Hanna Instruments HI 9141 User Manual

Untitled-22

1

Instruction Manual

HI 9141 - HI 91410

Portable

Printing and Logging

Dissolved Oxygen Meters

HI 91410

MICROPROCESSORLOGGING
DISSOLVEDOXYGEN METER

RANGE

O

0. . . 19.99ppm

ON/OFF

FUNC

CAL

These Instruments are in Compliance with the CE Directives

2

PAPER

TIO

N

UP

DO

PR

IN

T

L

O

2

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 neces-

sary 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
directives EN 50081-1 and 50082-1.

TABLE OF CONTENTSTABLE OF CONTENTS

TABLE OF CONTENTS

TABLE OF CONTENTSTABLE OF CONTENTS

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

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

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

Functional Description HI9141 ................... 4

Functional Description HI91410.................. 5

Specifications ............................................. 6

Initial Preparation........................................ 7

Calibration ................................................... 9

Taking Measurements .............................. 11

Setting Date, Time, Printing Interval ......... 13

Printing / Recording with HI9141.............. 17

Printing / Logging with HI91410 ............... 19

Altitude Compensation.............................. 23

Salinity Compensation.............................. 24

Temperature Compensation ...................... 24

W

N

G

Probe & Membrane Maintenance ............. 25

Data Transfer to PC.................................. 2 7

Fault Functions ........................................ 29

Memory Organization (HI91410 only) ....... 30

Printer Maintenance.................................. 31

Battery Replacement ................................ 33

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

Warranty ................................................... 36

CE Declaration of Conformity ................... 37

http://www.hannainst.com

ISO 9000 Certified
Company since 1992

1

2

Untitled-22

3

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.

Each Printing D.O. meter is supplied complete
with:

• 1.5V AA size batteries (4 pieces)

• DO Probe with 4 m/13' cable (HI 76407/4)

• Membrane cap, 2 pieces (HI 76407A)

• Electrolyte solution, 30 ml (HI 7041S)

• Paper rolls, 5 pieces

• 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 packing with
the supplied accessories.

GENERAL DESCRIPTION

The HI 9141 and HI 91410 are portable, mi­croprocessor-based, printing (and logging
HI 91410 only) meters for Dissolved Oxygen
measurements.

Housed in a rugged and lightweight case,
with an easy-to-read LCD, they are the first
portable D.O. meters in their category to
incorporate a printer. The printer uses plain,
non-fading paper.

They are capable of storing up to 8,000 read­ings. These readings can be printed and/or
transferred to a computer system for elabora­tion or permanent storage (HI 91410 only).
An optional HI 9200 infrared transmitter can
be used to interface the HI 91410 to a com-
puter for data transfer.

Dissolved oxygen and temperature measure­ments can be performed with lab-grade preci-

3

4

sion in the field (wastewater treatment, fish­farming, water analysis, etc.) as well as in
the laboratory without compromising accu­racy.

Dissolved oxygen is indicated in ppm (parts
per million).

Temperature is compensated for by the meter's
ATC circuitry. Salinity compensation in water
allows direct determination of dissolved oxy­gen in saline waters and the altitude compen­sation readjusts for the altitude variance.

The dissolved oxygen probe has a membrane
covering the polarographic sensors and a built­in thermistor for temperature measurements
and compensation. This permeable PTFE
membrane isolates the sensor elements from
the testing solution, but allows oxygen to
enter. When a voltage is applied across the
sensor, oxygen that has passed through the
membrane reacts causing a current flow.

