Hanna 210211212123 pH Bench Meters

Hanna 210211212123 pH Bench Meters
Instruction Manual
pH 210
pH 212
pH 211
pH 213
Microprocessor-based
pH/mV/°C
Bench Meters
CAL
Func
CFM
MEM
MR
C
C
RS232
MEM
tions
Memo
Memo
rize Re
RANG
ry Re
call
E Se
lect pH
COMM
/
Comm
ading
pH Ca
CAL
ORP
unica
tion
libratio
n
Start
Calib
ration
Selec
t 1 stBu
ffer
RANG
rm 1 st
Buffe
E
Selec
r
t 2 ndBu
ffer
Confi
rm 2 nd
Buffe
r CO
/
CFM
/
MR
CFM
Confi
pH
Micro213
proce
ssor
pH M
eter
MM
w w w. h a n n a i n s t . c o m
1
Dear Customer,
Thank you for choosing a Hanna Instruments product.
Please read this instruction manual carefully before using the instruments.
This manual will provide you with the necessary information for correct use of
the instruments, as well as a precise idea of their versatility.
If you need additional technical information, do not hesitate to e-mail us at
tech@hannainst.com or turn the back cover for our worldwide contact list.
These instruments are in compliance with
directives.
WARRANTY
pH 210, pH 211, pH 212 and pH 213 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 the dealer from whom you purchased the instrument.
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.
TABLE OF CONTENTS
WARRANTY .................................................................................. 2
PRELIMINARY EXAMINATION ........................................................ 3
GENERAL DESCRIPTION ................................................................ 3
FUNCTIONAL DESCRIPTION pH 210 AND pH 211 ......................... 4
pH 210 AND pH 211 SPECIFICATIONS ........................................ 5
FUNCTIONAL DESCRIPTION pH 212 AND pH 213 ......................... 6
pH 212 AND pH 213 SPECIFICATIONS ........................................ 7
OPERATIONAL GUIDE ................................................................... 8
pH CALIBRATION ....................................................................... 11
TEMPERATURE CALIBRATION (for technical personnel only) ........... 14
mV CALIBRATION (pH 213 only) (for technical personnel only) .... 16
PC INTERFACE (pH 212 & pH 213 only) .................................... 17
pH BUFFER TEMPERATURE DEPENDENCE...................................... 19
ELECTRODE CONDITIONING & MAINTENANCE ............................... 20
TROUBLESHOOTING GUIDE ........................................................ 23
TEMPERATURE CORRELATION FOR pH SENSITIVE GLASS ................. 24
ACCESSORIES ............................................................................. 25
2
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, notify your Dealer or the nearest Hanna
Customer Service Center.
Each instrument is supplied with:
• HI 1131B Glass-body Combination pH Electrode
• HI 7669/2W Temperature Probe
• HI 76404 Electrode Holder
• pH 4.01 & 7.01 Buffer Solutions, 20 mL each
• HI 7071S Electrolyte Solution
• 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 pH 210, pH 211, pH 212 and pH 213 are microprocessorbased pH and Temperature bench meters.
pH 211 and pH 213 can also measure ion concentration (ISE) and
Oxidation Reduction Potential (ORP) in the mV range.
pH measurements are compensated for temperature effect manually or
automatically with the HI 7669/2W temperature probe.
The instrument is equipped with a large easy-to-read LCD which shows
the pH (or mV) and temperature simultaneously, together with graphic
symbols.
The calibration process is guided step by step through clear indications on
the LCD. A stability indicator makes the calibration procedure error-free.
Through the RS232 serial port data can be transferred to a PC
(pH 212 and pH 213 only).
Hanna Instruments reserves the right to modify the design,
construction and appearance of its products without advance notice.
