Hanna Instruments HI 931402 User Manual

Instruction Manual

HI 931402
HI 931410

Microprocessor

Bench-top

pH Meters

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This Instrument is in Compliance with the CE Directives

www.hannainst.com

Dear Customer,
Thank you for choosing a Hanna Instruments
Product.
Please read this instruction manual carefully
before using the instrument.
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 ........................... 1

General Description .................................. 1

Functional Description LCD ...................... 3

Functional Description HI 931402 ............. 4

Specifications HI 931402 .......................... 5

Functional Description HI 931410 ............. 6

Specifications HI 931410 .......................... 7

Operational Guide ..................................... 8

pH Calibration ......................................... 15

pH Values at Various Temperature .......... 26

Temperature and mv Calibration............. 27

Interface with PC (HI 931402 only) ......... 28

Additional Calibration Procedures &

Information for HI 931402 only ................ 29

Troubleshooting for HI 931402 ................ 33

Troubleshooting for HI 931410 ................ 34

Electrode Conditioning and Maintenance .. 35
Temperature-Resistance Correlation

for Hanna pH Sensitive Glass ................. 39

Accessories ............................................. 41

Electrode Application Reference Guide .. 50

Warranty.................................................. 51

CE Declaration of Conformity ................. 53

ISO 9000 Certified
Company since 1992

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

GENERAL DESCRIPTION

Hanna Instruments HI 931402 and HI 931410
are bench pH meters for pH, ORP (Oxidation
Reduction Potential), ISE (Ion Selective Elec­trode) and temperature measurements.

Their built-in microprocessor ensures accu­rate and user-friendly operation.

pH measurements are manually or automati­cally compensated for the temperature effect
(MTC/ATC).

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.

HI 931402 will not allow calibration until the
electrode has stabilized to ensure accurate
pH measurements.

These models meet the most stringent de­mands of the laboratory: they both automati­cally recognize five standard calibration buff­ers (pH 4.01, 6.86, 7.01, 9.18, 10.01).

In HI 931410 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.

1

In HI 931402, through the RS 232C serial port
you can transfer sample measurements to a
PC.

HI 931402 comes supplied with HI 1131B glass­body combination pH electrode, HI 7669/2W
temperature probe (with 1 meter / 3.3' cable),
HI 76405 electrode holder, pH 4.01 and
pH 7.01 buffer solutions (30 ml each), HI 7071
reference electrolyte (30 ml), 12VDC adapter
(HI 710005 or HI 710006) and a dust cover.

HI 931410 comes supplied with HI 1131B glass­body combination pH electrode, HI 7669/2W
temperature probe (with 1 meter / 3.3' cable),
12VDC adapter (HI 710005 or HI 710006) and
a dust cover.

2

FUNCTIONAL DESCRIPTION LCD

Primary Display

HI 931402

MEM

CAL

NOT READY

CON WRONG
LOW BAT

BUF

2

pH

mV

°C1

pH

Secondary Display

HI 931410

°C

pH

Temperature Display pH/mV Display

3

FUNCTIONAL DESCRIPTION HI 931402

ins rum n

MEM

1

CAL

NOT READY
CFM WRONG

BUF

2

pH

mV

°C1

pH

CAL Start calibration

/ Select buffer1 value

CFM Confirm when ready

/ Select buffer2 value

CFM Confirm when ready

HI 931402
MICROPROCESSOR
pH METER

MR

CAL

COMM

RANGE

CFM

pH calibration procedure

s

°CMEM

°C

Function

MEM For storing display result

MR Recall previous stored data

COMM For RS232 configuration

RANGE Select pH or ORP measurement

OFF

ON

10

2345 678

1. Liquid Crystal Display

2. MEM key to store a value in memory

3. MR key to recall the stored value

4. CAL key to enter and exit the calibration mode

5. CFM key to confirm calibration values

6. RANGE key to select the measurement range

7. COMM key to set the baud rate

↑↑

8.

↑°C and

↑↑

↓↓

↓°C keys to manually set tempera-

↓↓

ture and to select pH buffer values

9. ON to turn the meter on

10. OFF key to turn the meter off

9

DTR

TXD

GND

COMBINATION

pH

REFERENCE

ELECTRODE

ELECTRODE

TEMPERATURE

PROBE

RESET

1

23 4 5 6 7

RXD

1

5

ooooo
oooo

96

RS-232

ooooo

oooo

DSR

1. BNC Connector

2. Reference Electrode Connector (Ø 0.08")

3. Reference Electrode Connector (Ø 4 mm)

4. Temperature Probe Connector

5. Reset Button

6. RS 232C Connector

7. DC Power Socket (for HI 710005 or
HI 710006)

4

SPECIFICATIONS HI 931402

Range pH 0.00 to 14.00

ISE ±399.9 mV

ORP ±1999 mV

°C 0.0 to 100.0

Resolution pH 0.01

ISE 0.1 mV

ORP 1 mV

°C 0.1

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

ORP ±1mV

°C ±0.5

Typical EMC pH ±0.02
Deviation ISE ±0.5 mV

ORP ±1 mV

°C ±2

pH Calibration Automatic 1 or 2 points with

5 memorized buffers

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

Temperature Automatic or manual
Compensation from 0 to 100°C (32 to 212°F)

Electrode HI1131B glass body combination

refillable pH electrode (included)

Temperature HI 7669/2W (included)
probe

Input impedance 10

12

Ω

Computer RS 232C (optoisolated)
Interface

Power supply 12 VDC (CSA, UL & CE approved)

Environment 0 to 50°C (32 to 122°F); 95% RH

Dimensions 230x170x70 mm (9.1x6.7x2.7")

Shipping Weight 1.3 kg (2.9 lb.);

kit with holder: 3.2 kg (7 lb.)

