Operational Guide - Hanna Instruments HI 3221 Instruction Manual

OPERATIONAL GUIDE

OPERATIONAL GUIDE OPERATIONAL GUIDE OPERATIONAL GUIDE OPERATIONAL GUIDE
POWER CONNECTION
Plug the 12 Vdc adapter into the power supply socket.
Notes: • These instruments use non volatile memory to retain the pH, mV,
Ion calibrations and all other settings, when unplugged.
• Make sure a fuse protects the main line.
ELECTRODE AND PROBE CONNECTIONS
For pH or ORP measurements connect a combination pH/ORP electrode to the
BNC connector located on the rear panel of the instrument (16 – see page 7).
For ISE measurements (HI 3221 & HI 3222 only) connect a combination ISE
electrode to the BNC connector located on the rear panel of the instrument (16
for HI 3221 or 13 for HI 3222 – see page 7).
For half cell electrodes with a separate reference connect the electrode's BNC to
the BNC connector and the electrode's reference to the corresponding reference
input socket.
For temperature measurements and automatic temperature compensation
connect the temperature probe to the appropriate socket. HI 3222, two
channels instrument, use a proper temperature socket (14, 17 – see page 7)
for each channel. As the channels are fully isolated use 2 temperature probes
in order to view the independent temperature reading on each channel.
INSTRUMENT START UP
• Turn the instrument on from the power switch located on the rear panel
of the instrument (10 – see page 7).
• Wait until the instrument finishes the initialization process. During this
process the Hanna Instrument logo is displayed.
pH MEASUREMENTS
To take a pH measurement remove the electrode protective
cap and simply submerse the electrode and the tempera-
ture probe 3 cm (1¼") into the sample to be tested.
If necessary, press RANGE until the display changes to
the pH mode. Enter SETUP menu to select the pH
resolution.
In the HI 3222, press Channel if the ISE measurements
are displayed.
3 cm
11