Hanna Instruments HI122-01 Owner Manual

Instruction Manual
HI120 & HI122
pH/mV/Temperature
Bench Meters
with Calibration Check
ON
OFF
HI122
CAL
pH / mV Meter
CFM
CLR
LOG
Calibration
www.hannainst.com
1
Check
Dear Customer,
Thank you for choosing a Hanna Instruments product.
Please read this instruction manual carefully before using these instruments.
This manual will provide you with the necessary information for correct use
of these instruments, as well as a precise idea of their versatility.
If you need additional technical information, do not hesitate to e‑mail us at
[email protected] or view our worldwide contact list at
www.hannainst.com.
TABLE OF CONTENTS
PRELIMINARY EXAMINATION.................................................................. 4
GENERAL DESCRIPTION.......................................................................... 4
FUNCTIONAL DESCRIPTION HI120 ......................................................... 5
FUNCTIONAL DESCRIPTION HI122 ......................................................... 6
HI120 AND HI122 SPECIFICATIONS..................................................... 11
OPERATIONAL GUIDE........................................................................... 12
pH CALIBRATION................................................................................. 15
ENHANCED CALIBRATION MESSAGES.................................................... 20
ELECTRODE CONDITION & ELECTRODE RESPONSE TIME.......................... 22
RELATIVE mV CALIBRATION.................................................................. 22
GOOD LABORATORY PRACTICE (GLP)...................................................... 23
SETUP................................................................................................ 27
LOGGING............................................................................................. 32
AutoHOLD........................................................................................... 36
PRINTING (HI122 only)....................................................................... 36
TEMPERATURE CALIBRATION (for technical personnel only)..................... 40
mV CALIBRATION (for technical personnel only)...................................... 41
PC INTERFACE..................................................................................... 42
pH BUFFER TEMPERATURE DEPENDENCE.............................................. 44
ELECTRODE CONDITIONING & MAINTENANCE......................................... 45
PRINTER MAINTENANCE (HI122 only)................................................... 47
TROUBLESHOOTING GUIDE.................................................................. 48
TEMPERATURE CORRELATION FOR pH SENSITIVE GLASS......................... 50
ACCESSORIES...................................................................................... 51
3
PRELIMINARY EXAMINATION
Remove the instrument from the packing material and examine it carefully
to make sure that no damage has occurred during shipping. If there is any
damage, contact your local Hanna Instruments Office.
Each instrument is supplied with:
• HI1131P Glass-body Combination pH Electrode
• HI7662-T Temperature probe
• pH4.01 & 7.01 Buffer solutions, 20 mL each
• HI7082S Electrolyte solution
• 5 paper rolls (HI122 only)
• 12VDC Power Adapter
• Instruction Manual
Note: Save all packing material until you are sure that the instrument
functions correctly. All defective items must be returned in the original
packing with the supplied accessories.
GENERAL DESCRIPTION
The Hanna HI120 and HI122 are professional bench meters for pH, ORP
(Oxidation Reduction Potential) and Temperature measurements with
Calibration Check. Relative mV feature is also provided.
Calibration Check performs a set of diagnostic tests during calibration using
the history of electrode slope and offset to detect problems that can cause
loss of accuracy.
Calibration Check Features are:
• Enhanced Calibration Messages
• Electrode Condition on LCD Display
• Electrode Response Time on LCD Display
• Calibration Alarm Time-Out
• Out of Calibration Range
Other features include:
• Up to five-point calibration with seven memorized buffers (1.68, 4.01,
6.86, 7.01, 9.18, 10.01 and 12.45 pH) and two custom buffers.
• pH calibration using pH buffers with 0.001 resolution.
• pH reading with manual or automatic temperature compensation.
• Up to 50 samples for Log on demand mode and up to 1000 samples
for AutoLOG mode.
• Two selectable alarm limits.
• User selectable AutoLOG modes.
• Printing feature in four selectable languages (HI122 only).
• Large easy-to-read LCD which shows the pH or mV and Temperature
simultaneously, together with graphic symbols.
4
• AutoHOLD feature to freeze first stable reading on the LCD.
• GLP feature to view last calibration data for pH and Relative mV.
• PC interface.
FUNCTIONAL DESCRIPTION
HI120
Front Panel
Electrode Condition
Primary LCD
Secondary LCD
Electrode Response
ON
OFF
HI120
AutoHOLD
GLP
pH / mV Meter
SET
CAL
CFM
CLR
AutoLOG
MODE
pH
mV
RelmV
Reso
NUM
LOG
2
4
1
3
Rear Panel
PIN
pH/ORP
5
1)
2)
3)
4)
5)
6)
7)
8)
9)
TEMP
POWER
RS232
7
6
RCL
Calibration Check
9
8
Left Keyboard
ON switch
OFF switch
Right Keyboard
Pin input socket
BNC electrode connector
Temperature probe socket
Power adapter socket
RS232 serial communication connector
5
FUNCTIONAL DESCRIPTION
HI122
Front Panel
Paper Roll
Electrode Condition
Primary LCD
Secondary LCD
Electrode Response
ON
OFF
HI122
AutoHOLD
Print
pH / mV Meter
Paper
CAL
CFM
CLR
AutoLOG
pH
mV
RelmV
Reso
NUM
LOG
Calibration Check
2
4
1
3
Rear Panel
PIN
pH/ORP
5
POWER
RS232
7
6
1)
2)
3)
4)
5)
6)
7)
8)
9)
10)
TEMP
9
8
10
Left Keyboard
ON switch
OFF switch
Right Keyboard
Pin input socket
BNC electrode connector
Temperature probe socket
Power adapter socket
RS232 serial communication connector
Printer
6
HI120
KEYBOARD ON THE LEFT
Shortcuts to alternate functions
1) AutoHOLD key, to freeze the first stable reading on the LCD.
2) GLP key, to display Good Laboratory Practice Information.
3) SET key, to enter/exit SETUP mode.
4)
key, to toggle between parameters while in RECALL or SETUP
modifying mode (backwards), to toggle between absolute mV and
temperature while in Relative mV mode and between pH buffer and
temperature while in pH calibration mode.
5) AutoLOG key, to start/stop AutoLOG mode.
6)
key, to toggle between parameters while in RECALL or SETUP modi‑
fying mode (forwards), to toggle between absolute mV and temperature
while in Relative mV mode and between pH buffer and temperature
while in pH calibration mode.
7) pH key, to select pH range.
8) mV key, to select mV range.
9) RelmV key, to select Relative mV range.
11) Resolution key, to select pH resolution.
Numerical keys
10) key, to change sign.
12) NUM key, to activate the numerical keys (0 to 9).
7
HI120
MAIN KEYBOARD ON THE RIGHT
HI120
pH / mV Meter
3
1
2
CAL
CFM
CLR
5
6
4
MODE
7
9
8
LOG
RCL
Calibration Check
1) CAL key, to enter and exit/escape calibration mode.
SET key (second function), to enter/exit SETUP mode.
2) CFM key, to confirm different values.
GLP key (second function), to display Good Laboratory Practice Infor‑
mation.
3) CLR key, to clear calibration or logged data.
4)
key, to manually increase temperature value or other parameters.
AutoHOLD key (second function), to freeze the first stable reading on
the LCD.
5)
key, to manually decrease temperature value or other parameters.
AutoLOG key (second function), to start/stop AutoLOG mode.
6) MODE key, to select the measurement unit or to switch focused data.
7) 2nd key, to select second key function.
8) LOG key, to store measured data.
9) RCL key, to enter/exit view logged data mode.
Note: To select second key function, press 2nd and then the desired
key. The “2nd” tag will appear on the LCD until the desired key is
pressed. To leave second key function selection, press 2nd again.
8
HI122
KEYBOARD ON THE LEFT
Shortcuts to alternate functions
1) AutoHOLD key, to freeze the first stable reading on the LCD.
2) Print key, to obtain a printout or to cancel printing.
3) Paper key, to pull out the paper.
4)
key, to toggle between parameters while in RECALL or SETUP
modifying mode (backwards), to toggle between absolute mV and
temperature while in Relative mV mode and between pH buffer and
temperature while in pH calibration mode.
5) AutoLOG key, to start/stop AutoLOG mode.
6)
key, to toggle between parameters while in RECALL or SETUP modi‑
fying mode (forwards), to toggle between absolute mV and temperature
while in Relative mV mode and between pH buffer and temperature
while in pH calibration mode.
7) pH key, to select pH range.
8) mV key, to select mV range.
9) RelmV key, to select Relative mV range.
11) Resolution key, to select pH resolution.
Numerical keys
10) key, to change sign.
12) NUM key, to activate the numerical keys (0 to 9).
9
HI122
MAIN KEYBOARD ON THE RIGHT
HI122
pH / mV Meter
3
1
2
CAL
CFM
CLR
5
6
4
7
9
8
LOG
Calibration Check
1) CAL key, to enter and exit/escape calibration mode.
SET key (second function), to enter/exit SETUP mode.
