Hanna Instruments HI 8512, HI 8710, HI 8711, HI 8720 Instruction Manual

1

0£

Instruction Manual

HI 8510 • HI 8512

HI 8710 • HI 8711

HI 8720

Panel Mounted

pH and ORP

Indicators and Controllers

SLOPE

DOSAGE

OXID.

REDUC.

ΔAL

COARSE

SET

FINE

ΔAL

MEA

SURE

SET

0 mV

TEST

500 mV

TEST

HI 8720E

ORP

mV

www.hannainst.com

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2£

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 noticeable damage,
immediately notify your dealer.

Each model is supplied complete with
transparent splash-proof front cover, mounting
brackets and instruction manual

Note: Save all packing materials until you

are sure that the instrument functions
correctly. All defective items must be
returned in the original packing materials
together with the supplied accessories.

GENERAL DESCRIPTION

HI 8510 and HI8512 pH and ORP panel-

mounted indicators, and HI 8710, HI 8711
and HI 8720 pH and ORP controllers, are
ideal for process control monitoring in a wide
range of industrial applications.

These instruments have been designed for
easy and fast installation, and are provided
with membrane keypads on the front panel,
large display and autodiagnostic functions.

All connections are made through screw ter­minals on the rear panel.

Two versions are available for each model, to
accept either a direct input from a pH or ORP
electrode (E version) or from a transmitter
through 4-20mA input (T version).

Moreover, you can choose the output
configuration for connecting a recorder or a
PLC, between 0-20 or 4-20 mA.

Dear Customer,
Thank you for choosing a HANNA instruments

®

product.
Please read this instruction manual carefully
before using the instrument.

If you need additional technical information,
do not hesitate to e-mail us at
[e-mail].
These instruments are in compliance with the

directives.

Preliminary Examination ............................. 3

General Description..................................... 3

Available Models ......................................... 4

Mechanical Dimensions .............................. 6

Functional Description HI 8510.................... 7

Functional Description HI 8512.................. 10

Functional Description HI 8710.................. 13

Functional Description HI 8711.................. 16

Functional Description HI 8720.................. 20

Specifications............................................ 24

Initial Preparation ...................................... 27

Operational Guide ..................................... 30

pH Calibration ........................................... 34

pH Values at Various T emperature............. 36

pH Diagnostic Tests.................................. 37

ORP Diagnostic Tests............................... 39

LED Indication........................................... 40

T aking Redox Measurements .................... 41

Electrode Maintenance.............................. 43

Suggested Installations ............................. 47

Accessories.............................................. 49

Warranty ................................................... 55

TABLE OF CONTENTS

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AVAILABLE MODELS

HI 8510E020 pH indicator with electrode

input and 0-20 mA recorder
output

HI 8510E420 pH indicator with electrode

input and 4-20 mA recorder
output

HI 8510T020 pH indicator with input from

transmitter and 0-20 mA
recorder output

HI 8510T420 pH indicator with input from

transmitter and 4-20 mA
recorder output

HI 8512E020 ORP indicator with electrode

input and 0-20 mA recorder
output

HI 8512E420 ORP indicator with electrode

input and 4-20 mA recorder
output

HI 8512T020 ORP indicator with input from

transmitter and 0-20 mA
recorder output

HI 8512T420 ORP indicator with input from

transmitter and 4-20 mA
recorder output

HI 8710E020 pH controller with electrode

input and 0-20 mA recorder
output

HI 8710E420 pH controller with electrode

input and 4-20 mA recorder
output

HI 8710T020 pH controller with input from

transmitter and 0-20 mA
recorder output

HI 8710T420 pH controller with input from

transmitter and 4-20 mA
recorder output

HI 8711E020 pH controller with 2 setpoints,

electrode input and 0-20 mA
recorder output

HI 8711E420 pH controller with 2 setpoints,

electrode input and 4-20 mA
recorder output

HI 8711T020 pH controller with 2 setpoints,

input from transmitter and 0­20 mA recorder output

HI 8711T420 pH controller with 2 setpoints,

input from transmitter and 4­20 mA recorder output

HI 8720E020 ORP controller with electrode

input and 0-20 mA recorder
output

HI 8720E420 ORP controller with electrode

input and 4-20 mA recorder
output

HI 8720T020 ORP controller with input from

transmitter and 0-20 mA
recorder output

HI 8720T420 ORP controller with input from

transmitter and 4-20 mA
recorder output

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FUNCTIONAL DESCRIPTION HI 8510

FRONT PANEL

SLOPE

Δ

SENSOR

TEST

pH 7

TEST

pH 4

TEST

pH

HI 8510E

pH

Keypad

SENSOR TEST

To display the mV reading of the electrode and,
therefore, verify its working condition

pH 7 TEST

To verify the internal circuit of the meter in terms
of Offset compensation

pH 4 TEST

To verify the amplifier circuit of the meter

Trimmers

ΔΔ

ΔΔ

ΔO For Offset calibration

SLOPE For Slope calibration

MECHANICAL DIMENSIONS

The meters are provided with a black anodized
aluminum body, front and back panels in
shockproof ABS plastic and a transparent
splash-proof front cover.

Front view of the panel-mounted unit

The dimensions show the cutout size for the
installation.

Side view of the panel-mounted unit

Adjustable location brackets (supplied with
the meter) allow the indicator to slide into the
cutout and will hold the unit securely in place.
190 mm (7.50") is the minimum space re­quired to install the indicator with complete
wiring.

190mm MIN

7.50"

135mm

5.31"

0.25/4mm

0.01/0.160"

1

44mm

5.67"

ADJUSTABLE
LOCATION
BRACKET

141mm

5.55"

144m

m

5.67

"

69mm

2.71"

72mm

2.83"

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1. Fuse holder

2. Power supply terminals

3. Recorder output terminals

4. Connections to the transmitter

REAR PANEL HI 8510T

1. Fuse holder

2. Power supply terminals

3. Recorder output terminals

4. Connections for Pt100 temperature sensor

5. BNC socket for pH electrode

FUSE

FUSE

ELECTRODE
INPUT

PT100

mA OUT

+

-

220

110

L

1

2

3

4

5

REAR PANEL HI 8510E

Unplug the instrument from the power
supply before replacing the fuse.

Unplug the instrument from the power
supply before replacing the fuse.

