Hanna Instruments HI 91410 Instruction Manual

1

Instruction Manual

HI 9141 • HI 91410

Printing and Logging

Dissolved Oxygen Meters

ON/OFF

PAPER

FUNCTION

UP

DOWN

CAL

PRINT

LOG

MICROPROCESSOR LOGGING
DISSOLVEDOXYGEN METER

HI 91410

RANGE

O

2

0. . . 19.99ppm

www.hannainst.com

32

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, immediately notify your dealer.
Each meter is supplied complete with:

• HI 76407/4 DO probe with 4 m cable

• HI 7041S electrolyte solution (30 mL)

• Protective cap

• 2 spare membranes with O-ring

• 5 pPaper rolls

• Batteries (4 x 1.5V AA)

• Instruction manual

• 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.

Dear Customer,
Thank you for choosing a HANNA product.
Please read this instruction manual carefully

before using the instrument.
This manual will provide you with all the neces-

sary information for a correct use.
If you need additional technical support, do not

hesitate to e-mail us at [e-mail]
These instruments are in compliance with the

directives.

TABLE OF CONTENTS

Warranty ..................................................... 3

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

General Description .................................... 4

Probe Functional Description...................... 5

Functional Description HI9141 ................... 6

Functional Description HI91410.................. 7

Specifications ............................................. 8

Initial Preparation........................................ 9

Calibration................................................. 11

Taking Measurements .............................. 13

Setting Date, Time, Printing Interval ......... 15

Printing / Recording with HI9141.............. 18

Printing / Logging with HI91410 ............... 20

Altitude Compensation.............................. 2 4

Salinity Compensation.............................. 25

Temperature Compensation ...................... 25

Probe & Membrane Maintenance ............. 26

Data Transfer to PC (HI91410) ................. 28

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

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

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

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

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

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.
Probes are warranted for 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.

PRELIMINARY EXAMINATION

54

PROBE FUNCTIONAL DESCRIPTION

1. Dissolved Oxygen (DO) probe

2. Protective cap

3. Watertight shielded cable

4. Polypropylene probe body

5. Temperature sensor

6. O-Ring seal

7. AgCl (silver chloride) anode

8. Platinum cathode (sensor)

9. Oxygen permeable membrane

10. Membrane cap

3

1

4

4

5

6

2

9

8

10

7

HI 9141 and HI 91410 are portable, printing
DO meters designed for continuous monitor­ing and recording at selectable time intervals.
The low-power printer uses regular paper that
is easily sourced and will not fade over time.
HI 91410 combines all of the comprehensive
printing functions of the HI 9141, with the
capability to log measurements. In addition
to supplying the user with instant print-outs
of DO, HI 91410 also provides datalogging
facilities that will store up to 8000 readings.
These measurements can be scrolled through
at any time, printed or even transferred to a
computer system for elaboration or perma­nent storage. An optional HI 9200 infrared
transmitter can be used to take the data from
HI 91410 and send it to a computer without
any cords. Simply place the meter on the
cradle and, at the touch of a button, all of the
recorded lots are transferred in seconds. This
infrared connection is important in humid
environments, where a standard RS232 plug
on a meter could become damaged.
In addition to the automatic calibration fea­ture, both meters automatically compensate
for altitude (from 0 to 1900 meters) and salin­ity (from 0 to 40 g/L).

The dissolved oxygen probe has a membrane
covering the polarographic sensors and a built­in thermistor for temperature measurements
and compensation. This permeable 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.

GENERAL DESCRIPTION

Hanna Instruments reserves the right to modify

the design, construction and appearance of its

products without advance notice.

