Hanna Instruments HI98198 Instruction Manual

INSTRUCTION MANUAL

HI98198

opdo

™

Optical dissolved oxygen meter

Thank you for choosing a Hanna Instruments product.
Please read this instruction manual carefully before using the meter.
This manual will provide you with the necessary information for correct use

of the meter, as well as a precise idea of its versatility.
If you need additional technical information, do not hesitate to e‑mail

us at [e-mail] or view our worldwide contact list at

www.hannainst.com.

Dear Customer,

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

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PRELIMINARY EXAMINATION ..............................................................................................

GENERAL DESCRIPTION ......................................................................................................

FUNCTIONAL DESCRIPTION ................................................................................................

SPECIFICATIONS ...............................................................................................................

THEORY OF OPERATION .....................................................................................................

PROBE COMPONENTS ........................................................................................................

GETTING STARTED .............................................................................................................

SETUP ..............................................................................................................................

DO CALIBRATION ............................................................................................

PRESSURE CALIBRATION.....................................................................................................

TEMPERATURE CALIBRATION...............................................................................................

GOOD LABORATORY PRACTICE (GLP) ....................................................................................

MEASUREMENT..................................................................................................................

LOGGING...........................................................................................................................

RETRIEVING DATA..............................................................................................................

OPERATIONAL GUIDE....................................................................................................

BOD MEASUREMENT..........................................................................................................

OUR MEASUREMENT .........................................................................................................

SOUR MEASUREMENT .......................................................................................................

BATTERIES REPLACEMENT...................................................................................................

PROBE MAINTENANCE........................................................................................................

TROUBLESHOOTING GUIDE.................................................................................................

ACCESSORIES.....................................................................................................................

CERTIFICATION.....................................................................................................................

RECOMMENDATIONS FOR USERS............................................................................................

WARRANTY.....................................................................................................................

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TABLE OF CONTENTS

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Remove HI98198 opdo™ meter from the packing material and examine it carefully to make sure
that no damage has occurred during shipment. If noticeable damage is evident, contact your local
Hanna Instruments office.

Each meter is supplied with:

• HI764113 Optical DO probe with built‑in temperature sensor, protective shield and 4 m (13’4) cable

• HI764113‑1 Smart Cap™ with o‑ring

• HI7040 Bicomponent Zero Oxygen Solution

• Calibration/storage vessel

• 100 mL plastic beaker (2 pcs.)

• 1 syringe with silicon grease

• 1 lens wipe

• 1.5V AA batteries (4 pcs.)

• Instruction manual

• Meter quality certificate

• Probe quality certificate

• Cap quality certificate

• USB Type A to C cable

Note: Save all packing material until you are sure that the meter functions correctly. All defective
items must be returned in the original packing with the supplied accessories.

PRELIMINARY EXAMINATION

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The HI98198 opdo™ meter is a rugged, portable dedicated dissolved oxygen (DO) meter designed
for fresh and saltwater measurements of dissolved oxygen. This professional, waterproof meter com‑
plies with IP67 standards and measures DO, barometric pressure, and temperature. The HI98198 is
supplied with a HI764113 digital optical dissolved oxygen probe in a custom thermoformed durable
carrying case with accessories. It is compact and ergonomically designed to provide ready access to
the materials required for routine sampling.

The HI98198 opdo™ meter is only compatible with the Hanna digital dissolved oxygen probe
(HI764113).

Concentration measurements are automatically compensated for barometric pressure, temperature
and salinity. Barometric pressure and temperature are automatically measured and compensated.
Salinity is automatically compensated by setting manually the salinity concentration of the water
being measured. The meter also has a built in application to measure and calculate BOD (Biological
Oxygen Demand), OUR (Oxygen uptake rate), and SOUR (Specific Oxygen Update Rate).

Other features include:

• Text messages on the graphic LCD display to warn and guide the user.

• Back lighted display.

• One or two points calibration at 0 or/and 100% saturation (with auto recognition).

• A single point manual calibration in mg/L or % saturation using a reference method for calibration
value.

• A dedicated HELP key for assistance anytime.

• A user selectable “Calibration due” warning.

• A dedicated GLP key that includes at last 5 calibrations with time, date, calibration points as well

as barometric pressure, temperature and salinity setting.

• AutoEnd freezes the next stable measurement value on the display.

• Log on demand with 4000 records capability.

• USB‑C port for easy data transfer to memory stick, PC or other compatible device.

GENERAL DESCRIPTION

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1) Liquid Crystal Display (LCD).

2) F1, F2, F3 functional keys.

3) / keys to manually increase/decrease the parameters or to scroll through the menu.

4) ON/OFF ( ) key, to turn the meter ON and OFF.

5) LIGHT ( ) key, to toggle display back‑lighting.

6) GLP key, to display Good Laboratory Practice information.

7) CAL key, to enter/exit calibration menu.

8) SETUP key, to enter/exit Setup menu.

9) RCL key, to enter/exit view logged data mode (RCL means RECALL).

10) MODE key to switch between DO, BOD, OUR and SOUR applications.

11) RANGE key, to change between % saturation or concentration in DO measurement mode.

12) HELP key to enter/exit contextual help.

13) ESC key to leave current mode, exit calibration, setup, help, etc.

14) Quick connect DIN connector.

15) USB-C connector.

16) Junction for barometric pressure sensor.

