to the next.

If no separate ground probe is being used, make sure

that the Reference and the Matching Pin terminals are

shorted (see 14 - Functional Diagram).

If the electrode incorporates a ground probe/matching pin (HI 1003/3)

then remove the jumper.

• Turn the switch to the "READ" position.

OFFSET ADJUSTMENT:

• Rinse the tip of the electrode with pH

7.01 solution (HI 7007), then dip the

bottom 4 cm (1.5”) of the electrode (and

ground probe) in the pH 7.01 buffer.

• Place the Checktemp thermometer in the buffer solution. Turn the

dial (see 10 - Functional Diagram) to show the same temperature

pH pH

CALIBRATIONCALIBRATION

CALIBRATION

(HI 9910 and HI 9911)

4cm

(1½")

HI 7007

4cm

(1½")

HI 7007

1 2 ... 15 16 17 18 19 20 21 22 23 24 25 ... 39 40

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