2) CFM key, to confirm different values.
GLP key (second function), to display Good Laboratory Practice Infor‑
mation.
3) CLR key, to clear calibration or logged data.
4)
key, to manually increase temperature value or other parameters.
AutoHOLD key (second function), to freeze the first stable reading on
the LCD.
5)
key, to manually decrease temperature value or other parameters.
AutoLOG key (second function), to start/stop AutoLOG mode.
6) MODE key, to select the measurement unit or to switch focused data.
Paper key (second function), to pull out the paper.
7) 2nd key, to select second key function.
8) LOG key, to store measured data.
9) RCL key, to enter/exit view logged data mode.
Print key (second function), to obtain a printout or to cancel printing.
Note: To select second key function, press 2nd and then the desired
key. The “2nd” tag will appear on the LCD until the desired key is
pressed. To leave second key function selection, press 2nd again.
10
HI120 AND HI122
SPECIFICATIONS
–2.00 to 16.00 pH
–2.000 to 16.000 pH
RANGE
±999.9 mV
±2000 mV
–20.0 to 120.0 ºC (–4.0 to 248.0 ºF)
0.01 pH
0.001 pH
RESOLUTION
0.1 mV
1 mV
0.1 ºC (0.1 ºF)
ACCURACY
@ 25 °C / 68 °F
±0.2 mV (±699.9 mV)
±0.5 mV (±999.9 mV)
±1 mV (± 2000 mV)
±0.4 ºC (±0.7 ºF)
(excluding probe error)
Relative mV offset range
±2000 mV
pH Calibration
Up to five-point calibration, 7 standard
buffers available (1.68, 4.01, 6.86, 7.01,
9.18, 10.01, 12.45), and 2 custom buffers
Temperature compensation
Manual or Automatic from:
–20.0 to 120.0 ºC (–4.0 to 248.0 ºF)
pH Electrode
HI1131P
Temperature probe
HI7662
Logging Interval
5 seconds to 180 minutes
Printer (HI122 only)
Dot matrix, 44 mm wide paper
PC interface
opto-isolated RS232
Input impedance
1012 ohm
Power supply
12 VDC adapter
Dimensions
280 x 203 x 84 mm (11.0 x 8.0 x 3.3”)
Weight
1.8 Kg (4.1 lb); kit with printer: 1.9 Kg
(4.2 lb)
Environment
0 – 50 ºC (32 – 122 ºF)
max. 95% RH non-condensing
Warranty
2 years
11
OPERATIONAL GUIDE
POWER CONNECTION
Plug the 12 VDC adapter into the power supply socket.
Notes: • These instruments use 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 Hanna Instruments P type pH or ORP electrodes (with internal reference)
connect the electrode’s BNC to the socket on the back of the instrument (#6 on
page 4 and 5) and the pin to the appropiate socket (#5 on page 4 and 5).
Notes: • Electrode condition and response information is displayed on the
bar graph gauges during the day the calibration is performed only
if Hanna Instruments P type (PIN) electrodes are used.
• If the electrode is not recognized as a Hanna Instruments P type
electrode, the bar graph gauges will blink (25 seconds OFF,
4 seconds ON, full bar graph).
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 switch.
• All LCD tags are displayed and a beep is heard while the instrument
performs a self test.
• The instrument displays then the date on the primary LCD and the time
on the secondary LCD, along with the “Remove protective cap” and
“Unscrew electrode refilling cap” messages alternatively blinking. These
messages alert the user to follow displayed instructions in order to take
proper measurements and to improve electrode response.
• The instrument automatically defaults to pH or mV measurement mode,
if a Hanna Instruments P type pH or ORP electrode is detected.
• If no Hanna Instruments P type electrode is detected, the instrument
starts in the same range as it was at power off.
12
pH MEASUREMENTS
Make sure the instrument has been calibrated before
taking pH measurements.
• Press MODE to enter pH mode.
Note: To change pH resolution, press MODE again
or simply Resolution from the left keyboard.
• Submerge the electrode tip and the temperature probe
approximately 4 cm (1½”) into the sample to be
tested. Allow time for the electrode to stabilize.
• The pH is displayed on the primary LCD and the
temperature on the secondary LCD.
OUT CAL RANGE feature warns the user if the current reading is out of the
calibrated area. The calibrated area is that part of the pH range in which
the calibration point assures an accurate reading. If the reading is taken
out of the calibration area, the “OUT CAL RANGE” message will blink. The
calibrated area is calculated according to the pH resolution used during the
reading. To avoid having this message, the calibration points have to be
well distributed in the desired measurement range.
If measurements are taken successively in different samples, it is recommended
to rinse the electrode thoroughly with deionized water or tap water and then
with some of the next sample to prevent cross-contamination and to condition
the electrode before immersing it into the sample solution.
The pH reading is affected by temperature. In order to measure the pH
accurately, the temperature effect must be compensated for. To use the
Automatic Temperature Compensation feature, connect and submerge
the HI7662-T temperature probe into the sample as close as possible to
the electrode and wait for a few seconds.
If the temperature of the sample is known, manual temperature compensation can be performed by disconnecting the temperature probe.
The display will then show the default temperature of 25 ºC (77 ºF) or the last
temperature reading with the “ºC” (or “ºF”) tag blinking. The temperature
can be adjusted with the ARROW keys or the numerical keypad
(from –20.0 ºC to 120.0 ºC or from –4.0 ºF to 248.0 ºF).
Press NUM to change the temperature value with the numerical keys. The
“2nd” tag will blink.
13
Press CLR if you want to delete digits of the displayed value. The remaining
digits will shift to right. Introduce the desired value. If the value is out of
temperature range, a long beep will be heard. Press NUM to confirm the
new value or CAL to escape without changing the temperature.
mV/ORP MEASUREMENTS
Oxidation-reduction potential (REDOX) measurements provide the quantification
of the oxidizing or reducing power of the tested sample.
To correctly perform a redox measurement, the surface of
the ORP electrode must be clean and smooth.
• Press MODE or simply mV from the left keyboard to
enter mV range.
• Submerge the tip of the ORP electrode (4 cm/1½”) into the sample to
be tested and allow a few seconds for the reading to stabilize.
• The instruments display the mV reading 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.
RELATIVE mV MEASUREMENTS
To enter Relative mV mode, press MODE or simply RelmV from the left
keyboard. The relative mV reading will be displayed on the primary LCD
and the current temperature value on the secondary LCD.
Note: Press or from the left keypad to toggle between temperature and absolute mV reading on the secondary LCD.
The Relative mV reading is equal to the difference between the absolute mV
input value and relative mV offset established in the relative mV calibration.
TEMPERATURE MEASUREMENTS
Connect the HI7662-T temperature probe to the appropriate
socket. Immerse the temperature probe into the sample and
allow the reading on the secondary LCD to stabilize.
14
Note: The temperature can be displayed in Celsius degrees (º C) or in
Fahrenheit degrees (º F) (see SETUP for details, page 27).
pH CALIBRATION
Calibrate the instrument often, especially if high accuracy is required.
The instrument should be recalibrated:
• Whenever the pH electrode is replaced.
• At least once a week.
• After testing aggressive chemicals.
• If “CAL DUE” tags are blinking during measurement.
• If “OUT CAL RANGE” message blinks during pH measurement
(the measurement range is not covered by current calibration).
PREPARATION
Pour small quantities of the buffer solutions into clean beakers. If possible,
use plastic or glass beakers to minimize any EMC interferences.
For accurate calibration and to minimize cross-contamination, use two beakers
for each buffer solution. One for rinsing the electrode and one for calibration.
If you are measuring in the acidic range, use pH7.01 or 6.86 as first buffer
and pH4.01 or 1.68 as second buffer. If you are measuring in the alkaline range,
use pH7.01 or 6.86 as first buffer and pH10.01/9.18 or 12.45 as second buffer.
For extended range measurements (acidic and alkaline), perform a five-point
calibration by selecting five of the available buffers.
PROCEDURE
If 0.001 pH resolution is selected, each selected standard buffer value can
be updated according to the value on the production lot certificate at 25
ºC (77 ºF). Press 2nd then SET key when a standard pH buffer with 0.001
resolution is selected. The buffer value will start blinking and it can be
changed with the ARROW keys in a ±0.020 pH window.
Calibration has a choice of 7 memorized buffers: pH1.68, 4.01, 6.86, 7.01,
9.18, 10.01, 12.45 and 2 custom buffers.
The custom buffers are a special option that allows the user to calibrate in a
buffer solution different from a standard one. Up to two custom buffers can
be set in SETUP menu (see page 27). When selected during calibration, the
“CUSTOM C1” or “CUSTOM C2” tags are displayed on the LCD and the custom
buffer value can be changed in a ±1.0 pH window, around the set value.
For accurate measurements it is recommended to perform a five-point
calibration. However, at least a two-point calibration is suggested.
15
The instruments will automatically skip the buffers used during calibration
and the buffers which are in a ±0.2 pH window, around one of the
calibrated buffers.
