User Guide
27
• Remove the protective cap from the elec-
trode, rinse the tip of the electrode with
some pH 7.01 solution, then immerse the
pH electrode and temperature probe in a
pH 7.01 buffer solution. Stir gently and
wait a couple of minutes for thermal equi-
librium.
Note: the electrode should be submerged ap-
proximately 4 cm (1½") into the solution.
The temperature probe should be lo-
cated close to the pH electrode.
• Press °C to display the temperature of the buffer (e.g. 20.0°C).
• Press the pH key to read pH values. Stir
gently and wait for a couple of minutes.
• Adjust the STD trimmer (for HI 8314) or OFFSET trimmer (for
HI 8915) on the lower left of the front panel until LCD shows the
pH value at the noted temperature (see the pH versus tempera-
ture chart on page 35).
• Rinse and immerse the pH electrode in
pH 4.01 or pH 10.01 buffer (2
nd
calibra-
tion point) and stir gently.
• Wait a couple of minutes and adjust the SLOPE trimmer on the
lower right of the front panel until the LCD shows the pH value
at the noted temperature.
The pH calibration is now complete.
HI 7007
4 cm
(1½
")
°C
ºC
pH
HI 7004
OFFSET
pH
SLOPE
pH
30
PROCEDURE FOR HI 9214:
• Turn the meter on.
Note: The stability indicator "∆" blinks when
the electrode is not immersed in the
solution.
• Remove the protective cap from the pH/°C
electrode. Rinse the tip of the electrode
with some pH 7.01 solution, then immerse
it in a pH 7.01 buffer solution. Stir gently
and wait a couple of minutes for the
reading to stabilize.
Note: The electrode should be submerged
approximately 4 cm (1½") in the solu-
tion.
• Press CAL. The display will flash "7.01 ∆".
• Wait until the stability indicator "∆" stops
flashing.
• Press CFM to confirm the first buffer solu-
tion.
• If the ON/OFF key is pressed at this point, the calibration process
will end with only the offset (one-point) calibration. For best
accuracy, however, it is recommended that two-point calibration
is performed.
• The LCD will now flash "4.01 ∆". If the
CAL key is pressed, the slope calibration
will change to "10.01 ∆".
ON
OFF
in
s
e
r
u
m
n
s
O
N
O
F
F
CAL
C
F
M
HI 9214 stick pHmeter
HI 7007
4 cm
(1½
")
ins
e
r
u
m
n
s
ON
OFF
C
A
L
C
F
M
H
I
9
2
1
4
s
t
ic
k
p
H
m
e
t
e
r
CAL
∆
∆
CFM
∆