Hanna Instruments HI8417, HI8519, HI8520, HI8521 User Manual

Instruction Manual

HI8417 - HI8519
HI8520 - HI8521

Microprocessor

Bench-top

pH Meters

HI 8417

ON

BUFFER VALUES 20°C

d1

NBS

t1

pH

STD

OFF

6,88

d2

pH

NBS

7,02

t2

pH

STD

4,00

d3

pH

NBS

t3

pH

STD

pH

CAL

4,00

9,22

10,05

CON

°C

http://www.hannainst.com

°C

°C

pH

mV

Compliance with the CE Directives

pH

These Instruments are in

Dear Customer,
Thank you for choosing a Hanna Instruments Product.
Please read this instruction manual carefully before using the instru-

ment.
This manual will provide you with all the necessary information for

the correct use of the instrument, as well as a precise idea of its
versatility in a wide range of applications.

These instruments are in compliance with CSA, UL and (EN
50081-1 and EN 50082-1) directives.

TABLE OF CONTENTS

PRELIMINARY EXAMINATION 3
GENERAL DESCRIPTION 3
FUNCTIONAL DESCRIPTION AND SPECIFICATIONS:
HI8417 5
HI8519 8
HI8520 10
HI8521 12

OPERATIONAL GUIDE 14
PH CALIBRATION 18
PROCEDURE FOR HI8417 18
PROCEDURE FOR HI8519 20
PROCEDURE FOR HI8520/HI8521 21
CAL. W/ MANUAL TEMP. COMPENSATION 22
PH VALUES AT VARIOUS TEMPERATURE 23
TEMPERATURE CALIBRATION 23
TROUBLESHOOTING GUIDE 24
ELECTRODE CONDITIONING & MAINTENANCE 25
TEMPERATURE-RESISTANCE CORRELATION
FOR HANNA PH SENSITIVE GLASS 28
ACCESSORIES 30
ELECTRODE APPLICATION REFERENCE GUIDE 37
WARRANTY 38
CE DECLARATION OF CONFORMITY 39

ISO 9000 Certified
Company since 1992

2

PRELIMINARY EXAMINATION

Remove the instrument from the packing material and examine it to
make sure that no damage has occurred during shipping. If there is
any damage, notify your dealer.

Note: Save all packing material until you are sure that the instru-

ment functions correctly. All defective items must be returned
in the original packing with the supplied accessories.

GENERAL DESCRIPTION

HI8417, HI8519, HI8520 and HI8521 Hanna Instruments bench­top pH meters are designed for simplicity of use.

They feature: large liquid crystal display (LCD), user friendly key­board, error codes to guide the user in calibration and troubleshooting
and storage of calibration data even after the unit is shut off.

HI8417, HI8519 and HI8521 can also measure ion concentration
(ISE) and ORP in the mV range (with automatic range switching from
ISE to ORP when reading exceeds ±399.9mV, HI8417 and HI8521
only).

All models, except for HI8519, are microprocessor-based and
provide automatic or manual temperature compensation for
both calibration and measurement.

These models meet the most stringent demands of the laboratory:

HI8417 pH/mV/°C meter automatically recognizes six standard
calibration buffer values-three each for NBS (pH 4.01, 6.86, 9.18)
technical standard calibration buffers (pH 4.01, 7.01, 10.01).

A recorder output of 0 to 2 Volts is available and the wide mV range
and high resolution allow for ORP or ion-selective measurement.

HI8417 comes supplied with HI1131B glass-body combination pH
electrode, HI7669/2W temperature probe (with 1 meter / 3.3' cable),
12VDC adapter (HI710005 or HI710006) and a dust cover.

HI 8519 pH/mV meter includes: manual temperature compensation
and front panel knobs for offset and slope calibration.

HI8519 comes supplied with HI1332B plastic-body combination pH
electrode, 12VDC adapter (HI710005 or HI710006) and a dust
cover.

3

HI8520 pH/°C meter automatically recognizes 3 standard calibration
buffer values (4.01, 7.01 and 10.01 pH).

HI8520 comes supplied with HI1332B plastic-body combination pH
electrode, HI7669/2W temperature probe (with 1 meter/ 3.3' cable),
12VDC adapter (HI710005 or HI710006) and a dust cover.

HI8521 pH/mV/°C meter automatically recognizes 3 standard cali­bration buffer values (4.01, 7.01 and 10.01 pH).

HI8521 comes supplied with HI1332B plastic-body combination pH
electrode, HI7669/2W temperature probe (with 1 meter/ 3.3' cable),
12VDC adapter (HI710005 or HI710006) and a dust cover.

4

FUNCTIONAL DESCRIPTION &

SPECIFICATIONS OF HI8417

THE FRONT PANEL OF HI8417

HI 8417

°C

BUFFER VALUES 20°C

ON

OFF

NBS

d1t1pHpH6,88

STD

pH

d2

NBS

pH

t2

STD

pH

NBS

pH

STDd3t3

7,02
4,00

4,00
9,22

10,05

pH

°C

CAL

CON

pH

mV

°C

ON / OFF To turn the instrument ON and OFF. (Warning:
Push the OFF key before unplugging instrument. If unplugged before
turned off, the meter's memory will be erased).

CAL To enter the calibration mode.
CON To confirm the calibration data.

°C / °C To set temperature for manual compensation.

pH/mV To select mV for mV, ORP or ISE measurements

or pH for pH measurements.

Large LCD on the left

This LCD displays the temperature measured by the HI7669/2W
probe or the value set manually with the keyboard. If the tempera­ture has been set manually, the "°C" symbol will flash. When the
temperature probe is connected the "°C" symbol stops flashing. When
the temperature measured by the probe is out of range (-10 /
+125°C), the "Err3" signal appears.

Large LCD on the right

This LCD displays the pH or mV reading. The corresponding pH or mV
symbol will be displayed along with the measured value. An error
signal ("Err1", "Err2", "Err4" or "Err5") will appear on this display to
indicate when the range is exceeded or if the buffer during calibration
is wrong.

