Hanna Instruments HI 931300 User Manual

Instruction Manual

HI931300
HI931301

Portable Microprocessor

Logging pH Meters with

Last Calibration Data

Storage

RANGE

pH0.00....14.00

ºC0.00...+100.0

These Instruments are in Compliance with the CE Directives

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 more precise idea
of its versatility in a wide range of applications.

These instruments are in compliance with the

directives EN 50081-1 and EN 50082-1.

TABLE OF CONTENTS

Preliminary Examination............................. 1

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

LCD Display Functional Description ........... 2

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

Specifications ............................................. 4

Operational Guide....................................... 5

pH Calibration Procedure.......................... 14

pH Values at Various Temperature .......... 19

Temperature Calibration ............................ 20

Logging Function (HI931300 only) ............ 23

Data Transfer to PC.................................. 25

Fault Functions ........................................ 26

Memory Organization ............................... 27

Electrode Conditioning and Maintenance . 28

Battery Replacement ................................ 32

Temperature-Resistance Correlation for

HANNA pH sensitive glass....................... 33

Accessories.............................................. 35

Electrode Application Reference Guide .... 43

Warranty ................................................... 44

CE Declaration of Conformity ................... 45

ISO 9000 Certified
Company since 1992

PRELIMINARY EXAMINATION

Remove the instrument from the packing ma­terial and examine it carefully to make sure
that no damage has occurred during ship­ment. If noticeable damage is found, notify
your Dealer.

Each pH meter is supplied complete with:

• HI1230B Combination pH Electrode

• HI7669/2W Temperature Probe

• 1.5V AA size Alkaline Batteries (4 pcs)

• Rugged Carrying Case.

Note: Save all packing material until you are

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

GENERAL DESCRIPTION

Microprocessor-based, HI931300 and
HI931301 are the first GLP portable pH meters

and memorize the last calibration data: date
and time, offset and 2 slope values.

This exclusive feature allows the operator to
check the status of the meter at any time by
simply pressing one button.

All pH measurements are automatically com­pensated for temperature (ATC) when used
with the supplied temperature probe.

HI931300 can also memorize pH and tem­perature measurements at a user-selectable
intervals (from 1 to 180 minutes).

It is possible to connect the HI931300 to a
PC with the aid of an infrared transmitter,

1

HI9200, and a Windows® compatible soft-
ware, HI92000. Data can be downloaded in
seconds through the infrared diode for stor­age, graphing, and other functions.

The instrument housing is made of rugged,
lightweight material, weighing under 500 g
(17 oz.).

Other features include automatic calibration
(1, 2 or 3 point), 3 memorized buffers (pH 4.01,

7.01, 10.01), auto shut-off, low battery detec­tion and 12VDC socket for power supply (op­tional, see page 41 for details).

LCD DISPLAY FUNCTIONAL DESCRIPTION

1

pH

2

LOG

1. Primary Display (pH or temperature mea­surements are displayed with one or two
decimal digits)

2. Secondary Display (temperature measure­ment is displayed without decimal digit).

Windows® is a registered Trademark of "Microsoft Co."

2

FUNCTIONAL DESCRIPTION

11

22

33

LOG

4

HI 931300

MICROPROCESSORLOGGING

55

pHMETER

66

ON/OFF ON/OFF

77

RANGE RANGE

RANGE

pH0.00....14.00

ºC0.00...+100.0

LOG

ALT ALT

CAL CAL

CFM CFM

FACTOR FACTOR

TIME TIME

12 12

pH pH

HI 931301

11 11

10 10

99

88

MICROPROCESSORpH METER

RANGE

pH0.00....14.00

ºC0.00...+100.0

1. Electrode Connector (BNC)

2. Temperature Probe Connector

3. Liquid Crystal Display

4. LOG key, to enter the logging mode

(HI931300 only)

5. ON/OFF key, to turn the meter on or off

6. ALT, alternate function key

7. RANGE key, to select the pH or the °C

measurement mode

8. FACTOR key, to display calibration data

9. TIME key, to display time for HI931301

and to display time and logging interval
for HI931300

10. CFM key, to confirm the calibration

reading and DOWN arrow key to scroll
down

11. CAL key, to enter or exit calibration

mode and UP arrow key to scroll up

12. Socket for External Power Supply

3

SPECIFICATIONS

HI931300 HI 931301

Range pH 0.00 to 14.00 pH

Resolution pH 0.01 pH

Accuracy pH +0.01 pH
(@20°C/68°F) °C +0.5°C

Typical EMC pH +0.02 pH
Deviation °C +0.5°C

Calibration Automatic 1, 2 or 3 points

Offset Calibration +1 pH
Slope Calibration from 70 to 108%
Temperature Automatic from 0 to 100°C