3
FUNCTIONAL DESCRIPTION
p H 210 AND p H 211
Front Panel
p H 210 AND p H 211
SPECIFICATIONS
Primary LCD
Secondary LCD
–2.00 to 16.00 pH
±399.9 mV (pH 211 only)
±2000 mV (pH 211 only)
RANGE
pH
C
1
–9.9 to 120.0 °C
9
0.01 pH
2
Functions
3
MEM
CAL
CFM
C
C
MEM
MR
4
MR
pH Calibration
Memorize Reading
Memory Recall
CAL
Start Calibration
/
Select 1 Buffer
CFM
RANGE Select pH / ORP
5
/
CFM
6
st
8
st
Confirm 1 Buffer
nd
Select 2
0.1 mV (pH 211 only)
1 mV (pH 211 only)
RANGE
Buffer
RE SOLUTION
nd
Confirm 2
Buffer
pH 211
Microprocessor pH Meter
7
0.1 °C
±0.01 pH
Rear Panel
POWER
12VDC
INPUT
10
11 12 13
REF
TEMP
1) Liquid Crystal Display (LCD).
2) CFM key, to confirm different values.
3) CAL key, to enter or exit/escape calibration mode.
4)
°C key, to manually decrease temperature or select pH buffer.
5)
°C key, to manually increase temperature or select pH buffer.
6) MR key, to recall the stored value.
7) MEM key, to store a value into memory.
8) RANGE key, to select measurement range (pH 211 only).
9) ON/OFF switch.
10) Power adapter socket.
11) BNC electrode connector.
12) Electrode reference socket.
13) Temperature probe socket.
4
±0.2 mV (±399.9 mV)
±1 mV (±2000 mV)
ACCURACY
@ 20°C / 68°F
±0.5 °C (0.0 – 100.0 °C)
±1 °C (outside)
(excluding probe error)
pH Calibration
1 or 2 point calibration, 5 buffers
a va ila b le
(4.01, 6.86, 7.01, 9.18, 10.01)
Temperature compensation
Manual or Automatic from:
–9.9 to 120.0 °C (14.2 to 248.0 °F)
pH E lectrode
HI 1131B (included)
Temperature probe
HI 7669/2W (included)
Input impedance
1012 ohms
Power supply
12 VD C adapter (included)
D imensions
240x182x74 mm (9.4x7.1x2.9”)
Weight
1.1 Kg (2.5 lb);
kit with holder 2.5 Kg (5.5 lb)
E nvironment
0 to 50 °C (32 to 122 °F)
max. 95% RH non-condensing
Warranty
2 years
5
pH 212 AND pH 213
SPECIFICATIONS
FUNCTIONAL DESCRIPTION
pH 212 AND pH 213
Front Panel
–2.00 to 16.00 pH
–2.000 to 16.000 pH
Primary LCD
Secondary LCD
RANGE
1
±999.9 mV (pH 213 only)
±2000 mV (pH 213 only)
–9.9 to 120.0 °C
10
0.01 pH
0.001 pH
2
Functions
3
MEM
CAL
CFM
C
C
4
MR
pH Calibration
Memorize Reading
Memory Recall
Start Calibration
/
Select 1 Buffer
CFM
RANGE Select pH / ORP
5
CAL
COMM RS232 Communication
/
CFM
6
st
9
RANGE
st
Confirm 1 Buffer
8
nd
Select 2
Buffer
nd
Confirm 2
Buffer
COMM
RE SOLUTION
0.1 mV (pH 213 only)
1 mV (pH 213 only)
pH 213
Microprocessor pH Meter
7
MEM
MR
0.1 °C
±0.01 pH
±0.002 pH
Rear Panel
POWER
12VDC
11
1)
2)
3)
4)
5)
6)
7)
8)
9)
10)
11)
12)
13)
14)
15)
REF
INPUT
TEMP
RS232
12 13 14
15
Liquid Crystal Display (LCD).
CFM key, to confirm different values.
CAL key, to enter or exit/escape calibration mode.
°C key, to manually decrease temperature or select pH buffer.
°C key, to manually increase temperature or select pH buffer.
MR key, to recall the stored value.
MEM key, to store a value into memory.
COMM key, to set the baud rate and the command prefix.
RANGE key, to select measurement range.
ON/OFF switch.
Power adapter socket.
BNC electrode connector.
Electrode reference socket.
Temperature probe socket.
RS232 serial communication connector.