5

FUNCTIONAL DESCRIPTION HI 931410

°C

HI 931410

T Buffer Values (pH)

°C 4.01 7.01 10.01

ON

0 4.01 7.13 10.32
10 4.00 7.07 10.18
20 4.00 7.03 10.06

OFF

30 4.02 7.00 9.96

1

40 4.04 6.98 9.88

23

pH

°C

CAL

CON

pH
mV

°C

4

5

1. ON and OFF keys to turn the instrument on
and off. (Warning: Push OFF before unplug­ging instrument. If unplugged before turned
off, the meter's memories will be erased)

2. CAL key to enter the calibration mode

3. CON key to confirm the calibration data

4.°C and °C keys to set temperature during
manual compensation adjustment

5. pH/mV key to select the mV (mV, ORP or ISE
measurements) or the pH range

6. Liquid Crystal Displays

TEMPERATURE

DC POWER
12V to 20V

COMBINED
pH or ORP

ELECTRODES

REFERENCE
ELECTRODE

RESET

RECORDER

0-2 VOLT

PROBE

+

6

1

23

4

5

6

1. BNC Connector

2. Reference Electrode Connector

3. RESET button

4. Recorder Output Connector

5. Temperature Probe Connector

6. DC Power Socket (for HI 710005 or HI 710006)

6

SPECIFICATIONS HI 931410

Range pH

ISE

ORP

°C

Resolution pH

ISE

ORP

°C

Accuracy pH

(@ 20°C / 68°F) ISE

ORP

°C

Typical EMC pH
DeviationISE/ORP

°C

Recorder pH
Output m V

Max. Current

Offset

Slope

Calibration

Temperature
Compensation

Electrode

Temp. Probe

Input Impedance

Power

Environment

Dimensions

Shipping Weight

0.00 to 14.00

0.0 to ±399.9mV
±1999mV

-10.0° to 125.0

0.01

0.1mV

0.1/1mV

0.1

±0.01

±0.2 mV

±1 mV

±0.5

±0.01

±0.2mV

±0.7

0 to 2 V
0 to 2 V

20mA

±1 pH

from 85% to 105%

Automatic 1 or 2 points with

3 memorized buffers

(pH 4.01, 7.01, 10.01)

Manual from 0 to 100°C (32 to 122°F)

Automatic from -10 to 125°C (14 to 257°F)

HI 1131B glass body combination

refillable pH electrode (included)

HI 7669/2W (included)

12

10

Ω

12VDC (CSA, UL & CE approved)

0 to 50°C (32 to 122°F); 95% RH

230x170x70 mm (9.1x6.7x2.7")

1.5 Kg (3.3 lb.)

7

OPERATIONAL GUIDE

ELECTRODE AND PROBE CONNECTIONS

For combination pH or ORP electrodes (with
internal reference) plug the electrode's BNC
to the socket provided (see pages 4 and 6, #1).

For electrode with separate reference, con­nect the measuring electrode's BNC to the
BNC socket (see pages 4 and 6, #1) and the
reference electrode's plug to the socket pro­vided (see page 4, #2 or #3 for HI 931402, or
page 6, #2 for HI 931410).

For temperature measurements and auto­matic temperature compensation connect the
temperature probe to the °C socket (see
page 4, #4 for HI 931402, or page 6, #5 for
HI 931410).

POWER CONNECTION

Plug the 12VDC adapter (HI 710005 or
HI 710006) into the DC socket (see page 4,

#7 for HI 931402, or page 6, #6 for HI 931410).
Plug the adapter to the mains.

Note: Make sure the main line is protected

by a fuse.

HI931402 uses an EEPROM and HI 931410
uses a rechargeable battery to retain the pH
calibration, mV calibration, temperature cali­bration as well as the serial communication
setting. The instrument will store the respec­tive data after a calibration or serial communi­cation setting, even when it is not plugged-in.
In HI 931410 the battery lasts approximately
one month when fully charged, and it is auto­matically charged any time the meter is
plugged-in (either turned on or off).

8

pH MEASUREMENTS

To take a pH measurement
simply submerge the tip
(4 cm/1½") of the electrode

(1½
")

and the temperature probe into
the sample to be tested.

Turn the instrument on by pressing the ON
key.

ON

ON

The meter automatically defaults to the pH
measurement mode.

Allow 1 or 2 minutes for the electrode to stabilize.

In HI 931402 pH is displayed on the primary
display and temperature on the secondary
one, whereas in HI 931410 pH is displayed
on the left LCD.

pH

°C

°C

pH

4 cm

In order to take accurate pH measurements,
make sure that the instrument has been cali­brated for pH before use (see page 15).

In HI 931402, if the calibra­tion data is lost or the meter
is not calibrated, the "CAL"
indicator is displayed to

CAL

prompt the user to perform a
calibration. If the user chooses
not to do it and presses the
CAL key to quit from the cali­bration mode, the offset and

CAL

slope of the instrument are
set to 0 mV and 100% of the
theoretical value respectively.

9

pH

°C

If measurements are taken in different samples
successively, it is recommended that the
electrode and the temperature probe are rinsed
thoroughly for better conditioning, and then
blot dry between each measurements. For
this rinsing process, it is recommended to
use a liberal amount of the sample 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.

The pH reading is directly affected by
temperature. In order for the meter to measure
the pH accurately, temperature must be taken
in consideration.

A perfect equilibrium between the pH
electrode and the sample is reached in
approximately 15 minutes.

To use the meter's Automatic

Temperature Compensation

feature, submerge the
HI7669/2W temperature
probe into the sample as
close to the electrode as
possible and wait for 1-2
minutes.

MANUAL TEMPERATURE COMPENSATION

If you know the temperature of the sample to
be tested you can manually compensate for it.

If manual temperature compensation is
desired the temperature probe must be
disconnected from the instrument.

10

The display will then show
the default temperature (25°C
in HI 931402 or 20°C in
HI 931410) or the last recorded
temperature reading (HI 931402
only). "°C" is blinking.

Note the temperature of the
sample using a ChecktempC
or a glass thermometer.

°C

ºC

°C

°C

ºC

Use the UP or DOWN arrow
keys to manually adjust the
display reading to the value of
the reference thermometer.

°C

If the temperature probe is connected to the
meter, the secondary or the temperature LCD
figure display the measured temperature read­ing and the "°C" indicator does not blink.