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1. Fuse holder

2. Power supply terminals

3. Recorder output terminals

4. BNC socket for ORP electrode

REAR PANEL HI 8512E

FUSE

FUSE

ELECTRODE
INPUT

220

110

L

1

2

3

4

mA OUT

+

-

FUNCTIONAL DESCRIPTION HI 8512

Keypad

0 mV TEST To verify the instrument cali-

bration at 0 mV

500 mV TEST To verify the slope at 500 mV

Trimmers

SLOPE For slope calibration

FRONT PANEL

SLOPE

0 mV

TEST

500 mV

TEST

mV

HI 8512E

ORP

Unplug the instrument from the power
supply before replacing the fuse.

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FUNCTIONAL DESCRIPTION HI 8710

Keypad

SET To set the pH dosage limit
MEASURE To enter measurement mode

and to enable diagnostic tests

SENSOR TEST To display electrode mV reading

and verify its working condition

ΔΔ

ΔΔ

ΔAL To display & set alarm tolerance

pH 7 TEST To verify Offset compensation
pH 4 TEST To verify amplifier circuit

Trimmers

ΔΔ

ΔΔ

ΔO For Offset calibration

SLOPE For Slope calibration

ΔΔ

ΔΔ

ΔAL To set the alarm tolerance

SET/COARSE To coarsely adjust the setpoint
SET/FINE To finely adjust the setpoint

LEDs

ACID Show that acid dosage is active
BASE Show that basic dosage is active

ΔΔ

ΔΔ

ΔAL (blinking) Indicate an active alarm

FRONT PANEL

SLOPE

ACID

BASE

ΔAL

0

Δ

COARSE

SET

FINE

SENSOR

TEST

MEA

SURE

ΔAL

SET

pH 7

TEST

pH 4

TEST

pH

HI 8710E

pH

1. Fuse holder

2. Power supply terminals

3. Recorder output terminals

4. Connections to the transmitter

REAR PANEL HI 8512T

Unplug the instrument from the power
supply before replacing the fuse.

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1. Fuse holder

2. Power supply terminals

3. Acid/Basic dosage selection terminals

4. Red/ox dosage consent terminals

5. Connections for dosing pump

6. Alarm contacts

7. Recorder output contacts

8. Connections to the transmitter

REAR PANEL HI 8710T

1. Fuse holder

2. Power supply terminals

3. Acid/Basic dosage selection terminals

4. Red/ox dosage consent terminals

5. Connections for dosing pump

6. Alarm contacts

7. Recorder output contacts

8. Connections for Pt100 temperature sensor

9. BNC socket for pH electrode

REAR PANEL HI 8710E

FUSE

FUSE

ELECTRODE
INPUT

PT100

mA OUT

OPEN: ACID
SHORT: BASE

+

-

SET

CONSENT

ALARM

220

110

L

1

2

3

7

8

9

4

6

5

Unplug the instrument from the power
supply before replacing the fuse.

Unplug the instrument from the power
supply before replacing the fuse.

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ΔΔ

ΔΔ

ΔAl To display and set the

alarm tolerance

pH 7 TEST To verify Offset compen-

sation

pH 4 TEST To verify amplifier circuit

Trimmers

ΔΔ

ΔΔ

ΔO For Offset calibration

SLOPE For Slope calibration

ΔΔ

ΔΔ

ΔAL To set the tolerance of the

alarm

ACID SET/COARSE To coarsely adjust

acid setpoint

ACID SET/FINE To finely adjust acid

setpoint

BASE SET/COARSE To coarsely adjust

basic setpoint

BASE SET/FINE To finely adjust basic

setpoint

LEDs

ACID SET (Blinking) Show that acid dos-

age is active

BASE SET (Blinking) Show that basic

dosage is active

ΔΔ

ΔΔ

ΔAL (Blinking) Indicate active alarm

FUNCTIONAL DESCRIPTION HI 8711

Keypad

ACID SET To set the working point

of acid dosage

BASE SET To set the working point

of basic dosage

MEASURE To enter measurement

mode and to enable
diagnostic tests

SENSOR TEST To display electrode mV

reading and, therefore,
verify its working condition

FRONT PANEL

SLOPE

ΔAL

Δ

COARSE

ACID SET

FINE

COARSE

FINE

BASE SET

HI 8711E

SENSOR

TEST

MEA

SURE

ACID

SET

ΔAL

BASE

SET

pH 7

TEST

pH 4

TEST

pH

HI 8711E

pH

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1. Fuse holder

2. Power supply terminals

3. Connections for dosing pump for acid

4. Connections for dosing pump for base

5. Alarm contacts

6. Recorder output contacts

7. Connections to the transmitter

REAR PANEL HI 8711T

1. Fuse holder

2. Power supply terminals

3. Connections for dosing pump for acid

4. Connections for dosing pump for base

5. Alarm contacts

6. Recorder output contacts

7. Connections for Pt100 temperature sensor

8. BNC socket for pH electrode

REAR PANEL HI 8711E

FUSE

FUSE

ELECTRODE
INPUT

PT100

mA OUT

+

-

BASE

ACID

ALARM

220

110

L

1

2

6

7

8

3

5

4

Unplug the instrument from the power
supply before replacing the fuse.

Unplug the instrument from the power
supply before replacing the fuse.

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20

Trimmers

SLOPE For Slope calibration

ΔΔ

ΔΔ

ΔAL To display and set the alarm

tolerance

SET/COARSE To coarsely adjust the

setpoint

SET/FINE To finely adjust the setpoint

LEDs

OXID Show that the oxidant dosage is

active

REDUC Show that the reductant dosage

is active

ΔΔ

ΔΔ

ΔAL (blinking) Indicate an active alarm

FUNCTIONAL DESCRIPTION HI 8720

Keypad

SET To set the working point of ORP

dosage

MEASURE To enter measurement mode and

to enable diagnostic tests

ΔΔ

ΔΔ

ΔAl To display and set the alarm

tolerance

0 mV TEST To verify the instrument

calibration at 0 mV

500 mV TEST To verify the slope at

500mV

FRONT PANEL

SLOPEDOSAGE

OXID. REDUC.