6
ACCURACY
@ 20°C / 68°F
±0.5 mV (±999.9 mV)
±1 mV (±2000 mV)
±0.5 °C (0.0 – 100.0 °C)
±1 °C (outside)
(excluding probe error)
pH Calibration
1 or 2 point calibration, 5 buffers
a va ila b le
(4.01, 6.86, 7.01, 9.18, 10.01)
Temperature
compensation
Manual or Automatic from:
–9.9 to 120 °C (14.2 to 248 °F)
pH E lectrode
HI 1131B (included)
Temperature probe
HI 7669/2W (included)
Input impedance
1012 ohms
Computer interface
RS232 opto-isolated
Power supply
12 VD C adapter (included)
D imensions
240x182x74 mm (9.4x7.1x2.9”)
Weight
1.1 Kg (2.5 lb);
kit with holder 2.5 Kg (5.5 lb)
E nvironment
0 to 50 °C (32 to 122 °F)
max. 95% RH non-condensing
Warranty
2 years
7
OPERATIONAL GUIDE
POWER CONNECTION
• The pH is displayed on the primary LCD and the temperature on
the secondary LCD.
pH
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 pH or ORP measurements connect an electrode with internal
reference to the BNC connector on the back of the instrument.
For electrodes with a separate reference connect the electrode’s BNC to the
BNC connector and the reference electrode plug to the reference socket.
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/OFF
switch.
• All LCD tags are displayed and a beep is heard
while the instruments perform a self test (pH 212
and pH 213 only).
pH 210 & pH 211
C
• If the pH reading is out of range, “----” will be displayed on the
LCD.
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 in order to
prevent cross-contamination.
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 HI 7669/2W 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,simple manual temperature
compensation can be performed by disconnecting the temperature probe.
The display will then show the default temperature
of 25 °C or the last recorded temperature reading
with the “°C” tag blinking. The temperature can now
be adjusted with the ARROW keys (from -9.9 °C to
120.0 °C).
C
C
pH 212 & pH 213
C
ORP MEASUREMENTS ((p
pH 211 and p
H 213 only
pH
only))
pH
MEASUREMENTS
Make sure the instrument has been calibrated before
taking pH measurements.
• Submerge the electrode tip and the temperature
probe approximately 4 cm (1½”) into the sample
to be tested and stir gently. Allow time for the
electrode to stabilize.
8
An optional ORP electrode must be used to perform ORP measurements
(see Accessories).
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 RANGE 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.
9
• The instrument displays the mV reading on the primary LCD and
the temperature on the secondary LCD.
C
mV
• If the reading is out of range, “----” will be displayed on the
LCD.
TEMPERATURE MEASUREMENTS
Connect the HI 7669/2W temperature probe to the
appropriate socket and turn the instrument on.
Immerse the temperature probe into the sample and
allow the reading on the secondary LCD to stabilize.
MEMORY FUNCTION
Press and hold down MEM. The last reading will appear on the LCD
along with “MEM” tag until MEM is released.
MR
MEM
Press MR and the previously memorized reading will be displayed
with “MEM” tag on the LCD.
BEEP SETTING (pH 212 and pH 213 only
only))
Press and hold down °C and MEM keys and then power on the
instrument. After about 5 seconds the meter will display BEEP setting
menu. Use the ARROW keys to change the current setting. Press
CFM to confirm or CAL to escape without saving.
p H 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.
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 pH 7.01 as first buffer
and pH 4.01 as second buffer. If you are measuring in the alkaline
range, use pH 7.01 as first buffer and pH 10.01 or pH 9.18 as
second buffer.
PROCEDURE
Calibration has a choice of five memorized buffers: pH 4.01, 6.86,
7.01, 9.18 and 10.01.
It is recommended to perform a two-point calibration. However, onepoint calibration is also provided by the instruments.
TWO-POINT CALIBRATION
• Submerge the pH electrode and the temperature probe approximately 4 cm (1½") into a
buffer solution and stir gently. The temperature
probe should be close to the pH electrode.
• Press CAL. The “CAL” and “ ” tags will appear and “7.01”
buffer will be displayed on the secondary LCD.
pH
CAL
BUFFER pH
1
BUF
CAL
• If necessary, press the ARROW keys to select a different buffer value.
C
C
• The “ ” tag will blink on the LCD until the reading is stable.
10
11
• When the reading is stable and close to the selected buffer,
“READY” tag will appear and “CFM” tag will blink.
• Press CFM to confirm calibration.