Pressing the ↑°C or ↓°C keys will not alter

the temperature reading.

If measurements are taken in different samples
successively, it is recommended that the elec­trode and the temperature probe are rinsed
thoroughly with deionized water or distilled
water (if not available, tap water may also be
used) and then blot dry between each mea­surements.

ORP MEASUREMENTS

HI 931402 and HI 931410 have the capability to
take ORP measurements, using an optional
ORP electrode.
Hanna Instruments offers a variety of ORP
electrodes for this purpose (see page 47). 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

11

°C

oxidizing or reducing power of the sample tested.

To correctly perform an ORP measurement, the
surface of the ORP electrode must be clean and
smooth.

When not in use, the tip of the electrode should
be kept moist and safe from any mechanical
stress which might cause damage to the glass/
platinum junction.

To get into the "mV" mode
(ORP or ISE measurements)
turn the instrument ON and

pHpH
mVmV

RANGE

press the RANGE (HI 931402)
or the pH/mV (HI 931410)
key.

To measure the mV of a
solution simply submerge the
ORP or ISE electrode tip
(4 cm/1½") into the sample
to be tested. Allow a few

(1½
")

minutes for the readings to
stabilize.

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

mV

4 cm

mV

ºC

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 01. mV to 1 mV as
resolution) is automatic.

"---" for HI 931402 or "Err2" for
HI 931410 appear if the value
exceeds ±1999 mV (out of
range).

Note: ORP measurements are taken without

temperature compensation.

12

mV

°C

TEMPERATURE MEASUREMENTS

Taking a temperature measurement is very
easy.

Connect the temperature probe to the
instrument and turn the instrument ON.

Dip the liquid/general
purpose temperature probe
HI 7669/2W into the sample
and allow the reading on the
secondary display to stabilize
(1 or 2 minutes).

The temperature value will be displayed on
the secondary LCD for HI 931402 and on the
left LCD for HI 931410.

pH

°C

°C

pH

HOLD FUNCTION (for HI 931402 only)

To hold and memorize the
measured value, press the

MEM

MEM key.

The last reading will be fro­zen on the display until the
key is released.

At the same time, this reading is stored in
the memory.

During this operation, the MEM indicator is
lit.

To recall the stored memory value, press the
MR key button and the memorized reading
will be displayed with the MEM indicator lit.

MR

13

MEM

pH

°C

RESET BUTTON

The RESET button (see page 4, #5 for
HI 931402, or page 6, #3 for HI 931410) is
used when the instrument displays erroneous
messages due to strong electrical interfer­ence or when the instrument's power supply
was disconnected before the meter was
switched off.

It is necessary to press the reset button and
restart the entire operation.

Calibration points should remain memorized.
It is recommended to verify calibration before
proceeding.

RECORDER OUTPUT (for HI 931410 only)

HI 931410 is provided with a recorder output
from 0 to 2 volts. Connect the recorder output
(see page 6, #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 short-circuit current is 20 mA.

AFTER MEASUREMENTS

Press the OFF key to switch the instrument off.

OFF

OFF

14

pH CALIBRATION

It is recommended to calibrate the instrument
frequently, especially if high accuracy is re­quired.

The instrument should be re-calibrated for
pH:

• Whenever the pH electrode or temperature
probe is replaced.

• At least once a month.

• After testing aggressive chemicals.

• After cleaning procedure and changing the
reference electrolyte.

• If greatest accuracy is required.

PREPARATION

Pour small quantities of the buffer solutions
into clean beakers. If possible use plastic
beakers to minimize any EMC interferences

HI 7004

HI 7004

HI 7007

To get accurate readings, use pH 7.01 and
pH 4.01 if you are going to measure acid
samples or pH 7.01 and pH 10.01 for alkaline
measurements.

For accurate calibration use two beakers for
each buffer solution, the first one for rinsing
the electrode, the second one for calibration.
In this way contamination of the buffers is
minimized.

RINSE

HI 7007

CALIBRATION

HI 7007

15

PROCEDURE FOR HI 931402

Calibration of HI 931402 has a choice of 5
memorized standard buffers: 4.01, 6.86, 7.01,

9.18 and 10.01 pH.

• Make sure that the meter is in pH mode.

• Remove the protective cap from the elec­trode and rinse it with some of the buffer
calibration solution you are going to use first.

ONE POINT CALIBRATION

One point calibration at pH 6.86 (NBS):

• Immerse the pH electrode

and the temperature probe
into pH 6.86 buffer solution
and shake briefly.

HI 7006

Note: the electrode should
be submerged approxi­mately 4 cm (1½") into the
solution. The temperature

(1½
")

probe should be located as
close as possible to the pH electrode.

• Press the CAL key. The "CAL" and "

BUF

indicators will be displayed. The second­ary LCD will display "4.01".

4 cm

1

"

CAL

CAL

1

BUF

pH

• Press the °C key. The secondary display
will change to “6.86”.

°C

CAL

1

BUF

pH

• When the electrode is submerged in the
buffer solution, the meter will notify the
user if the reading is not stable.
If the readings fluctuate the
LCD will blink "NOT READY".

16

NOT READY

Only when the reading is
stable, "READY" and "CON"

READY

CON

will blink.

• Press the CFM key to con­firm the calibration. If the
reading is not close to the

selected buffer, "WRONG

BUF

1

"

CFM

and "WRONG " will blink
alternatively. If the reading
is close to the selected

WRONG

WRONG

1

buffer, the meter stores the

BUF

reading (and adjusts the off­set point). The buffer value is
then displayed on the primary
LCD and the secondary LCD

CAL

1

BUF

will display "4.01".

• Press the CAL key and the

CAL

calibration process is ended
with only the offset of the
meter calibrated.

For best accuracy however, it is recommended
that a two point calibration is performed (see
page 19).

One point calibration at pH 7.01 (STAN­DARD):

• Immerse the pH electrode

and the temperature probe
into pH 7.01 buffer solution

HI 7007

and shake briefly.