Compensation (32 to 212°F) or fixed

Electrode HI1230B combination pH

Temp. Probe HI7669/2W with 1 m

Input Impedance 1012 Ohm
Power Supply 4x1.5V AA size batteries

Logging Interval 1, 2, 5, 10, Not

Operating from 0 to 50°C
Conditions (32 to 122°F)

Dimensions 220 x 82 x 66 mm

Weight 500 g (18 oz.) meter alone

°C 0.0 to 100.0°C

°C 0.1°C

with pH 4, 7 and 10

buffers memorized

at 25°C (77°F)

gel electrode (included)

(3.3') cable (included)

200 hours of con-

tinuous use; power

socket for 12VDC adapter

15, 20, 30, Available

60, 120, 180

minutes

95% RH max

(8.7 x 3.2 x 2.6")

Kit: 1.4 Kg (3.1 lb.)

4

OPERATIONAL GUIDE

INITIAL PREPARATION

Each meter is supplied

-

1.5V

complete with batteries.
Remove the back cover, un-

wrap the batteries and in-

+

-

1.5V

+

-

1.5V

1.5V

+

SCREW

+

POTS

-

RESET

stall them while paying at­tention to the polarity.

PROBES CONNECTION

To prepare the
instrument for
use, connect the

HI 7669/2W

TEMPERATURE

PROBE

COMBINATION
pH ELECTRODE
WITH BNC CONNECTOR

pH electrode to
the BNC connec­tor located on the
top of the instru­ment.

Connect the temperature probe to the appro­priate connector.

The temperature probe can be used indepen­dently to take temperature measurements, or
it can be used in conjunction with the pH
electrode to utilize the meter's ATC capabil­ity.

If the temperature probe is
left disconnected, the meter

pH

defaults to a temperature of
"25°C" (77°F).

To switch the meter on, press
the ON/OFF key.

ON/OFF

To maximize battery life, the display is auto­matically switched off after 5 minutes (for
HI 931300) or 10 minutes (for HI931301) of

5

non-use. However, HI931300 will continue to

or

or

log, if in the logging mode, pH and tempera­ture.

To revive the display, press
the ON/OFF key.

ON/OFF

Before proceeding with pH measurements fol­low the calibration procedure (see page 14).

SETTING DATE/TIME/LOGGING INTERVAL

Press the ALT and the TIME keys simulta­neously. The display will show the date set­ting. The year will be blinking.

ALT

RANGE

CAL

TIME

DATE

Use the UP or the DOWN arrow keys to
select the year.

CAL CFM

When the correct year is selected, press the
TIME key once. The month will start blinking.

DATE

TIME

Select the month by using the UP or the
DOWN arrow keys.

CAL CFM

6

Press the TIME key. The day will start blink-

or

or

ing.

DATE

TIME

Use the UP or the DOWN arrow key to
select the correct day.

CAL CFM

Press the ALT and the TIME keys simulta­neously. The display will now show the time
with the logging interval blinking (for HI931300
only).

ALT

RANGE

CAL

TIME

TIME

INTV

The interval can be selected from 1, 2, 5, 10,
15, 30, 60, 120 or 180 minutes by using the
UP and the DOWN arrow keys.

Note: the default logging interval is set at 1

minute.

CAL CFM

When the desired logging interval is selected
press the TIME key. The hour will start blink­ing.

TIME

INTV

TIME

7

To select the hour, press the UP or the

or

or

DOWN arrow keys (24 hour clock).

CAL

CFM

To set the hour press the TIME key once.
The minutes will be blinking.

TIME

INTV

TIME

Use the UP or the DOWN keys to select the
minutes.

CAL CFM

Press the ALT and the TIME keys simulta­neously to leave this mode.

ALT

CAL

RANGE

TIME

The time, date and printing interval are now
set and stored in the memory. The memory
is retained even when the meter is switched
off.

8

TO VIEW THE DATE/TIME/LOGGING IN­TERVAL/pH/TEMPERATURE

To view the time press the TIME key. In
HI931300 this also displays the selected log­ging interval.

HI931300

TIME

INTV

TIME

TIME

HI931301

To view the date, press the UP arrow key
when the LCD is displaying time.

DATE

CAL

To view pH and temperature press the RANGE
key (temperature will be displayed on the
secondary display without decimal digit).

pH

RANGE

To view the temperature only (on the primary
display and with decimal digit) press the
RANGE key.

°C

RANGE

If “25.0” appears to­gether with the blinking

°C

“°C” symbol, it indicates
that the temperature
probe is not connected.

