User Guide

20
For HI 931000:
Attach the pH/°C electrode to the DIN socket on the top of the meter,
tighten the retainer ring and turn the meter on by pressing ON/OFF.
TAKING pH MEASUREMENTS
For HI 8014:
To take a pH measurement simply submerge
the tip (4cm/1½") of the electrode and a
ChecktempC (or an accurate thermometer) in
the sample to be tested.
Turn the rotary knob to the °C position to
display temperature setting on the LCD.
Using the provided screwdriver, turn the tem-
perature trimmer to display the temperature
measured by ChecktempC (or an accurate thermometer), e.g. 25°C..
Turn the rotary knob to the pH position to
display the pH measurement.
Shake the electrode briefly and allow a couple
of minutes for the electrode to adjust and
stabilize. The display will show the pH value
compensated for the manually adjusted tem-
perature.
For HI 8314, HI 8424, HI 8915 and HI 9622:
To take a pH measurement simply submerge
the tip (4cm/1½") of the electrode and the
temperature probe in the sample to be tested.
ins rum n s
CFM
°C
CAL
OFF
ON
pH
HI 931000
ON
OFF
°
C
4 cm
(1½
")
OFF
mV
°C
pH
OFF
mV
°C
pH
pH
4 cm
(1½
")
°C
ºC
37
TROUBLESHOOTING GUIDE
SYMPTOMS PROBLEM SOLUTION
The meter fails to cali-
brate or gives faulty
readings
The meter is slow in
responding or gives
faulty readouts
The meter does not
accept the 2
nd
buffer
solution
The reading drifts
The meter does not
work with the tem-
perature probe
For HI 8424 only
Display shows "E1"
Display shows "E2"
Display shows "E3"
Display shows "E4"
Check the buffer solution and
replace it if necessary
Replace the pH electrode
Leave the electrode in a stor-
age solution after cleaning the
junction. If problem persists,
replace the electrode
Check the buffer solution and
replace it if necessary
Follow the cleaning procedure.
If this doesn't work replace
the electrode
Follow the cleaning procedure
and replace the pH electrode
if necessary
Replace the probe.
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
value is within 0 and 100°C
Make sure the mV value is
within ±1999
Make sure the buffer solution
used is pH 7 and replace it if
necessary
Replace the pH electrode
Erroneous buffer so-
lution used for
calibration.
An out of order pH
electrode
The electrode is not
working or the refer-
ence junction is
clogged
Erroneous buffer so-
lution used for slope
calibration
An out of order pH
electrode
A clogged or an out
of order pH electrode
An out of order probe
Out of range- pH
scale
Out of range- °C
scale
Out of range- mV
scale
Erroneous buffer so-
lution used for offset
calibration
An out of order pH
electrode