Note: the electrode should be
submerged approximately
4 cm (1½") into the solution.
The temperature probe should
be located as close as pos-

(1½
")

sible to the pH electrode.

• Press the CAL key. The “CAL” and “

BUF

indicators will be displayed. The second­ary LCD will display “4.01”.

CAL

17

CAL

1

BUF

pH

pH

4 cm

1

”

• Press the °C key twice. The secondary
display will change to “7.01”.

°C

CAL

1

BUF

pH

• When the electrode is submerged in the
buffer solution the meter will notify the
user the reading is not stable.
If the readings fluctuate the
LCD will blink “NOT

NOT READY

READY”.
Only when the reading is
stable, “READY” and “CON”

READY

CON

will blink.

• Press the CFM key to con­firm the calibration. If the
reading is not close to the

selected buffer, “WRONG

BUF

1

”

CFM

and “WRONG ” will blink al­ternatively. If the reading is
close to the selected buffer

WRONG

WRONG

1

BUF

the meter stores the read­ing (and adjust the offset
point). The buffer value is
than displayed on the pri­mary LCD and the second-

CAL

1

BUF

ary LCD will display “4.01”.

• Press the CAL key and the
calibration process is ended

CAL

with only the offset of the
meter calibrated.

pH

pH

For best accuracy however, it is recommended
that a two point calibration is performed (see
page 19).

18

TWO POINT CALIBRATION

F

A two point calibration is recommended for
best accuracy. As a second point use pH 4.01
if you are going to measure acid samples (pH 7
or less), use pH 9.18 or pH 10.01 if you are going
to measure alkaline samples.

Two point calibration at pH 6.86 and pH 4.01
or pH 9.18 (NBS):

• Proceed as described in “One point calibra­tion at pH 6.86” but do not quit calibration by
pressing the CAL key at the end.

• After the first calibration point
is confirmed, immerse the pH
electrode and the temperature
probe into the second buffer

HI 7004

solution (pH 4.01 or pH 9.18)
and shake briefly.

Note: the electrode should
be submerged approxi­mately 4 cm (1½") into the
solution. The temperature

(1½
")

probe should be located as
close as possible to the pH electrode.

• Select the second buffer
value on the secondary
display by pressing the

°C

°C

ºC

or °C key.

• When the “READY” and
“CON” symbols blink on the
display the reading is stable

READY

CON

and the calibration can be
confirmed.

• Press the CFM key. If the

CFM

reading is not close to the
selected buffer solution,

“WRONG

BU

” and “WRONG ”

2

will blink alternatively. If
the reading is close to the
selected buffer, the slope and
the offset are calibrated.

WRONG

WRONG

BUF

2

4 cm

19

The values will be stored in memory and the
meter will return to the operating mode.

Two point calibration at pH 7.01 and pH 4.01
or pH 10.01 (STANDARD):

• Proceed as described in “One point calibra­tion at pH 7.01” but do not quit calibration by
pressing the CAL key at the end.

• After the first calibration point
is confirmed, immerse the pH
electrode and the temperature
probe into the second buffer
solution (pH 4.01 or pH 10.01)

HI 7004

and shake briefly.

Note: the electrode should
be submerged approximately
4 cm (1½") into the solution.
The temperature probe should
be located as close as pos-

(1½
")

sible to the pH electrode.

• Select the second buffer value
on the secondary display by

°C

ºC

pressing the °C or °C key.

• When the “READY” and “CON”
symbols blink on the display
the reading is stable and the

READY

CON

calibration can be confirmed.

• Press the CFM key. If the
reading is not close to the

CFM

selected buffer solution,

“WRONG

BUF

” and “WRONG ”

2

will blink alternatively. If the
reading is close to the se­lected buffer, the slope and
the offset are calibrated.

WRONG

WRONG

BUF

2

The values will be stored in memory and the
meter will return to the operating mode.

Note: the meter will automatically skip the

buffer that was used for the first cali­bration to avoid erroneous calibration.

4 cm

20

Note: during calibration, the

secondary LCD displays
the selected buffer value.
By pressing the RANGE key the tem­perature value can be also displayed.

CAL

BUF

pH

1

pH

RANGE

CAL

BUF

pH

°C

1

This will allow you to check the buffer
temperature during calibration.

21

PROCEDURE FOR HI 931410

HI 931410 provides three technical pre-pro­grammed calibration 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 26).

• Switch the instrument on after

connecting the pH electrode

ON

and the temperature probe.

ONE POINT CALIBRATION

• Immerse the pH electrode and

the temperature probe into a
pH 7.01 buffer solution.
Shake briefly and wait 1-2 min-

HI 7007

utes for thermal equilibrium.

Note: the electrode should be
submerged approximately
4 cm (1½") into the solution.
The temperature probe should
be located as close as pos-

(1½
")

sible to the pH electrode.

• Press the CAL key. The symbol "t1" will

appear on the display.

CAL

4 cm

• Press the CON key. The buffer value will be

displayed on the right LCD.

CON

pH

Note: the "pH" symbol will be flashing through-

out the calibration procedure.

22

• Allow 1-2 minutes for the pH reading to stabi-

lize.

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 26).

°C

pH

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 26 to manually correct for
temperature.

• Press the CON key again to ac-

cept the buffer value. The first

CON

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

pHpH

mVmV

meter is calibrated. This is known
as one point calibration.

For greatest accuracy, however, it is recom­mended that a two-point calibration is per­formed.

TWO POINT CALIBRATION

• Proceed as described in “One point calibration”

but do not quit calibration by pressing the
pH/mV key at the end.

• After the first calibration point

is confirmed, immerse the pH
electrode and the temperature
probe into the second buffer
solution (pH 4.01 or pH 10.01)

HI 7004

and shake briefly.

23

Note: the electrode should be
submerged approximately
4 cm (1½") into the solution.
The temperature probe should
be located as close as pos-

(1½
")

sible to the pH electrode.

• Rinse the electrode and the temperature probe

before immersing them into pH 4.01/ pH10.01
calibration buffer, shake briefly and wait for
thermal equilibrium.