ΔAL

COARSE

SET

FINE

ΔAL

MEA

SURE

SET

0 mV

TEST

500 mV

TEST

mV

HI 8720E

ORP

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1. Fuse holder

2. Power supply terminals

3. Ox/Red dosage selection terminals

4. Ox/red dosage consent terminals

5. Connections for dosing pump

6. Alarm contacts

7. Recorder output contacts

8. Connections to the transmitter

REAR PANEL HI 8720T

1. Fuse holder

2. Power supply terminals

3. Ox/Red dosage selection terminals

4. Ox/red dosage consent terminals

5. Connections for dosing pump

6. Alarm contacts

7. Recorder output contacts

8. BNC socket for ORP electrode

REAR PANEL HI 8720E

FUSE

FUSE

ELECTRODE
INPUT

CONSENT

mA OUT

OPEN: OXD
SHORT: RDX

+

-

SET

ALARM

220

110

L

1

2

3

7

4

8

6

5

Unplug the instrument from the power
supply before replacing the fuse.

Unplug the instrument from the power
supply before replacing the fuse.

25

24£

24

HI 8510E HI 8510T

Range 0.00 to 14.00 pH
Resolution 0.01 pH
Accuracy ±0.02 pH ±0.5%
Typical EMC Dev. ±0.1 pH / ±0.2 mA
Installation Category II
Input 1012 Ohm 4 to 20 mA
Calibration Offset: ±2 pH with Δ0 trimmer

Slope: 80 to 110% with slope trimmer

Temperature Fixed or automatic with Pt100
Compensation from 0 to 100°C (32 to 212°F)

Recorder Output 0-20 mA or 4-20 mA (isolated)
Power Supply 115 or 230 Vac; 50/60 Hz
Environment -10 to 50°C (14 to 122°F);

RH max 95% non condensing

Panel Cutout 141 x 69 mm (5.6 x 2.7'')
Weight 1 kg (2.2 lb.)

SPECIFICATIONS

HI 8710E HI 8710T

Range 0.00 to 14.00 pH
Resolution 0.01 pH
Accuracy ±0.02 pH ±0.5%
Typical EMC Dev. ±0.1 pH / ±0.2 mA
Installation Category II
Input 1012 Ohm 4 to 20 mA
Calibration Offset: ±2 pH with Δ0 trimmer

Slope: 80 to 110% with slope trimmer

Temperature Fixed or automatic with Pt100
Compensation from 0 to 100°C (32 to 212°F)

Relays 1 for setpoint and 1 for alarm,

max 2A, 240 V resistive load (isolated)

Recorder Output 0-20 mA or 4-20 mA (isolated)
Power Supply 115 or 230 Vac; 50/60 Hz
Environment -10 to 50°C (14 to 122°F);

RH max 95% non condensing

Panel Cutout 141 x 69 mm (5.6 x 2.7'')
Weight 1 kg (2.2 lb.)

HI 8512E HI 8512T

Range ±1000 mV
Resolution 1 mV
Accuracy ±5 mV ±0.5%
Typical EMC Dev. ±6 mV / ±0.2 mA
Installation Category II
Input 1012 Ohm 4 to 20 mA
Calibration Slope: 90 to 110% with slope trimmer
Recorder Output 0-20 mA or 4-20 mA (isolated)
Power Supply 115 or 230 Vac; 50/60 Hz
Environment -10 to 50°C (14 to 122°F);

RH max 95% non condensing

Panel Cutout 141 x 69 mm (5.6 x 2.7'')
Weight 1 kg (2.2 lb.)

HI 8711E HI 8711T

Range 0.00 to 14.00 pH
Resolution 0.01 pH
Accuracy ±0.02 pH ±0.5%
Typical EMC Dev. ±0.1 pH / ±0.2 mA
Installation Category II
Input 1012 Ohm 4 to 20 mA
Calibration Offset: ±2 pH with Δ0 trimmer

Slope: 80 to 110% with slope trimmer

Temperature Fixed or automatic with Pt100
Compensation from 0 to 100°C (32 to 212°F)

Relays 2 for setpoint and 1 for alarm,

max 2A, 240 V resistive load (isolated)

Recorder Output 0-20 mA or 4-20 mA (isolated)
Power Supply 115 or 230 Vac; 50/60 Hz
Environment -10 to 50°C (14 to 122°F);

RH max 95% non condensing

Panel Cutout 141 x 69 mm (5.6 x 2.7'')
Weight 1 kg (2.2 lb.)

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• Connect a 3-wire cable to
the power supply terminal
according to the voltage level
as indicated, and pay par­ticular attention to the correct
live, earth and neutral
connections.

• For E models, connect the
electrode to the BNC plug
on the rear panel.

• For T models, connect the
2 signal wires of the analog
transmitter to the "IN/OUT
TRANSMITTER" terminals,
while paying attention to the
indicated polarity.

• Recorder output terminals:
these contacts are used for
connection to a recorder.
The output can be 0-20 mA
or 4-20 mA depending on
model, and is proportional
to the pH or ORP reading.

• Pt100 terminals: these con­tacts are used to connect
the Pt100 temperature
sensor for automatic tem­perature compensation of pH
readings. If temperature com­pensation is not required,
connect a 110 Ohm/0.25W
resistor across the terminals
(equivalent to a fixed tem­perature of 25°C/77°F).

FUSE

FUSE

220

110

L

ELECTRODE
INPUT

INITIAL PREPARATION

PT100

mA OUT

+

-

HI 8720E HI 8720T

Range ±1000 mV
Resolution 1 mV
Accuracy ±5 mV ±0.5%
Typical EMC Dev. ±6 mV / ±0.2 mA
Installation Category II
Input 1012 Ohm 4 to 20 mA
Calibration Slope: 90 to 110% with slope trimmer
Relays 1 for setpoint and 1 for alarm,

max 2A, 240 V resistive load (isolated)

Recorder Output 0-20 mA or 4-20 mA (isolated)
Power Supply 115 or 230 Vac; 50/60 Hz
Environment -10 to 50°C (14 to 122°F);

RH max 95% non condensing

Panel Cutout 141 x 69 mm (5.6 x 2.7'')
Weight 1 kg (2.2 lb.)

29

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• Consent contacts (HI 8710 and HI 8720):
these contacts (max. 2A, 240V) are used
for reduction and oxidation reactions when
the pH controller works in conjunction with
an ORP controller and vice versa.
In these applications, the consent contacts
of both meters are connected together to
link the ORP and pH controllers, so that
ORP dosage will occur only if the actual
pH value is correct. This feature avoids
overdosages which may lead to undesirable
pollution.
For HI 8710, the "Consent" contacts can
be left open if the instrument is used
independently as pH controller only.
For HI 8720, the "Consent" contacts should
be shorted if the instrument is used inde­pendently as ORP controller only.