FUNCTIONAL DESCRIPTION

FRONT VIEW TOP VIEW

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HI98198 Meter with HI764113 Probe Specifications

Dissolved Oxygen

Range 0.00 to 50.00 mg/L / 0.0 to 500.0% saturation

Resolution 0.01 mg/L / 0.1% saturation

Accuracy

1.5% of reading ± 0.01mg/L for 0.00‑20.00mg/L
5% of reading for 20.00‑50.00mg/L

1.5% of reading ±0.1% for 00‑200.0%
5% of reading for 200.0‑500.0%

Barometric Pressure

Range 420 to 850 mmHg

Resolution 1 mmHg

Accuracy ±3 mmHg within ±15% from the calibration point

Temperature

Range ‑5.0 to 50.0 °C (23 to 122 °F)

Resolution 0.1 °C (0.1 °F)

Accuracy ±0.3 °C (±0.4 °F)

DO Calibration • One or two points automatic calibration at 100% (8.26 mg/L)

and 0% (0 mg/L).

• Single point manual using a value entered by the user in %
saturation or mg/L.

Temperature Calibration Single point anywhere within temperature range

Pressure Calibration Single point anywhere within pressure range

Temperature

Compensation

Automatic from ‑5.0 to 50.0 °C (23.0 to 122.0 °F)

Pressure Compensation Automatic from 420 to 850 mmHg

Salinity Compensation Automatic from 0 to 70 PSU (manually set)

DO Probe HI764113 Optical Probe

LOG On demand with 4000 records capability

Battery Type / Life

1.5V AA batteries (4 pcs.) / approx. 200 hours of continuous use
without backlight (50 hours with backlight)

Auto Power Off User selectable: 5, 10, 30, 60 minutes or disabled
PC Connectivity USB-C

Dimensions 185 x 93 x 35.2 mm (7.3 x 3.6 x 1.4”)

Meter Weight

(with batteries)

450 g (15.9 oz)

Case Ingress

Protection Rating

IP67

Environment 0 to 50 °C (32 to 122 °F) max. RH 100%

SPECIFICATIONS

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SPECIFICATIONS

HI764113 Probe Specifications

Probe body material ABS

Smart Cap™ material Polypropylene

Cable jacket material PVC

Cable length 4 m (13.1 ft.), 10 m (32.8 ft.), and 20 m (65.6 ft.) options
Probe guard 316 Stainless Steel

Temperature

Measurement

Thermistor

Pressure 20 m (29 PSI)

Probe Dimensions

(with Guard)

174 X 25 mm (6.8 X 1”)

Response Time (t95) 45 seconds

Probe Weight

(with Guard)

400 g (14.2 oz)

4 m (13.1 ft.) cable length

Probe Ingress

Protection Rating

IP68

Sensor type Optical; Luminescence Quenching

Origin Assembled in USA

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THEORY OF OPERATION

THEORY OF OPERATION

The Hanna HI764113 optical DO sensing probe is based on the principle of fluorescence quenching.
The sensing method features an immobilized Pt based luminophore that is excited by the light of a
blue LED and emits a red light. Dissolved oxygen quenches this excitation. When there is no oxygen
present, the lifetime of the signal is the greatest; as oxygen hits the sensing surface, the lifetime
becomes shorter. The intensity and lifetime are inversely proportional to the amount of oxygen present;
as oxygen interacts with the luminophore it reduces the intensity and lifetime of the luminescence. The
lifetime of the luminescence is measured by a photodetector, and is used to calculate the dissolved
oxygen concentration. This is in turn reported by the meter as a % saturation or mg/L reading of
Dissolved Oxygen.

The major components of the probe include a blue LED for excitation, a red LED that is used as a reference
light, and a photodetector. The Smart Cap™ is locked in place on the optical probe and includes the
immobilized O2 sensitive luminophore with rugged insoluble black oxygen permeable protective layer.

Over time, the sensor’s optical components can age but are compensated for by using the reference
signal to compensate the measuring path. As a result, the sensor provides accurate DO measurements
over long periods of time without the need for frequent calibration.

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PROBE COMPONENTS

1. Strain relief

2. ABS Probe body

3. Temperature Sensor

4. O‑Ring Seal

5. Optical window

6. Alignment key

7. Smart Cap™

8. RFID Tag

9. Embedded O2 sensitive luminophore with black protective layer

10. Protective shield

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GETTING STARTED

1. Remove the HI764113 from the carrying case. Remove stainless steel guard
from probe body if it was installed. Use care not to leave fingerprints on the
optical window.

2. Sparingly lubricate the O‑ring with a thin film of silicone grease. Use care
to prevent grease from contacting the optical window.

3. Remove the HI764113‑1 optical cap from the container. Align the notched
cutout arrow on the Smart Cap™ with the matching guide on the probe
body.

4. Slide and press the Smart Cap™ onto the HI764113 body until
the cap snaps in place. Once the cap is installed, it should not
be removed unless a new cap is required.

5. Connect the HI764113 probe to the HI98198 meter by plugging
the DIN connector to the socket located on the top of the meter.

6. Power the meter to initiate the cap timer.

Note: Turn off the meter before connecting or disconnecting

the probe.

INITIAL PREPARATION

Install the supplied batteries into the meter. See Batteries Replacement for details, page 52.
To prepare the meter for field measurements close the USB communication socket with the attached

stopper.
Turn the meter ON by pressing ON/OFF key.
At start‑up the meter will show the Hanna Instruments logo for a few seconds, followed by the

percentage indication of the remaining battery life.
Before connecting the probe for the first time, press SETUP and using / arrows navigate to

Date/Time. Press Modify and set the current date and time.

Note: Verify time and date are properly set on meter prior
to probe initialization.

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GETTING STARTED

“No Probe” message is displayed on meter if the probe connector is not plugged in properly.
The “No cap info detected. Install the cap and press Continue.“ message on the meter indicates

that the Smart Cap™ is missing or not properly installed on the probe.
No conditioning period is required when using a HI764113 DO probe.
Store the HI764113 probe in the HI98198 carrying case when not in use.
For frequent use and short term storage it is recommended to remove the stainless steel guard and

replace with the storage vessel that has a small amount of deionized water. The probe can also be
stored with the stainless steel guard on in a beaker containing deionized water.