• The calibrated value is then displayed on the
primary LCD and the secondary LCD will display CFM
the second expected buffer value.
pH
CAL
BUFFER pH
BUF 2
Note: The instruments will automatically skip the buffer used for the
first point. It also skips 6.86 if 7.01 buffer was used and
viceversa. Likewise, it will skip 9.18 if 10.01 buffer was used and
viceversa.
• 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.
C
• Press RANGE to display the temperature reading on the LCD during
calibration (pH 211, pH 212, pH
213 only).
ONE-POINT CALIBRATION
• Proceed as described in “Two-point calibration” section.
• Press CAL after the first calibration point
was confirmed.
CAL
The instrument will return to measurement mode
and will memorize the one-point calibration data.
Note: Press and hold down CFM and then press CAL. The instrument
sets default calibration parameters, displays “CLR” message for a
few seconds and then returns to normal measurement mode.
C
• The “ ” tag will blink on the LCD until the reading is stable.
• When the reading is stable, “READY” tag will appear and “CFM”
tag will blink.
• Press CFM to confirm calibration. The instrument
will return to measurement mode.
CFM
Notes: • If the value measured by the meter is not close to the
selected buffer, “WRONG ” and “WRONG ” tags will
blink alternately. In this case check if the correct buffer
has been used, or regenerate the electrode by following
the cleaning procedure (see page 22). If necessary,
change the buffer or the electrode.
• The “WRONG” tag and temperature value are displayed
blinking if the temperature reading is out of the defined
temperature range of the buffer. Calibration cannot be
confirmed in this situation.
12
13
TEMPERATURE CALIBRATION
(for technical personnel only)
All the instruments are factory calibrated for temperature.
Hanna’s temperature probes are interchangeable and no temperature calibration is needed when they are replaced.
If the temperature measurements are inaccurate, temperature
recalibration should be performed.
For an accurate recalibration, contact your dealer or the nearest
Hanna Customer Service Center, or follow the instructions bellow.
• Prepare a vessel containing ice and water and another one
containing hot water (at a temperature of around 50 ºC). Place
insulation material around the vessels to minimize temperature
changes.
• Use a calibrated thermometer with a resolution of 0.1 ºC as a
reference thermometer.
• With the instrument off, press and hold down the CAL&MEM
keys, then power on the instrument. The “CAL” tag will appear
and the secondary LCD will show 0.0 ºC.
• Immerse the temperature probe in the second vessel as near 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.
C
C
• When the reading is stable and close to the selected calibration
point, “READY” tag will appear and “CFM” tag will blink.
• Press CFM to confirm. The instrument returns
to measurement mode.
Note: If the reading is not close to the selected CFM
calibration point, “WRONG” tag will blink.
Change the temperature probe and restart
calibration.
CAL
C
• Immerse the temperature probe in the vessel with ice and water
as near 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.
C
C
• When the reading is stable and close to the selected calibration
point, “READY” tag will appear and “CFM” tag will blink.
• Press CFM to confirm. The secondary LCD will show 50.0 ºC.
CAL
C
CFM
14
15
m V CALIBRATION ((pp H 213 only
only))
(for technical personnel only)
PC INTERFACE
(p
H 212 & p H 213 only
(pH
only))
Data transmission from the instrument to the PC can be done with
the HI 92000 Windows® compatible software (optional). HI 92000
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 HI 920010
cable connector. Make sure that your instrument is switched off and
plug one connector to the instrument RS232C socket and the other into
the serial port of your PC.
Notes: • Other cables than HI 920010 may use a different
configuration. In this case communication between instrument and PC may not be possible.
• If you are not using Hanna Instruments HI 92000
software, please see the following instructions.
All the instruments are factory calibrated for mV.
Hanna’s ORP electrodes are interchangeable and no mV calibration
is needed when they are replaced.
If the mV measurements are inaccurate, mV recalibration should be
performed.
For an accurate recalibration, contact your dealer or the nearest
Hanna Customer Service Center, 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 a mV simulator with an accuracy of
±0.1 mV.
• With the instrument off, press and hold down the MR&CFM
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, “READY” tag will appear and “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, “READY” tag will appear and “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, “READY” tag will appear and “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
instrument 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.
SETTING THE BAUD RATE AND THE COMMAND
PREFIX
• To set the instrument baud rate, press COMM
while in measurement mode. The primary LCD
COMM
will show the current baud rate.