5

THE REAR PANEL OF HI8417

TEMPERATURE

COMBINED
pH or ORP

ELECTRODES

REFERENCE
ELECTRODE

RESET

RECORDER

0-2 VOLT

PROBE

DC POWER
12V to 20V

+

1

23

4

5

6

1. BNC socket for pH and ORP electrode.

2. Reference Jack socket for reference electrode.

3. RESET button.

4. Recorder output connections.

5. Temp. Probe socket (for HI7669/2W).

6. DC Power Socket (for HI710005 or HI710006).

Electrode and probe connections

For combination pH or ORP electrodes (with internal reference) plug
the electrode's BNC to the socket provided (#1).

For an electrode with a separate reference, connect the measuring
electrode's BNC to the BNC socket (#1) and the reference electrode's
jack to the socket provided (#2).

For temperature measurements and automatic temperature com­pensation connect the temperature probe to the °C socket (#5).

Recorder Output
HI8417 is provided with a recorder output from 0 to 2 volts. Connect

the recorder output (#4) and select the pH or mV range by pressing
the pH/mV key. The output signal is related to the values as follows:

pH output:

0.01 pH = 1.42857 mV

e.g. 0.00 pH = 0 mV

7.00 pH = 1000 mV

14.00 pH = 2000 mV

mV output:

0.1 mV= 0.05 mV

e.g. -1999 mV = 0 mV

0.0 mV = 1000 mV

+1999 mV = 2000 mV
The output impedance is 100 ohms. The maximum output short­circuit current is 20 mA.

RESET button

The RESET button (#3) is used when the instrument displays errone­ous messages due to strong electrical interference or when the

6

instrument's power supply is disconnected before the meter is switched
off. Press the RESET button and restart the entire operation.

Power connection

Plug the 12VDC adapter (HI710005 or HI710006) into the DC socket
(#6).

Note: Make sure the main line is protected by a fuse.
Note: HI8417 uses a rechargeable battery to retain the pH calibra-

tion data. It lasts approximately one month when fully charged. The
battery is automatically charged any time the meter is plugged-in
(either turned on or off).

SPECIFICATIONS HI8417
Range pH 0.00 to 14.00

ISE 0.0 to ±399.9mV

ORP ±1999mV

°C -10.0 to 125.0

Resolution pH 0.01

ISE 0.1mV

ORP 0.1/1mV

°C 0.1

Accuracy pH ±0.01
(@ 20°C / 68°F)ISE ±0.2 mV

ORP ±1 mV

°C ±0.5

Typical EMC pH ±0.01
Deviation ISE/ORP ±0.2mV

°C ±0.7

Recorder pH 0 to 2 V
Output mV 0 to 2 V

Max. Current 20mA

Offset ±1 pH
Slope from 85% to 105%
Calibration Automatic 2 points with 5 memorized buffers

(pH 4.01, 6.86, 7.01, 9.18, 10.01)

Temperature Manual from 0 to 100°C (32 to 212°F)
Compensation Automatic from -10 to 125°C (14 to 257°F)
Electrode HI1131B glass body combination refillable

pH electrode (included)
Temp. Probe HI7669/2W Temperature Probe (included)
Input Impedance 1012 ohm
Power Power socket for 12VDC
Environment 0 to 50°C (32 to 122°F);

95% RH (not condensing)

Dimensions 230Lx170Wx70H mm (9.1x6.7x2.7")
Shipping Weight 1.5 Kg (3.3 lb.)

7

FUNCTIONAL DESCRIPTION &

SPECIFICATIONS OF HI8519

THE FRONT PANEL OF HI8519

pH

HI 8519

OFFSET SLOPE TEMPERATURE °C

OFFSET

Temperature

Buffer Values (pH)

°C°F4.01 7.01

0

4.01

32

10

4.00

50

20

4.00

68

30

4.02

86

40

4.04

104

7.13

7.07

7.03

7.00

6.98

SLOPE

10.01

10.32

10.18

10.06

pH

9.96

9.88

mV

TEMPERATURE °C

°C

ON

OFF

ON/OFF To switch the meter ON and OFF.
pH To display pH values.
mV To display mV values.
°C To display temperature values set by the temperature knob

(for pH compensation).

Knobs
OFFSET For adjustment of offset during pH calibration.
SLOPE For adjustment of slope during pH calibration.
TEMP °CFor setting temperature in °C.

THE REAR PANEL OF HI8519

COMBINED pH

ORP

REFERENCE

ELECTRODES

ELECTRODE

12

1. BNC socket for pH or ORP electrode.

2. Reference Jack socket for reference electrode.

3. DC Power Socket (for HI710005 or HI710006).

DC POWER
12V to 20V

3

+

THIS METER IS NOT

PROTECTED BY FUSE

8

Electrode and probe connections

For combination pH or ORP electrodes (with internal reference) plug
the electrode's BNC to the socket provided (#1).

For an electrode with a separate reference, connect the measuring
electrode's BNC to the BNC socket (#1) and the reference electrode's
jack to the socket provided (#2).

Power connection

Plug the 12VDC adapter (HI710005 or HI710006) into the DC socket
(#3).

Note: Make sure the main line is protected by a fuse.

SPECIFICATIONS HI 8519

Range pH 0.00 to 14.00

mV ±1999

Resolution pH 0.01

mV 1

Accuracy pH ±0.01
(@20°C / 68°F) mV ±1
Typical EMC pH ±0.06
Deviation mV ±4
Calibration Manual 2 points through

offset and slope knobs

Temperature Manual from 0 to 100°C
Compensation (32 to 212°F)
Electrode HI 1332B plastic body, combination,

double junction refillable

pH electrode (included)

Input Impedance 1012 ohm
Power 12VDC power
Environment 0 to 50°C (32 to 122°F); 95% RH
Dimensions 230x170x70 mm (9.1x6.7x2.7")
Shipping Weight 1.35 Kg (3 lb.)

9

FUNCTIONAL DESCRIPTION &

SPECIFICATIONS OF HI8520

THE FRONT PANEL OF HI8520

ERROR SYMBOLS

E1: pH out of range
E2: °C out of range
E4: wrong pH 7
E5: wrong pH 4/10

°C

Temperature Buffer Values (pH)

CAL

CON

°F

°C

0

32

10

50

20

68

30

86

40

104

4.01 7.01 10.01

4.01

7.13

4.00

4.00

4.02

4.04

10.32

7.07

10.18

7.03

10.06

7.00

9.96

6.98

9.88

ON

OFF

RANGE

ON / OFF To switch instrument ON and OFF.
RANGE To display pH or temperature measurements.
CAL/CON CAL to enter the calibration procedure and CON to

confirm calibration data.