• Alarm contacts (HI 8710,
HI 8711 and HI 8720): if the

pH or ORP measurement is
not within the set value
tolerance, the alarm contact
is closed.

Note: All external cables connected to the rear

panel should be ended with cable lugs.

FUSE

ACID

FUSE

FUSE

BASE

FUSE

FUSE

ALARM

FUSE

• The HI 8710 models are single dosage
controllers with acid/alkaline selection.

If acid dosage is needed
(e.g. in chromium VI
reduction), leave open the
ACID/BASE selection
terminals (see picture), while
for alkaline dosage (e.g. in
cyanide oxidation), make a
short circuit across the
ACID/BASE selection
terminals with a jumper wire.

• The HI 8720 models are single dosage
controllers with oxidant/reductant selection.

If oxidant dosage is needed
(e.g. in cyanide oxidation),
leave open the OX/RED
selection terminals (see
picture), while for reductant
dosage (e.g. in chromium
VI reduction), make a short
circuit across the OX/RED
selection terminals with a
jumper wire.

• Set contacts (HI 8710 and HI 8720): these
contacts (max. 2A, 240 V)
are used to connect the
dosing pump, and act only
as a switch for the power
to the drive.

• Acid contacts (HI 8711):
these contacts are used to
connect the dosing pump
for acid, and act as a switch
for the power to the drive.

• Base contact (HI 8711):
these contacts are used to
connect the dosing pump
for base, and act as a
switch for the power to the
drive.

OPEN: ACID
SHORT: BASE

OPEN: ACID
SHORT: BASE

OPEN: OXD
SHORT: RDX

OPEN: OXD
SHORT: RDX

FUSE

SET

FUSE

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30

Using a small screwdriver adjust the ACID
SET COARSE and FINE trimmers to display
the desired acid set value.

To set the working point for alkaline dosage,
press the BASE SET key and the display will
show the set value for base dosage.

Using a small screwdriver adjust the BASE
SET COARSE and FINE trimmers to display
the desired base set value.

ALARMS (HI 8710, HI 8711 and HI 8720)

To set the alarm tolerance, press ΔAL key
and the display will show the current value.

Using a small screwdriver adjust the ΔAL
trimmer to display the desired tolerance.

OPERATIONAL GUIDE

All instrument settings are made via front
panel keys and trimmers.

When each key is pressed, the corresponding
LED lights up to show the operating function.

If using a model with input from electrode,
make sure that the meter is calibrated before
starting any operation (see "Calibration"
section for details).

SET POINTS (HI 8710 and HI 8720)

To set the working point for pH or ORP
dosage, press SET and the display will show
the set value.

Using a small screwdriver adjust the COARSE
and FINE trimmers to display the desired set
value.

SET POINTS (HI 8711)

To set the working point for acid dosage,
press the ACID SET key and the display will
show the set value for acid dosage.

pH

COARSE

SET

FINE

SET

pH

COARSE

SET

FINE

SET

pH

COARSE

ACID SET

FINE

ACID
SET

BASE

SET

pH

COARSE

ACID SET

FINE

ACID
SET

BASE
SET

ACID
SET

BASE

SET

COARSE

FINE

BASE SET

pH

ACID
SET

BASE
SET

COARSE

FINE

BASE SET

pH

ΔAL

ΔAL

pH

33

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32

When acid dosage is active,
the ACID LED lights up, while
during alkaline dosage, the
BASE LED turns on (HI 8710
only).

When oxidant dosage is active,
the OXID LED lights up, while
during reductant dosage, the
REDUC LED turns on (HI 8720
only).

SLOPEDOSAGE

ACID BASE

ΔAL

COARSE

SET

FINE

MEA

SURE

SET

SLOPEDOSAGE

OXID. REDUC.

ΔAL

COARSE

SET

FINE

MEA

SURE

SET

Examples:
For HI 8710, if the set value is pH 3 and the

ΔAlarm is 1.5 pH, the instrument generates
an alarm every time the pH reading is higher
than 4.5 pH or lower than 1.5pH.

For HI 8711, if the set values are pH 7 and
pH 8, and the Δ Alarm is 1.5 pH, the instru­ment generates an alarm every time the pH
reading is higher than 9.5 pH or lower than

5.5 pH.

For HI 8720, if the set value is 300 mV and the
ΔAlarm is 100 mV, the instrument generates an
alarm every time the ORP reading is higher than
400 mV or lower than 200 mV.

MEASUREMENTS

After setting the pH (or ORP)
and alarm (if available)
thresholds, immerse the elec­trode in the solution to be
tested and press MEASURE.

The actual pH or ORP value of the test solu­tion is displayed.

COARSE

SET

FINE

MEA
SURE

ΔAL

ΔAL

pH

pH

mV

35

34£

34

Rinse pH electrode and thermometer probe
thoroughly with water, then immerse them in
pH4.01 (HI 7004) or pH 10.01 (HI 7010) buffer
solution.

Note: For accurate readings, use pH 4.01 if

you are going to measure acid samples
or pH 10.01 for alkaline measurements.

Shake briefly and wait one minute before
adjusting the slope trimmer to display the ph
value of the buffer solution, i.e. pH 4.01 (or

10.01) at 25°C (77°F).

If the buffer solution temperature is different
from 25°C (77°F), refer to the "pH vs.
temperaturare" chart on page 36 for the ap­propriate pH value at the noted temperature.

The calibration is now complete and the in­strument is ready for use.

Note: If a Pt100 temperature sensor is used,

immerse it into the buffer solutions
during calibration.

Make sure that the instrument
is in measurement mode
(MEASURE LED is on) before
proceeding with calibration.

Measure the temperature of
the calibration buffer with a
ChecktempC or another
accurate thermometer.

Remove the protective cap
from the electrode, rinse and
immerse in pH 7.01 solution
(HI 7007).

Note: The electrode should be

submerged at least 4
cm (1½") into the solu­tion. The thermometer
should be located as
close as possible to the
pH electrode.