For longer term storage, remove the stainless steel guard and replace with the storage vessel.

A probe info screen will be displayed momentarily before defaulting to the measurement screen:

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SETUP

Setup menu allows viewing and modifying the measurement parameters.
The following table lists the Setup parameters, their valid range and the factory default settings.

Item Description Valid value Default

Log Separator Log file column separator Comma, Semicolon Comma
Salinity The solution’s salt content 0 to 70 PSU 0 PSU
Manual Pressure Used to manually set the pressure

and disable the automatic
barometer measurement

Enabled or disabled Disabled

Pressure Unit mmHg, inHg, atm,

mbar, psi, kPa

mmHg

Temperature Unit °C or °F ° C
Calibration Timeout Calibration due timer Disabled, 10 to 70 days Disabled

BOD Configuration

Sample min delta DO

Sample min end DO
Seed min delta DO

Seed min end DO

The minimum diff. between the start
and the end DO val.
The minimum end DO value
The minimum diff. between the start
and the end DO val.
The minimum end DO value

0.00 to 50.00 mg/L

0.00 to 50.00 mg/L

0.00 to 50.00 mg/L

0.00 to 50.00 mg/L

0.00 mg/L

0.00 mg/L

0.00 mg/L

0.00 mg/L

OUR Configuration

Min time
Max time
Min start DO

Min end DO

Total volume

Sample volume

The minimum time for the OUR test
The maximum time for the OUR test
The minimum DO value for starting
the OUR test
The minimum DO value at the end
of the OUR test
The total volume of the solution to
be tested
The volume of sample in the
solution to be tested

1 to 3600s
1 to 3600s

0.01 to 50.00 mg/L

0.00 to 50.00 mg/L

0.1 to 300.0 mL

0.1 to 300.0 mL

1s

3600s

0.01 mg/L

0.00 mg/L

0.1 mL

0.1 mL

SOUR configuration

Min time
Max time
Min start DO

The minimum time for the SOUR test
The maximum time for the SOUR test
The minimum DO value for starting
the SOUR test

1 to 3600s
1 to 3600s

0.01 to 50.00 mg/L

1s

3600s

0.01 mg/L

SETUP

Item Description Valid value Default

Min end DO

Total volume

Sample volume

Solids weight

SOUR @ 20 °C

The minimum DO value at the end
of the test
The total volume of the solution to
be tested
The volume of sample in the
solution to be tested
Total solids or Volatile Suspended
solids weight
Correct the SOUR value to 20 °C

0.00 to 50.00 mg/L

0.1 to 300.0 mL

0.1 to 300.0 mL

0.1 to 300.0 g/L

Enabled or Disabled

0.00 mg/L

0.1 mL

0.1 mL

0.1 g/L

Disabled

Autodelete BOD
start data

Automatically delete BOD start
data, after BOD compute

Enabled or Disabled Disabled

Backlight Backlight Level 1 to 7 4
Contrast Contrast Level 0 to 20 10
Auto Light OFF Time backlight remains ON 1, 5, 10, 30 minutes 1
Auto Power OFF Time until meter is powered OFF Disabled or 5, 10, 30, 60

minutes

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Date / Time 01.01.2006 to

12.31.2099
00 :00 to 23 :59

current

date/ time

Time Format AM/PM or 24 hours 24 hours
Date Format DD / MM / YYYY

MM / DD / YYYY
YYYY / MM / DD
YYYY / MM / DD
YYYY ‑ MM ‑ DD
Mon DD, YYYY
DD ‑ Mon ‑ YYYY
YYYY‑Mon‑DD

YYYY/MM/

DD

Language Message display language Up to 3 languages English
Beep ON Beeper Status Enabled or Disabled Disabled
Instrument ID Meter identification 0000 to 9999 0000
Meter Info Displays general information
Probe Info Displays probe and cap information

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SETUP

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SETUP

PARAMETER SCREENS

Log Separator

Log separator or CSV file separator is a special character used to separate columns in the CSV log
file. There are two options available: Comma (,) or Semicolon (;). The field separator depends upon
regional preferences.

Press the function key to modify the CSV file separator.

SETUP

Salinity

Dissolved oxygen solubility decreases if water contains salts. This parameter is used to compensate
concentration measurements (mg/L) made in brackish or sea water samples. The salinity is expressed in
PSU scale and is manually entered by the user. The DO concentration will be automatically compensated
to improve the accuracy during calibration and measurement. Enter the salinity value to be close to
the known salt level of the sample. Seawater typically has a salinity of 35 and the oxygen solubility
is 18% less as compared to fresh water at 25 °C. By entering the approximate salinity value, the
calibration and subsequent concentration measurement will be compensated to display the correct
oxygen concentration. An 18% error would result if the salinity value is not entered.

Highlight Salinity.
Press Modify.

Use / keys to change the salinity value. Press Accept to confirm or ESC to exit without saving.

SETUP

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Pressure Unit

The HI98198 has the ability to convert and display pressure measurements in user selected units.
Automatic and Manual Pressure will utilize these units.

To change the pressure measurement unit highlight Pressure unit and press Modify.

Using / keys highlight the desired pressure measurement unit.

Press Accept to confirm or ESC to exit without saving.

Manual Pressure

The HI98198 has a built in barometer for automatic compensation of ambient pressure for oxygen
measurement. The user may enable Manual Pressure to disregard the barometer measurement and
manually enter a pressure value which will be used for oxygen measurements. Once enabled, pressure
values are entered from the measurement screen using the / keys.