All new calibrations will override existing stored calibration data, in a ±0.2
pH window, at these calibration points. The slopes adjacent to the calibration
points will be reevaluated.
If the new calibration point has no correspondence in the existing stored
calibration data, it is added to it if this is not full, or the instrument will
ask which buffer will be replaced by the current buffer.
If at least a two-point calibration has been performed and an offset correction
of the electrode is desired, keeping unchanged the existing slopes, perform
a one-point calibration with “OFFS” option selected in SETUP menu. If
“Pnt” option is selected, the slopes adjacent to the calibration points will
be reevaluated.
FIVE-POINT CALIBRATION
• Immerse the pH electrode and the temperature probe
approximately 4 cm (1½”) into a buffer solution
of your choice (pH1.68, 4.01, 6.86, 7.01, 9.18,
10.01, 12.45, custom buffer 1 or 2, if these were
set) and stir gently. The temperature probe should
be close to the pH electrode.
• Press CAL. The “CLEAR CAL IF NEW ELECTRODE”
message will be displayed blinking on the LCD for a
few seconds if the instrument was calibrated before CAL
and calibration was not cleared.
Press CLR if you are using a new electrode or want
to clear calibration history, or wait a few seconds to continue.
Press CAL again or the ARROW keys to skip this message.
Note: It is very important to clear calibration history when a new
electrode is used because most errors and warning messages that
appear during calibration depend on calibration history.
• The instruments will display the measured pH on the primary LCD and
the “7.01” buffer on the secondary LCD, together with “CAL” and “Cal
Point 1” tags and “7.01” tag blinking.
16
• If necessary, press the ARROW keys to select a different buffer value.
• The “ ” tag will blink on the LCD until the reading is stable.
• When the reading is stable and close to the selected buffer, “CFM” tag
blinks.
• Press CFM to confirm calibration.
• The calibrated value is then displayed on the primary CFM
LCD and the secondary LCD will display the second
expected buffer value, together with “CAL”, “Cal Point
2” and “7.01” tags and the corresponding buffer tag
blinking.
• After the first calibration point is confirmed, immerse the pH electrode and
the temperature probe approximately 4 cm (1½”) into the second buffer
solution and stir gently. The temperature probe should be close to the pH
electrode.
• If necessary, press the ARROW keys to select a different buffer value.
• The “ ” tag will blink on the LCD until the reading is stable.
• When the reading is stable and close to the selected
buffer, “CFM” tag blinks.
• Press CFM to confirm calibration.
• The calibrated value is then displayed on the primary CFM
LCD and the secondary LCD will display the third
expected buffer value.
• After the second calibration point is confirmed, immerse the pH electrode
and the temperature probe approximately 4 cm (1½”) into the third
buffer solution and stir gently. The temperature probe should be close
to the pH electrode.
• If necessary, press the ARROW keys to select a different buffer value.
• The “ ” tag will blink on the LCD until the reading is stable.
17
• When the reading is stable and close to the selected buffer, “CFM” tag
blinks.
• Press CFM to confirm calibration.
• The calibrated value is then displayed on the primary
LCD and the secondary LCD will display the fourth CFM
expected buffer value.
• After the third calibration point is confirmed, immerse the pH electrode and the
temperature probe approximately 4 cm (1½”) into the fourth buffer solution
and stir gently. The temperature probe should be close to the pH electrode.
• If necessary, press the ARROW keys to select a different buffer value.
• The “ ” tag will blink on the LCD until the reading is stable.
• When the reading is stable and close to the selected buffer, “CFM” tag
blinks.
• Press CFM to confirm calibration.
• The calibrated value is then displayed on the primary CFM
LCD and the secondary LCD will display the fifth
expected buffer value.
• After the fourth calibration point is confirmed, immerse the pH electrode
and the temperature probe approximately 4 cm (1½”) into the fifth
buffer solution and stir gently. The temperature probe should be close
to the pH electrode.
• If necessary, press the ARROW keys to select a different buffer value.
• The “ ” tag will blink on the LCD until the reading is stable.
• When the reading is stable and close to the selected
buffer, “CFM” tag blinks.
• Press CFM to confirm calibration.
• The instruments store the calibration values and CFM
return to normal measurement mode.
FOUR, THREE or TWO-POINT CALIBRATION
• Proceed as described in “FIVE-POINT CALIBRATION” section.
• Press CAL after the appropriate accepted calibration point. The instru‑
ments will return to measurement mode and will memorize the calibration
data.
ONE-POINT CALIBRATION
Two SETUP selectable options are available: “Pnt” and “OFFS”.
If the “Pnt” option is selected, the adjacent slopes will be reevaluated.
If the “OFFS” option is selected, an electrode offset correction is performed
keeping unchanged the existing slopes.
• Proceed as described in “FIVE-POINT CALIBRATION” section.
• Press CAL after the first calibration point was confirmed. The instru‑
ments will memorize the one-point calibration data and will return to
measurement mode.
18
Notes: • Press MODE or / from the left keyboard to toggle between
pH buffer and temperature reading during calibration.
• Each time a buffer is confirmed, the new calibration parameters
replace the old calibration parameters of the corresponding buffer.
If current confirmed buffer has no correspondence in the existing stored
calibration and this is not full, the current buffer is added to the existing
stored calibration.
If the existing stored calibration is full (five calibration points), the instrument ask
which buffer will be replaced by current buffer.
Press the ARROW keys to select another buffer to be replaced.
Press CFM to confirm the buffer that will be replaced.
Press CAL to leave calibration without replacing.
Note: The replaced buffer is not removed from calibration list and it
can be selected for the next calibration points.
WORKING WITH CUSTOM BUFFERS
If at least one custom buffer was set in SETUP menu, it can be selected for
calibration by pressing the ARROW keys. Press 2nd then SET key if you
want to adjust the buffer value. The buffer value, displayed on the secondary
LCD, will start blinking.
Use the ARROW keys to change the buffer value.
After about 5 seconds you performed the last change, the buffer value is
updated. Press 2nd then SET key if you want to change it again.
Note: Custom buffer value can be adjusted in a ±1.00 pH window,
around the set value.
19
CLEAR CALIBRATION
Press CLR in any moment during calibration. The “CLEAR CAL” tag will appear
and “donE” message will be displayed on the secondary LCD.
All old calibrations, starting with current selected buffer are cleared and the
instrument continues calibration.
If CLR is pressed when “CLEAR CAL IF NEW ELECTRODE” message is displayed
blinking, the calibration history is deleted and the instrument will display
“hiSt” message on the primary LCD and “donE” message on the secondary
LCD, along with “CLEAR CAL” tags. The calibration process will continue
starting with 7.01 pH buffer as first buffer.
Note: If CLR is pressed during the first calibration point, the instrument
returns to measurement mode.
CLEAR CALIBRATION
Press CLR in any moment during calibration. The “CLEAR CAL” tag will appear
and “donE” message will be displayed on the secondary LCD.
All old calibrations, starting with current selected buffer are cleared and the
instrument continues calibration.
If CLR is pressed when “CLEAR CAL IF NEW ELECTRODE” message is displayed
blinking, the calibration history is deleted and the instrument will display
“hiSt” message on the primary LCD and “donE” message on the secondary
LCD, along with “CLEAR CAL” tags. The calibration process will continue
starting with 7.01pH buffer as first buffer.
Note: If CLR is pressed during the first calibration point, the instrument
returns to measurement mode.
ENHANCED CALIBRATION MESSAGES
The stored calibration history to used issue error and warning messages during
calibration to help ensure the highest accuracy.
As electrode aging is normally a slow process, substantial changes from previous
calibrations are likely due to a temporary problem with the electrode or buffers.
Calibrating under these conditions will result measurement errors.
ERROR MESSAGES
Error messages appear if one or all of the calibration parameters are out of
accepted windows. When these messages are displayed, calibration cannot
be confirmed.
WRONG BUFFER
This message appears when the difference between the pH reading and the
value of the selected buffer is too big. If this error message is displayed,
check if you have selected the proper calibration buffer.
20
WRONG BUFFER TEMPERATURE
This message appears if the temperature of the buffer is outside the defined
buffer temperature range.
WRONG & CONTAMINATED BUFFER / CHECK ELECTRODE
This message appears if the buffer used is contaminated or the electrode is
supposed to be either broken or very dirty.
WRONG & CHECK ELECTRODE / CLEAN ELECTRODE
This message appears if the electrode is supposed to be broken or very dirty.
WRONG & OLD / CLEAR CAL & OLD
This message appears as a result of an erroneous slope condition. If the slope
between current calibration point and one of the previous calibration, that
was not overriden in current calibration, exceeds slope window
(80% to 110%), this message will appear. Press CLR to clear old parameters
and continue calibration process or CAL to leave calibration.
WARNING MESSAGES
During calibration, the Calibration Check feature analyzes the electrode
calibration history and warns the user when problems have been detected. It
is possible to override the warning messages and confirm the calibration but
it is not recommended.
