User Guide

19
OPERATIONAL GUIDE
INITIAL PREPARATION
Each meter is supplied complete with a 9V battery. Slide off the
battery compartment cover on the back of the meter (see page 43),
install the battery while paying attention to its polarity.
Always remove the electrode protective cap before taking any mea-
surements. If the electrode has been left dry, soak the tip (bottom
4 cm/1½") in a pH 7 or pH 4 buffer solution for a few hours or
overnight to reactivate it.
For HI 8014:
Connect the pH electrode to the BNC socket on the top of the meter.
Turn the meter on by turning the rotary knob to the °C, pH or mV
position.
For HI 8314, HI 8915, HI 8424 and HI 9622:
Connect the pH electrode to the BNC socket on
the top of the instrument. Connect the tem-
perature probe to the other socket. The
temperature probe can be used independently
to take temperature measurements, or it can
be used in conjunction with the pH electrode to
utilize the meter's ATC capability. With HI 8424
and HI 9622, when the probe is disconnected,
temperature can also be set manually (see
page 22).
Turn the meter on by pressing ON/OFF.
With HI 9622, the display will show the
previous calibration date (month & date) for 3
seconds.
For HI 9214:
Connect the pH electrode to the screw connector on the meter. Be sure
that the electrode and the meter connections are clean and dry to
ensure a positive contact. Turn the meter on pressing ON/OFF.
CAL
month day
ON
OFF
TOP VIEW
BNC
electrode
connector
OFF
mV
°C
pH
ON
OFF
ins
e
rum n s
ON
OFF
CAL
CFM
pH
HI 9214 stick pHmeter
38
SYMPTOMS PROBLEM SOLUTION
For HI 8424 only
Display shows "E5"
For HI 9622 only
Display shows "pH----"
Display shows "°C"
blinking
Display shows "mV----"
Display shows "Er-7"
Display shows "Er-4"
Display shows "Er-10"
Ec
Eb
Er
Erroneous buffer so-
lution used for slope
calibration
An out of order pH
electrode
Out of range- pH
scale
No temperature
probe attached
Out of range- mV
scale
Erroneous pH 7 buffer
solution used for off-
set calibration
An out of order pH
electrode
Erroneous pH 4 buffer
solution used for
slope calibration
An out of order pH
electrode
Erroneous pH 10
buffer solution used
for slope calibration
An out of order pH
electrode
Wrong buffer
Unfit electrode
Low battery
Over-Range
Dry electrode
Use fresh buffer solution
Replace the electrode
a) Check the calibration
b) Ensure that the pH value
is between 0 and 14
c) Check the level of electrolyte
and the state of the electrode
itself
Make sure the temperature
probe is attached properly
Make sure the mV value is
within ±1999
Use fresh pH 7 buffer solution
Replace the electrode
Use fresh pH 4 buffer solution
Replace the electrode
Use fresh pH 10 buffer solu-
tion
Replace the electrode
Change the buffer solution.
Clean, condition and if neces-
sary change the electrode.
Replace the battery.
Repeat conditioning.
For HI9214 & HI931000 only