• The meter automatically rec-

ognizes the buffer value and
prompts for the second at "t2"
(pH 4.01, acid) or "t3"
(pH 10.01, alkaline).

• Press the CON key to confirm the pH value

and 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", depending on the solution used.

4 cm

CON

°C

pH

If the temperature is at 20°C, the display will
show respectively "pH 4.00" or "pH 10.06"
(see page 26).

• Press CON key again to confirm calibration.

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

CON

°C

pH

24

• If the reading is drifting, turn the meter off and

repeat the calibration procedure waiting longer
time for the reading to stabilize. However,
usually 1 or 2 minutes are enough to prevent
drifting of the 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, re-calibration
might be required.

25

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.

During calibration the meter will automatically
calibrate to the pH value corresponding to the
measured or set temperature.

For manual temperature compensation please
refer to the following chart.

pH Buffers

°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
75
80
85
90
95

32
41
50
59
68
77
86

95
104
113
122
131
140
149
158
167
176
185
194
203

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

4.14

4.16

4.17

4.19

4.20

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

6.86

6.86

6.87

6.88

6.89

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

6.99

7.01

7.02

7.03

7.04

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

8.91

8.89

8.87

8.85

8.83

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

9.74

9.73

9.74

9.75

9.76

For instance, if the buffer temperature is at
25°C, the display will show pH 4.01 or 7.01 or

10.01.

If the buffer temperature is at 20°C, the display
will show pH 4.00/7.03/10.06.

If the buffer temperature is at 50°C, the display
will show pH 4.06/6.98/9.82.

26

TEMPERATURE AND mV CALIBRATION

All Hanna bench-top pH meters have been
factory calibrated for the temperature and mV
and is ready for measurements.

The temperature probes and ORP electrodes
are interchangeable and no temperature or
mV calibration is needed when the tempera­ture probe or the ORP electrode is replaced.

If, for any reason, the temperature or the mV
measurements are out of accuracy, the tem­perature or the mV re-calibration should be
carried out.

In any case, we recommend that you have
your bench-top meters re-calibrated in tem­perature and mV once a year.

In HI 931402 it is possible to calibrate the
meter for temperature and mV (see page 29),
however it is recommendable that these cali­brations are performed by technical personnel
only.

For an accurate recalibration, contact your
nearest Hanna Service Center.

27

INTERFACE WITH PC (HI931402 ONLY)

Data transmission from the instrument to the
PC is now much easier with the new HI 92000
Windows® compatible application software of­fered by Hanna Instruments.

User friendly, HI 92000 offers a variety of
features and has an on line help feature to
support you throughout all situations.

HI 92000 allows you to use the powerful means
of the most diffused spread sheet programs
(e.g. Excel©, Lotus 1-2-3©). Simply run your
favorite spread sheet and open the file down­loaded by HI 92000. It is then possible to
make any elaboration available with your soft­ware (e.g. graphics, statistical analysis).

To install HI 92000 you need a 3.5" drive and
few minutes to follow the instructions conve­niently printed on the disk's label.

In your copy of HI92000 you will also find a
set of configuration files for your Windows
Terminal® program to send commands di­rectly from the PC keyboard (see appendix
for commands description and usage).

Contact your Hanna Dealer to request a copy.

To connect your HI 931402 to the PC use
HI 920010, available through your Hanna
Dealer. Make sure that your meter is switched
off and plug the connectors, one into the
meter RS232C connector, the other into the
serial port of your PC.

Note: Cables different from the HI 920010 may

use a different configuration. In such
case any communication between the
meter and the PC is not possible.

Excel© Copyright of "Microsoft Co."
Lotus 1-2-3© Copyright of "Lotus Co."
Windows® and Windows Terminal® are registered Trademark of "Microsoft Co."

28

ADDITIONAL CALIBRATION PROCEDURES

& INFORMATION FOR HI931402 ONLY

(for technical personnel only)

For HI931402 only, you can perform the tem­perature and mV calibration as follows.

TEMPERATURE CALIBRATION OF HI931402

Initial Preparation

• Prepare a vessel containing ice and water
and another one containing hot water (at a
temperature of at least 50°C). Place insula­tion material around the container to mini­mize temperature changes.

• Use a ChecktempC or

C

°

C

°

a calibrated thermom­eter with a resolution
of 0.1 °C as a refer-

0 °C

(32 °F)

50 ºC

(122 ºF)

ence thermometer.

Procedure

• Switch the instrument on while pressing
the CAL key. The "CAL" indicator will be lit.
The secondary LCD section will show 0.0°C.

ON

CAL

+

CAL

°C

°

• Immerse the temperature probe

C

in the vessel with the ice and
water as near to the ChecktempC
as possible.

0 °C

(32 °F)

• Wait for temperature reading to stabilize.

• Use the °C and °C keys to
set the reading on the sec-

°C

ºC

ondary LCD section to the
noted temperature of the ice
with the water.

• Press CFM key. The secondary LCD sec­tion will show 50.0°C.

CFM

CAL

°C

29

°

• Immerse the temperature probe

C

in the vessel with hot water.

• When the temperature reading
has stabilized, use the °C and

°C

keys to set the reading on

the secondary LCD to the

°C

50 °C

(122 °F)

ºC

noted temperature of the hot
water.

• Press CFM key.
The primary LCD

CFM

CAL

section will show
"390.0 mV".

• Complete your temperature calibra-

CAL

tion by pressing the CAL key if
you do not want to perform the mV
calibration mode.

mV CALIBRATION OF HI 931402

Initial Preparation

• Prepare HI 931001 or a simulator that can

provide ±390.0 mV with accuracy of ±0.1mV
and ±1000 mV with accuracy of ±1 mV.

Procedure

• Continue from the tempera-

ture calibration, the primary

CAL

LCD section will show
"390.0 mV".

• Select 390.0 mV of the simulator.

• Wait for 3 sec., press the CFM

CFM

key. The primary LCD will display
the next reading to be selected on
the simulator.