CLEAR CAL IF NEW ELECTRODE
This warning is displayed any time you enter calibration and calibration is not
cleared or the new calibration parameters are better than the previous ones. You
can clear calibration history by pressing CLR, or continue by pressing CAL.
CLEAN ELECTRODE
This warning message appears in order to alert the user that some dirt or
deposits could be on the electrode. Refer to the electrode Cleaning Procedure.
This ensures the removal of film, dirt or deposits on the glass bulb and
reference junction.
CONTAMINATED BUFFER
This warning message appears in order to alert that the buffer could be
contaminated. Refresh your buffer and continue the calibration procedure.
CHECK ELECTRODE / CHECK BUFFER
This warning message appears when the electrode slope exceeds the highest
accepted slope limit (110%). Check your electrode and use fresh buffers.
CLEAN ELECTRODE / CHECK BUFFER
This warning appears in order to alert the user that the electrode can be
dirty or the buffer contaminated. Refer to the electrode Cleaning Procedure
and use fresh buffers.
21
ELECTRODE CONDITION &
ELECTRODE RESPONSE TIME
When using an appropriate Hanna Instruments BNC electrode with pin, the
instrument will assess electrode condition and response time during each
calibration and will display the calibration status for the rest of the day.
The digital gauge for electrode condition is a representation of the offset
and slope performance of the electrode. The response gauge is a function
of the stabilization time between the first and second calibration buffers.
These gauges reflect electrode performance and should be expected to slowly
decrease over the life of the electrode.
The condition and response gauges show the electrode’s condition at the time
of calibration only and are displayed for the rest of the day the calibration
is performed. For a continuous display of electrode condition at the time
of calibration, daily calibration is necessary. The electrode condition and
response time are also visible when viewing GLP data.
If the instrument is not calibrated, it has been calibrated only in one point,
or if calibration history was deleted, the electrode condition and response
gauges will be empty.
When using an appropriate Hanna Instruments BNC electrode with pin, the
instrument will assess electrode condition and response time during each
calibration and will display the calibration status for the rest of the day.
The electrode response is evaluated only when calibration has been performed
using pH 7.01 or pH 6.86, pH 4.01 and pH 10.01 or pH 9.18 buffers. When
the instrument cannot evaluate the electrode response or pH 1.68/12.45
buffer was used as calibration buffer, the response gauge will be empty.
If the electrode is in a very poor condition, the first condition segment will blink. If
the electrode response is very slow, the first response segment will blink.
RELATIVE mV CALIBRATION
• Press CAL when the instrument is in RELATIVE mV measurement mode.
The relative mV value is displayed on the primary LCD and the absolute
mV value on the secondary LCD.
• Use the ARROW keys or the numerical keys if you want to change the
displayed relative mV value.
22
Notes: • Press MODE to select another resolution if the displayed value
allows it (e.g. if 199.9 is displayed, by pressing MODE the
value will change to 1999; if 19.9 is displayed, nothing will
happen if pressing MODE).
• Pressing CLR the displayed value is set to 0.0 mV.
• Press NUM from the left keyboard if you want to change the
value using the numerical keys. The “2nd” tag will blink.
• Press CLR to delete the last digit.
• Press MODE to select another resolution (see above).
• Press NUM again to leave the numerical keyboard.
• When the reading is stable, in mV range and the Relative mV offset is
inside the offset window (±2000 mV), “CFM” tag blinks.
• Press CFM to confirm relative mV calibration. The instrument will return
to measurement mode.
• If the absolute mV reading is out of range or the Relative mV offset is
out of the offset window, “WRONG” tag will blink. Change the input
value or the Relative mV offset to complete the calibration process.
GOOD LABORATORY PRACTICE (GLP)
GLP is a set of functions that allows storage and retrival of data regarding
the maintenance and status of the electrode.
All data regarding pH and Rel mV calibration is stored for the user to review
when necessary.
CALIBRATION ALARM TIME OUT
For pH calibration, all the instruments allow the user to set the number of
days before the next required pH calibration. This value can be set from 1
to 7 days. The default setting is OFF (disabled).
The instrument checks if the time-out has expired. If the time elapsed, “CAL
DUE” tags will blink as a reminder.
Note: If the instrument was not calibrated or all calibration parameters
were cleared, “CAL” “DUE” tags will be displayed even if the feature
is disabled in SETUP menu.
LAST pH CALIBRATION DATA
The last pH calibration data is stored automatically after a successful calibration.
To view the pH calibration data, press 2nd then GLP key or simply GLP from
the left keyboard (HI120) when the instrument is in pH (mV) measurement
mode.
23
The instrument will display the date (yyyy.mm.dd) of the last calibration.
Press the ARROW keys to view the next calibration parameter (pressing
the key):
• The time (hh:mm) of the last calibration.
• The pH calibration offset.
• The pH calibration slope (the GLP slope is the average of the calibration
slopes; the percentage is referred to the ideal value of 59.16 mV/pH).
24
• The calibration buffers in calibrating order, with the corresponding
warnings.
The first pH calibration buffer:
The second pH calibration buffer:
The third pH calibration buffer:
The fourth pH calibration buffer:
The fifth pH calibration buffer:
25
Notes: • The “OLd” message displayed beside the pH value means that this
buffer was not used during last calibration. Press 2nd then SET
key if you want to see calibration date (or time, if old calibration
was performed in the same day with current calibration).
• Each calibration buffer is displayed with the resolution from
calibration moment.
• If “no bUF” message appears on the LCD, the instrument informs
you that calibration was performed in less than five points.
• The Calibration Alarm Time Out status.
If disabled, or the number of days until the calibration alarm will be
displayed (e.g. 5 days), or from the time calibration expired
(e.g. –3 days).
• The instrument ID.
LAST RELATIVE mV CALIBRATION DATA
Last Relative mV calibration data is stored automatically after a successful
calibration.
To view the Relative mV calibration data, press 2nd then GLP key or simply GLP
from the left keyboard (HI120) while in Relative mV measurement mode.
The instrument will display the Relative mV GLP information.
• The date (yyyy.mm.dd) of the last calibration as in pH GLP mode.
Press the ARROW keys to view the next logged calibration parameter
(pressing the key):
• The Relative mV calibration offset and time (hh:mm) as in pH GLP mode.
• The instrument ID as in pH GLP mode.
26
Notes: • Press 2nd then GLP key at any moment and the instrument
will return to measurement mode.
• If calibration has not been performed, the instrument displays
“no CAL” message blinking.
SETUP
Setup mode allows viewing and modifying the following parameters:
• Calibration Alarm Time Out
• One-point calibration behaviour
• Custom Buffer 1
• Custom Buffer 2
• Alarm High Limit
• Alarm Low Limit
• AutoLOG Start Condition
• AutoLOG End Condition
• AutoLOG Interval
• Temperature Unit
• Current Date (yyyy.mm.dd)
• Current Time (hh:mm)
• Printing Language (HI122 only)
• Printer Status (HI122 only)
• Beep Status
• Baud Rate (serial communication)
• Command prefix (serial communication)
• Instrument ID
27
To enter SETUP mode, press 2nd then SET key, or simply SET from the
left keyboard (HI120 only), while the instrument is in measurement mode.
Select the desired setup parameter using the ARROW keys.
Press CAL if you want to change the item value. The selected item (e.g.
hour, in setting up the correct time) and “CFM” tag will start blinking.
Press the ARROW keys to change the displayed value or simply use the
numerical keys for all numerical parameters.
Note: To use the numerical keys, press NUM from the left keyboard. The
“2nd” tag will blink. Set the desired number digit by digit. The new
introduced digit is always the last one. All the previous digits will
shift to left.
To delete digits press CLR. Last introduced digit will be deleted and
the number will shift to right.
If there is another item to be set (e.g. minutes), press MODE or / from
the left keyboard. The other item will start blinking.
Press the ARROW keys to change the displayed value or simply use the
numerical keys for all numerical parameters.
Press CFM to confirm or CAL to escape.
Press the ARROW keys to select the next/previous parameter.
Press 2nd then SET key, or simply SET from the left keyboard (HI120 only)
to exit SETUP menu at any time. The instrument asks for printing a Setup
Report (HI122 only). Press CFM to print the Setup Report or CAL to return
to measurement mode.