/ For setting temperature for manual compensation.

THE REAR PANEL OF HI8520

TEMPERATURE

DC POWER
12V to 20V

COMBINED
pH or ORP

REFERENCE

RESET

ELECTRODE

ELECTRODES

23

1

1. BNC socket for pH electrode.

2. Reference Jack socket for reference electrode.

3. RESET button.

4. Temperature Probe socket (for HI7669/2W).

5. DC Power Socket (for HI710005 or HI710006).

Electrode and probes connections

For combination pH electrodes (with internal reference) plug the
electrode's BNC to the socket provided (#1).

For an electrode with a separate reference, connect the measuring
electrode's BNC to the BNC socket and the reference electrode's jack
to the socket provided (#2).

For temperature measurements and automatic temperature com­pensation connect the temperature probe to the °C socket (#4).

RESET button

The RESET button (#3) is used when the instrument displays errone­ous messages due to strong electrical interference or when the
instrument's power supply is disconnected before the meter is switched

PROBE

+

4

5

10

off. Press the RESET button and restart the entire operation.

Power connection

Plug the 12VDC adapter (HI710005 or HI710006) into the socket on
the back of the meter (#5).

Note: Make sure the main line is protected by a fuse.
Note: HI8520 uses a rechargeable battery to retain the pH calibra-

tion data. It lasts approximately one month when fully charged.
The battery is automatically charged any time the meter is
plugged-in (either turned on or off).

SPECIFICATIONS HI 8520

Range pH 0.00 to 14.00

°C 0.0 to 100.0

Resolution pH 0.01

°C 0.1

Accuracy pH ±0.01
(@20°C / 68°F) °C ±0.4
Typical EMC pH ±0.02
Deviation °C ±0.4
Calibration Automatic 2 points with auto-buffer

recogntion

Temperature Automatic or Manual
Compensation From 0 to 100°C (32 to 212°F)
Electrode HI 1332B plastic body, combination,

double junction refillable

pH electrode (included)

Temperature Probe HI 7669/2W temp. probe (included)
Input Impedance 1012 ohm
Power 12VDC power
Environment 0 to 50°C (32 to 122°F); 95% RH
Dimensions 230x170x70 mm (9.1x6.7x2.7")
Shipping Weight 1.35 Kg (3 lb.)

11

FUNCTIONAL DESCRIPTION &

SPECIFICATIONS OF HI8521

THE FRONT PANEL OF HI8521

ERROR SYMBOLS

E1: pH out of range
E2: °C out of range
E3: mV out of range
E4: wrong pH 7
E5: wrong pH 4/10

°C

Temperature Buffer Values (pH)

CAL

CON

°F

°C

0

32

10

50

20

68

30

86

40

104

4.01 7.01 10.01

4.01

7.13

4.00

4.00

4.02

4.04

10.32

7.07

10.18

7.03

10.06

7.00

9.96

6.98

9.88

ON

OFF

RANGE

ON / OFF To switch instrument ON and OFF.
RANGE To display pH / ORP / Temperature measurements.
CAL/CON CAL to enter the calibration procedure and CON to

confirm calibration data.

/ For setting temperature for manual compensation.

THE REAR PANEL OF HI8521

TEMPERATURE

DC POWER
12V to 20V

COMBINED
pH or ORP

REFERENCE

RESET

ELECTRODE

ELECTRODES

23

1

1. BNC socket for pH or ORP electrode.

2. Reference Jack socket for reference electrode.

3. RESET button.

4. Temperature Probe socket (for HI7669/2W).

5. DC Power Socket (for HI710005 or HI710006).

PROBE

+

4

5

Electrode and probes connections

For combination pH or ORP electrodes (with internal reference) plug
the electrode's BNC to the socket provided (#1).

For an electrode with a separate reference, connect the measuring
electrode's BNC to the BNC socket and the reference electrode's jack
to the socket provided (#2).

For temperature measurements and automatic temperature com­pensation connect the temperature probe to the °C socket (#4).

RESET button

The RESET button (#3) is used when the instrument displays errone­ous messages due to strong electrical interference or when the

12

instrument's power supply is disconnected before the meter is switched
off. Press the RESET button and restart the entire operation.

Power connection

Plug the 12VDC adapter (HI710005 or HI710006) into the socket on
the back of the meter (#5).

Note: Make sure your main line is protected by a fuse.
Note: HI8521 uses a rechargeable battery to retain the pH calibra-

tion data. It lasts approximately one month when fully charged.
The battery is automatically charged any time the meter is
plugged-in (either turned on or off).

SPECIFICATIONS HI 8521

Range pH 0.00 to 14.00

ISE 0.0 to ±399.9mV

ORP 0 to ±1999mV

°C 0.0 to 100.0

Resolution pH 0.01

ISE 0.1mV

ORP 1mV

°C 0.1

Accuracy pH ±0.01
(@20°C / 68°F) ISE ±0.2mV

ORP ±0.1mV

°C ±0.4

Typical EMC pH ±0.05
Deviation ISE/ORP ±4mV

°C ±0.1

Calibration Automatic 2 points with auto-buffer

recogntion

Temperature Automatic or Manual
Compensation From 0 to 100°C (32 to 212°F)
Electrode HI 1332B plastic body, combination,

double junction refillable

pH electrode (included)

Temperature Probe HI 7669/2W temp. probe (included)
Input Impedance 1012 ohm
Power 12VDC power
Environment 0 to 50°C (32 to 122°F); 95% RH
Dimensions 230x170x70 mm (9.1x6.7x2.7")
Shipping Weight 1.4 Kg (3.1 lb.)

13

OPERATIONAL GUIDE

pH

TAKING PH MEASUREMENTS

Connect the instrument to the 12VDC adapter (HI710005 or
HI710006). Plug the adapter into the mains.

Make sure that the instrument has been calibrated for pH before
taking pH measurements (see page 18).

For HI8519 only:

• Connect the pH electrode to the meter and switch

the instrument on by pressing the ON/OFF key.

• Immerse the electrode tip (4 cm/1½") into the sample and shake

briefly.