76

FUNCTIONAL DESCRIPTION HI91410

1. Probe and power adapter sockets

2. UP key, to set date, time, printing interval,
altitude & salinity factors

3. DOWN key, to set date, time, printing
interval, altitude & salinity factors

4. PRINT key, to print on-demand

5. LOG key, to enter/exit logging mode

6. Liquid Crystal Display (LCD)

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/exit calibration mode

ON/OFF

PAPER

FUNCTION UP

DOWN

CAL

PRINT

LOG

6

7
8

9

10

4
5

3

2

1

MICROPROCESSOR LOGGING
DISSOLVEDOXYGEN METER

HI 91410

RANGE

O20. . . 19.99ppm
°C 0. . . +50.0°C

FUNCTIONAL DESCRIPTION HI9141

1. Probe and power adapter sockets

2. UP key, to set date, time, printing inter-
val, altitude & salinity factors

3. DOWN key, to set date, time, printing
interval, altitude & salinity factors

4. PRINT key, to print on-demand

5. RECORD key, to enter recording mode

6. Liquid Crystal Display (LCD)

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 DO or
temperature mode, and for compensation
selection

10. CAL key, to enter/exit calibration mode

ON/OFF

PAPER

FUNCTION UP

DOWN

CAL

PRINT

RECORD

6

7
8

9

10

4
5

3

2

1

MICROPROCESSOR PRINTING
DISSOLVEDOXYGEN METER

HI 9141

RANGE

O20. . . 19.99ppm
°C 0. . . +50.0°C

98

Each meter is supplied complete with four

1.5V AA batteries. Remove the back cover,
unwrap the batteries and install them while
paying attention to the polarity (see "Battery
Replacement" section for details).

To prepare the instrument for use, connect
the DO probe to the meter by aligning the
pins with the socket located on the top of the
meter, pushing the plug in and tightening the
threaded ring. See the "Initial Probe Prepara­tion" procedure explained on page 10.

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.

If the probe is not connected, the meter will
display "°C ---.-", and print "---- ppm" & "---­°C" to alert the user.
This can also indicate a broken probe cable.

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

ON/OFF

SPECIFICATIONS

Range 0.00 to 19.99 ppm (mg/L) O

2

0.0 to 50.0°C

Resolution 0.01 ppm (mg/L) O

2

0.1°C

Accuracy ±1.5% FS (O2)

±0.5°C

Typical EMC Deviation

±0.6 ppm (mg/L) O2 / ±3°C

Calibration Automatic,
in saturated air, at 100%

Temperature Compensation

Automatic, 0 to 30°C (32 to 86°F)

Altitude Compensation

0 to 1900 m (resolution 100 m)

Salinity Compensation

0 to 40 g/L (resolution 1 g/L)

Probe HI 76407/4, polarographic,
with 4 m (13') cable (included)

Printer Low power impact type belt,

common 38 mm plain paper (HI 710034)

Printing/Logging (HI 91410 only) Interval

Selectable at

1, 2, 5, 10, 15, 30, 60, 120 or 180 min.

PC Connection (HI 91410 only)

RS232 port with HI 9200 transmitter

and HI 92000 software (not included)

Power Supply

4 x 1.5V AA batteries / approx. 70 hours of use;

auto-off after 4 hours of inactivity;

or 12 Vdc input

Environment 0 to 50°C (32 to 122°);

RH max 95%

Dimensions 220 x 82 x 66 mm

(8.7 x 3.2 x 2.6")

Weight 550 g (1.2 lb.)

INITIAL PREPARATION

°C

14-01-96

0009 *00.50

---- ppm

---- °C

<>

1110

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 inside 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 measured oxygen
level is both that of the tested solution as
well as that present in the electrolyte solu­tion. This reading is not correct.

The calibration procedure is very simple and
should be performed every time the meter is
turned on.

• Make sure the probe is ready for mea­surements (see page 10), i.e. the mem­brane cap is filled with electrolyte, the
probe is connected to the meter and prop­erly polarized.

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

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

ON/OFF

THEN SCREW

BACK ON

THEN TAP

FILL FIRST

INITIAL PROBE PREPARATION

All HANNA DO probes are shipped dry.
To hydrate the probe and prepare it for use,
connect it to the meter and proceed as fol­lows:

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

2. Wet the sensor by soaking
the bottom 2.5 cm (1") of the
probe in HI 7041S electrolyte
solution for 5 minutes.

3. Rinse the membrane (HI76407A supplied
with the meter) with electrolyte solution
while shaking it gently.
Refill with fresh
electrolyte.

4. Gently tap the
sides of the mem­brane cap with
your finger 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, protect the mem­brane with the supplied cap.

Shipping

cap

black

red