The following table lists the SETUP parameters, their valid values range and
the factory settings (default):
28
Item
Description
Valid values
Default
CAL DUE Alarm Time Out
OFF or 1 to 7 days
OFF
1Pnt
Pnt or OFFS
Pnt
One-point cal. behaviour
Custom C1 Custom Buffer 1-2.00 to 16.00 pH
no
Custom C2 Custom Buffer 2-2.00 to 16.00 pH
no
AL.HI Alarm High Limit
pH/mV/RelmV ranges
no
AL.LO Alarm Low Limit
pH/mV/RelmV ranges
no
Strt
AutoLOG Start Condition
See Time/Date or “btn”
“btn”
End
AutoLOG End Condition
“dur”, “SAMP”, “rdG”
“dur”
Interval AutoLOG Interval
5 s to 180 min
5s
tEMP
Temperature Unit
ºC or ºF
ºC
Date
Date (yyyy.mm.dd)
2000.01.01 to 2099.12.31
Time
Time (hh:mm)
00:00 to 23:59
LAnG
Printing Language
EnG, ItA, ESP, FrA
Printer Status
ON/OFF
OFF
Beep Status
ON/OFF
OFF
bEEP
2004.01.01
English USA
bAUd Baud Rate
600; 1200; 2400; 4800; 9600
PrEF
Command Prefix
0 to 47
In Id
Instrument ID
0000 to 9999
29
00:00
2400
16
0000
Notes: • The custom buffers can be set only with 0.001 pH resolution. If
0.01 pH resolution is selected during calibration, the displayed
custom buffer value is a rounded one.
• For calibration alarm time out, custom buffers, alarm limits,
start and stop condition items, if pressing CLR while in changing
mode, the selected item will be set to default.
• Printer status and printing language items appear only for
HI122. The available printing languages are: EnG (English),
ItA (Italiano), ESP (Español) and FrA (Français).
ALARMS SETUP
• Select one of the alarm items. The displayed alarm value will be the
previous set one.
• Press MODE to select the range for alarm. The corresponding range tag
will blink.
• Press CAL to enter in changing mode. Set the new value using the
ARROW or the numerical keys.
Notes: • Press MODE while in changing mode to select another resolution
if the displayed value allows it (e.g. if 199.9 is displayed, by
pressing MODE the value will change to 1999; if 19.9 is
displayed, nothing will happen if pressing MODE).
• Pressing CLR the displayed value will be set to default (“no”).
The first displayed value after “no”, if one of the ARROW keys
is pressed, will be 7.00 pH or 0.0 mV, according to the selected
range.
• Press NUM from the left keyboard if you want to change the
value using the numerical keys. The “2nd” tag will blink.
• Press CLR to delete the last digit.
• Press MODE to select another resolution (see above).
• Press NUM or CFM to confirm the introduced value from the
numerical keyboard.
When in normal measurement mode:
• If only “AL.LO” item is set, the instrument will beep when the reading
is below alarm low value.
• If only “AL.HI” item is set, the instrument will beep when the reading
is above alarm high value.
• If both alarms are set, the instrument will beep when the reading is above
alarm high value or below alarm low value.
Note: If “AL.HI” item is less than or equal to “AL.LO” item, “WRONG”
tag will blink.
30
AutoLOG SETUP
AutoLOG Start Condition
• Select the “Strt” item. The displayed AutoLOG start condition will be the
previous set one. The default value is “btn” – button (start with key).
• Press and keep hold down MODE while in view mode, when time is
displayed, to view the set date.
• If pressing CAL while in view mode, the start time will be displayed.
Notes: • Pressing CLR while in changing mode, the start condition will
be set to default (“btn”).
• The first displayed value after “btn” will be the current time/date.
AutoLOG End Condition
• Select the “End” item. The displayed AutoLOG end condition will be the
previous set one. One of the following options will be available: “dur”
(duration), “SAMP” (samples number), “rdG” (reading limits).
• Pressing MODE while in view mode, the instrument will display one of
the options: “dur”, “SAMP”, “rdG” & “pH”, “rdG” & “mV”, “rdG” &
“Rel mV”.
• Pressing CAL, the instrument will enter in changing mode in according
with the selected option and will display one of the following messages:
• “dur” on the secondary LCD and duration (hh:mm) on the primary
LCD, along with “TIME” tag. The default value is 3 hours. The duration
can be set from 1 minute to 199 hours and 59 minutes.
Note: Pressing CLR while in changing mode, the end condition value
will be set to default (3 hours).
• “SAMP” on the secondary LCD and sample number on the primary
LCD. The default value is 1000 samples.
Note: Pressing CLR while in changing mode, the end condition value
will be set to default (1000 samples).
• “rdG” on the secondary LCD and last set limit value on the primary
LCD, with the corresponding range tag blinking. The default value is
7.00 pH or 0.0 mV, in according with the selected range.
Notes: • Pressing MODE while in view mode, another resolution
is selected.
• Pressing CLR while in changing mode, the end condition
will be set to default (7.00 pH or 0.0 mV).
The AutoLOG will be started in according with “Strt” item, from button (“btn”)
by pressing AutoLOG or when the starting time condition is reached.
The AutoLOG will stop in according with the selected option for “AutoLOG
End Condition” item or when AutoLOG is pressed.
31
LOGGING
This feature allows the user to log pH and Rel mV, together with temperature au‑
tomatically. All logged data can be transferred to a PC through the RS232 port.
The maximum logging space is 1000 record locations (samples). This can
be divided in 1 up to 50 lots (one lot can use all the free space). The lot
ID (number) is between 1 and 99 (after 99 it restarts from 1). Only up to
50 lots can be memorized at one time, even if there is free space available.
Note: When the logged lots are more than one, the total number of
samples can be less than 1000, even with full memory, due to the
fact that logging memory is divided in pages of 20 samples each.
The appropriate logging interval can be set from 5 seconds to 180 minutes
(see SETUP for details, page 27).
Up to 50 record locations are also provided.
LOGGING THE CURRENT DATA (LOG ON DEMAND)
To store the current reading into memory, press LOG
while in measurement mode.
LOG
The instrument will display the current date (mm.dd)
on the primary LCD, the record number on the secondary LCD, the “LOG” tag
blinking for a few seconds and then the free locations number.
If there are less than 6 memory locations remaining, the record number and
“Lo” message will blink for a few seconds to alert the user and then the
free locations number is displayed on the LCD.
If the LOG space is full, “FULL LOC” message will be displayed on the LCD
for a few seconds with “LOG” tag blinking, and then ”FrEE 0” message.
32
The instrument returns to normal measurement mode.
AutoLOGGING
The setable AutoLOG modes make these instruments very useful in a wide
range of applications:
• Start at button or set time/date; stop after a set duration.
• Start at button or set time/date; stop when a set value is reached.
• Start at button or set time/date; stop when a set sample number is reached.
To start autologging using the keyboard, press 2nd then AutoLOG key
or simply AutoLOG from the left keyboard while the instrument is in
measurement mode.
The instrument will display for a few seconds the lot number on the primary LCD
and the AutoLOG interval on the secondary LCD, together with “AutoLOG” tag.
Notes: • For the other AutoLOG modes, the autologging starts/stops
automatically after the set start/stop condition in SETUP menu
is reached and the stop condition is correct.
• The “AutoLOG” tag will blink if one of these modes is selected
and the start condition is not reached.
After data logging is started, the current value is displayed on the primary
LCD and the temperature on the secondary LCD, along with “AutoLOG” tag.
33
To stop autologging, press 2nd then AutoLOG key again, or simply AutoLOG
from the left keyboard.
The instrument will display for a few seconds the lot number on the primary
LCD and the sample number on the secondary LCD, together with “AutoLOG”
tag, and will return to measurement mode.
Notes: • If printer is ON, each logged sample is printed only if the
AutoLOG interval is at least 30 s (HI122 only).
• If the AutoLOG pages are full, the “FULL LOC” message will be
displayed on the LCD, as in Log on demand mode.
VIEW LOGGED DATA
Press RCL to retrieve the information stored while in measurement mode.
If no data were logged, the instrument displays:
Otherwise, the instrument will display the last pH or Rel mV memorized
reading on the primary LCD and the lot number on the secondary LCD.
Note: If LOG mode was invoked while the instrument was in
mV/Relative mV measurement range, the corresponding memorized
reading will be displayed on the primary LCD, along with “RelmV” tag.
34
Press 2nd then SET key while in RECALL mode and the instrument will toggle
between the lot or record number on the secondary LCD. Use the ARROW
keys to select another lot or record.
Press MODE or from the left keyboard and the instrument will display
the next logged parameter as shown in the table below:
Parameter
Primary LCD
Secondary LCD
mV
mV reading
Temperature
TIME
Hour & minutes
Seconds
DATE
Year
Month & day
OFFSET
Offset value
Lot (or record) number
SLOPE
Slope Value
Lot (or record) number
from the left keyboard, the previous logged
Notes: • If pressing
parameter will be displayed.
• If in Rel mV RECALL mode regarding the slope, the instrument
will display “----” message on the primary LCD.
• The record number refers to an identification number inside a lot.
Last displayed parameter is “dEL” message on the primary LCD and the lot
number on the secondary LCD.
Notes: • The “LdM” message on the secondary LCD shows that data has
been stored in Log on demand mode.
•Pressing 2nd then SET key, the instrument toggles between lot
number, record number (Log on demand only) or all lots.
• Press CLR to delete the selected lot/record or all lots.
Note: Positions remain free in the Log on demand lot by deleting the
last logged samples or all the lot.
• If “dEL ALL” option was selected, all logged data is deleted and the
instrument returns to measurement mode.