• Take the temperature of the solution with a

ChecktempC or a glass thermometer (e.g.25°C).

ON

OFF

°C

C
°

• Press the °C key to display temperature settings on

the LCD.

• Adjust the Temperature °C knob to display the

temperature of the sample.

• Press the pH key to display the pH measurement.

• The display shows the pH value of the test solution

compensated for temperature.

For HI8417, HI8520, HI8521 only:

• Connect the electrode and the temperature

probe (if automatic temperature compensa­tion is desired).

• Press the ON/OFF key to turn the meter on. The

meter will automatically default to the pH measure­ment mode.

• Immerse the electrode and the temperature probe

in the sample and shake briefly. Wait for 30 sec­onds before taking readings.

• The display shows the pH reading compensated for

temperature.

°C

pH

ON

OFF

14

• In HI8417 the temperature reading is also displayed on the left

LCD.

°C

pH

Note: the electrode should be submerged approximately 4 cm (1½")

into the solution. If the temperature probe is used, it should
be located as close to the pH electrode as possible.

(1½

4 cm

")

If measurements are taken in different samples successively, it is
recommended that the electrode is rinsed thoroughly for better condi­tioning and to eliminate cross-contamination of the sample.

For the rinsing process, it is recommended to use a liberal amount of
the next solution to be measured.

Using refillable electrodes

Unscrew the small refill cap to open the refill hole during measure­ments. After measurement replace the refill hole cap.

MANUAL TEMPERATURE COMPENSATION FOR HI8417,
HI8520 AND HI8521

• When the temperature probe is not connected,

take the temperature of the solution with a
ChecktempC or a glass thermometer.

• Press the RANGE key to enter the temperature mode

(not necessary for HI8417).

15

C
°

°C

RANGE

• When the temperature is set manually,

ºC

"°C" symbol blinks. With the tempera­ture probe connected, the "°C" symbol
is displayed continuously.

• Use the UP or DOWN arrow keys to

°C

°C

manually adjust the display reading
to the value of the reference ther­mometer.

TAKING TEMPERATURE MEASUREMENTS (NOT FOR HI

8519)

• Taking a temperature measurement is very easy.

• Turn the instrument ON and press the RANGE key

RANGE

(for HI8520 and HI8521 only) to get into tem­perature mode.

• Make sure the temperature probe is connected
and allow the reading to stabilize (1 or 2 min­utes).

• The temperature value will be dis­played on the left LCD for HI8417.

°C pH

TAKING ORP MEASUREMENTS

HI8417, HI8519 and HI8521 have the capability to take ORP
measurements, using an ORP electrode. Hanna Instruments offers a
variety of ORP electrodes for this purpose (see page 35). Contact your
Dealer for more information.

Just as pH measurements allow the acidity or the alkalinity of a
substance to be expressed in numbers, oxidation-reduction potential
(redox) measurements provide the quantification of the oxidizing or
reducing power of any liquid.

For HI8519 only:

• Connect the ORP electrode to the meter and
submerge the tip (4 cm / 1½") into the sample
to be tested.

Note: ORP measurements are taken without tem-

perature compensation.

• Press the mV key to enter the mV mode. Allow a few
minutes for the reading to stabilize.

• The display will indicate the absolute
mV value (positive or negative).

mV

mVmV

(1½
")

4 cm

16

For HI8417 and HI8521

• Connect the ORP electrode to the meter and submerge the tip (4
cm / 1½") into the sample to be tested.

Note: ORP measurements are taken without temperature compensa-

tion.

• Press the pH/mV key (HI8417) or
RANGE key (HI8521) once to enter

RANGE

pHpH

mVmV

the mV mode.

• Allow a few minutes for the reading to
stabilize.

• The display will indicate the absolute
mV value (positive or negative).

mV

• When values are less than ±400 mV, tenths of mV are dis­played; for values greater than ±400 mV, the decimal digit
disappears. Note that the change in scale (from 0.1mV to 1mV
resolution) is automatic. "Err2" for HI8417 or "E3" for HI8521
appears if the value exceeds ±1999 mV (out of range).

AFTER MEASUREMENTS

• Press the ON/OFF key again to switch the instru­ment OFF.

ON

OFF

17

PH CALIBRATION

IMPORTANT

The instrument's pH range should be re-calibrated:

• When the meter is new.

• Whenever the pH electrode is replaced.

• At least once a month.

• After use in aggressive chemicals.

• After cleaning procedure and changing the reference electrolyte.

• For greatest accuracy.

INITIAL PREPARATION

Pour small quantities (up to 4cm / 1½" level)
of pH 7.01 (HI7007 or HI8007) and pH4.01
(HI7004 or HI8004) or pH 10.01 (HI7010
or HI8010) solution into clean beakers. If
possible use plastic beakers to minimize any
EMC interferences.

If you are measuring in the acid range use pH4.01 as second buffer
or pH 10.01 if you are measuring in the alkaline range.

Note: with HI8417 HI7006/HI8006 (pH 6.86) and HI7009/HI8009

(pH 9.18) can be used in place of HI7007/HI8007 (pH 7.01)
and HI7010/HI8010 (pH 10.01) respectively.

For accurate calibration, use two bea-

RINSE

kers for each buffer solution; the first
for rinsing the electrode, the second

HI 7007

for calibration. In this way, contami­nation of the buffer is minimized.

Note: the electrode should be submerged approxi-

mately 4 cm (1½") into the solution. If the
temperature probe is used, it should be posi­tioned as close to the pH electrode as possible.

4

0

0

I 7
H

HI 7004 HI 7007

CALIBRATION

HI 7007

(1½
")

4 cm

PH CALIBRATION FOR HI8417

HI8417 provides 6 pre-programmed calibration buffers: three NBS
buffers (d1, d2, d3 i.e. pH 6.86, 4.01, 9.18 respectively) and three
technical buffers (t1, t2, t3 i.e. pH 7.01, 4.01, 10.01 respectively).

When the ATC probe is not used, make sure the temperature is set
manually to reflect the temperature of the solution (see page 23).

18

Procedure:

• Switch the instrument on after connecting the
pH electrode and the temperature probe.

• Immerse the pH electrode and the ATC probe
into a neutral pH buffer solution (pH 7.01
for technical buffers, or pH 6.86 for NBS
buffers).

