Hanna Instruments pH 213 User Manual

10
ORP MEASUREMENTS (pH211 and pH213 only)
An optional ORP electrode must be used to perform ORP measurements
(see accessories).
Oxidation-reduction potential (REDOX) measurements provide the quan-
tification of the oxidizing or reducing power of the sample tested.
To correctly perform a redox measurement, the surface of the ORP
electrode must be clean and smooth.
• Switch the meter on and press the "RANGE" key to
enter the mV mode.
• Submerge the ORP electrode tip (4cm/1½") into
the sample. Allow a few minutes for the reading
to stabilize.
• The meter displays the mV reading on the primary display.
• If readings are out of range, "---" will appear on the LCD.
TAKING TEMPERATURE MEASUREMENTS
Taking a temperature measurement is very easy.
Connect the HI 7669/2W temperature probe and
turn the instrument on. Dip the temperature probe
in the sample and allow the reading on the second-
ary display to stabilize.
HOLD FUNCTION
Press and hold MEM. The last reading will be frozen on the display
until MEM is released. During this operation, the MEM indicator is also
shown on the LCD.
Press MR and the previously memorized reading will be
displayed with the MEM indicator on the LCD.
4 cm
(1½")
23
TROUBLESHOOTING GUIDETROUBLESHOOTING GUIDE
TROUBLESHOOTING GUIDETROUBLESHOOTING GUIDE
TROUBLESHOOTING GUIDE
Symptoms Problem Solution
The meter is slow in
responding or gives
faulty readings
The meter does not ac-
cept the 2
nd
buffer
solution for calibration
The reading drifts
Display shows:
Display shows:
Display shows:
Display shows:
"WRONG
1
"
and
"WRONG "
Display shows:
"WRONG
2
"
and
"WRONG "
The meter does not
work with the tempera-
ture probe
The meter fails to cali-
brate or gives faulty
readings
The electrode is not work-
ing or the reference
junction is clogged
Out of order pH electrode
Defective pH electrode
Out of range pH scale
Out of range tempera-
ture scale
Out of range mV scale
Erroneous buffer solution
used for offset calibra-
tion
Defective electrode
Erroneous buffer solution
used for slope calibration
Defective electrode
Out of order temperature
probe
Out of order pH electrode
Leave the electrode in a stor-
age solution after cleaning
the junction. If problem per-
sists, replace the electrode
Follow the cleaning proce-
dure. If this doesn't work
replace the electrode
Replace the electrode
a) Recalibrate
b) Make sure the pH sample
is in the specified range
c) Check the electrolyte level
and the general state of
the pH electrode
Make sure the temperature
is in the 0 to 100C range
and the temperature probe is
plugged in
Electrode not connected
Make sure the buffer setting
is correct and the solution is
fresh. Replace the buffer if
necessary
Replace the electrode
Make sure the buffer setting
is correct and the solution is
fresh. Replace the buffer if
necessary
Replace the electrode
Replace the probe
Replace the electrode

Hanna Instruments pH 213 Specifications

General

Brand	Hanna Instruments
Model	pH 213
Category	Measuring Instruments
Language	English