Hanna Instruments HI 9321 - Manual (Page 9)

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.
ON
4 cm (1½
")
pH
°C