Shake briefly and wait 1-2 minutes for thermal
equilibrium.

• Press the CAL key. The symbol "d1" will appear
on the display. For calibration with technical
buffers (pH 7.01), press CAL key again
and "t1" will appear on the display.

(Note: the "pH" symbol will be flashing
throughout the calibration procedure).

• Press the CON key. The buffer value will be
displayed on the right LCD.

• Allow 1-2 minutes for the pH reading to stabi­lize.

The pH reading will be temperature compensated.
E.g. if the buffer temperature is at 25°C, the right display will

show "pH 7.01". If the buffer temperature is at 20°C, the display
will show "pH 7.03" (see page 23).

°C

pH

ON

CAL

CON

If "Err4" appears the calibration solution is wrong.
Repeat the process using fresh buffers.

Note: If you are not using the ATC probe, refer to page 22 to

manually correct for temperature.

• Press the CON key again to accept the buffer value.

CON

The first point calibration is now complete.

• If the pH/mV key is pressed at this point, the cali­bration process is ended and only the offset of the meter is
calibrated. This is known as one point calibration. For greatest
accuracy, however, it is recommended that a two-point calibra­tion is performed.

• Rinse the electrode and the temperature probe before immersing
them into pH 4.01/ pH10.01 (or 9.18) calibration buffer, shake
briefly and wait for thermal equilibrium.

19

• The meter automatically recognizes the buffer value and prompts
for the second at "d2" or "t2" (= pH 4.01, acid) or "d3" or "t3"
(pH 9.18 and pH10.01 respectively, alkaline).

CON

• Press the CON key to confirm the pH value.

• The display will indicate the temperature compen­sated buffer value e.g. if the temperature is at 25°C, the display
will show "pH 4.01" or "10.01" or "pH 9.18", depending on the
solution being used. If the temperature is at 20°C, the display
will show respectively "pH 4.00" or "pH 10.06" or "pH 9.22" (see
page 23).

°C

pH

• Press CON key again to confirm calibration. The

CON

meter is now calibrated.

• The pH symbol will stop flashing and the unit is
ready for measurements.

• If the reading is drifting, turn the meter off and repeat the
calibration procedure waiting longer for the reading to stabilize.
However, usually 1 or 2 minutes is enough time to prevent a
drifting reading.

Note: If you need to unplug the instrument, press the OFF key thus

switching the instrument off before disconnecting the power
cord. In this way the instrument will retain the calibration
data. Otherwise, re-calibration might be necessary. In the case
of a power failure while the instrument is operational, re­calibration might be required.

PH CALIBRATION FOR HI8519

Note: If you need to calibrate to NBS standards, use pH 6.86

(HI7006 or HI8006) and pH 9.18 (HI7009 or HI8009) in­stead of pH7.01 and 10.01 respectively.

Use a ChecktempC or a glass thermometer with an resolution of 0.1°

as reference thermometer.

20

Procedure:

• Switch the instrument on after connecting the pH
electrode.

• Rinse and immerse the pH electrode in pH 7.01
buffer and shake briefly. Wait 1 or 2 minutes for
the reading to stabilize.

• Note the temperature of the buffer solution using
a ChecktempC or a glass thermometer (e.g.20°C).

• Press the °C key to select temperature setting. Ad­just the Temperature °C knob until display shows
the noted temperature.

°C

ON

OFF

C

°

°C

°C

TEMPERATURE °C

• Press the pH key to select pH measure­ment.

• Wait 1-2 minutes and adjust the OFFSET
knob until display shows the pH value at
the noted temperature (see the pH versus
temperature chart at page 23).

• Rinse and immerse the pH electrode in
pH 4.01/pH 10.01 buffer and shake

pH

briefly.

• Wait 1-2 minutes and adjust the SLOPE
knob until display shows the pH value at
the noted temperature (see the pH versus
temperature chart at page 23).

• The pH calibration is now complete.

pH

PH CALIBRATION FOR HI8520 AND HI8521

Procedure:

• Switch instrument on after connecting the pH elec­trode and the temperature probe.

• Immerse the pH electrode and the temperature
probe in pH 7.01 buffer solution, shake briefly
and wait 1 or 2 minutes for thermal equilibrium.

• Press the RANGE key to display pH measurement.

OFFSET

SLOPE

pH

ON

OFF

RANGE

(1½

4 cm

")

21

• Press the CAL key. The temperature compensated

CAL

buffer value will be displayed e.g. if the buffer
temperature is at 25°C, the display will show
pH7.01. If the buffer temperature is at 20°C,
display will show pH 7.03 (see page 23). If

pH

"E4" appears the calibration solution is wrong.

• Wait until the pH symbol stops flashing: that
means the reading is stable.

CON

• Press the CON key. The symbol "E5" will appear
to indicate that the electrode is still in pH 7.01
buffer, but expecting a pH 4.01 or 10.01 buffer.

• Rinse the electrode and temperature probe be­fore immersing them into pH 4.01 / pH 10.01 calibration buffer,
shake briefly and wait for thermal equilibrium.

• The symbol "E5" should disappear and the temperature compen­sated buffer value is flashing.

• Wait until the pH symbol stops flashing, press the CON key to
confirm the calibration.

• The pH calibration is now complete.

CALIBRATION WITH MANUAL TEMPERATURE COMPEN­SATION FOR HI8417, HI8520 AND HI8521 ONLY)

If for some reason the temperature probe is defective, or it is required
to calibrate with manual temperature compensation, follow the proce­dure below:

• Unplug the temperature probe from the
meter.

• Note the temperature of the buffer with a
ChecktempC or a glass thermometer.

• Use the UP and DOWN arrow keys to
set the temperature to the noted tem­perature.

• Follow the calibration procedure as for
pH calibration with temperature probe
connected (see page 18 for HI8417 or
page 21 for HI8520/HI8521).

C

°

C
°

ºC

22

PH VALUES AT VARIOUS TEMPERATURE

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

For manual temperature calibration (standard with HI 8519 or op­tional with HI 8417, HI 8520 and HI 8521) please refer to the
following chart.