9

TO VIEW THE pH CALIBRATION DATA

Press the FACTOR key and the meter will
display the last calibration date, in the fol­lowing sequence:

- month, day and year

DATE

FACTOR

Press the FACTOR key again and the meter
will display the last calibration time as

- hour and minutes.

TIME

FACTOR

Press the FACTOR key again, the display
will show the offset calibration factor as:

- pH offset value

- pH 7 buffer

pH

FACTOR

The pH offset value should be between
±0.50 pH.

For values higher than +0.50 or lower than

-0.50 pH the electrode is no longer reliable

and should be replaced.

10

Press the FACTOR key again, the display
will show the first slope calibration factor as:

- pH % slope 1st value

- pH 4 buffer

%

FACTOR

Press the FACTOR key again to display the
second slope calibration factor as:

- pH slope 2nd value

- pH 10 buffer.

%

FACTOR

The slope characteristic of the pH electrode
is directly displayed in percentage of the
theoretical value of 58.17mV per pH unit at
20°C.

Press the FACTOR key again to return to
normal operation.

pH

FACTOR

TAKING pH MEASUREMENTS

Press the RANGE key to get into the pH
mode. The temperature value will be displayed
on the secondary display.

pH

RANGE

11

Make sure that the pH electrode and the
temperature probe are securely connected to
the meter. If possible, use plastic beakers to
minimize any EMC interferences.

To take pH measurements,
simply submerge the bottom
4 cm (1½") of the electrode
and the temperature probe in
the solution to be tested, stir

4 cm

(1½")

gently and allow a few sec­onds for the electrode to adjust and stabilize.

For greatest accuracy, it is recommended to
calibrate the meter regularly (see page 14).

The pH reading of any sample is directly
effected by temperature. In order for the meter
to measure the pH accurately, it must know
the temperature.

To use the meter's Automatic Temperature
Compensation capability, submerge the tem­perature probe in the sample as close to the
electrode as possible.

If the temperature probe is

pH

disconnected, the meter as­sumes that the temperature
of the solution is 25°C (default temperature).

Press the RANGE key to show the tempera­ture reading. If the temperature probe is dis­connected the "°C" symbol will be blinking.

°C

RANGE

If measurements are taken successively in
different samples, it is recommended to rinse
the electrode thoroughly with deionized or tap
water first and then with some of the sample
to be tested. This procedure will minimize
contamination between the samples, result­ing in more accurate results.

12

TAKING TEMPERATURE MEASURE­MENTS

The HI7669/2W temperature probe that is
supplied with HI931300 and HI931301 is a
liquid/general purpose probe.

Taking a temperature measurement with
HI931300 and HI931301 is very easy.

Press the RANGE key to get into the tem­perature mode. The temperature value and
the "°C" symbol will be displayed on the
primary display.

°C

RANGE

Make sure the probe is prop­erly connected to the meter,
and take the measurement (al­low 1 or 2 minutes for the
temperature to stabilize).

If the temperature probe is
disconnected, the meter as­sumes that the temperature

°C

of the solution is "25.0 °C"
(default temperature) and the
"°C" symbol blinks.

Note: When taking pH mea-

surements, in order to
have the best accuracy
and proper temperature
compensation, im­merse the temperature
probe as close as pos­sible to the pH elec­trode.

13

4 cm

(1½")

pH CALIBRATION PROCEDURE

For greatest accuracy, it is recommended
that the instrument is calibrated frequently.

For a faster operation, it is possible to stan­dardize the electrode at pH 7.01 only (one
point calibration), but it is always good prac­tice to calibrate at least 2 points.

The standard calibration program of the meter,
however, is prepared for 3 (maximum) buffers.

Due to electrode conditioning time the elec­trode must be kept immersed in the sample
for a few seconds to stabilize. The meters
are equipped with a stability indicator and the
user will be guided step by step with easy
indications on the display during the pH cali­bration. This will make the calibration a simple
and error-free procedure.

4

0

INITIAL PREPARATION

0

I 7

H

Pour small quantities of
pH 7.01 (HI7007/HI8007) and

HI 7004 HI 7007

pH 4.01 (HI7004/HI8004) and/
or pH 10.01 (HI7010/HI8010) solution into in-
dividual beakers. If possible, use plastic bea­kers to minimize any EMC interferences.

For accurate calibra-

RINSE

CALIBRATION

tion use two beakers
for each buffer solu-

HI 7007

HI 7007

tion, the first one for
rinsing the electrode,
the second one for calibration. By doing this,
contamination between the buffers is mini­mized.

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 or perform a 3-point cali­bration for the entire range.