Shake briefly and wait one minute before
adjusting the Δ0 trimmer to display the buffer
solution value, i.e. "pH 7.01" at 25°C (77°F).

If the buffer solution temperature is different
from 25°C (77°F), refer to the "pH vs.
temperaturare" chart on page 36 for the ap­propriate pH value at the noted temperature.

pH CALIBRATION

COARSE

SET

FINE

MEA
SURE

4 cm

(1½")

HI 7007

°C

4 cm

(1½")

HI 7004

°C

DOSAGE

ACID BASE

SLOPE

SET

COARSE

FINE

ΔO

SET

MEA
SURE

pH

DOSAGE

ACID BASE

SLOPE

SET

COARSE

FINE

ΔO

SET

MEA

SURE

pH

37

36£

36

pH DIAGNOSTIC TESTS

HI 8510, HI 8710 and HI 8711 are provided

with autodiagnostic functions that allow to
check and troubleshoot any malfunctioning.

The functions are made via front panel keys
to isolate the cause of malfunction whether it
is due to pH electrode contamination, internal
offset circuit or amplifier circuit.

Follow the procedure described below.
First press the MEASURE

key, then one of the following
keys.

A) Sensor Test

Immerse the electrode in
pH7.01 buffer solution
(HI 7007), press SENSOR
TEST key and the display
shows the mV response
of the electrode.

If the electrode is in good working condi­tion, the value should be within ±30 mV.
A value between 30 and 60 mV or -60 and

-30 mV, indicates some contamination of
the electrode.

If the value is higher than 60mV or lower
than -60 mV, the contamination is too
high and the electrode should be replaced.

COARSE

SET

FINE

MEA

SURE

4 cm

(1½")

HI 7007

pH VALUES AT VARIOUS

TEMPERATURE

Temperature has an effect on the pH. The
calibration buffer solutions are affected by
temperature changes to a lesser degree than
normal solutions.

Please refer to the following chart to perform
the pH calibration:

For instance, if the buffer temperature is 25°C
(77°F), calibrate to read on the display pH

4.01 or 7.01 or 10.01.

If the buffer temperature is 20°C, calibrate to
read on the display pH 4.00 or 7.03 or 10.06.

If the buffer temperature is 50°C, calibrate to
read on the display pH 4.06 or 6.98 or 9.82.

TEMP pH VALUE

°C °F 4.01 6.86 7.01 9.18 10.01

0

5
10
15
20
25
30
35
40
45
50
55
60
65
70

32
41
50
59
68
77
86

95
104
113
122
131
140
149
158

4.01

4.00

4.00

4.00

4.00

4.01

4.02

4.03

4.04

4.05

4.06

4.07

4.09

4.11

4.12

6.98

6.95

6.92

6.90

6.88

6.86

6.85

6.84

6.84

6.83

6.83

6.84

6.84

6.85

6.85

7.13

7.10

7.07

7.04

7.03

7.01

7.00

6.99

6.98

6.98

6.98

6.98

6.98

6.99

6.99

9.46

9.39

9.33

9.27

9.22

9.18

9.14

9.10

9.07

9.04

9.01

8.99

8.97

8.95

8.93

10.32

10.24

10.18

10.12

10.06

10.01

9.96

9.92

9.88

9.85

9.82

9.79

9.77

9.76

9.75

SENSOR

TEST

mV

39

38£

38

ORP DIAGNOSTIC TESTS

HI 8512 and HI 8720 are ORP controllers

provided with autodiagnostic functions that
allow to check and troubleshoot any
malfunctioning.
The functions are made via front panel keys
to isolate the cause of malfunction.

For HI 8720 only, press
MEASURE key before
proceeding with the following
tests.

A) 0 mV Test

Press the 0 mV TEST
key and the display
should show a value of
0±10 mV, to verify the
"zero" calibration of the
instrument.

B) 500 mV Test

Press the 500 mV TEST
key and the display should
show a value of 500±20
mV, to verify the slope
at 500 mV.

COARSE

SET

FINE

MEA

SURE

0 mV
TEST

500 mV

TEST

mV

0 mV
TEST

500 mV

TEST

mV

B) Internal Offset Circuit Test

Press the pH7 TEST key and the display
should show a value within 7±1 pH, to
verify the internal circuit of the meter in
terms of the offset compensation.

C) Amplifier Circuit Test

Press the pH4 TEST key and the display
should show a value within the 3.30 to

4.30 pH range, to verify the amplifier circuit
of the meter.

pH

pH 7
TEST

pH 4

TEST

pH

41

40£

40

TAKING REDOX MEASUREMENTS

Redox measurements allow the quantifica­tion of the solution oxidizing/reducing power,
and are commonly expressed in mV.

Oxidation may be defined as the process
during which a molecule (or an ion) loses
electrons and reduction as the process by
which electrons are gained.

Oxidation is always coupled together with
reduction, so that as one element gets oxi­dized, the other is automatically reduced,
therefore the term oxidation-reduction is fre­quently used.

Redox potentials are measured by an elec­trode capable of absorbing or releasing elec­trons without causing any chemical reaction.

The most common ORP electrodes are
provided with gold or platinum surfaces; gold
features a higher resistance than platinum in
conditions of strong oxidation, while platinum
is preferred for measuring oxidizing solutions
containing halides, and for general purposes.

When a platinum electrode is immersed in an
oxidizing solution, a monomolecular layer of
oxygen is developed on its surface. This layer
does not prevent the electrode from function­ing, but it increases the response time. The
opposite effect is obtained when the platinum
surface absorbs hydrogen in the presence of
reducing mediums. This phenomenon is rough
on the electrode.

To make correct redox measurements, it is
necessary that the surface of the electrode is
clean and smooth, and that a preventive
treatment is performed.

Because the Pt/PtO system depends on the
solution pH level, the electrode pre-treatment
may be determined by the pH and the redox
potential of the solution to be measured.

LED INDICATION

All LEDs above the keys indicate the state of
each function, whether it is active or the
display is indicating the mode.

For HI 8711 only

Each LED can be in one of the following
states:

A)Light on The mode is displayed

on the LCD but is not
active, e.g. the alarm
setpoint is displayed but
the alarm contact is
open.

B)Light blinking 25% on, 75% off

The mode is not dis­played but it is active,
e.g. the alarm contact
is closed but the alarm
setpoint is not displayed.

C)Light blinking 75% on, 25% off

The mode is active and
being displayed.