Highlight Manual pressure.
Press the displayed functional key to enable or disable the feature.

SETUP

SETUP

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Temperature Unit

The HI98198 has the ability to convert and display temperature measurements in degree Celsius or
Fahrenheit.

Highlight Temperature Unit.
To change the temperature unit, press the displayed functional key.

SETUP

SETUP

Calibration Timeout

The HI764113 dissolved oxygen probe utilizes optical technology which offers significant advantages
over polarographic or galvanic type dissolved oxygen probes. Some advantages include reduced
maintenance, simplified handling and infrequent calibrations. However if a user wishes to validate
or calibrate on a SOP schedule, a timer may be set as a reminder.

The Calibration time out parameter can be set from 10 to 70 days or can be disabled.
The meter is provided with a real time clock (RTC) and is used to monitor the time elapsed since the

last DO calibration.
The calibration timer is reset every time the meter is calibrated and the “CAL DUE” status is triggered

when the meter detects a calibration time out. The “CAL DUE” tags will start blinking to warn the
user that the meter should be recalibrated.

If the calibration timeout is changed (e.g. to 20 days), then the timer will be immediately reset.

Notes:

- Before the DO calibration is cleared (default values loaded) the display always shows the
“CAL DUE”.

- Before an abnormal condition in the RTC is detected, the meter forces the “CAL DUE”
status.

- After a user temperature or pressure calibration is made (or cleared), the “CAL DUE”
message will be activated.

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BOD Configuration

When making BOD measurements, the BOD method configuration parameters must be filled in.
These parameters will be used to flag error limits for the determination. Ignore this parameter if not
making BOD measurements.

Highlight BOD configuration.
Press Select.

SETUP

SETUP

Press SETUP key.
Highlight Calibration timeout.

Press Modify.
Use the / keys to set the desired value.
Press Accept to confirm or ESC to return without saving.

Note: If enabled, a ”CAL DUE” warning will be shown on the display after the Calibration
timeout period has expired.

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OUR Configuration

The OUR method configuration allows the user to set the parameters related to the OUR measurement.
OUR is used to determine the oxygen consumption or respiration rate. It is defined as the mg/L of

oxygen consumed per hour.
These parameters will be used to flag error limits and make dilution calculations for the determination.
Ignore this parameter if not making OUR measurements.
Highlight OUR configuration and press Select.

SETUP

SETUP

Press / keys to modify the selected parameter’s value.
Press Prev/Next to select a different parameter.
Press Save to save the new BOD configuration.
Press ESC to leave without changing.

Parameters:

• Sample min ∆ DO ‑ the minimum acceptable difference between the initial and final DO values

for a sample. If the difference is less than this value the meter will show a warning message when
evaluating the BOD.

Range: 0.00 to 50.00 mg/L.

• Sample min end DO ‑ the minimum acceptable final DO value for a sample. If the final DO value
is less than this value the meter will show a warning message when evaluating the BOD.

Range: 0.00 to 50.00 mg/L.

• Seed min ∆ DO ‑ the minimum acceptable difference between the initial and final DO values
for a seed sample. If the difference is less than this value the meter will show a warning message
when evaluating the BOD.

Range: 0.00 to 50.00 mg/L.

• Seed min end DO ‑ the minimum acceptable final DO value is less than this value the meter will
show a warning message when evaluating the BOD.

Range: 0.00 to 50.00 mg/L.

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SOUR Configuration

Specific Oxygen Uptake Rate (SOUR), also known as the oxygen consumption or respiration rate, is
defined as the milligram of oxygen consumed per gram of volatile suspended solids (VSS) per hour.
These parameters will be used to flag error limits and make dilution calculations for the determination.
Ignore this parameter if not making SOUR measurements.
Highlight SOUR configuration and press Select.

SETUP

SETUP

Press / keys to modify the selected parameter’s value.
Press Prev/Next to select a different parameter.
Press Save to save the new OUR configuration.
Press ESC to leave without changing.

Parameters:

• Min time ‑ the minimum time for the OUR test.

Range: 1 to 3600 seconds.

• Max time ‑ the maximum time for the OUR test. The test will stop automatically when the maximum
time has elapsed.

Range: 1 to 3600 seconds.

• Min start DO ‑ the minimum accepted DO value for starting the OUR test. If the DO reading is
less than this value the test cannot be started.

Range: 0.01 to 50.00 mg/L.

• Min end DO ‑ the minimum accepted DO value at the end of the test. If the DO reading at the
end of the OUR test is less than this value a warning message will be displayed.

Range: 0.00 to 50.00 mg/L.

• Total volume ‑ the volume of the diluted mixture.

Range: 0.1 to 300.0 mL

• Sample volume ‑ the volume of sample in the diluted mixture.

Range: 0.1 to 300.0 mL.

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Autodelete BOD start data

Highlight Autodelete BOD start data.

Press the displayed functional key to enable/disable the feature.
If enabled the BOD initial data record used in BOD result evaluation is deleted automatically after the

BOD result has been saved into the meter’s memory (LOG key pressed).
If disabled, the user has to delete BOD initial data records that were used in BOD result evaluation,

entering View initial BOD data mode.

Press / keys to modify the selected parameter’s value.
Press Prev/Next to select a different parameter.
Press Save to save the new SOUR configuration.
Press ESC to leave without changing.

• Min time ‑ the minimum time for the SOUR test.

Range: 1 to 3600 seconds.

• Max time ‑ the maximum time for the SOUR test. The test will stop automatically when the
maximum time has elapsed.

Range: 1 to 3600 seconds.

• Min start DO ‑ the minimum accepted DO value for starting the SOUR test. If the DO reading is
less than this value the test cannot be started.