4

Untitled-22

ON/OFF

PAPER

FUNCTION UP

DOWN

CAL

PRINT

RECORD

6

7
8

9

10

4
5

3

2

1

MICROPROCESSORPRINTING
DISSOLVEDOXYGEN METER

HI 9141

RANGE

O20. . . 19.99ppm

°C 0. . . +50.0°C

5

FUNCTIONAL DESCRIPTION PROBE

3

1

4

4

7
8

10

9

5

6

2

6

FUNCTIONAL DESCRIPTION HI9141

1. Probe connector and socket for adapter

2. UP key, to set date, time, printing interval,
values for altitude and salinity compensation

1. D.O. Probe

2. Protective Cap

3. Watertight Shielded Cable

4. Polypropylene Probe Body

5. Temperature Sensor

6. O-Ring Seal

7. Silver Chloride Anode

8. Platinum Cathode (sensor)

9. Oxygen Permeable PTFE

Membrane

10. Membrane Cap

5

3. DOWN key, to set date, time, printing
interval, values for altitude and salinity
compensation

4. PRINT key, to obtain a printout

5. RECORD key, to enter the recording mode

6. Liquid Crystal Display

7. PAPER key, to move the paper up

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

9. FUNCTION key, to select the D.O. or
temperature mode and for compensation
selection

10. CAL key, to enter or exit calibration mode.

6

Untitled-22

7

FUNCTIONAL DESCRIPTION HI91410

1

6

HI 91410

7

MICROPROCESSOR LOGGING
DISSOLVEDOXYGEN METER

8

9

10

1. Probe connector and socket for adapter

2. UP key, to set date, time, printing interval,
values for altitude and salinity compensation

3. DOWN key, to set date, time, printing inter­val, values for altitude and salinity compen­sation

4. PRINT key, to obtain a printout

5. LOG key, to enter or exit the logging mode

6. Liquid Crystal Display

7. PAPER key, to move the paper up

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

9. FUNCTION key, to select the D.O. or
temperature mode and for compensation
selection

10. CAL key, to enter or exit calibration mode.

ON/OFF

FUNCTION UP

CAL

PAPER

PRINT

RANGE

O20. . . 19.99ppm
°C 0. . . +50.0°C

7

DOWN

LOG

8

SPECIFICATIONS HI9141 & HI91410

Range DO 0.00 to 19.99 ppm

Resolution DO 0.01 ppm

Accuracy DO 1.5% of full scale

Typical EMC DO ±0.6 ppm
Deviation Temp. ±3°C

Calibration Automatic in saturated air

Temperature Automatic from 0 to 30°C
Compensation (32 to 86°F)

2
3
4
5

Altitude Compensation 0 to 1,900 m (6,230')

Salinity Compensation 0 to 40 g/l

Power Supply 4 x 1.5V AA batteries,

Printer Low-power impact type belt,

Printing /Logging 1, 2, 5, 10, 15, 30,
Interval 60, 120, 180 minutes

Environment 0 to 50°C; 95% RH
Dimensions 220 x 82 x 66 mm

Shipping Weight 1.7 kg (3.8 lb.)
Response Time The response time is about 20

Temp. 0.0 to 50.0°C

Temp. 0.1°C

Temp. ±0.5 °C

at 100%

Resolution 100 m (328')

Resolution 1 g/l

approx. 70 hours of life;

Auto shut-off after 4 hours.

Power socket for

12VDC adapter

14 characters per line using
38mm plain paper

(8.7 x 3.2 x 2.6")

seconds for a 95% reading at
a constant temperature of
25°C. The response time for
low oxygen readings or at
low temperature is approxi­mately 40 seconds. Allow
more time to obtain more ac­curate readings.

8

Untitled-22

S

9

INITIAL PREPARATION

Each meter is supplied complete with batter­ies. Remove the back cover, unwrap the bat­teries and install them while paying attention
to the polarity (see also page 33).

To prepare the instrument for use, connect
the D.O. probe to the meter securely by
aligning the pins with the socket located on
the top of the meter, pushing the plug in and
tightening the threaded ring. Follow the "Ini­tial Probe Preparation" procedure explained
on page 8.

To switch the meter on, press the ON/OFF
key and "Cond" appears on the display to
inform that the probe is in the auto-condition­ing (polarization) mode. Once the "Cond" dis­appears, the instrument can be calibrated
(see page 9).

ON/OFF

If the probe is disconnected, the meter will
display "°C ---.-" and print "---- ppm" and
"----°C" to alert the user.

°C

This also indicates the possibility of a broken
probe cable.

To maximize battery life, the display is auto­matically switched off after 4 hours of non­use. However, the meter will continue to monitor
dissolved oxygen and temperature (if in the
recording/logging mode) .

<>

0009 *00.50

9

14-01-96

---- ppm

---- ° C

10

INITIAL PROBE PREPARATION

All probes shipped from Hanna Instruments
are dry. To hydrate the probe and prepare it
for use, connect it to the meter and proceed
as follows.