14

PROCEDURE

• Press the RANGE key to select the pH
measurement mode.

pH

RANGE

• Rinse the pH electrode with
some pH 7.01 (HI7007/
HI8007) solution or tap wa­ter. Dip the bottom 4 cm
(1½") of the electrode and
the temperature probe into

(1½
")

HI 7007

a beaker containing pH7.01
solution.

•Press the CAL key. The secondary (lower)
LCD will blink “7” to indicate that pH 7.01
is expected and the electrode is getting
conditioned.

CAL

4 cm

• When the “7” stops blinking, the calibration
can be confirmed. Press the CFM key to
confirm the first buffer.

CFM

• If everything is satisfactory
the secondary LCD will blink
“10” expecting the second
buffer at pH 10.01.

•If the buffer is out of the offset range, "E1"
as error message will appear on the sec­ondary display. Press the CAL key and

15

recalibrate the value.

CAL

Note: If a single point cali-

bration is required,
press CAL to leave
the calibration mode
now. However, it is

CAL

always better to proceed as follows
for a two-point calibration.

• “10” can be changed to “4” (indicating
pH 4.01) by immersing the electrode and
the temperature probe into the pH 4.01
buffer. If you are measuring acid samples
(pH 7 or less) use the pH 4.01 buffer
(HI7004/HI8004). For alkaline samples (pH 7
or more) use pH 10.01 (HI7010/HI8010).

(1½

4 cm

")

HI 7010

• Rinse the electrode with some pH 10.01
(HI7010/HI8010) or pH 4.01 (HI7004/HI8004)
solution. Dip the bottom 4 cm (1½") of the
electrode and the temperature probe into a
beaker containing the second buffer.

(1½

4 cm

")

HI 7010

• When “10” (or “4”) stops blinking, indicat­ing that the electrode has stabilized, wait
30 seconds and then press CFM again to

16

confirm the second calibration point.

CFM

•If the buffer is out of the slope range, "E2"
as error message will appear on the sec­ondary display. Press the CAL key and
recalibrate the value.

CAL

•If everything is satisfactory
the secondary LCD will blink
"4" (if previously was "10")
or "10" (if previously was
"4") expecting the third
buffer (HI7004/HI8004 or

HI7010/HI8010).
Note: if a two-point calibra-

tion is required, press
the CAL key to leave
the calibration mode

CAL

now.

•Rinse the electrode with some pH 4.01 (or
pH10.01) solution. Dip the bottom 4 cm
(1½") of the electrode in a beaker contain­ing the third buffer.

(1½

4 cm

")

HI 7004

• When "4" (or " 10") stops blinking, indicat­ing that the electrode has stabilized, press
the CFM key again to confirm the third

17

calibration point.

CFM

•If the buffer is out of the slope range, "E2"
as error message will appear on the sec­ondary display. Press the CAL key and
recalibrate the value.

CAL

•If you cannot complete the calibration,
check your electrode by following the con­ditioning and maintenance procedure on
page 28 and repeat the calibration proce­dure from the beginning with fresh buffers.
The pH electrode might have to be replaced
if calibration cannot be successfully per­formed.

During calibration, the characteristics of the
electrode will be memorized.

After calibration this data can
be checked by pressing the
FACTOR key (see operational
guide on page 10).

FACTOR

This operation will display:

• date

DATE

• time

• the offset characteristic of
the electrode in pH units

• the slope 1st in %

•the slope 2nd in %.

18

TIME

pH

%

%

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 temperature if used in conjunction
with the HI7669/2W temperature probe or to
25°C / 77°F if used without temperature probe.

TEMP pH VALUES

°C °F 4.01 6.86 7.01 9.18 10.01

0

32

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

4.01

5

41

4.00

50

4.00

59

4.00

68

4.00

77

4.01

86

4.02

95

4.03

104

4.04

113

4.05

122

4.06

131

4.07

140

4.09

149

4.11

158

4.12

6.98

6.95

6.92

6.90

6.88

6.86

6.85

6.84

6.84

6.83

6.83

6.84

6.84

6.85

6.85

7.13

7.10

7.07

7.04

7.03

7.01

7.00

6.99

6.98

6.98

6.98

6.98

6.98

6.99

6.99

9.46

9.39

9.33

9.27

9.22

9.18

9.14

9.10

9.07

9.04

9.01

8.99

8.97

8.95

8.93

10.32

10.24

10.18

10.12

10.06

10.01

9.96

9.92

9.88

9.85

9.82

9.79

9.77

9.76

9.75

For instance, if the buffer's temperature is
25°C, the display will show pH 4.01 or 7.01
or 10.01.

