Hanna-instruments HI 9321 Manual do Utilizador descarregar pdf (Página 9)

OPERATIONAL GUIDE

ELECTRODE AND PROBE CONNECTIONS

For combination pH or ORP electrodes (with internal reference) plug

the electrode's BNC to the socket on the back of the meter (pages 4-

5, # I).

For electrodes with a separate reference, connect the measuring

electrode's BNC to the BNC socket (pages 4-5, # I) and the reference

electrode plug to the other socket (pages 4-5, # II or III).

For temperature measurements and automatic temperature compen-

sation connect the temperature probe to the appropriate socket

(pages 4-5, # IV).

POWER CONNECTION

Plug the 12VDC transformer (HI 710005 or HI 710006) into the DC

socket (pages 4-5, # VI). Plug the transformer to the mains.

Note: Make sure the main line is protected by a fuse.

HI 931400 and HI 931401 use an EEPROM to retain the pH, mV

and temperature calibrations as well as the serial communication

setting. The instrument will retain the data after a calibration or

serial communication setting, even when it is unplugged.

pH MEASUREMENTS

To take a pH measurement simply submerge

the tip (4cm/1½") of the electrode and the

temperature probe into the sample to be

tested.

Turn the instrument on.

The meter automatically defaults to the pH

measurement mode.

Allow a couple of minutes for the electrode to

stabilize.

pH is displayed on the primary display and

temperature on the secondary one.

4 cm

(1½

°C

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Hanna-instruments HI 9321 Manual do Utilizador Página 9