1. Remove the red and black plas­tic cap. This cap is for shipping
purposes and can be thrown
away.

2. Wet the sensor by soaking the
bottom 2½ cm (1") of the probe
in electrolyte (HI 7041S) for
5 minutes.

3. Rinse the membrane cap (HI 76407A sup­plied in the kit with the meter) with elec­trolyte solution
while shaking it
gently. Refill with
clean electrolyte
solution.

4. Gently tap the
sides of the mem­brane cap with
your finger tip to
ensure that no air
bubbles remain
trapped. To avoid
damaging the
membrane, do not
tap the membrane
directly on the bottom.

5. Make sure that the rubber O-ring sits prop­erly inside the membrane cap.

6. With the sensor facing down, slowly screw
the cap clockwise. Some elec­trolyte will overflow.

When not in use, place the protec­tive cap supplied in the kit with the
meter.

FILL FIRST

THEN TAP

10

hipping

cap

black

red

THEN SCREW

BACK ON

Untitled-22

11

CALIBRATION

PROBE POLARIZATION

The probe is under polarization with a fixed
voltage of approximately 800 mV.
Probe polarization is essential for stable mea­surements with the same recurring degree of
accuracy.

With the probe properly polarized, oxygen is
continually "consumed" when it passes
through the sensitive diaphragm and dissolves
in the electrolyte solution contained in the
probe.

If polarization is interrupted, the electrolyte
solution continues to be enriched with oxy­gen until it reaches an equilibrium with the
surrounding solution.

Whenever measurements are taken with a
non-polarized probe, the oxygen level revealed
is both that of the tested solution as well as
that present in the electrolyte solution. This
reading is incorrect.

The calibration of this instrument is very simple
and is recommended every time the meter is
turned on.

• Make sure the probe is ready for mea­surements (see page 8), i.e. the mem­brane cap is filled with electrolyte and the
probe is connected to the meter and prop­erly polarized.

• Switch the meter on by pressing the ON/
OFF key and "Cond" appears on the dis­play to inform that the probe is in auto­conditioning (polarization) mode.

ON/OFF

• Once the "Cond" disappears, the instru­ment can be calibrated.

11

12

• For an accurate calibration, it
is recommended to wait for 5
or 10 minutes to ensure pre­cise conditioning of the probe.

• Remove the protective cap.

• Press the CAL key. "CAL" appears on the

primary display to indicate that the instru­ment is in calibration mode.

CAL

• The instrument will automatically standard­ize itself to the actual saturation value and
after approximately 1 minute will show the
value in ppm corresponding to the maxi­mum oxygen level soluble in water at that
particular temperature and at the condi­tions of altitude and salin­ity previously set. Once the
value in ppm is displayed,
the calibration is com­pleted.

• Press the FUNCTION key
and make sure F1 and
F2 are set to the appropri­ate altitude and salinity val­ues (see pages 23-24).

Notes: • The instrument must also be cali-

brated whenever the probe, the mem­brane or the electrolyte solution are
changed.

• If you want to exit
the calibration mode
during the calibra­tion, press the CAL
key again.

12

FUNCTION

CAL

Untitled-22

13

TAKING MEASUREMENTS

Make sure the meter has been
calibrated (see page 9) and
the protective cap has been
removed. Immerse the tip of
the probe in the sample to be
tested.

Make sure the temperature sensor is also
immersed.

Allow approximately one minute for the meter
to stabilize and read the mg/l (ppm) value of
dissolved oxygen on the display.

For accurate dissolved oxygen measurements
a water movement of 0.3 m/sec is required
at a minimum. This is to ensure that the
oxygen-depleted membrane surface is con­stantly replenished. A moving stream will pro­vide adequate circulation.

During field measurements, this condition may
be met by manually agitating the probe. Ac­curate readings are not possible while the
liquid is at rest.

During laboratory measurements, the use of
a magnetic stirrer to ensure a certain velocity
in the fluid is recommended. In this way,
errors due to the diffusion of the oxygen
present in the air in the solution are reduced
to a minimum.

