7
3 cm
(1¼")
OPERATIONAL GUIDE
POWER CONNECTION
Plug the 12 VDC adapter into the power supply socket.
Notes:
• This instrument uses non volatile memory to retain the pH,
mV, temperature calibrations and all other settings, even
when unplugged.
• 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 electrode’s 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 located on
the rear panel.
• All LCD tags are displayed and a beep is sounded while the instruments
perform a self test.
• The instrument will display “
LoAd
” message and
“ ” blinking until initialization is complete.
pH MEASUREMENTS
Make sure the instrument has been calibrated before
taking pH measurements.
• Submerse the electrode tip and the temperature
probe approximately 3 cm (1¼”) 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.
42
ORP PRETREATMENT SOLUTIONS
HI 7091L
Reducing Pretreatment Solution, 500 mL
HI 7092L
Oxidizing Pretreatment Solution, 500 mL
pH ELECTRODES
All electrodes part numbers ending in B are supplied with a BNC connector
and 1 m (3.3') cable, as shown below :
HI 1043B
Glass-body, double junction, refillable, combination
pH
electrode.
Use: strong acid/alkali.
HI 1053B
Glass-body, triple ceramic, conic shape, refillable, combination
pH
electrode. Use: emulsions.
HI 1083B
Glass-body, micro, Viscolene, non-refillable, combination
pH
electrode.
Use: biotechnology, micro titration.
HI 1131B
Glass-body, double junction, refillable, combination
pH
electrode.
Use: general purpose.