Press RCL at any time to return to measurement mode.
35
AutoHOLD
To freeze the first stable reading on the LCD, press 2nd then AutoHOLD
key, or simply AutoHOLD from the left keyboard while the instrument is
in measurement mode. The “Auto” ”HOLD” tags will be displayed blinking
on the LCD until the reading will stabilize.
When the reading is stable, the “Auto” “HOLD” tags stop blinking and the
reading is frozen.
Press 2nd then AutoHOLD key again, or simply AutoHOLD from the left
keyboard to return to normal measurement mode.
Note: Pressing MODE or the specific range keys from the left keyboard, the
instrument will skip to the displayed range, without leaving AutoHOLD
mode. The LOG key also holds AutoHOLD mode.
Pressing 2nd then SET, GLP or RCL key, the instrument leaves
AutoHOLD mode and performs the selected function.
PRINTING (HI122 only)
A complete set of information based on the measured, set or recorded data
can be printed.
Data can be printed on demand (for current reading in measurement mode,
GLP and SETUP modes) by pressing 2nd then Print key, or simply Print from
the left keyboard, or automatic (for AutoLOG and Log on demand modes).
Automatic data printing is possible in AutoLOG mode only if the printer is
ON and the AutoLOG interval is greater than 30 seconds.
Note: To cancel printing, press 2nd then Print key again or simply
Print from the left keyboard.
When in pH measurement mode,
the printout provides the following
information:
36
Note: For Relative mV measurement mode, the Rel. mV value will be
printed.
When in GLP mode, the printout provides the following information:
• For pH range:
• For Rel mV range:
When in SETUP mode, the following information can be printed:
• If 2nd then Print key are the first
keys pressed after entering SETUP
mode, a SETUP table of contents
will be printed:
37
• When exiting SETUP mode, the instrument asks if a SETUP REPORT shall
be printed. The “Prn” message will be displayed on the LCD, together
with “ ” tag and “CFM” tag blinking.
• Press CFM to print the SETUP
REPORT or CAL to escape without
printing.
When in SETUP mode, if pressing CAL,
then Print for a chosen parameter, a
help printout will come out, providing
the following information (e.g. AutoLOG
Interval):
38
When in LOG mode, a printout will automatically come out, providing the
following information:
• For pH/mV Log on demand:
• For AutoLOG mode:
Note: If selecting a different printing language, all data will be printed
in the selected language.
39
TEMPERATURE CALIBRATION
(for technical personnel only)
All the instruments are factory calibrated for temperature.
Hanna Instruments’ temperature probes are interchangeable and no tem‑
perature calibration is needed when they are replaced.
If the temperature measurements are inaccurate, temperature recalibration
should be performed.
For an accurate recalibration, contact your local Hanna Instruments Office,
or follow the instructions below.
• Prepare a vessel containing ice and water and another one containing
hot water (at approximately 50 ºC or 122 ºF). Place insulation material
around the vessels to minimize temperature changes.
• Use a calibrated thermometer with a resolution of 0.1 ºC or 0.1 ºF as a
reference thermometer. Connect the HI7662-T temperature probe to the
appropriate socket.
• With the instrument off, press and hold down the CAL & keys, then
power on the instrument. The “CAL” tag will appear and the secondary
LCD will show 0.0 ºC or 32.0 ºF. The primary LCD will display the mea‑
sured temperature or the ”----” message, if the measured temperature
is out of range.
• Immerse the temperature probe into the vessel with ice and water as
close as possible to the reference thermometer. Allow a few seconds for
the probe to stabilize.
• Use the ARROW keys to set the reading on the secondary LCD to that of
ice and water, measured by the reference thermometer. When the reading is
stable and close to the selected calibration point, “CFM” tag will blink.
• Press CFM to confirm. The secondary LCD will display
CFM
50.0 ºC or 122.0 ºF.
• Immerse the temperature probe into the second vessel
as close as possible to the reference thermometer. Allow a few seconds
for the probe to stabilize.
• Use the ARROW keys to set the reading on the secondary LCD to that
of the hot water.
• When the reading is stable and close to the selected calibration point,
“CFM” tag will blink.
40
• Press CFM to confirm. The instrument returns to
measurement mode.
Note: If the reading is not close to the selected
calibration point, “WRONG” tag will blink. Change
the temperature probe and restart calibration.
CFM
mV CALIBRATION
(for technical personnel only)
All the instruments are factory calibrated for mV.
Hanna Instruments’ ORP electrodes are interchangeable and no mV calibra‑
tion is needed when they are replaced.
If the measurements are inaccurate, mV recalibration should be performed.
For an accurate recalibration, contact your local Hanna Instruments Office,
or follow the instructions below.
A two or three-point calibration can be performed at 0.0 mV, 600.0 mV
and 1800.0 mV.
• Attach to the BNC connector (#6 on page 4 and 5) a mV simulator with
an accuracy of ±0.1 mV.
• With the instrument off, press and hold down the CFM & LOG keys, then
power on the instrument. The “CAL” tag will appear and the secondary
LCD will show 0.0 mV.
• Set 0.0 mV on the simulator. When the reading is stable and close to
the selected calibration point, “CFM” tag will blink.
• Press CFM to confirm. The secondary LCD will display 600 mV.
• Set 600.0 mV on the simulator. When the reading is stable and close
to the selected calibration point, “CFM” tag will blink.
• Press CFM to confirm. The secondary LCD will display 1800 mV.
• Set 1800.0 mV on the simulator. When the reading is stable and close
to the selected calibration point, “CFM” tag will blink.
• Press CFM to confirm. The instrument returns to measurement mode.
Notes: • If the reading is not close to the selected calibration point,
“WRONG” tag will blink. Verify calibration condition or contact
your vendor if you can not calibrate.
• Press CAL in any moment of the calibration process. The instru‑
ment will return to measurement mode. If calibration process
is stopped after 600 mV is confirmed, the 600 mV range is
calibrated and calibration parameters are memorized.
41
PC INTERFACE
Data transmission from the instrument to the PC can be done with the
HI92000 Windows® compatible software (optional). HI92000 also offers
graphing and on-line help feature.
Data can be exported to the most popular spreadsheet programs for further
analysis.
To connect your instrument to a PC, use the optional Hanna Instruments
HI920010 cable connector. Make sure that your instrument is switched off
and plug one connector to the instrument’s RS232C socket and the other
to the serial port of your PC.
To allow our users access to the latest version of Hanna Instruments PC
compatible software, we made the products available for download at http://
software.hannainst.com. Select the product code and click Download Now.
After download is complete, use the setup.exe file to install the software.
Notes: • Other cables than HI920010 may use a different configuration.
In this case, communication between instrument and PC may
not be possible.
• If you are not using Hanna Instruments HI92000 software,
please see the following instructions.
SENDING COMMANDS FROM PC
It is also possible to remotely control the instrument with any terminal program.
Use HI920010 cable to connect the instrument to a PC, start the terminal
program and set the communication options as follows: 8, N, 1, no flow
control.
COMMAND TYPES
To send a command to the instrument the scheme is:
<command prefix> <command> <CR>
where:
<command prefix> is a selectable ASCII character
between 0 and 47 (default 16).
<command> is the command code.
Note: Either small or capital letters can be used.
SIMPLE COMMANDS
MOD
Is equivalent to pressing MODE
CAL
Is equivalent to pressing CAL
CFM
Is equivalent to pressing CFM
UPC
Is equivalent to pressing the UP arrow key
DWC
Is equivalent to pressing the DOWN arrow key
LOG
Is equivalent to pressing LOG
RCL
Is equivalent to pressing RCL
ALG
Is equivalent to pressing AutoLOG
SET
Is equivalent to pressing SET
PRT
Is equivalent to pressing PRINT (HI122 only)
CLR
Is equivalent to pressing CLR
OFF
Is equivalent to pressing OFF
AHD
Is equivalent to pressing AutoHOLD
42
CHR xx
Change the instrument’s range according to the parameter ‘s
value (xx):
• xx=00 pH range/0.001 resolution
• xx=01 pH range/0.01 resolution
• xx=03 mV range
• xx=04 Relative mV range
The meter will answer for these commands with:
<STX> <answer> <ETX>
where:
<STX> is 02 ASCII code character (start of text)
<ETX> is 03 ASCII code character (end of text)
<answer>:
<ACK> is 06 ASCII code character (recognized command)
<NAK> is 21 ASCII code character (unrecognized command)
<CAN> is 24 ASCII code character (corrupted command)
COMMANDS REQUIRING AN ANSWER
Causes the instrument to send a complete set of readings
according to the current range:
• pH, mV and temperature reading on pH range.
• mV and temperature reading on mV range.
• Rel mV, absolute mV and temperature reading on Rel
mV range.
Note: The temperature is sent with two decimals and in Celsius degrees,
even if the set temperature unit was Fahrenheit degrees.
DA?
Requests the date.
TI?
Requests the time.
MDR
Requests the instrument’s model name and firmware code.