Range: 0.01 to 50.00 mg/L.

• Min end DO ‑ the minimum accepted DO value at the end of the test. If the DO reading at the
end of the SOUR test is less than this value a warning message will be displayed.

Range: 0.00 to 50.00 mg/L.

• Total volume ‑ the volume of the diluted mixture.

Range: 0.1 to 300.0 mL

• Sample volume ‑ the volume of sample in the diluted mixture.

Range: 0.1 to 300.0 mL.

• Solids weight: Total solids or Volatile suspended solids weight.

Range: 0.1 to 300.0 g/L.

• SOUR @ 20°C: If this option to enabled the SOUR value is corrected to 20 °C.

SETUP

SETUP

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Contrast

The display contrast ratio adjusts the ratio of light areas to dark areas to improve readability in
various environments.

To adjust the contrast, highlight Contrast and press Modify.

Use ←/→ keys to change intensity, then press Accept to confirm.

Press ESC to leave without changing.

SETUP

Backlight

The display backlight can be adjusted to increase visibility in various lighting environments.
To adjust the backlight, highlight Backlight and press Modify.

Use ←/→ keys to change intensity, then press Accept to confirm.

Press ESC to leave without changing.

SETUP

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Auto Light OFF

The backlight must be manually enabled by pressing the light bulb key on the keypad. When the
selected time has expired, back lighting turns off automatically.

To change the duration, highlight Auto Light OFF than press the desired functional key to change
the option.

The backlight display setting should be set to the shortest time to preserve the battery life.

Auto Power OFF

This selection can be used to preserve the battery life in the event that the meter is accidentally left on.

Highlight Auto Power OFF.
Press Modify.

Use / keys to select interval, then press Accept.

Press ESC to leave without changing.

SETUP

SETUP

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Time Format

Your desired time format may be selected in this parameter. Highlight Time Format from Setup menu.
Select between AM/PM or 24 hours.

Press functional key to change the option.

Date Format

Your desired date format may be selected in this parameter. Highlight Date Format from Setup
menu and press Modify.

Highlight desired date format using / keys then press Accept.
Press ESC to leave without changing.

SETUP

SETUP

Date / Time

This parameter should be configured to the current date and time prior to connecting a HI764113
probe for the first time.

To set the time and / or date, from the Setup menu, highlight Date / Time, then press Modify.

Use ←/→ keys to select item. Use / keys to change the emphasized values.

Press Accept to confirm the new settings, or ESC to leave without changing.

25

Instrument ID

This parameter allows the user to set a four digit code to easily identify the meter.

Press Modify, then use / keys to change the meter’s ID. Press Accept to confirm or ESC to exit
without saving.

Beep On

This option allows the user to turn an acoustic warning signal on or off. If enabled, a short tone
will occur to signal a condition is correct (key press, calibration) or a long tone will occur when an
incorrect key is pressed.

Disabling will silence audible signals.

Language

This option allows the user to choose the desired language in which all information will be displayed.
To modify the language, highlight Language from the Setup menu and press the desired virtual key

to make selection.

SETUP

SETUP

26

Probe Info

This parameter displays probe and Smart Cap™ information.
Press Select to view cap information.

Press Next to view the Cap information.

Press Prev to return to first screen.
Press ESC to return to Setup.
Press ESC two times to return to Measurement.

Meter Info

This parameter captures the firmware version, language version, pressure calibration date, meter serial
number as well as the battery capacity.

Highlight the Meter Info then press Select.

SETUP

SETUP

27

There are three calibration functions and procedures that can be accessed through the CAL button.
These are calibration of the probe (DO), calibration of the barometer (Pressure) and calibration of the
temperature (Temp). Prepare the dissolved oxygen probe according to the instructions from GETTING
STARTED (page 11).
No conditioning period is required when using a HI764113 DO probe.
Store the HI764113 probe in the HI98198 carrying case when not in use. For short term storage the
probe can also be stored in a beaker of deionized water or in storage cap (when shield is removed).

DO CALIBRATION

General Calibration Guidelines:

1. Before calibration, rinse the probe with clean water to remove debris from the probe body; wipe
with a lint free cloth.

2. Remove the protective shield and set aside.

3. Inspect. Visually inspect the Smart Cap™ for biofouling. If necessary, use a mild detergent and a soft bristled

toothbrush to clean the probe and Smart Cap™. A scratch in the black protective layer on the Smart Cap™
will affect the calibration (and measurement). Replace the Smart Cap™ if the sensing surface has been
compromised.

4. Rinse the cap with water after cleaning and dry with a laboratory tissue.

5. Discard zero oxygen solution in an appropriate manner after use (do not return to bottle). Follow
local disposal regulations.

6. Confirm all water droplets have been removed from the cap surface as well as the temperature
element before performing the calibration procedure in water saturated air.

Calibration of the HI764113 optical dissolved oxygen probe may be performed several different ways:

• Single point automatic zero calibration at 0% saturation or 0 mg/L

• Single point automatic slope calibration at 100% saturation or 8.26 mg/L

• Two points automatic calibration at 0% saturation (0 mg/L) and 100% saturation (8.26 mg/L)

• Single point manual calibration using a standard value set by the user in % saturation or mg/L.

Any 0% (or mg/L) calibration is made exposing the probe to an environment with the absence of
oxygen (such as Hanna HI7040 solution), a nitrogen sparging, or other oxygen scavengers.
A 100% calibration is best made in water saturated air, however air‑saturated water is also acceptable.
A single point manual calibration may be made by comparing the displayed value to a determination
made by a reference method (such as the Winkler titration), or a reference probe in the same sample.