At all times, the time necessary for thermal
equilibrium to occur between the probe and
the measurement sample must be allowed (a
few minutes if the temperature difference is
only several degrees).

ppm READINGS

The ppm readings allow the
user to read the concentra­tion of the dissolved oxygen

13

14

directly on the display expressed in ppm
(mg/l).

If the sample contains significant salinity
concentration or if you are performing the
measurements at an altitude different from
sea level, the readout values must be cor­rected, taking into account the lower de­gree of oxygen solubility in such occasions
as explained on pages 23-24.

Remember to set the altitude and/or the
salinity before taking ppm measurements.
The meter will automatically compensate
for these factors.

TEMPERATURE READINGS

The probe has a built-in temperature sensor.
Press the FUNCTION key to display the

measured temperature.

°C

FUNCTION

Allow the probe to reach the thermal equilib­rium before taking any measurement. Ther­mal equilibrium can take several minutes to
be reached. The greater the difference be­tween the temperature at which the probe
was stored and the temperature of the sample,
the longer the time will be.

If "°C ---.-" is displayed, it indicates that the
D.O. probe is not properly connected. This
also indicates the possibility of a broken probe
cable.

°C

14

Untitled-22

15

SETTING DATE, TIME AND

PRINTING INTERVAL

Turn the instrument on by
pressing the ON/OFF key and
wait for the "Cond" symbol to
disappear.

Press the FUNCTION key twice and the dis­play will show "F1" on the secondary display.

FUNCTION

Press the CAL key and the display will show
the date setting.

CAL

Press the CAL key again and the year will
start blinking on the secondary LCD.

CAL

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

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

16

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

UPDOWN

Press the CAL key, the day will start blink-

ON/OFF

DATE

DATE

UPDOWN

ing.

DATE

CAL

Use the UP or the DOWN keys to select the
correct day.

UPDOWN

Press the CAL key to confirm the selected
date and press the FUNCTION key to leave
the date setting mode.

CAL

FUNCTION

Press the FUNCTION key again to display
"F2" on the secondary display.

FUNCTION

Press the CAL key and the display will show
the time and the printing interval setting.

TIME

CAL

INTV

Press the CAL key again and the printing
interval will start blinking.

CAL

DATE

15

CAL

16

TIME

INTV

Untitled-22

17

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

Set the desired interval by pressing the CAL
key once and the hour will start blinking.

CAL

To select the hour, press the UP or the
DOWN keys (24 hour clock).

Press the CAL key once, the minutes will
start blinking.

CAL

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

Press the CAL key to confirm the selected
time and printing interval.

18

Press the FUNCTION key to leave the time
setting mode.

UPDOWN

Press the FUNCTION key again to display
D.O. readings.

TIME

INTV

Your time, date and printing interval are now
set and stored in the memory even when the
display is switched off.

UPDOWN

TO VIEW DATE / TIME / TEMPERATURE

To view the temperature press the FUNC­TION key.

TIME

INTV

To view the date first, press the FUNCTION
key to display "F1" and then the CAL key.

UPDOWN

FUNCTION

To view the time first, press the FUNCTION
key until the display shows "F2" and then the
CAL key. This also displays the selected
prinitng interval.

FUNCTION

FUNCTION

FUNCTION

°C

CAL

DATE

TIME

CAL

FUNCTION

INTV

CAL

Press the FUNCTION key until the display
returns to the D.O. readings.

FUNCTION

17

18

Untitled-22

19

PRINTING / RECORDING

WITH HI 9141

To print the measured values
press the PRINT key.

The printout provides the fol­lowing information:
a- Running sample number
b - Date (DD-MM-YY)
c - Time (HH-MM)
d - D.O. value in ppm.
e - Temperature value

in °C.

RECORDING MODE (PROGRAMMED
PRINTOUTS)

Press the RECORD key to enter the record­ing mode. The log number and the interval
time will appear for a few seconds on the
display to indicate the correct operational
mode.

The meter will print the measure­ment taken in that moment, and
will print at the interval selected
thereafter until the RECORD key
is pressed.