TEMP pH VALUES

°C °F 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

7.04

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

9.10

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

4.07

6.84

6.98

8.99

9.79

60

140

4.09

6.84

6.98

8.97

9.77

65

149

4.11

6.85

6.99

8.95

9.76

70

158

4.12

6.85

6.99

8.93

9.75

For instance, if the buffer temperature is 25°C, the display should
show pH 4.01, 7.01 or 10.01 at pH 4, 7 or 10 buffers, respectively.

At 20°C, the display should show pH 4.00, 7.03 or 10.06. The meter
reading at 50°C will then be 4.06, 6.98 or 9.82.

TEMPERATURE CALIBRATION

(HI8417, HI8520, HI8521 ONLY)

All Hanna bench-top meters have been accurately temperature cali­brated at the factory. We recommend that you have your bench-top
meters temperature calibrated once a year.

Your nearest Hanna Service Center is available to quickly service your
meter. Contact your Dealer or the nearest Hanna Service Center for
more information.

23

TROUBLESHOOTING

Symptoms are:

The instrument does
not work with the
HI7669/2W probe
(not HI8519)

The meter fails to
calibrate or gives
erroneous results

The meter is slow in
responding or gives
erroneous readouts

The meter does not
accept the 2nd buffer
solution

The reading drifts

"Err1" (for HI8417)
"E 1" (for HI8520/
HI8521) on the
display

"Err3" (for HI8417)
"E 2" (for HI8520/
HI8521) on the
display

"Err2" (for HI8417)
"E 3" (for HI8521)
on the display

"Err4" (for HI8417)
"E 4" (for HI8520/
HI8521) on the

display

"Err5" (for HI8417)
"E 5" (for HI8520/
HI8521) on the
display

The Problem is:

A defective ATC Probe

A defective pH electrode

The electrode is not
working or the dia­phragm is clogged

A defective pH electrode
or bad buffer solution

Temperature not stable

Out of range on the pH
scale

Out of range in °C

Out of range in mV

Erroneous buffer solution
used for offset calibration

Defective electrode

Erroneous buffer solution
used for slope calibra­tion

Defective electrode

Possible Solutions:

Replace the probe.

Replace the electrode and
repeat the pH calibration.

Leave the electrode in a
storage solution after clean­ing the diaphragm.

If the problem is not solved,
replace the electrode and re­calibrate the pH scale.

Try the cleaning procedure.
If this does not work, re­place the electrode and
re-calibrate the pH. Use fresh
buffer solution.

Thermal equilibrium not
reached. Wait longer.

a) Verify the pH electrode is con­nected.

b) Make sure the pH sample is
included between 0 and 14 pH.

c) Check the level of the electrode's
filling electrolyte and the state of
the electrode itself.

Verify the temperature probe
is connected and make sure
the °C is within -10/125°C
for HI8417 or -10/100°C for
HI8520/HI8521.

Verify the temperature probe
is connected and make sure
the mV is within ±1999
range.

Make sure that the buffer
solution used is of pH 7
and replace if necessary.

Replace the electrode and
re-calibrate the pH scale.

Be sure the correct pH buffer
solution is being used for
slope calibration (4.01,

9.18 or 10.01 pH).

Check the electrode and re­place if necessary.

24

ELECTRODE CONDITIONING

AND MAINTENANCE

Reference
Filling Hole

Reference
Filling Hole

Sensitive
Wire

Reference
Wire

Reference
Junction

Glass
Bulb

Reference
Wire

Reference
Junction

Platinum or
Gold tip

Plastic Body

pH Electrode

Reference

Plastic Body

ORP Electrode

Glass Body

pH Electrode

Wire

Glass Body

ORP Electrode

Reference

Wire

Sensitive

Wire

Reference

Junction

Glass

Bulb

Reference

Junction

Platinum or

Gold tip

PREPARATION

Remove the protective cap.
DO NOT BE ALARMED IF ANY SALT DEPOSITS ARE PRESENT. This is
normal with electrodes and 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.

25

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 a 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

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 or HI 7082 or HI 8082 for
double junction electrodes). Follow the Preparation Procedure above
before taking measurements.

Note: NEVER STORE THE ELECTRODE IN DISTILLED OR DEIONIZED WA-

TER.

PERIODIC MAINTENANCE

Inspect the electrode and the cable. The cable used for 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 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.

26

CLEANING PROCEDURE

General Soak in Hanna HI 7061 or HI 8061 General Clean-

ing Solution for approximately ½ hour.

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

- Protein Soak in Hanna HI 7073 or HI 8073 Protein Cleaning

Solution for 15 minutes.

- Inorganic Soak in Hanna HI 7074 or HI 8074 Inorganic Clean-

ing 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.

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 Cleaning Procedure

above.

– Loss of shielding due to low electrolyte level (in refillable

electrodes only): refill with fresh HI 7071 or HI 8071 for
single junction or HI 7082 or HI 8082 for double junction
electrodes.

• Dry Membrane/Junction: Soak in HI 70300 or HI 80300 Stor­age Solution for at least 1 hour.

• Drifting: Soak the electrode tip in warm (approx. 50-60°C)
Hanna HI 7082 or HI 8082 Solutions for one hour and rinse the
tip with distilled water. Refill with fresh HI 7071 or HI 8071 for
single junction electrodes and HI 7082 or HI 8082 for double
junction electrodes (refillable electrodes only).

• Low Slope: Refer to the cleaning procedure above.

• No Slope: Check the electrode for cracks in glass stem or bulb
and replace the electrode.

• Slow Response/Excessive Drift: Soak the tip in HI 7061 or
HI 8061 Solutions for 30 minutes, rinse thoroughly in distilled
water and then follow the Cleaning Procedure above.

27

TEMPERATURE-RESISTANCE

0

0+10+20+30+40+50+60+70+80+90

C

CORRELATION

The resistance of glass electrodes partially depends on the tempera­ture. The lower the temperature, the higher the resistance. It takes
longer 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 10°C.

Ω

Ω

9

2x10

-10

9

1x10

-10

8

2x10

-10

8

1x10

-10

7

2x10

-10

-10

7

1x10

-10

-20-2

-40 -20 0 +10 +20 +30 +40+50 +60 +70 +80 +90 °C

°

Since the resistance of the pH electrode is in the range of 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 for 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

28

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 the
alkaline error and causes the pH to be underestimated. Hanna's glass
formulations have the indicated characteristics.