D) Light off The function is neither

active nor displayed.

43

42£

42

ELECTRODE MAINTENANCE

PREPARATION

Remove the protective cap.
DO NOT BE ALARMED IF ANY SALT DE-

POSITS ARE PRESENT. This is normal with
electrodes and they will disappear when rinsed
with water.

During transport tiny air bubbles may form in­side the glass bulb, and the electrode cannot
function properly under these conditions. Remove
the bubbles by "shaking down" the electrode
as you would do with a glass thermometer.

Reference
Filling Hole

Reference
Filling Hole

Fill Hole
Screw

Sensitive

Wire

Reference

Wire

Reference

Junction

Glass

Bulb

Glass
Bulb

Reference
Junction

Reference
Junction

Reference

Junction

Platinum or
Gold tip

Platinum or

Gold tip

Reference
Wire

Reference
Wire

Sensitive
Wire

Glass Body

pH Electrode

Plastic Body

pH Electrode

Plastic Body

ORP Electrode

Glass Body

ORP Electrode

Reference

Wire

Generally, if the ORP (mV) reading corre­sponding to the pH solution value is higher
than the value in the table below, an oxidizing
pre-treatment is necessary; otherwise a re­ducing pre-treatment is necessary:

pH mV pH mV pH mV pH m V pH mV
0 990 1 920 2 860 3 800 4 740
5 680 6 640 7 580 8 520 9 460
10 400 11 340 12 280 13 220 14 16 0

Reducing pre-treatment: immerse the elec­trode for some minutes in HI 7091 solution.

Oxidizing pre-treatment: immerse the elec­trode for some minutes in HI 7092 solution.

If no pre-treatment is performed, the elec­trode will have long response times.

If working with refillable electrodes, always
check the internal electrolyte level and refillwith
HI 7071 solution, if necessary (the level must
be at least 2.5 cm below the filling hole).

If measurements are taken in solutions con­taining sulfides or proteins, the cleaning of
the electrode junction must be performed (see
"Cleaning Procedure" section for details).

To check the correct functioning of the ORP
electrode, immerse it into HI 7020 test
solution and verify that the reading is within
200 and 275 mV.

After the test, rinse the electrode thoroughly
with water and proceed with the oxidizing or
reducing pre-treatment before taking any
measurement.

When not in use, the electrode tip should be
kept moist and far from any type of mechani­cal stress which might cause damage. For
this reason, it is reccommended to store the
electrode with a few drops of HI 70300 storage
solution in the supplied protective cap.

45

44£

44

PERIODIC MAINTENANCE

Inspect electrode and cable. The cable used
for the connection to the meter 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 noted, replace
the electrode.

Rinse off any salt deposits with water.

For refillable electrodes:

Refill the electrode with fresh electrolyte
solution (HI 7071 for single junction electrodes
or HI 7082 for double junction). Allow the
electrode to stand upright for 1 hour.

Follow the above "Storage Procedure".

CLEANING PROCEDURE

General Soak in HI 7061 general cleaning

solution for approximately 1 hour.

Removal of films, dirt or deposits on the mem­brane/junction:

Protein Soak in Hanna HI 7073 protein

cleaning solution for 15 minutes.

Inorganic Soak in Hanna HI 7074 inorganic

cleaning solution for 15 minutes.

Oil/grease Rinse with Hanna HI 7077 oil &

fat cleaning solution.

IMPORTANT: After performing any of the
cleaning procedures, rinse the electrode thor­oughly with distilled water, drain and refill the
reference chamber with fresh electrolyte, (not
necessary for gel-filled electrodes) and soak
the electrode in HI 70300 storage solution for
at least 1 hour before taking measurements.

If the bulb and/or junction are dry, soak the
electrode in HI 70300 storage solution for at
least one hour.

For refillable electrodes:

If the internal electrolyte solution is more than
1cm (½") below the filling hole, add HI 7082
solution (3.5M KCl) for double junction
electrodes or HI 7071 (3.5M KCl+AgCl) for
single junction electrodes.

For a faster response unscrew the filling 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 electrode tip (4 cm) in the sample

and stir gently for approximately 30 seconds.
For a faster response and to avoid cross

contaminations, before taking measurements,
rinse the electrode tip with some solution to
be tested.

STORAGE

To minimize clogging and assure a quick
response time, the electrode glass bulb and
junction should be kept moist at any time.

Store the electrode with a few drops of
HI70300 storage solution in the protective
cap (in its absence, use HI 7071 electrolyte
for single junction, or HI 7082 for double junc­tion electrodes).

Follow the above "Preparation Procedure" be­fore taking measurements.

Note: NEVER STORE THE ELECTRODE IN

DISTILLED WATER OR DRY.

AmpHel® is a registered Trademark of "Hanna Instruments"

47

46£

46

SUGGESTED INSTALLATIONS

SHORT DISTANCE, INDOOR INSTALLATION

Due to the low current involved, a very high
grade of insulation is required.
A dry environment is needed in order to ob­tain a insulation level not lower than 1012Ω.
This type of connection is very delicate and
requires constant attention to maintain proper
operating conditions.
Conventional electrodes should be used in
indoor applications only, with a cable not
longer than 10 m (33').

MEDIUM DISTANCE, INDOOR/OUTDOOR
INSTALLATION

When an outdoor installation is required, to
obtain accurate readings at distances from
10 to 50 m (33-165'), it is necessary to
install a transmitter.
Since the introduction of AmpHel® electrodes,
these distances are no longer a problem.
You can now connect the meter directly to
an AmpHel® electrode, saving the cost of a
transmitter or expensive coaxial cable.
The standard cable length for AmpHel

®

electrodes is 5 m (16.5'). Additional lengths

TROUBLESHOOTING

Evaluate your electrode performance based
on the following:

• Noise (readings fluctuate up and down)
could be due to:

- Clogged/Dirty Junction: refer to the

above "Cleaning Procedure"

- Loss of shielding due to low electrolyte

level (in refillable electrodes only): refill
with HI 7071 solution for single junction
or HI 7082 for double junction electrodes

• Dry Membrane/Junction: soak in HI70300
storage solution for at least 1 hour

• Drifting: soak the electrode tip in warm
HI7082 solution for one hour and rinse the

tip with distilled water; refill with fresh
electrolyte (HI 7071 for single junction and