Each printout provides the following informa­tion:

a- A running log number
b- A running sample number (in that particu-

lar log)

0015 *00.50

<>

LOG

RECORD

14-01-96

--02-- 0005M
0003 *15.50

<>

8.5 ppm

25.4 ºC

PRINT

14-01-96

8.1 ppm

20.4 °C

RECORD

a
b

c
d
e
f
g

20

c - Date (DD-MM-YY)
d- Printing interval indicator in minutes
e- Time (HH.MM)
f - D.O. value in ppm
g- Temperature value in °C.

When the meter is in record­ing mode "LOG" is displayed

a
b

c
d
e

on the bottom left corner of
the LCD with the temperature
value on the primary display.

Notes:

• It is recommended to use the external power
supply (HI710005 or HI710006) during
recording mode, especially when many
printouts are required.

• Before proceeding with recording, make
sure there is enough paper for your
measurements. When the paper is fin­ished the meter will not advise the opera­tor and the printouts could be lost.

• It is possible to insert a new paper roll
during recording session (see page 31).

• If the PRINT key is pressed while
still in recording mode, a print­out is produced without affecting
the running sample number.

• Once in recording mode, the
printing interval cannot be
changed. Exit the recording
mode first (pressing the
RECORD key) before setting the new inter­val (see page 13).

TO STOP RECORDING

In order to quit the recording mode, press the
RECORD key. This will generate a recording
exit status printout.

Log number

Total sample number

==07== 0005M

°C

LOG

10-01-96

0016 *16.25
#1 20.0 °C
#2 57.3 °C..

PRINT

RECORD

LOG EXIT
Date/Time

19

20

Untitled-22

21

PRINTING / LOGGING

WITH HI 91410

To print the measured values
shown on display, press the
PRINT key.

This function can be activated
in normal operation mode as
well as during logging (see below).

When in measurement mode, the printout
provides the following information:
a- Running sample number
b- Date (DD-MM-YY)
c - Time (HH-MM)
d- D.O. value in ppm.
e- Temperature

value in °C.

LOGGING MODE

This function is suggested when remote mea­surements have to be taken automatically
without the necessity of an operator and for a
long period of time. In this mode data will be
stored directly into memory.

Set the appropriate logging interval (see
page13).

Press the LOG key 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.

LOG

The printer will print a complete set of data
and the "LOG" symbol will appear on the
bottom left corner of the LCD.

0001 *16.50

<>

LOG

21

PRINT

14-01-96

8.95 ppm

20.4 °C

Log number

Page Number

22

The printout provides the following informa­tion:
a- A running log number
b- Running sample number (in that particular

log)

c - Date (DD-MM-YY)
d- Printing interval indicator in minutes
e- Time (HH-MM)
f - D.O. value in

ppm.

g- Temperature

value in °C.

14-01-96

--02-- 0005M
0001 *16.50

<>

8.95 ppm

20.4 °C

To continue logging without printing, press

a
b

c
d
e

now the CAL key and the "LOG" symbol on
display will start to blink and no printout will
be generated.

LOG

CAL

If you wish to restart printing press the CAL
key again.

Notes:

• Once in the logging mode,
the interval cannot be
changed. Exit the logging
mode first (pressing the
LOG key) before setting
the new interval.

• If the PRINT key is pressed
while in logging mode, a
printout is produced with­out affecting the running
sample number.

22

PRINT

a
b

c
d
e
f
g

LOG

Untitled-22

23

LOGGING MODE WITH PRINTING

This function is suggested when an immedi­ate report of the measurement is required in
addition to the recording of the data into
memory.

Press the LOG key 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.

LOG

The printer will print a complete set of data
and the "LOG" symbol will appear on the
secondary display.

Each printout provides the following informa­tion:
a- A running log number
b- Running sample number (in that particular

log)
c - Date (DD-MM-YY)
d- Printing interval indicator in minutes
e- Time (HH-MM)
f - D.O. value in ppm.
g- Temperature value in °C.

--03-- 0010M

<>

0001 *19.10

LOG

14-01-96

8.02 ppm

22.1 °C

23

Log number

Page Number

a
b

c
d
e
f
g

24

It is always possible to switch from the log­ging with printing function to the logging func­tion. Press the CAL key and the "LOG" sym­bol will start to blink to indicate that the data
are now stored only into memory.

CAL

Notes:

• It is recommended to use the external power
supply (HI710005 or HI710006) during
logging with printing mode, especially when
many printouts are required.