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

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

19

TEMPERATURE CALIBRATION

0 °C

(32 °F)

°
C

(for Technical Personnel only)

You can perform the temperature calibration
as follows.

INITIAL PREPARATION

°C

• Prepare a vessel containing
ice and water and another

(122 ºF)

50 ºC

one containing hot water (at
a temperature of 50°C/122°F). Place insu­lation material around the container to mini­mize temperature changes.

• Use a ChecktempC or a calibrated ther­mometer with a resolution of 0.1°C as a
reference thermometer.

PROCEDURE

•Turn the meter ON and
press the RANGE key twice
to get just the temperature
reading on the display.

°C

RANGE

• Immerse the temperature probe

ON/OFF

°C

in the container of ice and wa­ter. Place the probe as close
as possible to the reference ther-

0 °C

(32 °F)

mometer.

•Press the CAL key. The secondary display
(lower) LCD will blink "0" for approximately
30 seconds.

CAL

20

• When "0" stops blinking, the calibration
can be confirmed. Press the CFM key to
confirm the first temperature value.

CFM

•If the value is out of the offset range, "E1"
as error message will show on the second­ary display. Press the CAL key to re-cali­brate the value.

CAL

• If everything is satisfactory
the secondary LCD will
blink "50" expecting the
second temperature mea­surement.

Note: If a single point cali-

bration is required,
press the CAL key
to leave the tempera-

CAL

ture calibration mode
now. However, it is
always better to pro­ceed as follows for a
two-point calibration.

• Immerse the temperature probe
in the container at 50°C

°C

(122°F). Place the probe as
close as possible to the refer­ence thermometer.

50 °C

(122 °F)

• When "50" stops blinking, indicating that
the probe has stabilized, press the CFM

21

key again to confirm the second calibration
point.

CFM

•If the input is out of the slope range, "E2"
as error message will appear on the sec­ondary display. Press the CAL key to re­calibrate the value.

CAL

If everything is satisfactory the temperature
calibration is complete and the meter will
resume the normal operational mode.

22

LOGGING FUNCTION (HI931300 only)

LOGGING MODE

In this mode data will be stored directly into
memory for later retrival.

Set the appropriate logging interval (see Op­erational Guide section on page 6).

Press the ALT and the LOG keys simulta­neously to enter the logging mode. The log
number and page number will appear for a
few seconds on the display to indicate the
correct operational mode.

ON/OFF

ALT

LOG

CAL

When the meter is in log­ging mode, "LOG" is dis­played on the bottom left

LOG

TIME

INTV

corner of the LCD with the time on the pri­mary display and the logging interval on the
secondary one.

During logging, press the LOG key to show
the total number of data that has been logged
(sample number).

LOG

To view measurements during logging press
the RANGE key and the display will show
the temperature.

°C

RANGE

23

To view the pH values press the RANGE key
again.

pH

RANGE

To return to the logging information press the
LOG key.

LOG

After approximately 5 minutes the display will
switch off but the logging function remains
active.

To reactivate the display press
the ON/OFF key.

ON/OFF

Note: Once in the logging

mode, the interval can­not be changed. Exit

ON/OFF

LOG

the logging mode first
(pressing the ALT and

ALT

CAL

the LOG keys) before
setting the new interval.

TO STOP LOGGING

To stop logging, press the ALT and LOG
keys simultaneously.

The display will show the lot and page num­ber again for a few seconds.

ON/OFF

ALT

LOG

CAL

The running lot number can be reset by sim­ply removing and replacing the batteries.

24

DATA TRANSFER TO PC

HI931300 contains infrared emitting circuitry.

Set the meter to the TIME
mode and simply place your
data-logger on a HI9200 Infra­red Transmitter (ensuring that
the two infrared LEDs are

TIME

placed on top of each other)
and the memory can then be
downloaded to your PC
through the HI9200's RS232
port.

During the data transfer the
instrument displays the mes­sage "r 232".

Using the HI9200 Infrared Transmitter, all re­corded data can be fed to your Personal
Computer for easy reproduction, storage or
elaboration without the interference of cables
or cords between the meter and the transmit­ter.

Data transmission from the instrument to the
PC is now much easier with new HI92000
Windows® compatible application software of­fered by Hanna Instruments.

Windows® is registered Trademark of "Microsoft Co."

25

HI92000 allows you to use the powerful means
of most spread sheet programs (e.g. Excel©,
Lotus 1-2-3©). Simply open the file down­loaded by HI92000 and it is possible to make
any elaboration available with your software
(e.g. graphics, statistic analysis).

