8
OPERATIONAL GUIDE
POWER CONNECTION
Plug the 12 VDC adapter into the power supply socket.
Note:
These instruments use non volatile memory to retain the pH, mV,
temperature calibrations and all other settings, even when unplugged.
Note:
Make sure a fuse protects the main line.
ELECTRODE AND PROBE CONNECTIONS
For pH or ORP measurements connect an electrode with internal reference to
the BNC connector on the back of the instrument.
For electrodes with a separate reference connect the electrodes BNC to the BNC
connector and the reference electrode plug to the reference socket.
For temperature measurements and automatic temperature compensation
connect the temperature probe to the appropriate socket.
INSTRUMENT START-UP
Turn the instrument on by pressing the
ON/OFF
switch.
All LCD tags are displayed and a beep is sounded while
the instruments perform a self test.
HI 110
and
HI 111
HI 112
and
HI 113
pH MEASUREMENTS
Make sure the instrument has been calibrated before
taking pH measurements.
Submerge the electrode tip and the temperature probe
approximately 4 cm (1½) into the sample to be tested
and stir gently. Allow time for the electrode to stabilize.
The pH is displayed on the primary LCD and the temperature on the
secondary LCD.
If the reading is out of range, the closest full-scale value will be displayed
blinking on the primary LCD.
pH
BUFFER pH
INTV
DATE
TIME
%
3
2
1
BUF
WRONG
READY
CFM
MEM
pH
mV
CAL
BUFFER pH
INTV
DATE
TIME
%
BUF
WRONG
READY
CFM
MEM
pH
mV
CAL