• Repeat previous two steps for -390.0 mV,

1000 mV and -1000 mV.

• At the end of the mV calibration, the meter

will return to the pH measurement mode.

mV

mV

INTERFACE WITH PC

If you are not using Hanna Instruments
HI 92000 application software, please find here
below some additional information to help
your connection to the PC.

30

Setting the Baud Rate and the Command
Prefix

The transmission speed (baud rate) of your
HI 931402 and of the external device must be
the same. To set the baud rate of the meter
press the COMM
key, the primary

COMM

LCD shows the cur­rent baud rate.

The following baud rate can
be selected through the

°C

°C

ºC

and °C keys: 150, 300, 600,
1200 (factory setting) and 2400.

Press the CFM key to confirm the setting
and the primary LCD shows the current com-
mand prefix; 16 is the factory setting.

CFM

Note: the Command Prefix has not to be
changed using HI92000 Hanna Software.

Select a different command pre­fix (between 0 to 47 decimal)

°C

ºC

by pressing the °C and °C keys
.

Press the CFM key to confirm the

CFM

setting.

Sending Commands from PC

With terminal programs such as, for example,
Telix®, Windows Terminal®, it is possible to
remotely control your HI 931402. Use
HI 920010 cable to connect the meter to the
PC, start the terminal program and set the
communication options as follows: 8, N, 1,
no flow control.

Command Types

To send a command to the pH meter the
scheme is: <DLE> <command> <CR>

Windows Terminal® are registered Trademark of "Microsoft Co."
TELIX® is registered Trademark of "Deltacomm"

31

This line makes the computer send a Data
Link Escape character, the command ex­pressed as a number or a 3-character se­quence) and a CR character.

Note: Windows Terminal® and all the other
terminal programs that support the ANSI es­cape sequence, represent the DLE character
by the string '^P' and the CR character by the
string '^M'. E.g. the line '^PPHR^M' sets the
range to pH.

Commands not requiring an answer from
the pH meter:

PHR sets the range to pH
MVR sets the range to mV
CAL is equivalent to pressing the CAL key
CFM is equivalent to pressing the CFM key
UPC is equivalent to pressing the °C key
DWC is equivalent to pressing the °C key
MEM is equivalent to pressing the MEM key
MRR is equivalent to pressing the MR key
COM is equivalent to pressing the COMM key
OFF is equivalent to pressing the OFF key

Commands requiring an answer:

pH? Causes the meter to send the pH value. If

the reading is out of range "Err 1" is sent. If
the range is set to mV, "Err 6" is sent.

MV? Causes the meter to send the mV value. If

the reading is out of range "Err 2" is sent. If
the range is set to pH, "Err 6" is sent.

TM? Causes the meter to send the temperature

value. If the reading is out of range "Err 3" is
sent.

These commands may be sent with either
capital or small letters. Invalid commands will
be ignored. The characters sent by HI 931402
are always capital letters. When the meter
receives an unknown or corrupted commands,
it will send a character CAN (ASCII Code 24).

Windows Terminal® are registered Trademark of "Microsoft Co."

32

TROUBLESHOOTING FOR HI 931402

F

F

Symptoms Problem Solution

The meter does
not work with the
temperature probe
The meter fails to
calibrate or gives
faulty readings

The meter is slow
in responding or
gives faulty
readouts

The meter does
not accept the 2
buffer solution for
calibration

The reading drifts

Display shows:

Display shows:

Defective ATC
probe

Defective pH
electrode

The electrode is
not working or
the reference
junction is
clogged

Defective pH

nd

electrode

Defective pH
electrode

Out of range-pH
scale

pH

Out of range-°C
scale

pH

ºC

Replace the probe

Replace the electrode

Leave the electrode in
a storage solution after
cleaning the junction. If
problem persists,
replace the electrode

Follow the cleaning
procedure. If this
doesn't work replace
the electrode

Replace the electrode

a) Check the calibration
b) Assure the pH sample

is in the range 0 to 14

c) Check the level of

electrolyte and the
state of the electrode
itself

Make sure the °C is within
0-100° and temperature
probe is plugged

Display shows:

Display shows:

1

"WRONG

BU

and/or

"WRONG "

mV

"

Out of range-mV
scale

Erroneous
buffer solution
used for offset
cal.

Defective

Electrode not connected

Make sure the buffer
solution used is pH7 and
replace if necessary

Replace the electrode

electrode

Display shows:
"WRONG
and/or

BU

"

2

"WRONG "

Erroneous
buffer solution
used for slope
cal.
Defective
electrode

Use fresh buffer solution

Replace the electrode

33

TROUBLESHOOTING FOR HI 931410

Symptoms are:

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

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" on the
display

"Err3" on the
display

"Err2" on the
display

"Err4" on the
display

"Err5" 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 re-calibrate
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.

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.

34

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 DE-

POSITS ARE PRESENT.

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

During transport tiny bubbles of air may have
formed inside the glass bulb. The electrode
cannot function properly under these condi­tions. These bubbles can be removed by

35

"shaking down" the electrode as you would
do with a glass thermometer.

If the bulb and/or junction are dry, soak the
electrode in HI70300 or HI 80300 Storage So­lution for at least one hour.

For refillable electrodes:

If the filling solution (electrolyte) is more than
1 cm (½") below the fill hole, add HI 7082 or
HI 8082 3,5M KCl Electrolyte Solution for
double junction or HI 7071 or HI8071 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 (4 cm /1½") in the sample and

stir gently for at least 30 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 assuring 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 junc-

tion or HI 7082 or HI8082 for double junction
electrodes). Follow the Preparation Proce­dure above before taking measurements.

Note: NEVER STORE THE ELECTRODE IN

DISTILLED WATER OR DRY.

36

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 (HI7071 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.

CLEANING PROCEDURE

General Soak in Hanna HI 7061 or HI8061

General Cleaning Solution for

approximately 1 hour.

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

- Protein Soak in Hanna HI7073 or HI8073

Protein Cleaning Solution for
15 minutes.