GLP
Requests the calibration data record.
PAR
Requests the setup parameters setting.
NSL
Requests the number of logged samples.
?ML
Requests the information about AutoLOG.
/MLPxxx Selects the lot.
?DM
Downloads the selected AutoLOG.
LODPxxx Requests the xxxth record logged data.
LODPALL Requests all Log on demand.
Notes: • “Err8” is sent if the instrument is not in measurement mode.
• “Err7” is sent if a different range is requested during AutoLOGGING
mode (for CHR xx command only).
• “Err6” is sent if the requested range is not available.
• “Err4” is sent if the requested set parameter is not available.
• “Err3” is sent if the Log on demand is empty.
• Invalid commands will be ignored.
RAS
43
pH BUFFER TEMPERATURE
DEPENDENCE
Temperature has an effect on pH. The calibration buffer solutions are affected
by temperature changes to a lesser degree than normal solutions.
During calibration the instrument will automatically calibrate to the pH value
corresponding to the measured or set temperature.
TEMP
pH BUFFERS
ºC
ºF
1.679
4.010
6.862
7.010
9.177
10.010
12.454
0
32
1.670
4.007
6.982
7.130
9.459
10.316
13.379
5
41
1.670
4.002
6.949
7.098
9.391
10.245
13.178
10
50
1.671
4.000
6.921
7.070
9.328
10.180
12.985
15
59
1.673
4.001
6.897
7.046
9.273
10.118
12.799
20
68
1.675
4.004
6.878
7.027
9.222
10.062
12.621
25
77
1.679
4.010
6.862
7.010
9.177
10.010
12.450
30
86
1.683
4.017
6.851
6.998
9.137
9.962
12.286
35
95
1.688
4.026
6.842
6.989
9.108
9.919
12.128
40
104
1.693
4.037
6.837
6.983
9.069
9.881
11.978
45
113
1.700
4.049
6.834
6.979
9.040
9.847
11.834
50
122
1.707
4.062
6.834
6.978
9.014
9.817
11.697
55
131
1.715
4.076
6.836
6.979
8.990
9.793
11.566
60
140
1.724
4.091
6.839
6.982
8.969
9.773
11.442
65
149
1.734
4.107
6.844
6.987
8.948
9.757
11.323
70
158
1.744
4.123
6.850
6.993
8.929
9.746
11.211
75
167
1.755
4.139
6.857
7.001
8.910
9.740
11.104
80
176
1.767
4.156
6.865
7.010
8.891
9.738
11.003
85
185
1.780
4.172
6.873
7.019
8.871
9.740
10.908
90
194
1.793
4.187
6.880
7.029
8.851
9.748
10.819
95
203
1.807
4.202
6.888
7.040
8.829
9.759
10.734
During calibration the instrument will display the pH buffer value at 25 ºC (77 ºF).
44
ELECTRODE CONDITIONING
& MAINTENANCE
PREPARATION PROCEDURE
Remove the protective cap of the pH electrode.
DO NOT BE ALARMED IF SALT DEPOSITS ARE PRESENT. This is normal with
electrodes. They will disappear when rinsed with water.
During transport, tiny bubbles of air may form inside the glass bulb affect‑
ing proper functioning of the electrode. These bubbles can be removed by
“shaking down” the electrode as you would do with a glass thermometer.
If the bulb and/or junction is dry, soak the electrode in HI70300 or
HI80300 Storage Solution for at least one hour.
For refillable electrodes:
If the filling solution (electrolyte) is more than 2½ cm (1”) below the fill
hole, add HI7082 or HI8082 3.5M KCl Electrolyte Solution for double
junction or HI7071 or HI8071 3.5M KCl+AgCl Electrolyte Solution for
single junction electrodes.
For faster response, unscrew the fill hole screw during measurements.
For AmpHel® electrodes:
If the electrode does not respond to pH changes, the battery is run down
and the electrode should be replaced.
45
MEASUREMENT
Rinse the pH electrode tip with distilled water. Immerse the tip (bottom
4 cm /1½”) in the sample and stir gently for a few seconds.
For a faster response and to avoid cross-contamination of the samples,
rinse the electrode tip with a few drops of the solution to be tested, before
taking measurements.
Make sure the sleeve holes of the ORP probe are completly submerged. Tap
the probe repeatedly to remove any air bubbles that may be trapped inside
the sleeve.
STORAGE PROCEDURE
To minimize clogging and assure a quick response time, the glass bulb and
the junction of pH electrode should be kept moist and not allowed to dry out.
Replace the solution in the protective cap with a few drops of HI70300
or HI80300 Storage Solution or, in its absence, Filling Solution (HI7071
or HI8071 for single junction and HI7082 or HI8082 for double junction
electrodes). Follow the Preparation Procedure on page 45 before taking
measurements.
Note: NEVER STORE THE ELECTRODE IN DISTILLED OR DEIONIZED WATER.
PERIODIC MAINTENANCE
Inspect the electrode and the cable. The cable used for connection to the
instrument must be intact and there must be no points of broken insulation
on the cable or cracks on the electrode stem or bulb. Connectors must be
perfectly clean and dry. If any scratches or cracks are present, replace the
electrode. Rinse off any salt deposits with water.
pH Probe Maintenance
For refillable electrodes:
Refill the reference chamber with fresh electrolyte (HI7071 or HI8071 for
single junction or HI7082 or HI8082 for double junction electrodes). Allow
the electrode to stand upright for 1 hour.
Follow the Storage Procedure above.
pH CLEANING PROCEDURE
• General
Soak in Hanna Instruments HI7061 or HI8061
General Cleaning Solution for approximately ½ hour.
• Protein
Soak in Hanna Instruments HI7073 or HI8073
Protein Cleaning Solution for 15 minutes.
Soak in Hanna Instruments HI7074 Inorganic
Cleaning Solution for 15 minutes.
Rinse with Hanna Instruments HI7077 or
HI8077 Oil and Fat Cleaning Solution • Inorganic
• Oil/grease
46
IMPORTANT: After performing any of the cleaning procedures, rinse the
electrode thoroughly with distilled water, refill the reference chamber with
fresh electrolyte (not necessary for gel-filled electrodes) and soak the elec‑
trode in HI70300 or HI80300 Storage Solution for at least 1 hour before
taking measurements
PRINTER MAINTENANCE
(HI122 only)
HI122 instrument uses plain paper rolls 44 mm width. To insert a new paper
roll, follow the procedure below:
• For an easier insertion, cut the paper edge as shown in the next figure:
• Put the paper roll on the paper holder attached to the printer.
CUT
• Insert the paper edge into the printer slot as shown below:
INSERT
• Simply press Paper from the left keyboard to feed
the printer. Allow about 5 cm (2”) to exit from the
printer.
• Tear the paper out for its edge to be straight, as shown below:
TEAR
The paper is now properly inserted and the printer is ready to print.
47
TROUBLESHOOTING GUIDE
SYMPTOM
PROBLEM
SOLUTION
Slow response/
excessive drift.
Dirty pH electrode.
Soak the electrode tip in
HI7061 solution for 30
minutes and then clean
the electrode.
Readings
fluctuate up and
down (noise).
Clogged/dirty junction.
Low electrolyte level
(refillable electrodes
only).
Clean the electrode.
Refill with fresh solution
(for refillable electrodes
only).
The display shows Out of range in the pH
blinking dashes
scale.
during pH
measurements.
Make sure the pH sam‑
ple is in the specified
range. Recalibrate.
Check the electrolyte lev‑
el and the general state
of the pH electrode.
The display shows Reading out of range.
blinking reading
during
measurement.
Electrode not connected.
Out of range in
the mV scale.
Dry membrane/
junction.
Soak in HI70300
Storage solution for at
least one hour.
The meter does
not work with
the temperature
probe.
Out of order tempera‑
ture probe.
Replace the probe.
The meter fails to
calibrate or gives
faulty readings.
Broken or out of order
pH electrode.
Replace the electrode.
Explicit warnings
are displayed
during pH cali‑
bration.
Dirty/broken pH elec‑
trode, contaminated
reference or buffers.
Follow displayed
instructions.
The electrode
condition and
response gauges
are not displayed
after calibration.
Electrode without
pin or pin is not con‑
nected.
Use Hanna Instruments
P type pH electrode and
check the pin
connection.
SYMPTOMS
48
TROUBLESHOOTING GUIDE (cont.)
SYMPTOM
PROBLEM
SOLUTION
The electrode con‑
dition and response
gauges are empty
The meter has not
been calibrated on
the current day.
Only one-point
calibration has
been performed.
Perform a two-point
calibration procedure.
Calibrate using
pH7.01 and pH4.01
buffers.
The meter displays
empty Electrode
Response scale.
Not enough data
available to eval‑
uate the response
time.
Repeat calibration
more carefully.
At startup the meter
displays all LCD
permanently.
One of the keys is
blocked.
Check the keyboard or
contact the vendor.
Long beep heard
when pressing a
key.