Alkaline Error

Sodium Ion Correction for the Glass at 20-25°C
Concentration pH Error

0.1 Mol L-1 Na

1.0 Mol L-1 Na

+

+

13.00

13.50

14.00

12.50

13.00

13.50

14.00

0.10

0.14

0.20

0.10

0.18

0.29

0.40

29

ACCESSORIES

pH CALIBRATION SOLUTIONS

HI 70004P pH 4.01 Buffer Sachets, 20mL, 25 pcs
HI 70007P pH 7.01 Buffer Sachets, 20mL, 25 pcs
HI 70010P pH 10.01 Buffer Sachets, 20mL, 25 pcs
HI 7004L pH 4.01 Buffer Solution, 460 mL
HI 7006L pH 6.86 Buffer Solution, 460 mL
HI 7007L pH 7.01 Buffer Solution, 460 mL
HI 7009L pH 9.18 Buffer Solution, 460 mL
HI 7010L pH 10.01 Buffer Sol., 460 mL

pH CALIBRATION SOLUTIONS IN FDA APPROVED
BOTTLES

HI 8004L pH 4.01 Buffer Solution, 460 mL
HI 8006L pH 6.86 Buffer Solution, 460 mL
HI 8007L pH 7.01 Buffer Solution, 460 mL
HI 8009L pH 9.18 Buffer Solution, 460 mL
HI 8010L pH 10.01 Buffer Solution, 460 mL

ELECTRODE STORAGE SOLUTION

HI 70300L Storage Solution, 460 mL

ELECTRODE STORAGE SOLUTION IN FDA APPROVED
BOTTLES

HI 80300L Storage Solution, 460 mL

ELECTRODE CLEANING SOLUTIONS

HI 70000P Electrode Cleaning Sachets, 20 mL, 25 pcs
HI 7061L General Cleaning Sol., 460 mL
HI 7073L Protein Cleaning Sol., 460mL
HI 7074L Inorganic Cleaning Sol., 460mL
HI 7077L Oil & Fat Cleaning Sol.,460 mL

ELECTRODE CLEANING SOLUTIONS IN FDA
APPROVED BOTTLES

HI 8061L General Cleaning Solution, 460 mL
HI 8073L Protein Cleaning Solution, 230 mL
HI 8077L Oil & Fat Cleaning Solution, 460mL

REFILL ELECTROLYTE SOLUTIONS

HI 7071 3.5M KCl + AgCl Electrolyte, 4x50mL, for single

junction electrodes

HI 7072 1M KNO3 Electrolyte, 4x50 mL

30

HI 7082 3.5M KCl Electrolyte, 4x50 mL, for double junction

electrodes

REFILL ELECTROLYTE SOLUTIONS IN FDA APPROVED
BOTTLES

HI 8071 3.5M KCl + AgCl Electrolyte, 4x50mL, for single

junction electrodes

HI 8072 1M KNO3 Electrolyte, 4x50 mL
HI 8082 3.5M KCl Electrolyte, 4x50 mL, for double junction

electrodes

ORP PRETREATMENT SOLUTIONS

HI 7091L Reducing Pretreatment Solution, 460 mL
HI 7092L Oxidizing Pretreatment Solution, 460 mL

pH & ORP ELECTRODES

All electrodes part numbers ending in B are supplied with a BNC
connector and 1 m (3.3') cable.

HI 1043B

Glass-body, double junction, refillable, combination pH electrode.
Use: strong acid/alkali.

12 mm

0.5"

HI 1043

"S" VERSION

9.5mm DIA

120 mm

4.7"

0.37"

HI 1053B

Glass-body, triple ceramic, conic shape, refillable, combination pH
electrode. Use: emulsions.

12 mm

0.5"

HI 1053

31

120 mm

4.7"

"S" VERSION

HI 1083B

Glass-body, micro, Viscolene, non-refillable, combination pH elec-
trode. Use: biotechnology, micro titration.

HI 1083

12 mm

0.5"

5 mm

0.2"

120 mm

3 mm

0.12"

"

3.0 mm DIA

0.12"

HI 1131B

Glass-body, single junction, refillable, combination pH electrode.
Use: general purpose.

12 mm

0.5"

HI 1131

"S" VERSION

9.5mm DIA

120 mm

4.7"

0.37"

HI 1330B

Glass-body, semimicro, single junction, refillable, combination pH
electrode. Use: laboratory, vials.

HI 1330

"S" VERSION

120 mm

4.7"

5mm DIA

0.2"

5mm

0.2"

HI 1331B

Glass-body, semimicro, single junction, refillable, combination pH
electrode. Use: flasks.

HI 1331

"S" VERSION

8 mm

0.3"

7.5mm DIA

210 mm

8.25"

0.29"

HI 1230B

Plastic-body (Ultem®), double junction, gel-filled, combination pH
electrode. Use: general, field.

12 mm

0.5"

HI 1230

120 mm

"

"

4.7"

32

HI 2031B

Glass-body, semimicro, conic, refillable, combination pH electrode.
Use: semisolid products.

6 mm

0.25"

HI 2031

75 mm

"

"

2.95"

HI 1332B

Plastic-body (Ultem®), double junction, refillable, combination pH
electrode. Use: general purpose.

12 mm

0.5"

HI 1332

"S" VERSION

120 mm

4.7"

FC 100B

Plastic-body (Kynar®), double junction, refillable, combination pH
electrode. Use: general purpose for food industry.

12 mm

0.5"

FC 100

120 mm

4.7"

FC 200B

Plastic-body (Kynar®), open junction, conic, Viscolene, non-refillable,
combination pH electrode. Use: meat & cheese.

6 mm

0.25"

FC 200

75 mm

2.95"

33

FC 210B

Glass-body, double junction, conic, Viscolene, non-refillable, combi­nation pH electrode. Use: milk, yogurt.

12 mm

0.5"

FC 210

120 mm

4.7"

FC 220B

Glass-body, triple-ceramic, single junction, refillable, combination pH
electrode. Use: food processing.

12 mm

0.5"

FC 220

9.5mm DIA

120 mm

4.7"

0.37"

FC 911B

Plastic-body (Kynar®), double junction, refillable with built-in ampli­fier, combination pH electrode. Use: very high humidity.