Notes: Temperature and Pressure calibration (if required) should be made prior to the probe
calibration. Before attempting the calibration, the probe and standards must be prepared.
Remove the protective guard from the probe.

CALIBRATION

CALIBRATION

28

CALIBRATION

Calibrating the probe over a large water surface, such as a lake or aeration basin used in wastewater
treatment should also suffice.
Air‑saturated water can be produced by bubbling air into a water sample for a prolonged period. The
point at which the water is completely saturated is difficult to estimate so there is a risk of under or
over saturation (if the temperature changes).

Single point automatic zero calibration

Submerge the probe into HI7040 zero oxygen solution and stir gently for 2‑3 minutes. Wait for the
temperature and probe values to become stable.
Press CAL. The calibration menu will be displayed.

Press DO to select the DO calibration. The meter will automatically recognize the 0% standard.

CALIBRATION

For 100% calibration, water‑saturated air is the simplest method (and recommended method). It involves
suspending the probe over a contained surface of water or moistened absorbent material. The temperature
element should also be inside the container. Under equilibrium conditions, the partial pressure of oxygen
in air‑saturated water is equal to the partial pressure of oxygen in water‑saturated air; a probe calibrated
in water‑saturated air will correctly read the partial pressure of oxygen in water samples.

Note: performing the calibration in dry air will introduce an error because reference compensations
are based on air containing 100% relative humidity.

Place a moistened sponge into the bottom of the Hanna storage/calibration vessel, or place
deionized water into the bottom of the small bottle or flask, then suspend the probe into the vessel.
Warning: DO NOT tighten the calibration vessel on the probe thread as the water vapor will become
pressurized. If using water, verify the probe Smart Cap™ has not been moistened. Wait a minimum
of 15 minutes for the air to become saturated with water vapor.

29

CALIBRATION

Single point automatic slope calibration at 100%

Suspend the probe into the water saturated air container and wait for the probe and sample to reach
thermal equilibrium.
Press CAL. The calibration menu will be displayed.

Press DO to select the DO calibration. The meter will automatically recognize the 100% saturated
standard (or equivalent mg/L).

The DO calibration screen will be displayed and the standard 100% saturation (or 8.26 mg/L,
depending on the currently selected measuring unit), will be automatically displayed.
When the reading is stable within the acceptable range, the CFM functional key is displayed.
Press CFM to confirm the calibration point.

CALIBRATION

The DO calibration screen will be displayed and the standard 0% saturation (or 0 mg/L, depending
on the currently selected measuring unit), will be automatically selected.
When the reading is stable within the acceptable range, the CFM functional key is displayed.
Press CFM to confirm the calibration point.

Press ESC to leave calibration or continue for a two point calibration.
The probe must be rinsed thoroughly with purified water to remove all traces of the zero calibration
solution.

30

CALIBRATION

Two points automatic calibration at 0% saturation (0 mg/L) and 100% saturation (8.26 mg/L)

Note: if performing the two point calibration, the 0 point must be done first.

Submerge the probe into HI7040 zero oxygen solution and stir gently for 2‑3 minutes.
Press CAL. The calibration menu will be displayed. Wait for the temperature and probe values to

become stable.

Press DO to select the DO calibration. The meter will automatically recognize the 0 standard.
The DO calibration screen will be displayed and the standard 0% saturation (or 0 mg/L, depending
on the currently selected measuring unit), will be automatically selected.
When the reading is stable within the acceptable range, the CFM functional key is displayed.

Press CFM to confirm the calibration point.
Remove probe from the standard and rinse it off completely in running water to remove all traces of
zero standard. Blot any water off the cap with a lint free tissue.
Suspend the probe into the water saturated air container and wait for the probe and sample to reach
thermal equilibrium.
The meter will automatically recognize the 100% saturated standard (or equivalent mg/L).
The standard 100% saturation (or 8.26 mg/L), will be automatically displayed.

When the reading is stable within the acceptable range, the CFM functional key is displayed.
Press CFM to confirm the calibration point. The meter will return to the measurement screen and the
probe will store the calibration data.

CALIBRATION

31

CALIBRATION

Single point manual calibration

Determine the dissolved oxygen value of the sample using a reference method such as the Winkler titration.
Place the HI764113 probe in a sample, lake, basin, stream etc. that a recent dissolved oxygen
determination has been made. The probe should be at thermal equilibrium with the sample.
Press CAL. The calibration menu will be displayed.

Press DO to select the DO calibration.

Press the Manual functional key.

Using the / keys, adjust the standard value to the value determined previously.

When the reading is stable, the CFM functional key is displayed.
Press CFM to confirm the calibration point. The meter will return to the measurement screen and the
probe will store the calibration data.

CALIBRATION

32

Pressure calibration

The HI98198 meter incorporates a pressure transducer that accurately tracks local barometric pressure.
Oxygen partial pressure is influenced by the local barometric pressure as dictated by Henry's Law.
The HI98198 automatically compensates dissolved oxygen measurements for these changes.
The HI98198’s pressure transducer is factory calibrated and no user calibration should be necessary.
If the pressure reading appears out of tolerance, the pressure reading can be checked and a calibration
performed if required. To calibrate pressure follow the instructions below. A reference barometer with
at least 1 mmHg resolution is required.
Press CAL from any measure mode (DO, BOD, OUR or SOUR). The calibration menu will be displayed.

Press Pressure functional key to select the pressure calibration. The pressure calibration screen will
be displayed.

Using the / keys, enter the true local barometric pressure reading from the reference barometer.
DO NOT use the pressure reported by the weather bureau. Weather bureaus correct pressures to sea
level.
When the reading is stable within range of the entered barometric pressure the CFM functional key
is displayed.