• Use the ARROW keys to change the displayed value (150; 300;
600; 1200; 2400 – factory setting; 4800; 9600).
16
17
C
C
• Press CFM to confirm. The primary LCD will show the current
command prefix (factory setting is 16).
• Use the ARROW keys to change the displayed value (between 0
and 47).
• Press CFM to confirm. The meter returns to
measurement mode.
CFM
Note: The command prefix must not be changed if
HI 92000 PC software is used.
SENDING COMMANDS FROM PC
It is also possible to remotely control the instrument with any
terminal program. Use HI 920010 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, follow the next scheme:
<DLE> <command> <CR>
This line makes the computer send a Data Link Escape character, the
command expressed as a 3-character sequence and a CR character.
Note: All the terminal programs that support the ANSI escape
sequence, represent the DLE character by the string '^P' and
the CR character by the string '^M'.
SIMPLE COMMANDS
PHR sets the range to pH
MVR sets the range to mV (pH 213 only)
CAL
is equivalent to pressing CAL
CFM
is equivalent to pressing CFM
UPC
is equivalent to pressing the °C key
DWC is equivalent to pressing the °C key
MEM is equivalent to pressing MEM
MRR is equivalent to pressing MR
COM is equivalent to pressing COMM
COMMANDS REQUIRING AN ANSWER
Causes the instrument to send the pH reading ("Err 1" is sent
if out of range). If the range is set to mV, "Err 6" is sent.
MV?
Causes the instrument to send the mV reading ("Err 2" is sent
if out of range). If the range is set to pH, "Err 6" is sent.
TM?
Causes the instrument to send the temperature reading
("Err 3" is sent if out of range).
Notes: • Either small or capital letters can be used.
• The characters sent by the meter are always capital letters.
• A “CAN” character (ASCII Code 24) is sent when the
instrument receives an unknown or a corrupted command.
Note: Invalid commands will be ignored.
pH?
p H BUFFER TEMPERATURE
DEPENDENCE
The 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
4. 01
6. 86
7. 01
9. 18
10. 01
0
32
4.01
6.98
7.13
9.46
10.32
5
41
4.00
6.95
7.10
9.39
10.24
10
50
4.00
6.92
7.07
9.33
10.18
15
59
4.00
6.90
7.05
9.27
10.12
20
68
4.00
6.88
7.03
9.22
10.06
25
77
4.01
6.86
7.01
9.18
10.01
30
86
4.02
6.85
7.00
9.14
9.96
35
95
4.03
6.84
6.99
9.11
9.92
40
104
4.04
6.84
6.98
9.07
9.88
45
113
4.05
6.83
6.98
9.04
9.85
50
122
4.06
6.83
6.98
9.01
9.82
55
131
4.08
6.84
6.98
8.99
9.79
60
140
4.09
6.84
6.98
8.97
9.77
65
149
4.11
6.84
6.99
8.95
9.76
70
158
4.12
6.85
6.99
8.93
9.75
75
167
4.14
6.86
7.00
8.91
9.74
80
176
4.16
6.87
7.01
8.89
9.74
85
185
4.17
6.87
7.02
8.87
9.74
90
194
4.19
6.88
7.03
8.85
9.75
95
203
4.20
6.89
7.04
8.83
9.76
During calibration the instrument will display the pH buffer value at
25 ºC.
18
19
ELECTRODE CONDITIONING &
MAINTENANCE
For refillable electrodes:
If the filling solution (electrolyte) is more than 2½ cm (1") below the
fill hole, add HI 7082 or HI 8082 3.5M KCl Electrolyte Solution for
double junction or HI 7071 or HI 8071 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.
MEASUREMENT
Rinse the 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.
STORAGE PROCEDURE
To minimize clogging and assure a quick response time, the glass bulb
and the junction should be kept moist and not allowed to dry out.
Replace the solution in the protective cap with a few drops of HI 70300
or HI 80300 Storage Solution or, in its absence, Filling Solution
(HI 7071 or HI 8071 for single junction and HI 7082 or HI 8082 for
double junction electrodes). Follow the Preparation Procedure on page
20 before taking measurements.