User friendly, HI92000 offers a variety of fea-
tures and has an on line help to support you
throughout any situation.

To install HI92000 you need a 3.5" drive and
a few minutes to follow the instructions con­veniently printed on the disk label.

FAULT FUNCTIONS

Erroneous solution used for
the offset calibration

For pH calibration:
Make sure the buffer solu­tion used is pH 7 and re­place if necessary

For temperature calibration:
Make sure the water is at
0°C/32°F

Erroneous solution used for
the offset calibration

For pH calibration:
Make sure the buffer solu­tion used is pH 4 or 10.
Use fresh solutions.

For temperature calibration:
Make sure the hot water is
at 50°C/122°F

Low Battery Voltage
Replace the batteries.

LO BAT

Excel© Copyright of "Microsoft Co."
Lotus 1-2-3© Copyright of "Lotus Co."

26

MEMORY ORGANIZATION

Capacity: 8,000 data samples which are di­vided into 16 pages.

Each time a new logging period starts, it
automatically starts from a new page.

If “LOGGING” is still on, and the available
page is “0” the meter will overwrite the first
LOT DATA in the existing memory. During
logging the meter automatically returns to the
oldest page in the memory and if it contains
data, it will overwrite it. In this case the first
log will not correspond to the oldest set of
data.

It is recommended to periodically “clean” the
memory. Save all data in a PC if you need to
keep a record and then disconnect the bat­teries for approximately 1 minute. If you do
this, remember to set the date and time,
once the batteries have been connected again.

ATTENTION:

Data is stored in memory until the batteries
are removed.

To replace batteries without loosing data, plug
the adapter in and proceed with battery re­placement as described on page 32. Only
once the batteries have been replaced it is
possible to unplug the adapter without loos­ing the stored data.

27

ELECTRODE CONDITIONING

AND MAINTENANCE

Reference
Filling Hole

Fill Hole
Screw

Reference
Filling Hole

Sensitive
Wire

Reference
Wire

Reference
Junction

Glass
Bulb

Plastic Body
pH Electrode

Glass Body

pH Electrode

Reference

Wire

Sensitive

Wire

Reference

Junction

Glass

Bulb

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 form

inside the glass bulb. The electrode cannot
function properly under these conditions. These
bubbles can be removed by "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 HI80300 Storage
Solution for at least one hour.

28

For refillable electrodes:

If the fill solution (electrolyte) is less 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 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 (4 cm /1½") in the sample

and stir gently for approx. 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 assure a quick
response time, the glass bulb and the junc­tion should be kept moist and not allowed to
dry out.

Replace solution in the protective cap with a
few drops of HI 70300 or HI80300 Storage
Solution or, in its absence, Filling Solution
(HI7071 or HI8071 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

DRY OR IN DISTILLED WATER.

AmpHel® is a registered Trademark of "Hanna Instruments"

29

PERIODIC MAINTENANCE

Inspect the electrode and the cable. The cable
used for the connection to the meter must be
intact and there must be no points of broken
insulation on the cable or cracks on the
electrode stem or bulb. Connectors must be
perfectly clean and dry. If any scratches or
cracks are present on the electrode body,
replace the electrode. Rinse off any salt de­posits with water.

For refillable electrodes:

Refill the electrode 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 HI7061 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 HI7074 or HI8074

Inorganic Cleaning Solution

for 15 minutes.

- Oil/grease Rinse with Hanna HI7077 or

HI 8077 Oil and Fat Cleaning
Solution.

IMPORTANT: After performing any of the

cleaning procedures rinse the electrode thor­oughly with distilled water, drain and refill the
reference chamber with fresh electrolyte, (not
necessary for GEL filled electrodes) and soak
the electrode in HI 70300 or HI80300 Stor-
age Solution for at least 1 hour before tak­ing measurements.

30

TROUBLESHOOTING

Evaluate your electrode performance based
on the following possibilities.

• 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 HI8071 for single
junction or HI7082 or HI8082 for double
junction electrodes.

• Dry Membrane/Junction: Soak in Stor­age Solution HI70300 or HI80300 for at

least 1 hour.

• Drifting: Soak the electrode tip in warm
Hanna Solution HI7082 or HI8082 for one
hour then rinse the tip with distilled water.
Refill with fresh HI7071 or HI8071 for
single junction electrodes and HI 7082 or

HI8082 for double junction electrodes.

• Low Slope: Refer to the cleaning proce-

dure above.

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

• Slow Response/Excessive Drift: Soak
the tip in Hanna Solution HI7061 or HI8061
for 30 minutes, rinse thoroughly in dis­tilled water and then follow the Cleaning
Procedure above.