Press CFM to confirm the calibration.
The meter will return to the measurement screen and will store the calibration data.
”CAL DUE” will be displayed and a probe calibration must follow.

CALIBRATION

CALIBRATION

33

To clear the pressure calibration and restore the factory one, press CAL from any measure mode (DO,
BOD, OUR or SOUR).
The calibration menu will be displayed. Press the Pressure functional key and then Clear.
The user calibration will be removed and the factory calibration restored.
Press ESC key at any time to exit the calibration without changing values.

CALIBRATION

Temperature calibration

The HI764113 has been factory calibrated for temperature. Dissolved oxygen values are based upon
temperature compensation so accurate temperature measurements are required. Should a thermistor
go out of tolerance, your measurement will be compromised. An additional user temperature calibration
of the HI764113 optical dissolved oxygen probe may be performed if desired.
The probe has a built‑in temperature sensor and the thermal transfer is made via the stainless steel
contact located on the probe body. The contact point must be fully immersed in solution and in thermal
equilibrium with the solution measured during calibration. The greater the difference between the
temperatures at which the probe was stored and the temperature of the sample, the longer it will take
to reach thermal equilibrium. When the probe is connected to the meter and the meter is powered,
the temperature is displayed. Observe when temperature is stable before conducting a temperature
calibration. A reference thermometer with 0.1 °C (or better) accuracy is suggested.

Note: Calibration data for temperature is stored in the probe memory.

Procedure:

Remove the protective shield from probe. Place HI764113 probe and the reference thermometer into
a stirred container of water. Ensure the temperature contact on the probe is submerged in the water.
Observe the temperature on display until it stops changing (this may take several minutes).
Press CAL from any measure mode (DO, BOD, OUR or SOUR). The calibration menu will be displayed.

Press the Temp functional key to select the temperature calibration.

CALIBRATION

34

CALIBRATION

Use the / keys to set the calibration point values to that of the reference thermometer. When
available, CFM will appear on the display.
Press CFM to complete the calibration.

To clear the user temperature calibration at any time, press CAL from any measure mode (DO, BOD,
OUR or SOUR). The calibration menu will be displayed. Press the Temp functional key then Clear.
The previous user calibration has been removed and the factory calibration restored.
Press ESC button at any time to escape from the calibration without changing values.
”CAL DUE” will be displayed and a probe calibration must follow.

CALIBRATION

35

GOOD LABORATORY PRACTICE (GLP)

GLP is a set of functions that allows storage and retrieval of data regarding the calibration of the
DO probe.

All data regarding DO calibration is stored for the user to review when necessary.

Last DO calibration data

Data from the last 5 DO calibrations are stored automatically after a successful calibration. To view
the last calibration data, press GLP when the meter is in the DO, BOD, OUR or SOUR measurement
mode. The last calibration will appear at the top of the list.

The meter will display GLP data related to the calibration including calibration standards, salinity,
pressure and temperature.

Use to scroll through previous calibration records. A total of five calibrations are stored for reference.

GOOD LABORATORY PRACTICE (GLP)

36

MEASUREMENT

MEASUREMENT

Measurements can be made simply and quickly with a calibrated HI764113 and HI98198.
The AutoEnd key can freeze data with a single touch, and the measurement units changed by pressing
the Range key.
Power the opdo™ meter with the probe connected. After initialization, the meter enters in measurement
mode. Place the probe in the sample to be measured and allow it to reach thermal equilibrium with
the sample.
Direct measurements of dissolved oxygen (as % saturation or mg/L), temperature and atmospheric
pressure are shown on the opdo™ meter display.

Range Key

Pressing the RANGE key while in measurement toggles the measurement between a percent satura‑
tion or concentration (mg/L) measurement. The concentration measurement is calculated for oxygen
dissolved in water and is based upon air saturated water. If measuring other fluids (not water), the
mg/L measurements will be in error. In those cases the % saturated reading should be used.

AutoEnd

AutoEnd allows the user to display a measurement with a hold function. This is useful when you
are taking a measurement in a location where it might be difficult to write down the measurement.
Pressing AutoEnd will suspend the reading on the display until it is cleared.

To suspend a stable reading on the display press AutoEnd while the meter is in DO measurement.
The “Wait” symbol will blink until the reading is stable.

When the reading is stable “Hold” indicator will be displayed.

Press Continue to resume live readings.

MEASUREMENT

37

LOGGING THE CURRENT DATA

To log the current measurement press the LOG key.

The meter will display for a couple of seconds the record number and the amount of free space (in %).
If the maximum number of stored measurements is achieved, the “Log space is full” message will

be displayed for a few seconds when LOG key is pressed.

Enter RCL mode and delete records in order to free log space.

LOGGING

Mode Key

Repetitive presses of the MODE key changes the direct measurement into one of three available
dissolved oxygen applications: BOD, OUR, and SOUR. See page 41 for BOD, page 46 for OUR, and
page 49 for SOUR for application specifics.

This feature allows the user to log DO, BOD,OUR and SOUR measurements. All logged data can be
transfered to a PC using the USB Type C port.

Transfer is simple as the computer recognizes the USB connection. A spreadsheet program such as
Excel makes integration of the computer with the meter simple.

The maximum number of records is 4000.

LOGGING

MEASUREMENT LOGGING

37

38

The list of records is displayed in the range it was measured (% sat. or mg/L).
Use / to select the desired record.

Press Delete All to enter Delete All screen. Press CFM to clear all logged records.

Press Delete to enter Delete the selected screen. Press CFM to delete record.

Press More to view more information of the selected record.
Press Pg Down to see additional information.

To export data to an USB drive or PC, see the next sections.

If there is no logged data, the meter will display “No Records”.