- Inorganic Soak in Hanna HI 7074 or HI 8074

Inorganic Cleaning 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.

37

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 HI7071 or HI 8071 for single
junction or HI7082 or HI 8082 for double
junction electrodes.

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

least 1 hour.

• Drifting: Soak the electrode tip in warm
Hanna Solution HI 7082 or HI 8082 for one
hour and rinse tip with distilled water.
Refill with fresh HI 7071 or HI8071 for single
junction electrodes and HI 7082 or HI8082
for double junction electrodes.

• 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 Hanna Solution HI 7061 or HI8061
for 30 minutes, rinse thoroughly in dis­tilled water and then follow the Cleaning
Procedure above.

38

Temperature-Resistance Correlation

20

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

C

for HANNA pH sensitive glass

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

9

2x10

-10

9

1x10

-10

8

-10

2x10

8

1x10

-10

7

2x10

-10

-10

7

1x10

-10

-20-

°

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 environ-

ments, 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.

39

Typical Electrode Life
Ambient Temperature 1- 3 years
90 °C Less than 4 months
120°C Less than 1 month

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

40

ACCESSORIES

pH CALIBRATION SOLUTIONS:

HI77400P pH 4.01 & 7.01 Buffer Solution,

20 mL sachet, 5 pcs each

HI 7004M pH 4.01 Buffer Solution, 230 mL
HI 7004L pH 4.01 Buffer Solution, 460 mL
HI 7006M pH 6.86 Buffer Solution, 230 mL
HI 7006L pH 6.86 Buffer Solution, 460 mL
HI77700P pH 7.01 Buffer Sol. 10x20 mL
HI 7007M pH 7.01 Buffer Solution, 230 mL
HI 7007L pH 7.01 Buffer Solution, 460 mL
HI 7009M pH 9.18 Buffer Solution, 230 mL
HI 7009L pH 9.18 Buffer Solution, 460 mL
HI770710P pH 7.01 & 10.01 Buffer Solution,

20 mL sachet, 5 pcs each

HI 7010M pH 10.01 Buffer Solution, 230 mL
HI 7010L pH 10.01 Buffer Sol., 460 mL

pH CALIBRATION SOLUTIONS IN FDA
APPROVED BOTTLE:

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 SOLUTIONS:

HI 70300M Storage Solution, 230 mL
HI 70300L Storage Solution, 460 mL

ELECTRODE STORAGE SOLUTIONS IN
FDA APPROVED BOTTLE:

HI 80300M Storage Solution, 230 mL
HI 80300L Storage Solution, 460 mL

ELECTRODE CLEANING SOLUTIONS:

HI 7061M General Cleaning Sol., 230 mL
HI 7061L General Cleaning Sol., 460 mL
HI 7073M Protein Cleaning Sol., 230 mL

41

HI 7073L Protein Cleaning Sol., 460 mL
HI 7074M Inorganic Cleaning Sol., 230 mL
HI 7074L Inorganic Cleaning Sol., 460 mL
HI 7077M Oil & Fat Cleaning Sol., 230 mL
HI 7077L Oil & Fat Cleaning Sol., 460 mL

ELECTRODE CLEANING SOLUTIONS IN
FDA APPROVED BOTTLE:

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

REFILLING ELECTROLYTE SOLUTIONS:

HI 7071 3.5M KCl + AgCl Electrolyte,

4x50 mL, for single junction elec­trodes

HI 7072 1M KNO3 Electrolyte, 4x50 mL
HI 7082 3.5M KCl Electrolyte, 4x50 mL,

for double junction electrodes

REFILLING ELECTROLYTE SOLUTIONS IN
FDA APPROVED BOTTLE:

HI 8071 3.5M KCl + AgCl Electrolyte,

4x50 mL, 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 7091M Reducing Pretreatment Solution,

230 mL

HI 7091L Reducing Pretreatment Solution,

460 mL

HI 7092M Oxidizing Pretreatment Solution,

230 mL

HI 7092L Oxidizing Pretreatment Solution,

460 mL

42

pH & ORP ELECTRODES:

B = BNC CONNECTION PLUG + 1 m (3.3’) CABLE

S = SCREW-TYPE CONNECTOR

HI 1043B / HI1040S

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 / HI1050S

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

12 mm

0.5"

HI 1053

"S" VERSION

120 mm

4.7"

HI 1083B

Glass-body, micro, Viscolene, nonrefillable,
combination pH electrode. 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 / HI1111S

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

12 mm

0.5"

HI 1131

"S" VERSION

43

9.5mm DIA

120 mm

4.7"

0.37"

HI1330B / HI 1310S

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

HI 1330

"S" VERSION

120 mm

4.7"

5mm DIA

0.2"

5mm

0.2"

HI1331B / HI 1311S

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"

HI1230B / HI 1210S

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

12 mm

0.5"

HI 1230

120 mm

"

"

4.7"

HI2031B / HI 2020S

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

6 mm

0.25"

HI 2031

75 mm

"

"

2.95"

HI1332B / HI 1312S

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

12 mm

0.5"

HI 1332

44

120 mm

4.7"

"S" VERSION

Ultem® is registered Trademark of "General Electrics Co."

FC100B

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"

FC200B / FC200S
Plastic-body (Kynar®), single junction, conic,
Viscolene, refillable, combination pH electrode.
Use: meat & cheese.

6 mm

0.25"

FC 200

75 mm

2.95"

FC210B

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

12 mm

0.5"

FC 210

120 mm

4.7"

FC220B

Glass-body, single junction, refillable, combi­nation pH electrode. Use: food & wine process-
ing.

9.5mm DIA

FC 220

120 mm

4.7"

Kynar® is registered Trademark of "Pennwalt Corp."

45

0.37"

12 mm

0.5"

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 / HI1410S

Glass-body, single junction, flat tip, Viscolene,
combination pH electrode. Use: surface mea-
surement.

12 mm

0.5"

HI 1413

110 mm

4.3"

Half-cell electrodes:

HI 2110B

Glass-body, single half-cell pH electrode.
Use: general purpose.