31

BATTERY REPLACEMENT

-

When the batteries are run
down "LOBAT" is displayed
on the Liquid Crystal Dis-

LO BAT

play to warn the user.
Battery replacement must

only take place in a non
hazardous area using the
battery types specified in
this instruction manual (see
page 42).

-

1.5V

+

-

1.5V

+

-

1.5V

1.5V

+

SCREW

+

POTS

-

RESET

In order to replace run down
batteries, simply remove
the two screws on the rear
cover of the instrument and
replace the four 1.5V AA
batteries with new ones,
paying attention to the cor­rect polarity.

A 12VDC power source can also be used to
power the unit (see the Accessories section
page 41).

Note: The instrument uses the following con-

figuration:

+

It is recommendable to purchase the Hanna
HI710005 (110VAC) and HI710006 (220VAC)
voltage adapters that use the proper polarity
configuration.

HI931300 and HI931301 can also be used
with other adapters. In this case, remember
to check the correct polarity of your adapter
before connecting it to the meter.

TO RESET THE METER

In case of any functional problem, reset the
meter by pressing with a pencil the black
button located close to the battery compart­ment (see the picture above).

32

0

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

C

TEMPERATURE-RESISTANCE

CORRELATION 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

-10

-20-2

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.

33

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 readings 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

34

ACCESSORIES

pH CALIBRATION SOLUTIONS

HI774P pH 4.01 & 7.01 Buffer Solution,

30mL each

HI7004M pH 4.01 Buffer Solution, 230 mL
HI7004L pH 4.01 Buffer Solution, 460 mL
HI7006M pH 6.86 Buffer Solution, 230 mL
HI7006L pH 6.86 Buffer Solution, 460 mL
HI777P pH 7.01 Buffer Sol. 2x30 mL
HI7007M pH 7.01 Buffer Solution, 230 mL
HI7007L pH 7.01 Buffer Solution, 460 mL
HI7009M pH 9.18 Buffer Solution, 230 mL
HI7009L pH 9.18 Buffer Solution, 460 mL
HI7710P pH 7.01 & 10.01 Buffer Solution,

30 mL each

HI7010M pH 10.01 Buffer Solution, 230 mL
HI7010L pH 10.01 Buffer Sol., 460 mL

pH CALIBRATION SOLUTIONS IN FDA AP­PROVED BOTTLE

HI8004L pH 4.01 Buffer Solution, 460 mL
HI8006L pH 6.86 Buffer Solution, 460 mL
HI8007L pH 7.01 Buffer Solution, 460 mL
HI8009L pH 9.18 Buffer Solution, 460 mL
HI8010L pH 10.01 Buffer Solution, 460 mL

ELECTRODE STORAGE SOLUTIONS

HI70300M Storage Solution, 230 mL
HI70300L Storage Solution, 460 mL

ELECTRODE STORAGE SOLUTIONS IN
FDA APPROVED BOTTLE

HI80300M Storage Solution, 230 mL
HI80300L Storage Solution, 460 mL

35

ELECTRODE CLEANING SOLUTIONS

HI7061M General Cleaning Sol., 230 mL
HI7061L General Cleaning Sol., 460 mL
HI7073M Protein Cleaning Sol., 230 mL
HI7073L Protein Cleaning Sol., 460 mL
HI7074M Inorganic Cleaning Sol., 230 mL
HI7074L Inorganic Cleaning Sol., 460 mL
HI7077M Oil & Fat Cleaning Sol., 230 mL
HI7077L Oil & Fat Cleaning Sol.,460 mL

ELECTRODE CLEANING SOLUTIONS IN
FDA APPROVED BOTTLE

HI8061M General Cleaning Solution, 230 mL
HI8061L General Cleaning Solution, 460 mL
HI8073M Protein Cleaning Solution, 230 mL
HI8073L Protein Cleaning Solution, 230 mL
HI8077M Oil & Fat Cleaning Solution, 230mL
HI8077L Oil & Fat Cleaning Solution, 460mL

REFILLING ELECTROLYTE SOLUTIONS

HI7071 3.5M KCl + AgCl Electrolyte,

4x50 mL, for single junction elec­trodes

HI7072 1M KNO3 Electrolyte, 4x50 mL
HI7082 3.5M KCl Electrolyte, 4x50 mL,

for double junction electrodes

REFILLING ELECTROLYTE SOLUTIONS IN
FDA APPROVED BOTTLE

HI8071 3.5M KCl + AgCl Electrolyte,

4x50 mL, for single junction elec­trodes

HI8072 1M KNO3 Electrolyte, 4x50 mL
HI8082 3.5M KCl Electrolyte, 4x50 mL,

for double junction electrodes

36

pH ELECTRODES

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

S = SCREW-TYPE CONNECTOR

HI1043B / 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"

HI1053B / 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"

HI1083B

Glass-body, micro, Viscolene, nonrefillable,
combination pH electrode. Use: biotechnology,
micro titration.