HI 7082 for double junction electrodes)

• Low Slope: refer to the above "Cleaning

Procedure"

• No Slope: check the electrode for cracks
in glass stem or bulb (replace the elec­trode if cracks are found)

• Slow Response/Excessive Drift: soak the
tip in HI 7061 solution for 30 minutes,
rinse thoroughly in distilled water and then
follow the above "Cleaning Procedure"

• For ORP Electrodes: polish the metal tip
with a light abrasive paper (pay attention
not to scratch the surface) and rinse
thoroughly with water

pH METER

WITH CONVENTIONAL ELECTRODES

MEASUREMENTS CAN BE

TAKEN FROM DISTANCES UP TO

10 METERS (33 FEET)

DRY ENVIRONMENT

LESS THAN 80%

RELATIVE HUMIDITY

MAXIMUM 10 METERS

pH-ORP METER

49

48£

48

ACCESSORIES

pH CALIBRATION SOLUTIONS

HI 7004M pH 4.01 buffer solution, 230 mL
HI 7004L pH 4.01 buffer solution, 500 mL
HI 7006M pH 6.86 buffer solution, 230 mL
HI 7006L pH 6.86 buffer solution, 500 mL
HI 7007M pH 7.01 buffer solution, 230 mL
HI 7007L pH 7.01 buffer solution, 500 mL
HI 7009M pH 9.18 buffer solution, 230 mL
HI 7009L pH 9.18 buffer solution, 500 mL
HI 7010M pH 10.01 buffer solution, 230mL
HI 7010L pH 10.01 buffer solution, 500 mL

ORP SOLUTIONS

HI 7020M ORP test solution @200/275 mV,

230 mL bottle

HI 7020L ORP test solution @200/275 mV,

500 mL bottle

HI 7091M Pre-treatment reducing solution,

230 mL bottle

HI 7091L Pre-treatment reducing solution,

500 mL bottle

HI 7092M Pre-treatment oxidizing solution,

230 mL bottle

HI 7092L Pre-treatment oxidizing solution,

500 mL bottle

ELECTRODE MAINTENANCE SOLUTIONS

HI 70300M Storage solution, 230 mL bottle
HI 70300L Storage solution, 500 mL bottle
HI 7061M General cleaning, 230 mL bottle
HI 7061L General cleaning, 500 mL bottle
HI 7073M Protein cleaning solution, 230 mL
HI 7073L Protein cleaning solution, 500 mL
HI 7074M Inorganic cleaning, 230 mL
HI 7074L Inorganic cleaning, 500 mL
HI 7077M Oil & fat cleaning, 230 mL
HI 7077L Oil & fat cleaning,500 mL
HI 7071 3.5M KCl+AgCl electrolyte

solution (4 x 50 mL)

HI 7072 1M KNO3 electrolyte (4 x 50 mL)
HI 7082 3.5M KCl electrolyte solution (4

x 50 mL)

of regular cable up to 50 m (165'), can be
installed without special connectors.
AmpHel® electrodes feature a built-in a micro­amplifier to boost the signal, drastically re­ducing susceptibility to noise and drift.
The sealed electrode body can stand a mois­ture up to 100% RH without any effect on the
signal.

LONG DISTANCE INSTALLATIONS, ISOLATED
OUTPUT FOR PC INTERFACE

If the needed installation distance is greater
than 50 m (165'), it is necessary the use of a
transmitter.
HANNA instruments® offers a full line of pH
and ORP transmitters with or without display.

AmpHel® is a registered Trademark of "Hanna Instruments"

pH METER

WITH AN AmpHel ELECTRODE

MEASUREMENTS CAN BE

TAKEN FROM DISTANCES UP TO

50 METERS (165 FEET)

WET ENVIRONMENT

RELATIVE HUMIDITY UP TO 100%

MAXIMUM 50 METERS

®

pH-ORP METER

pH METER

WITH A pH TRANSMITTER AND

CONVENTIONAL ELECTRODE

MEASUREMENTS CAN BE

TAKEN FROM DISTANCES UP TO

300 METERS (1000 FEET)

WET ENVIRONMENT

RELATIVE HUMIDITY UP TO 100%

3m

MAXIMUM 300 METERS

pH-ORP METER

51

50£

50

HI 1115S HI 1135B/3

HI 1210T Screwcap PG13.5 connector,

double junction, plastic body

HI 1910B BNC connector, 1 m (3.3') cable,

double junction, plastic body, built­in amplifier

HI 1911B BNC connector, 1 m (3.3') cable,

double junction, plastic body, built­in amplifier

HI 1912B BNC connector, 1 m (3.3') cable,

double junction, plastic body, built­in amplifier

HI 1912B/5 BNC connector, 5 m (16.5') cable,

double junction, plastic body, built­in amplifier

PG13.5 THREAD

φ 12mm

110mm30mm

D

IA 20.5mm

3/4 x 16 UNF

DIA 12mm

110mm

38.5mm

D

IA 20.5mm

3/4 x 16 UNF

DIA 12mm

110mm

38.5mm

D

IA 20.5mm

DIA 9.5mm

3/4 x 16 UNF

DIA 12mm

110mm

38.5mm

D

IA 20.5mm

3/4 x 16 UNF

DIA 12mm

110mm

38.5mm

pH ELECTRODES

HI 1090T Screwcap PG13.5 connector,

double junction, glass body

HI 1110S Screw connector, single junction,

glass body

HI 1130B/3 BNC connector, 3 m (9.9') cable,

single junction, glass body

HI 1110S HI 1130B/3

HI 1110T Screwcap PG13.5 connector,

double junction, glass body

HI 1114S Screw connector, double junction,

plastic body

HI 1134B/3 BNC connector, 3 m (9.9') cable,

double junction plastic body

HI 1114S HI 1134B/3

HI 1115S Screw connector, single junction,

glass body

HI 1135B/3 BNC connector, 3 m (9.9') cable,

single junction, glass body

PG13.5 THREAD

φ 12mm φ 9.5m

m

110mm30mm

DIA 9.5mm

3

/4 x 16 UNF

DIA 12mm

110mm

38.5mm

D

IA 20.5mm

M13 x 1.5

DI

A

1

6

m

m

7

mm

25

mm

PG13.5 THREAD

φ 12mm φ 9.5m

m

110mm30mm

D

IA 20.5mm

3/4 x 16 UNF

DIA 12mm

110mm

38.5mm

M13 x 1.5

DI

A

1

6

m

m

7

mm

25

mm

DIA 12mm

DIA 7.6mm

150mm

25mm

DIA 16.5mm

5mm

M13 x 1.5

DI

A

1

6

m

m

7

mm

25

mm

53

52£

52

HI 3210T Screwcap PG13.5 connector, Pt,

plastic body

HI 3410S Screw connector, Pt, plastic body
HI 3430B/3 BNC connector, 3 m (9.9') cable,