12 mm

0.5"

FC 911

110 mm

4.3"

HI 1413B

Glass-body, single junction, flat tip, Viscolene, non-refillable, combi­nation pH electrode. Use: surface measurement.

12 mm

0.5"

HI 1413

110 mm

4.3"

Ultem® is registered Trademark of "General Electrics Co."
Kynar® is registered Trademark of "Pennwalt Corp."

34

ORP electrodes:

HI 3131B

Glass-body, refillable, combination platinum ORP electrode.
Use: titration.

12 mm

0.5"

HI 3131

150 mm

"S" VERSION

5.9"

HI 3230B

Plastic-body (Ultem®), gel-filled, combination platinum ORP elec-
trode. Use: general purpose.

12 mm

0.5"

HI 3230

120 mm

"S" VERSION

4.7"

HI 4430B

Plastic-body (Ultem®), gel-filled, combination gold ORP electrode.
Use: general purpose.

12 mm

0.5"

HI 4430

120 mm

"S" VERSION

4.7"

Extension cables for screw-type electrodes only (screw to BNC
connector):
HI7855/1 Extension cable 1m (3.3') long
HI7855/3 Extension cable 3m (9.9') long
HI7855/5 Extension cable 5m (16.5') long

HI 7855 SERIES CABLE CONNECTORS

CONNECTOR AND 3.0 mm (0.12") CABLE WITH BNC

CONNECT TO
SCREW TYPE
ELECTRODES

35

CONNECT TO THE

BNC SOCKET

OF THE METER

HI7855/10 Extension cable 10m (33') long
HI7855/15 Extension cable 15m (49.5') long

Power Units:

HI710005 Voltage adapter from 115 VAC to 12 VDC
HI710006 Voltage adapter from 230 VAC to 12 VDC

OTHER ACCESSORIES

ChecktempC Pocket-size thermometer (range -50.0 to 150.0°C)
HI 76405 Electrode holder

HI 7669/2W Temperature probe with 1 m (3.3') screened cable (not

for HI 8519)

HI 8427 pH and ORP electrode simulator with 1 m (3.3') co-

axial 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

MANPHBNR3 Instructions manual

36

ELECTRODE APPLICATION

REFERENCE GUIDE

Application Electrodes

1. Aquarium HI 1332B, HI 1911B

2. Bath-water HI 1910B, HI1130B

3. Beer HI 1131B

4. Bread HI 2031B, FC200B

5. Cheese FC 200B

6. Dairy products FC 911B, FC100B

7. Dirty water HI 1910B, HI 1912B

8. Emulsions HI 1053B

9. Environment HI 1230B

10. Flasks HI 1331B

11. Food industry general use FC 911B, FC 100B

12. Fruit FC 200B, FC 220B

13. Fruit juices, organic FC210B

14. Galvanizing waste solution HI 1130B, HI1912B

15. Heavy-duty applications HI 1135B

16. High purity water HI 1053B

17. Horticulture HI 1053B, FC 200B

18. In-line applications HI 1134B, HI1135B, HI 2114B, HI 2910B

19. Laboratory general use HI 1131B, HI 1230B, HI1332B, HI 1330B

20. Leather HI 1413B

21. Lemon juice FC 100B

22. Meat FC 200B, HI 2031B

23. Micro plate sampling of less than HI1083B
100 mL

24. Milk and Yogurt FC210B

25. Paints HI 1053B

26. Paper HI 1413B

27. Photographic chemicals HI 1230B

28. Quality control HI 1332B

29. Sausages FC 200B, HI2031B

30. Semisolid products HI 2031B

31. Skin HI 1413B

32. Soil samples HI1230B

33. Solvents HI 1043B

34. Strong acid HI 1043B

35. Submersion application HI 1130B

36. Surface measurements HI 1413B

37. Swimming pool H I1130B, HI 2114B, HI 2910B

38. Titrations with constant HI1131B
temperature range

39. Titrations with wide temperature HI 1131B
range

40. Very high humidity FC 911B, HI 1912B, HI 1911B

41. Vials and test tube HI 1330B

42. Wine processing FC 220B

37

WARRANTY

All Hanna Instruments meters are guaranteed for two years against
defects in workmanship and materials when used for their intended
purpose and maintained according to instructions. The electrodes
and the probes are guaranteed for a period of six months. This
warranty is limited to repair or replacement free of charge.

Damage due to accident, misuse, tampering or lack of prescribed
maintenance are 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 failure. 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 Cus­tomer Service department and then send it with shipping costs prepaid.
When shipping any instrument, make sure it is properly packaged for
complete protection.

To validate your warranty, fill out and return the enclosed warranty
card within 14 days from the date of purchase.

All rights are reserved. Reproduction in whole or in part is prohibited
without the written consent of the copyright owner,
Hanna Instruments Inc., 584 Park East Drive, Woonsocket, Rhode
Island, 02895 , USA.

Hanna Instruments reserves the right to modify the design, con­struction and appearance of its products without advance notice.

38

CE DECLARATION OF CONFORMITY

DECLARATION OF CONFORMITY

We

Hanna Instruments Srl
V.le delle industrie 12
35010 Ronchi di Villafranca (PD)
ITALY

herewith certify that the bench pH meters

have been tested and found to be in compliance with the following regulations:

HI 8417 HI 8519 HI 8520 HI 8521

IEC 801-2 Electrostatic Discharge
IEC 801-3 RF Radiated
IEC 801-4 Fast Transient
EN 55022 Radiated, Class B

Date of Issue: 20-12-1995

D.Volpato - Engineering Manager

On behalf of

Hanna Instruments S.r.l.

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 equipment,
requiring the operator to take all necessary steps to correct interferences.

The glass bulb at the end of the electrode is sensitive to electrostatic discharges. Avoid touching this glass bulb at all
times.

During calibration of instruments, ESD wrist straps should be worn to avoid possible damage to the electrode by
electrostatic discharge.

To maintain the EMC performance of equipment, the recommended cables noted in the user's manual must be used.

In particular cases the instruments could turn off. In such cases, turn them on by pressing the ON/OFF key.

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 24VAC or 60VDC.

To avoid damage or burns, do not perform any measurement in microwave ovens.

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