Note: NEVER STORE THE ELECTRODE IN DISTILLED OR DEIONIZED
WATER.
PERIODIC 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
affecting 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 HI 70300 or
HI 80300 Storage Solution for at least one hour.
20
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.
For refillable electrodes:
Refill the reference chamber with fresh electrolyte (HI 7071 or HI 8071
for single junction or HI 7082 or HI 8082 for double junction
electrodes). Allow the electrode to stand upright for 1 hour.
Follow the Storage Procedure above.
21
CLEANING PROCEDURE
TROUBLESHOOTING GUIDE
• General
Soak in Hanna HI 7061 or HI 8061 General
Cleaning Solution for approximately ½ hour.
• Protein
Soak in Hanna HI 7073 or HI 8073 Protein
Cleaning Solution for 15 minutes.
Soak in Hanna HI 7074 Inorganic Cleaning
• Inorganic
Solution for 15 minutes.
• Oil/grease Rinse with Hanna HI 7077 or HI 8077 Oil and
Fat Cleaning Solution.
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 electrode in HI 70300 or HI 80300 Storage Solution for
at least 1 hour before taking measurements.
SYMPTOMS
Slow reponse/excessive
drift.
PROBLE M
D irty pH electrode.
Soak the electrode tip in
HI 7061 or HI 8061
solution for 30 minutes
and then clean the
electrode.
Readings fluctuate up Clogged/dirty junction.
and down (noise).
Low electrolyte level
(refillable electrodes
only).
Clean the electrode.
Refill with fresh solution
(for refillable electrodes
only).
Out of range in the
mV scale.
D ry
membrane/junction.
Soak in HI 70300 or
HI 80300 storage
solution.
The meter does not
accept the buffer
solution for
calibration.
Out of order pH
electrode.
Follow the cleaning
procedure. If still no
results, replace the
electrode.
The display shows
"pH" and "----".
Out of range in the pH a) Recalibrate the meter.
scale.
b) Make sure the pH
sample is in the specified
range.
c) Check the electrolyte
level and the general
state of the electrode.
The display shows
"mV" and "----".
Out of range in the
mV scale.
E lectrode not connected.
The meter does not
work with the
temperature probe.
Broken temperature
probe.
Replace the temperature
probe.
The meter fails to
calibrate or gives
faulty readings.
Broken pH electrode.
Replace the electrode.
At startup the meter
displays all LCD tags
permanently.
One of the keys is
blocked.
Check the keyboard or
contact the vendor.
"E rr xx" error message Internal error.
displayed.
22
SOLUTION
23
Power off the meter and
then power it on. If the
error persists, contact the
vendor.
TEMPERATURE CORRELATION
FOR p H 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 °C.
Since the resistance of the pH electrode is in the range of 50-200 Mohms,
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
1- 3 years
90 °C
Less than 4 months
120 °C
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 interfe-rence is called
alkaline error and causes the pH to be underestimated. Hanna’s glass
formulations have the indicated characteristics.
Sodium Ion Correction for Glass at 20-25 °C
Concentration
pH
13.00
0.1 Mol L-1 Na+
13.50
14.00
12.50
13.00
1.0 Mol L-1 Na+
13.50
14.00
24
Error
0.10
0.14
0.20
0.10
0.18
0.29
0.40
ACCESSORIES
pH BUFFER SOLUTIONS
HI 70004P
HI 70007P
HI 70010P
HI 7004L
HI 7006L
HI 7007L
HI 7009L
HI 7010L
HI 8004L
HI 8006L
HI 8007L
HI 8009L
HI 8010L
pH 4.01 Buffer Sachets, 20 mL, 25 pcs
pH 7.01 Buffer Sachets, 20 mL, 25 pcs