9.5mm DIA

0.37"

12 mm

0.5"

HI 2110

120 mm

"

HI 5311

Glass-body, Ag/AgCl reference half-cell elec­trode, double junction, refillable with 4mm plug
with 1m (3.3') cable. Use: general purpose with
wide temperature range.

12 mm

0.5"

HI 5311

120 mm

4.7"

Kynar® is registered Trademark of "Pennwalt Corp."

46

HI 5412
Glass-body, single Calomel reference half­cell electrode, refillable with 4mm plug with 1m

(3.3') cable. Use: general purpose with constant
temperature range.

12 mm

0.5"

HI 5412

120 mm

4.7"

ORP electrodes:

HI3131B / HI 3111S

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

12 mm

0.5"

HI 3131

150 mm

"S" VERSION

5.9"

HI3230B / HI 3210S

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

12 mm

0.5"

HI 3230

120 mm

"S" VERSION

4.7"

HI4430B / HI 4410S

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

12 mm

0.5"

HI 4430

120 mm

"S" VERSION

Ultem® is registered Trademark of "General Electrics Co."

4.7"

47

EXTENSION CABLES FOR SCREW-TYPE
ELECTRODES ONLY (SCREW TO BNC
CONNECTOR):

HI 7855 SERIES CABLE CONNECTORS

CONNECTOR AND 3.0 mm (0.12") CABLE WITH BNC

CONNECT TO
SCREW TYPE

ELECTRODES

CONNECT TO THE

BNC SOCKET

OF THE METER

HI7855/1 Extension cable 1m (3.3') long

HI7855/3 Extension cable 3m (9.9') long

HI7855/5 Extension cable 5m (16.5') long

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

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

POWER UNITS:

HI 710005 Voltage adapter from 110 VAC

to 12 VDC

HI 710006 Voltage adapter from 220 VAC

to 12 VDC

48

OTHER ACCESSORIES:

ChecktempC Pocket-size thermometer with

penetration probe and 0.1°C
resolution (range -50.0 to

150.0°C)

HI 76405 Electrode holder

HI 7669/2W Temperature probe with 1 m

(3.3') screened cable

HI 8427 pH and ORP electrode simula-

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

HI 92000 Windows® compatible applica-

tion software

HI 920010 PC connection cable

HI 931001 pH and ORP electrode simula-

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

Windows® is registered Trademark of "Microsoft Co."

49

ELECTRODE APPLICATION

REFERENCE GUIDE

Application Electrodes

1. Aquarium HI 1332B, HI1911B, HI 1312S

2. Bath-water HI 1910B, HI 1130B, HI 1110S

3. Beer HI 1131B, HI 1111S

4. Bread HI2031B, FC 200B, HI 2020S, FC 200S

5. Cheese FC 200B, FC 200S

6. Dairy products FC 911B, FC 100B

7. Dirty water HI 1910B, HI 1912B

8.Emulsions HI1053B, HI 1050S

9. Environment HI1230B, HI 1210S

10.Flasks HI1331B, HI1310S

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

12. Fruit FC 200B, FC220B, FC 200S

13. Fruit juices, organic FC 210B

14. Galvanizing waste solution HI 1130B, HI 1912B, HI 1110S

15. Heavy-duty applications HI 1135B, HI 1115S

16. High purity water HI1053B, HI 1050S

17. Horticulture HI 1053B, FC 200B, HI1050S, FC 200S

18. In-line applications HI1134B, HI 1135B, HI2114B, HI 2910B,

19. Laboratory general use HI 1131B, HI 1230B, HI 1332B, HI1330B

20. Leather HI1413B, HI 1410S

21. Lemon juice FC 100B

22. M eat FC200B, HI 2031B, FC 200S, HI2020S

23. Micro plate sampling of less than HI 1083B, HI 1080S
100 mL

24. Milk and Yogurt FC 210B

25.Paints HI1053B, HI 1050S

26. Paper HI1413B, HI 1410S

27. Photographic chemicals HI 1230B, HI 1210S

28. Quality control HI 1332B, HI 1312S

29.Sausages FC200B, HI 2031B, FC 200S, HI 2020S

30. Semi-solid products HI 2031B, HI 2020S

31.Skin HI1413B, HI 1410S

32. Soil samples HI1230B, HI 1210S

33.Solvents HI1043B, HI 1040S

34. Strong acid HI 1043B, HI 1040S

35. Submersion application HI 1130B, HI 1110S

36. Surface measurements HI 1413B, HI 1410S

37. Swimming pool H 1130B, HI 2114B, HI 2910B

38. Titrations with constant temperature H I 1131B, HI 1111S
range

39. Titrations with wide temperature HI 1131B, H I 1111S
range

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

41. Vials and test tube H I 1330B, HI 1310S

42. Wine processing FC 220B

HI 1114S, HI1115S

HI1111S, H I 1210S, HI 1312S, HI1310S

B = BNC connection plug
S = Screw-type connection plug

50

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 the in­structions.

The electrodes and probes are warranted
for a period of six months.

Damages due to accidents, 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. If the repair is not covered by the war­ranty, you will be notified of the charge for repair
or replacement. If the instrument is to be re­turned to Hanna Instruments, obtain a Return
Goods Authorization No. (RGA) from the Cus­tomer Service Department first and than send it
with shipment cost 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 reserves the right to modify
the design, construction and appearance of its
products without advance notice.

51

CE DECLARATION OF CONFORMITYCE DECLARATION OF CONFORMITY

CE DECLARATION OF CONFORMITY

CE DECLARATION OF CONFORMITYCE 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

HI 931402 HI 931410

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

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

Date of Issue: 01-02-1996

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 equipments, 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 operation, ESD wrist straps should be worn to avoid possible damage to the
electrode by electrostatic discharges.

Any variation introduced by the user to the supplied equipment may degrade the instrument's
EMC performance.

To avoid electrical shock, do not use these instruments when voltages at the measurement
surface exceed 24VAC or 60VDC.

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

53

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ITALY

MANPHBN3R2

03/96