• Before proceeding with logging with print­ing, make sure there is enough paper for
your measurements. When the paper is
finished the meter will not advise the op­erator and the printouts could be lost. If
this happens, data will continue to be
stored into memory.

• It is possible to insert a new paper roll
during logging session (see page 31).

• Once in the logging mode,
the interval cannot be
changed. Exit the logging
mode first (pressing the
LOG key) before setting
the new interval.

• If the PRINT key is pressed
while in logging mode, a
printout is produced with­out affecting the running
sample number.

TO STOP LOGGING

Press the LOG key, this will generate a log
exit status printout.

Log number

Total sample number

LOG

- -09- - 0001M

==07== 0005M

0016 *20.00

<>

0016 *16.25
#1 20.0 °C.

24

14-01-96

10-01-96

LOG

PRINT

LOG EXIT
Date/Time

Untitled-22

25

ALTITUDE COMPENSATION

Press the FUNCTION key twice and “F1” will be
displayed.

FUNCTION

Use the UP and the DOWN keys to set the
altitude between 1 and 1900 m, in steps of
100 m (1 meter = 3.28 feet).

Altitude affects D.O. concentration decreasing
its value. The following table reports the maxi­mum oxygen solubility at various temperatures
and altitudes.

°C

0
2
4
6

8
10
12
14
16
18
20
22
24
26
28
30
32
34
36
38
40

Altitude, Meters above Sea Level

0 m

300 m

600 m

14.6

14.1

13.3

12.7

12.0

11.4

10.9

10.4

13.6

12.9

12.2

11.6

11.0

10.5

10.1

9.9

9.6

9.7

9.2

9.2

8.7

8.8

8.5

8.4

8.1

8.1

7.8

7.8

7.5

7.5

7.3

7.2

7.0

7.1

6.8

6.9

6.6

6.6

6.3

6.4

6.2

6.2

6.0

13.8

13.1

12.4

11.8

11.3

10.8

10.3

9.9

9.5

9.1

8.7

8.4

8.1

7.8

7.5

7.3

7.1

6.8

6.6

6.4

900 m

13.2

12.4

11.9

11.2

10.6

10.2

9.7

9.3

8.9

8.6

8.2

7.8

7.5

7.3

7.0

6.8

6.6

6.4

6.1

5.9

5.8

1200 m

25

12.7

12.0

11.4

10.8

10.3

9.8

9.4

9.0

8.6

8.3

7.9

7.7

7.3

7.0

6.8

6.5

6.4

6.2

5.9

5.7

5.6

UPDOWN

1500 m

12.3

11.6

11.0

10.4

9.9

9.5

9.1

8.7

8.3

8.0

7.7

7.3

7.1

6.8

6.6

6.3

6.1

6.0

5.7

5.6

5.4

1800 m

11.8

11.2

10.6

10.1

9.6

9.2

8.8

8.3

8.0

7.7

7.4

7.1

6.8

6.6

6.3

6.1

5.9

5.8

5.5

5.4

5.2

°F

32.0

35.6

39.2

42.8

46.4

50.0

53.6

57.2

60.8

64.4

68.0

71.6

75.2

78.8

82.4

86.0

89.6

93.2

96.8

100.4

104.4

26

SALINITY COMPENSATION

Press the FUNCTION key until “F2” will be
displayed.

FUNCTION

Use the UP and DOWN keys to set the salinity
between 0 and 40 g/l.

UPDOWN

Salinity affects D.O. concentration decreasing
its value. Below is the table showing the maxi­mum solubility of oxygen at various temperature
and salinity.

°C
10

12
14
16
18
20
22
24
26
28

The D.O. probe has a built-in sensor for
temperature so that the D.O. readings are
automatically compensated for temperature
effects.