pH 10.01 Buffer Sachets, 20 mL, 25 pcs
pH 4.01 Buffer Solution, 500 mL bottle
pH 6.86 Buffer Solution, 500 mL bottle
pH 7.01 Buffer Solution, 500 mL bottle
pH 9.18 Buffer Solution, 500 mL bottle
pH 10.01 Buffer Solution, 500 mL bottle
pH 4.01 Buffer Sol. in FDA approved bottle, 500 mL
pH 6.86 Buffer Sol. in FDA approved bottle, 500 mL
pH 7.01 Buffer Sol. in FDA approved bottle, 500 mL
pH 9.18 Buffer Sol. in FDA approved bottle, 500 mL
pH 10.01 Buffer Sol. in FDA approved bottle, 500 mL
ELECTRODE STORAGE SOLUTIONS
HI 70300L Storage Solution, 460 mL bottle
HI 80300L Storage Solution in FDA approved bottle, 460 mL
ELECTRODE CLEANING SOLUTIONS
HI 70000P
HI 7061L
HI 7073L
HI 7074L
HI 7077L
HI 8061L
HI 8073L
HI 8077L
Electrode Rinse Sachets, 20 mL, 25 pcs
General Cleaning Solution, 460 mL bottle
Protein Cleaning Solution, 460 mL bottle
Inorganic Cleaning Solution, 460 mL bottle
Oil & Fat Cleaning Solution, 460 mL bottle
General Cleaning Sol. in FDA approved bottle, 460 mL
Protein Cleaning Solution in FDA approved bottle, 460 mL
Oil & Fat Cleaning Sol. in FDA approved bottle, 460 mL
ELECTRODE REFILL ELECTROLYTE SOLUTIONS
HI 7071
HI 7072
HI 7082
HI 8071
HI 8072
HI 8082
3.5M KCl+AgCl Electrolyte, 4x50 mL, for single junction
electrodes
1M KNO3 Electrolyte, 4x50 mL
3.5M KCl Electrolyte, 4x50 mL, for double junction
electrodes
3.5M KCl+AgCl Electrolyte in FDA approved bottle,
4x50 mL, for single junction electrodes
1M KNO3 Electrolyte in FDA approved bottle, 4x50 mL
3.5M KCl Electrolyte in FDA approved bottle, 4x50 mL
25
ORP PRETREATMENT SOLUTIONS
HI 7091L
Reducing Pretreatment Solution, 460 mL bottle
HI 7092L
Oxidizing Pretreatment Solution, 460 mL bottle
pH ELECTRODES
All electrodes part numbers ending with B are supplied with BNC
connector and 1 m (3.3') cable, as shown below :
HI 1330B
Glass-body, semimicro, single junction, refillable, combination pH
electrode. Use: laboratory, vials.
5mm DIA
0.2"
5mm
0.2"
HI 1330
120 mm
4.7"
"S" VERSION
HI 1043B
Glass-body, double junction, refillable, combination pH electrode.
Use: strong acid/alkali.
9.5mm DIA
0.37"
12 mm
0.5"
8 mm
0.3"
7.5mm DIA
0.29"
HI 1331
210 mm
8.25"
"S" VERSION
HI 1043
120 mm
4.7"
"S" VERSION
HI 1053B
Glass-body, triple ceramic, conic shape, refillable, combination pH
electrode. Use: emulsions.
12 mm
0.5"
HI 1053
HI 1230B
Plastic-body (Ultem®), double junction, gel-filled, combination pH
electrode. Use: general, field.
12 mm
0.5"
HI 1230
"S" VERSION
120 mm
4.7"
"S" VERSION
HI 1083B
Glass-body, micro, Viscolene, non-refillable, combination pH electrode.
Use: biotechnology, micro titration.
12 mm
0.5"
HI 1331B
Glass-body, semimicro, single junction, refillable, combination pH
electrode. Use: flasks.
5 mm
0.2"
3 mm
0.12"
3.0 mm DIA
0.12"
120 mm
4.7"
HI 2031B
Glass-body, semimicro, conic, refillable, combination pH electrode. Use:
semisolid products.
6 mm
0.25"
HI 2031
HI 1083
120 mm
4.7"
75 mm
2.95"
"S" VERSION
HI 1131B
Glass-body, single junction, refillable, combination pH electrode.
Use: general purpose.
9.5mm DIA
0.37"
HI 1332B
Plastic-body (Ultem®), double junction, refillable, combination pH
electrode. Use: general purpose.
12 mm
0.5"
12 mm
0.5"
HI 1131
HI 1332
120 mm
4.7"
"S" VERSION
26
"S" VERSION
120 mm
4.7"
27
FC 100B
Plastic-body (Kynar®), double junction, refillable, combination pH
electrode. Use: general purpose for food industry.