HI 1083

12 mm

0.5"

5 mm

0.2"

120 mm

37

3 mm

0.12"

"

3.0 mm DIA

0.12"

HI1131B / HI1111S

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"

HI1330B / HI1310S

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 / HI1311S

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 / HI1210S

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

12 mm

0.5"

HI 1230

120 mm

"

"

4.7"

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

38

HI2031B / HI2020S

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

6 mm

0.25"

HI 2031

75 mm

"

"

2.95"

HI1332B / HI1312S

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

12 mm

0.5"

HI 1332

"S" VERSION

120 mm

4.7"

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"

Kynar® is registered Trademark of "Pennwalt Corp."

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

39

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.

12 mm

0.5"

FC 220

9.5mm DIA

120 mm

4.7"

0.37"

FC911B

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"

HI1413B / 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"

Kynar® is registered Trademark of "Pennwalt Corp."

40

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

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

POWER UNITS

HI710005 Voltage adapter from 110 VAC

to 12 VDC

HI710006 Voltage adapter from 220 VAC

to 12 VDC

41

OTHER ACCESSORIES

BAT1.5AA/P 1.5V AA battery (8 pcs)
ChecktempC Pocket-size thermometer with

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

150.0°C)

HI76405 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 9200 Infrared Transmitter
HI 92000 Windows® software for data

transfer to PC

HI 931001 pH and ORP electrode simula-

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

MAN9313R1 Instruction manual
HI710031 Rugged carrying case

Windows® is registered Trademark of "Microsoft Co."

42

ELECTRODE APPLICATION

REFERENCE GUIDE

Application Electrodes

1.Aquarium HI 1332B, HI 1911B, HI1312S

2. Bath-water HI1910B, HI 1130B, HI1110S

3. Beer HI1131B, HI 1111S

4. Bread HI2031B, FC 200B, HI2020S, FC200S

5.Cheese FC200B, FC 200S

6. Dairy products FC911B, FC 100B

7. Dirty water HI 1910B, HI1912B

8. Emulsions HI1053B, HI1050S

9.Environment HI1230B, HI 1210S

10.Flasks HI1331B, HI1310S

11. Food industry general use FC911B, FC 100B

12. Fruit FC200B, FC220B, FC 200S

13. Fruit juices, organic FC 210B

14. Galvanizing waste solution HI 1130B, HI1912B, HI1110S

15.Heavy-duty applications HI 1135B, HI1115S

16. High purity water HI 1053B, HI1050S

17.Horticulture HI1053B, FC 200B, HI1050S, FC 200S

18. In-line applications HI 1134B, HI1135B, HI 2114B, HI2910B,

19. Laboratory general use HI1131B, HI 1230B, HI1332B, HI 1330B

20. Leather HI1413B, HI1410S

21. Lemon juice FC100B

22. Meat FC200B, HI 2031B, FC200S, HI2020S

23. Micro plate sampling of less than HI 1083B, HI1080S
100 mL

24. Milk and Yogurt FC 210B

25.Paints HI1053B, HI 1050S

26. Paper HI 1413B, HI 1410S

27.Photographic chemicals HI1230B, HI1210S

28. Quality control HI1332B, HI 1312S

29.Sausages FC 200B, HI 2031B, FC200S, HI 2020S

30.Semisolid products HI 2031B, HI2020S

31. Ski n HI 1413B, HI 1410S

32.Soil samples HI1230B, HI 1210S

33.Solvents HI1043B, HI 1040S

34. Strong acid HI 1043B, HI1040S

35. Submersion application HI 1130B, HI1110S

36. Surface measurements HI1413B, HI1410S

37. Swimming pool H1130B, HI 2114B, HI 2910B

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

39. Titrations with wide temperature HI1131B, HI 1111S
range

40. Very high humidity FC 911B, HI1912B, HI1911B

41. Vials and test tube HI 1330B, HI1310S

42. Wine processing FC220B

HI1114S, HI 1115S

HI1111S, HI 1210S, HI1312S, HI 1310S

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

43

WARRANTY

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

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

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

This warranty is limited to repair or replace­ment free of charge.

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

44

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 pH meters

HI 931300 HI 931301

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: 15-03-1996

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 time.

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

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 60 VDC.

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

45

Stay in Touch with the Manufacturer!

MAN9313R1

10/96