Salinity (g/l) at Sea Level

0 g/l

10 g/l

20 g/l

11.3

10.6

10.1

7.4

9.9

9.5

9.7

9.1

9.3

8.7

8.9

8.4

8.5

8.0

7.8

8.2

7.9

7.5

7.6

7.2

7.0

10.8

10.3

9.9

9.5

9.1

8.7

8.4

8.1

7.8

TEMPERATURE COMPENSATION

26

30 g/l

9.3

8.9

8.6

8.2

7.9

7.6

7.3

7.1

6.8

6.6

35 g/l

9.0

8.6

8.3

8.0

7.6

7.4

7.1

6.9

6.6

6.4

°F

50.0

53.6

57.2

60.8

64.4

68.0

71.6

75.2

78.8

82.4

Untitled-22

27

PROBE AND MEMBRANE MAINTENANCE

The oxygen probe body is made of reinforced
plastic for maximum durability.
A thermistor temperature sensor provides tem­perature measurements of the sample tested.
It is always recommended that the protective
cap be kept on the probe when the probe is
not in use to provide protection against dam­age and dirt.

To replace the membrane or refill with
electrolyte, proceed as follows:

• Remove the protective
cap by gently twisting
and pulling it off the
body of the probe (see
fig. 1).

• Unscrew the membrane
cap by turning it coun­terclockwise (see fig.2).

• Wet the sensor by
soaking the bottom 2½
cm (1") of the probe in
electrolyte (HI 7041S)
for 5 minutes.

• Rinse the new mem­brane cap (HI 76407A)
supplied with the meter
with electrolyte solution
while shaking it gen­tly. Refill with clean
electrolyte solution.

• Gently tap the sides of
the membrane cap with
your finger tip to en­sure that no air bubbles
remain trapped. Do no
directly tap the bottom
with your finger as this

27

TWIST

AND

PULL

fig. 1

UNSCREW

fig. 2

28

will damage the membrane.

• Make sure that the rubber O-ring sits
properly inside the membrane cap.

• With the sensor facing down, slowly
screw the membrane cap clockwise.
Some electrolyte will overflow.

The Platinum cathode (#8 in the Functional
Description at page 3) should always be
bright and untarnished. If it is tarnished or
stained, which could be due to contact
with certain gases or extended use with a
loose or damaged membrane, the cathode
should be cleaned. You can use a clean
lint-free cardboard or cloth. Rub the cath­ode very gently side to side 4-5 times.
This will be enough to polish and remove
any stains without damaging the platinum
tip. Afterwards, rinse the probe with deion­ized or distilled water and install a new
membrane cap using fresh electrolyte and
follow the steps above. Re-calibrate the
instrument.

Important: in order to have accurate and
stable measurements, it is important that
the surface of the membrane is in perfect
condition. This semipermeable membrane
isolates the sensor elements from the envi­ronment but allows oxygen to enter. If any
dirt is observed on the membrane, rinse
carefully with distilled or deionized water. If
any imperfections still exist, or any dam­age is evident (such as wrinkles or tears­holes), the membrane should be replaced.

Make sure that the O-Ring sits properly in
the membrane cap.

28

Untitled-22

29

DATA TRANSFER TO PC

HI91410 contains infrared emitting circuitry.

Press the FUNCTION key until "F2" is dis­played on the secondary LCD.

FUNCTION

Place your data-logger on the HI9200 Infra­red Transmitter (ensuring that the two infrared
LEDs are 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".

30

Data transmission from the instrument to the
PC is now much easier with new HI92000

®

Windows
fered by Hanna Instruments.

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

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

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

compatible application software of-

©

, Lotus 1-2-3©). Simply run your

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.

29

Windows® is registered Trademark of "Microsoft Co."

©

Excel

Copyright of "Microsoft Co."

©

Lotus 1-2-3

Copyright of "Lotus Co."

30

Untitled-22

31

FAULT FUNCTIONS

HI9141 and HI91410 are factory programmed

to automatically diagnose a fault. This is
displayed with error codes on the LCD.

Error codes:
PEr 0, PEr 1, PEr 2 = Short circuit on the

system, the meter should be returned
for repair (see Warranty section).

PEr 3 = Printer mechanism fault - repair

needed (see Warranty section).

PEr 4 = Printer clutch jammed - reset the

printer (see page 32).

PEr 9 = Printer jammed - reset the printer

(see page 32).

32

MEMORY ORGANIZATION

(HI91410 ONLY)

Capacity: 8,000 data samples, divided into

16 pages.

Data capacity per page:

500 data samples.

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 meter 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 the data with a PC if you need
to keep a record and then disconnect the
batteries for about 1 minute. If you do this,
remember to re-set the date, time, altitude
and salinity.