HI 1413B
Glass-body, single junction, flat tip, Viscolene, non-refillable, combination
pH electrode. Use: surface measurement.
12 mm
0.5"
12 mm
0.5"
FC 100
HI 1413
120 mm
4.7"
110 mm
4.3"
FC 200B
Plastic-body (Kynar®), open junction, conic, Viscolene, non-refillable,
combination pH electrode. Use: meat & cheese.
6 mm
0.25"
ORP ELECTRODES
HI 3131B
Glass-body, refillable, combination platinum ORP electrode.
Use: titration.
FC 200
12 mm
0.5"
75 mm
2.95"
HI 3131
FC 210B
Glass-body, double junction, conic, Viscolene, non-refillable, combination pH electrode. Use: milk, yogurt.
150 mm
5.9"
"S" VERSION
HI 3230B
Plastic-body (Ultem®), gel-filled, combination platinum ORP electrode. Use: general purpose.
12 mm
0.5"
12 mm
0.5"
FC 210
HI 3230
120 mm
4.7"
FC 220B
Glass-body, triple-ceramic, single junction, refillable, combination pH
electrode. Use: food processing.
9.5mm DIA
0.37"
12 mm
0.5"
120 mm
4.7"
"S" VERSION
HI 4430B
Plastic-body (Ultem®), gel-filled, combination gold ORP electrode.
Use: general purpose.
12 mm
0.5"
FC 220
HI 4430
120 mm
4.7"
FC 911B
Plastic-body (Kynar®), double junction, refillable with built-in amplifier, combination pH electrode. Use: very high humidity.
120 mm
4.7"
"S" VERSION
Consult the Hanna General Catalog for more electrodes with screwtype or BNC connectors.
12 mm
0.5"
FC 911
110 mm
4.3"
28
Ultem® is registered Trademark of "General Electric Co."
Kynar® is registered Trademark of "Pennwalt Corp."
29
EXTENSION CABLE FOR SCREW-TYPE ELECTRODES
(SCREW TO BNC ADAPTER)
HI 7855/1 Extension cable 1 m (3.3') long
HI 7855/3 Extension cable 3 m (9.9') long
HI 7855 SERIES CABLE CONNECTORS
CONNECTOR AND 3.0 mm (0.12") CABLE WITH BNC
CONNECT TO THE
BNC SOCKET
OF THE METER
CONNECT TO
SCREW TYPE
ELECTRODES
OTHER ACCESSORIES
HI 710005
HI 710006
HI 710012
HI 710013
HI 710014
HI 76405
Voltage adapter from 115 VAC to 12 VDC (USA plug)
Voltage adapter from 230 VAC to 12 VDC (European plug)
Voltage adapter from 240 VAC to 12 VDC (UK plug)
Voltage adapter from 230 VAC to 12 VDC (South Africa plug)
Voltage adapter from 230 VAC to 12 VDC (Australia plug)
Electrode holder
RECOMMENDATIONS FOR USERS
Before using these products, make sure they are entirely suitable for
the environment in which they are used.
Operation of these instruments in residential areas could cause
unacceptable interferences to radio and TV equipment, requiring the
operator to follow all necessary steps to correct interferences.
The glass bulb at the end of the pH electrode is sensitive to
electrostatic discharges. Avoid touching this glass bulb at all times.
During operation, ESD wrist straps should be worn to avoid possible
damage to the electrode by electrostatic discharges.
Any variation introduced by the user to the supplied equipment may
degrade the instrument’s EMC performance.
To avoid electrical shock, do not use these instruments when voltages
at the measurement surface exceed 24 VAC or 60 VDC.
To avoid damage or burns, do not perform any measurement in
microwave ovens.
pH and ORP electrode simulator with 1 m (3.3') coaxial
cable ending in female BNC connectors
HI 931001 pH and ORP electrode simulator with LCD and 1 m (3.3')
coaxial cable ending in female BNC connectors
HI 7669/2WTemperature probe with 1 m (3.3') cable
HI 92000 Windows® compatible software application
HI 920010 9 to 9-pin RS232 cable
HI 8427
Windows® is registered Trademark of "Microsoft Co."
30
31
MAN213
12/06
Was this manual useful for you? yes no
Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Download PDF

advertising