Pt, plastic body

HI 3410S HI 3430B/3

HI 3932B/5 BNC connector, 5 m (16.5') cable,

Pt, plastic body, built-in amplifier

HI 4110S Screw connector, Au, glass body
HI 4130B/3 BNC connector, 3 m (9.9') cable,

Au, glass body

HI 4110S HI 4130B/3

HI 4932B/5 BNC connector, 5 m (16.5') cable,

Au, plastic body, built-in amplifier

PG13.5 THREAD

φ 12mm

110mm30mm

D

IA 20.5mm

3/4 x 16 UNF

DIA 12mm

110mm

38.5mm

M13 x 1.5

DI

A

1

6

m

m

7

mm

25

mm

DIA 20.5mm

3/4 x 16 UNF

DIA 12mm

110mm

38.5mm

D

IA 20.5mm

3/4 x 16 UNF

DIA 12mm

110mm

38.5mm

M13 x 1.5

DIA

16

mm

7

mm

25

mm

DIA 20.5mm

3/4 x 16 UNF

DIA 12mm

110mm

38.5mm

HI 2114B/5 BNC connector, 5 m (16.5') cable,

double junction, plastic body

HI 2910B/5 BNC connector, 5 m (16.5') cable,

double junction, plastic body, built­in amplifier

ORP ELECTRODES

HI 2930B/5 BNC connector, 5 m (16.5') cable,

Pt, plastic body, built-in amplifier

HI 3110S Screw connector, Pt, glass body
HI 3130B/3 BNC connector, 3 m (9.9') cable,

Pt, glass body

HI 3110S HI 3130B/3

HI 3110T Screwcap PG13.5 connector, Pt,

glass body

HI 3115S Screw-type connector, side-arm,

Pt, glass body

HI 3135B/3 BNC connector, 3 m (9.9') cable,

side-arm, Pt, glass body

HI 3115S HI 3135B/3

D

IA 20.5mm

3/4 x 16 UNF

DIA 12mm

110mm

38.5mm

D

IA 20.5mm

3/4 x 16 UNF

DIA 12mm

110mm

38.5mm

D

IA 20.5mm

3/4 x 16 UNF

DIA 12mm

110mm

38.5mm

M13 x 1.5

DI

A

1

6

m

m

7

mm

25

mm

PG13.5 THREAD

φ 12mm φ 1m

m

110mm30mm

DIA 12mm

DIA 7.6mm

150mm

25mm

DIA 16.5mm

5mm

M13 x 1.5

DIA

16

mm

7

mm

25

mm

55

54£

54

WARRANTY

All Hanna Instruments meters are warranted
for two years against defects in workmanship

and materials when used for their intended
purpose and maintained according to
instructions.

Probes, electrodes and sensors are
warranted for a period of six months.

Damages due to accident, misuse, tampering
or lack of prescribed maintenance are not
covered. This warranty is limited to repair or
replacement free of charge.

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
failure. Obtain a Returned Goods Authorization
from the Customer Service department first
and then return the instrument with the
Authorization # included along with shipment
costs prepaid. If the repair is not covered by
the warranty, you will be notified of the charge
for repair or replacement. When shipping any
instrument, make sure it is properly packaged
for complete protection.

All rights are reserved. Reproduction in whole
or in part is prohibited without the written
consent of the copyright owner.

OTHER ACCESSORIES

HI 98501 ChecktempC thermometer with

penetration probe and 0.1°C
resolution (-50.0 to 150.0°C)

HI 8614 pH transmitter
HI 8614L pH transmitter with display
HI 8615 ORP transmitter
HI 8615L ORP transmitter with display
BL PUMPS Dosing pumps with flow rate from

1.5 to 20 lph

HI 7871 & HI 7873

Level controllers

HI 6050 & HI 6051

Submersible electrode holders

HI 6054 & HI 6057

Electrode holders for in-line
applications

HI 778P Coaxial cable and connectors for

screw-type electrodes

HI 8427 pH/ORP electrode simulator with

1 m (3.3') coaxial cable ending
with female BNC connectors
(HI 7858/1)

HI 931001 pH/ ORP electrode simulator with

display and 1 m (3.3') coaxial
cable ending with female BNC
connectors (HI 7858/1)

HANNA instruments reserves the right to modify

the design, construction and appearance of its

products without advance notice.

Recommendations for Users

Before using these products, make sure that they are entirely suitable for the
environment in which they are used.
Operation of these instruments in residential area could cause unacceptable
interferences to radio and TV equipments, requiring the operator to take all
necessary steps to correct interferences.
The trimmers are sensitive to electrostatic discharges. It is recommended to use
antistatic screwdrivers.
Any variation introduced by the user to the supplied equipment may degrade the
instruments' 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 damages or burns, do not perform any measurement in microwave ovens.

56£

56

MANPROCR3 10/05

Australia:

Tel. [phone] • Fax [phone]

China:

Tel. [phone] • Fax [phone]

Egypt:

Tel. & Fax [phone]

Germany:

Tel. [phone] • Fax [phone]

Greece:

Tel. [phone] • Fax [phone]

Indonesia:

Tel. [phone] • Fax [phone]

Japan:

Tel. [phone] • Fax [phone]

Korea:

Tel. [phone] • Fax [phone]

Malaysia:

Tel. [phone] • Fax [phone]

Singapore:

Tel. [phone] • Fax [phone]

South Africa:

Tel. [phone] • Fax [phone]

Taiwan:

Tel. [phone] • Fax [phone]

Thailand:

Tel. [phone] • Fax [phone]

United Kingdom:

Tel. [phone] • Fax [phone]

USA:

Tel. [phone] • Fax [phone]

For e-mail contacts and complete list of Sales and
Technical offices, please see www.hannainst.com

SALES & TECHNICAL SERVICE