WARNING

Data are stored into memory until batteries
are removed.

If replacement of the batteries is needed and
data are not to be lost, plug the external
power supply in and proceed with batteries
replacement as described on page 33. Only
once the batteries have been replaced it is
possible to unplug the power supply without
loosing the stored data.

31

32

Untitled-22

33

PRINTER MAINTENANCE

TO CHANGE THE INK CARTRIDGE

When printouts become faint, it might be
necessary to change the ink cartridge. Con­tact your Hanna authorized center.

TO INSERT THE PAPER ROLL

The HI 9141 and HI91410 use plain paper
rolls 38 mm large. To insert a new roll is very
easy.

Open the paper cover pulling gently on the tab.

Take the carton cylinder out.

Insert the paper edge in the printer slot and
feed the printer by pressing the PAPER key.

34

Allow approximately 5 cm (2") to exit from
the printer and replace the paper cover.

TO RESET THE PRINTER

Take the battery
cover off by remov­ing the screws. Us­ing a pencil press
the black button.
This will reset the
printing mecha­nism.

Before replacing the
battery cover inves­tigate the cause of
the printer jam (e.g.
the paper caught
under the cover pre­venting the printer
from advancing pa­per feed).

Replace the battery
cover and secure
the screws.

-

1.5V

+

-

1.5V

+

-

1.5V

1.5V

+

SCREW

+

POTS

-

RESET

PAPER

33

34

Untitled-22

35

BATTERY REPLACEMENT

If "LO BAT" appears on the
display, it indicates that the
batteries are running down.
If it blinks during printing, it means that 200
printouts can be made before the batteries
are exhausted. When there is only sufficient
power for 100 printouts, the "LO BAT" sign is
displayed continuously on the LCD.

Battery replacement must only take place in
a non hazardous area using the battery types
specified in this instruction manual (see
page 35).

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 35).

Note: The instrument uses the following con-

figuration.

36

It is recommendable to purchase Hanna In-
struments HI 710005 and HI710006 voltage

°C

LO BAT

-

1.5V

+

-

1.5V

+

-

1.5V

1.5V

+

SCREW

+

POTS

-

RESET

adapters that use the proper polarity configu­ration.
HI9141 and HI91410 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.

WARNING: In HI91410, if the external power

supply and batteries are discon­nected, all stored data will be
erased. Always apply external
power supply to the instrument
when changing low batteries to
prevent data from being lost.

+

-

35

36

Untitled-22

37

ACCESSORIES

HI 7041S Refilling Electrolyte Solution,

HI 710005 115 VAC to 12 VDC power

HI 710006 230 VAC to 12 VDC power

HI 710034 Plain paper spare roll (10 pcs)
HI 710035 Spare ink cartridge (1 pc)
HI 721308 1.5V AA alkaline battery (10

HI 76407/10 Spare probe with 10 meters

HI 76407/20 Spare probe with 20 meters

HI 76407A/P 5 spare membranes
HI 9200 Infrared Transmitter
HI 92000/16 Windows

HI 92000/32 Windows

MANDOPRNR1 Instruction manual

30 ml

adapter

adapter

pcs)

(33') cable

(66') cable

®

software for data transfer to PC

®

95 compatible soft-

ware for data transfer to PC

3.11 compatible

38

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 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 charge for repair
or replacement.

If the instrument is to be returned to Hanna
Instruments, obtain a Return Goods Authoriza­tion from the Customer Service Department first
and then 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.

Windows® is registered Trademark of "Microsoft Co."

37

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.

38

Untitled-22

39

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 dissolved oxygen meters

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: 28-11-1995

HI 9141 HI 91410

D.Volpato - Engineering Manager

On behalf of

Hanna Instruments S.r.l.

40

PRINTED IN ITALY

MANDOPRNR1

02/96

Recommendations for Users

Before using these products, make sure that they are entirely suitable for the
environment in which they are used.

Operation of this instrument in residential area could cause unacceptable interfer­ences to radio and TV equipments, requiring the operator to take all necessary steps
to correct interferences.

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.
In particular cases the meters could turn off. In such cases, the meters can be turned

on by pressing the ON/OFF key.

37

39

http://www.hannainst.com

40