Key without
function in current
mode.
End of range
reached with the
ARROW keys.
Don’t press keys
without function in
current mode.
Digits can not be
introduced with the
numeric keys.
Maximum value
reached for corre‑
sponding range.
Delete digits.
“Prn Eror” message
displayed.
Printer error.
Turn off the meter
and then turn it on.
If the error persists,
contact the vendor.
“Err xx” error mes‑
sage displayed.
Internal error.
Turn off the meter
and then turn it on.
If the error persist,
contact the vendor.
SYMPTOM
49
TEMPERATURE CORRELATION
FOR pH SENSITIVE GLASS
The resistance of glass electrodes partially depends on the temperature. The
lower the temperature, the higher the resistance. It takes more time for the
reading to stabilize if the resistance is higher. In addition, the response time
will suffer to a greater degree at temperatures below 25 ºC (77 ºF).
Since the resistance of the pH electrode is in the range of 50 – 200 Mohm,
the current across the membrane is in the pico Ampere range. Large currents
can disturb the calibration of the electrode for many hours.
For these reasons high humidity environments, short circuits and static
discharges are detrimental to a stable pH reading.
The pH electrode’s life also depends on the temperature. If constantly used
at high temperatures, the electrode life is drastically reduced.
Typical Electrode Life
Ambient Temperature
90 ºC (194 ºF)
120 ºC (248 ºF)
1 – 3 years
Less than 4 months
Less than 1 month
Alkaline Error
High concentrations of sodium ions interfere with readings in alkaline
solutions. The pH at which the interference starts to be significant depends
upon the composition of the glass. This interference is called alkaline
error and causes the pH to be underestimated. Hanna Instruments’ glass
formulations have the indicated characteristics.
Sodium Ion Correction for the Glass at 20-25 ºC (68-77 ºF)
Concentration
pH
Error
0.1 Mol L-1 Na+
13.00
0.10
13.50
0.14
14.00
0.20
12.50
0.10
13.00
0.18
1.0 Mol L-1 Na+
13.50
0.29
14.00
0.40
50
ACCESSORIES
pH BUFFER SOLUTIONS
HI70004P
pH4.01 Buffer Sachets, 20 mL, 25 pcs.
HI70007P
pH7.01 Buffer Sachets, 20 mL, 25 pcs.
HI70010P
pH10.01 Buffer Sachets, 20 mL, 25 pcs.
HI7001L
pH1.68 Buffer Solution, 500 mL bottle
HI7004L
pH4.01 Buffer Solution, 500 mL bottle
HI7006L
pH6.86 Buffer Solution, 500 mL bottle
HI7007L
pH7.01 Buffer Solution, 500 mL bottle
HI7009L
pH9.18 Buffer Solution, 500 mL bottle
HI7010L
pH10.01 Buffer Solution, 500 mL bottle
HI7001L
pH1.68 Buffer Solution in FDA approved bottle, 500 mL
HI8004L
pH4.01 Buffer Solution in FDA approved bottle, 500 mL
HI8006L
pH6.86 Buffer Solution in FDA approved bottle, 500 mL
HI8007L
pH7.01 Buffer Solution in FDA approved bottle, 500 mL
HI8009L
pH9.18 Buffer Solution in FDA approved bottle, 500 mL
HI8010L
pH10.01 Buffer Solution in FDA approved bottle, 500 mL
ELECTRODE STORAGE SOLUTIONS
HI70300L
Storage Solution, 460 mL bottle
HI80300L
Storage Solution in FDA approved bottle, 460 mL
ELECTRODE CLEANING SOLUTIONS
HI70000P
Electrode Rinse Sachets, 20 mL, 25 pcs.
HI7073L
Protein Cleaning Solution, 460 mL bottle
HI7074L
Inorganic Cleaning Solution, 460 mL bottle
HI7077L
Oil & Fat Cleaning Solution, 460 mL bottle
HI8073L
Protein Cleaning Solution in FDA approved bottle,
460 mL
HI8077L
Oil & Fat Cleaning Solution in FDA approved bottle,
460 mL
51
ELECTRODE REFILL ELECTROLYTE SOLUTIONS
HI7071
3.5M KCl + AgCl Electrolyte, 4x30 mL, for single
junction electrodes
HI7072
1M KNO3 Electrolyte, 4x30 mL
HI7082
3.5M KCl Electrolyte, 4x30 mL, for double junction
electrodes
HI8071
3.5M KCl + AgCl Electrolyte in FDA approved bottle,
4x30 mL, for single junction electrodes
HI8072
1M KNO3 Electrolyte in FDA approved bottle, 4x30 mL
HI8082
3.5M KCl Electrolyte in FDA approved bottle, 4x30 mL,
for double junction electrodes
ORP PRETREATMENT SOLUTIONS
HI7091L
Reducing Pretreatment Solution, 460 mL bottle
HI7092L
Oxidizing Pretreatment Solution, 460 mL bottle
pH ELECTRODES
All electrodes with code ending with P are supplied with BNC & pin connectors
and 1 m (3.3’) cable, as shown below:
HI1043P
Glass-body, double junction, refillable, combination pH electrode.
Use: strong acid/alkali.
HI1043
52
HI1053P
Glass-body, triple ceramic, conic shape, refillable, combination pH electrode.
Use: emulsions.
HI1053
HI1131P
Glass-body, double junction, refillable, combination pH electrode.
Use: general purpose.
HI1131
HI1083P
Glass-body, micro, Viscolene, non-refillable, combination pH electrode.
Use: biotechnology, micro titration.
HI1083
HI1330P
Glass-body, semimicro, single junction, refillable, combination pH electrode.
Use: laboratory, vials.
HI1330
HI1332P
Plastic-body (Ultem®), double junction, refillable, combination pH electrode.
Use: general purpose.
HI1332
53
ORP ELECTRODES
HI3131P
Glass-body, refillable, combination platinum ORP electrode.
Use: titration.
HI3131
Consult the Hanna General Catalog for more electrodes with BNC and pin
connectors.
OTHER ACCESSORIES
HI710005
Voltage adapter from 115 VAC to 12 VDC (USA plug)
HI710006
Voltage adapter from 230 VAC to 12 VDC
(European plug)
HI710012
Voltage adapter from 240 VAC to 12 VDC
(UK plug)
HI710013
Voltage adapter from 230 VAC to 12 VDC
(South African plug)
HI710014
Voltage adapter from 230 VAC to 12 VDC
(Australian plug)
HI8427
pH and ORP electrode simulator with 1 m (3.3’) coaxial
cable ending in female BNC connectors
HI931001
pH and ORP electrode simulator with LCD and 1m
(3.3’) coaxial cable ending in female BNC connectors
HI7662-T
Temperature probe with 1 m (3.3’) cable
HI710032
Pack of 10 plain paper spare rolls (HI122)
HI710033
Replacement ink cartridge (HI122)
HI740157
Plastic electrode refilling pipette (20 pcs.)
HI92000
Windows® compatible software
HI920010
9 to 9-pin RS232 cable
54
RECOMMENDATIONS FOR USERS
Before using this product, make sure it is entirely suitable for your specific application
and for the environment in which it is used. Any variation introduced by the user to
the supplied equipment may degrade the meters' performance. For yours and the
meter's safety do not use or store the meter in hazardous environments.
CERTIFICATION
All Hanna Instruments conform to the CE European Directives.
Disposal of Electrical & Electronic Equipment. The product should not be treated
as household waste. Instead hand it over to the appropriate collection point for the
recycling of electrical and electronic equipment which will conserve natural resources.
Disposal of waste batteries. This product contains batteries, do not dispose of them
with other household waste. Hand them over to the appropriate collection point for
recycling.
Ensuring proper product and battery disposal prevents potential negative
consequences for the environment and human health. For more information, contact
your city, your local household waste disposal service, the place of purchase or go to
www.hannainst.com.
WARRANTY
HI120 and HI122 are guaranteed for two years against defects in workmanship
and materials when used for their intended purpose and maintained according to
instructions. Electrodes and probes are guaranteed for six months. This warranty is
limited to repair or replacement free of charge.
Damage due to accidents, misuse, tampering or lack of prescribed maintenance
is not covered.
If service is required, contact your local Hanna Instruments Office. If under warranty,
report the model number, date of purchase, serial number and the nature of the
problem. If the repair is not covered by the warranty, you will be notified of the
charges incurred. If the instrument is to be returned to Hanna Instruments, first obtain
a Returned Goods Authorization number from the Technical Service department and
then send it with shipping costs prepaid. When shipping any instrument, make sure
it is properly packed for complete protection.
All rights are reserved. Reproduction in whole or in part is prohibited without the
written consent of the copyright owner.
Hanna Instruments reserves the right to modify the design, construction or
appearance of its products without advance notice.
55
World Headquarters
Hanna Instruments Inc.
Highland Industrial Park
584 Park East Drive
Woonsocket, RI 02895 USA
www.hannainst.com
Printed in ROMANIA
MAN122 06/19
56
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