LOGGING

VIEW LOGGED DATA

Press RCL to retrieve the stored data while in the measurement mode (DO).

LOGGING

39

DO recall:

RETRIEVING DATA

LOGGING

METER TO PC

Logged data on opdo™ can be transferred from the meter to a PC by following these simple directions.
Suitable operating systems include Windows (XP or newer), OS X or Linux.

1. Connect opdo™ to the PC using the supplied USB‑A to USB‑C cable.

2. Turn on opdo™.

3. The meter will display “Connected to HOST”

The PC should detect the USB as a removable drive. Open the drive to view the stored files. Log
files are formatted as Comma separated values (*.CSV) and can be opened with any text editor or
spreadsheet program.

(Note: Field separator may be set as comma or semicolon depending upon region preferences,
see SETUP.)

Note:

1. Western Europe (ISO-88859-1) character set and English language are suggested settings.

2. Other files may be visible depending upon computer settings. All files stored will appear
in this folder.

3. Adjust Font or column width appropriately.

RETRIEVING DATA

40

RETRIEVING DATA

LOGGING

METER TO USB DRIVE

The logged data can be transfered from the meter to a USB Flash Drive. In order to transfer all the
logged data onto a USB Flash Drive insert USB‑C into opening on the top of meter. Press the RCL key
and using / keys highlight any log.

Press the More function key then press Export.

If the file is already saved on the flash drive, opdo™ will ask for confirmation of overwriting the existing
file. The message “FILE EXISTS! OVERWRITE?”.

Press CFM for overwriting the existing file.

Note: Do not remove the USB Flash Drive during the file transfer.

If the USB is not found the following screen will appear.

Try reseating USB drive and pressing Export again.

41

DO MEASUREMENT BOD MEASUREMENT

DISSOLVED OXYGEN MEASUREMENTS:

1. Select measurement units of convenience. Press SETUP to change temperature or pressure mea‑
surement units (see page 16 and 17).

2. Press RANGE to access the preferred measurement units; mg/L or % saturation.

3. Routinely Inspect probe for biofouling. Routinely clean off the probe with clean water (between
measurements). Biologically active waters may require more frequent cleanings. Ensure weeds,
debris, or other materials are not coating the protective guard as this will block sample circulation
preventing sample from reaching the active measurement surface.

4. Verify pressure and temperature measurements are reading correctly and that the probe has been
calibrated in accordance with sampling protocols.

5. When measuring across a temperature gradient, (i.e. the car is hot and the waters cool), allow the
probe to come thermal equilibrium with the water being sampled.

6. The HI98198 with HI764113 have been designed for dissolved oxygen water quality measurements
in urban and natural waters. It may be used for discrete spot sampling using the meters Log on
Demand function. The maximum depth rating for the probe is 20 m and should be adhered to.

7. Select a water sampling site that will have a representative sampling. Position the probe if possible,
facing flow to minimize bubble collection or fluid cavitation. The probe should be measuring the
partial pressure of the dissolved oxygen in water. Gas bubbles have a greater partial pressure due to
the surface tension of the bubble. Noisy or erratic measurement or higher measurements are possible.

OPERATIONAL GUIDE

BOD MEASUREMENTS

Biochemical oxygen demand (BOD) is an indicator for the concentration of biodegradable organic
matter present in a sample of water. It can be used to infer the general quality of the water and its
degree of pollution. BOD measures the rate of oxygen uptake by microorganisms in a sample of water
at a fixed temperature and over a given period of time. To ensure that all other conditions are equal, a
very small amount of microorganism seed is added to each sample being tested. This seed is typically
generated by diluting activated sludge with deionized water. The samples are kept at 20 °C in the
dark and tested for dissolved oxygen (DO) after five days. The loss of dissolved oxygen in the sample,
once corrections have been made for the degree of dilution, is called the BOD5.
Before measuring BOD, remember to set the BOD configuration from the Setup menu (see page 18).

BOD PROCEDURE

DAY 0 (CAL DO)

Go to Setup and configure BOD configuration parameter which sets up expected sample and seed
concentrations.

Determine if you wish to save all BOD data or automatically delete starting data. Go to Setup and
configure Autodelete BOD start data.

42

Press MODE to access the BOD measurement screen.

Press BOD Data. The following screen will open. Place the probe into the BOD sample and allow the
measurement to stabilize. The sample should be well mixed. Follow all standard operating procedures.

Press Add new. The following screen will open and all parameters have to be filled out.

BOD MEASUREMENT

BOD MEASUREMENT

BOD Parameters:

• Bottle ID: a number used to identify a specific bottle.

Range: 0000 to 9999.

• The type of the Sample: Sample or Seed.

• Bottle Volume: the total volume of the BOD bottle.

Range: 0.1 to 300.0 mL.

• Sample Volume: the volume of sample in the BOD bottle.

Range: 0.1 to 300.0 mL (for a seed sample this value is 0.0 mL and cannot be set).

• Seed Volume: the volume of seed in the BOD bottle.

Range: 0.0 to 300.0 mL.
Press Prev/Next to select a different parameter on the screen.
Press / keys to modify the selected parameter’s value.
Press Save to save the BOD parameters and the initial DO, temperature, pressure and salinity values for the

specified bottle. If a bottle with the same ID already exists, the meter will ask for replacement confirmation.
Press Replace to replace the existing record, or ESC to return to the previous screen without replacing.

43

BOD MEASUREMENT

When a new record is saved the meter will display a message indicating the remaining free BOD
initial data space in %.

Repeat procedure with additional samples: Rinse off probe between samples. Place the probe into
the BOD sample and allow the measurement to stabilize. The sample should be well mixed. Follow
all standard operating procedures.

Press Add new and complete BOD Parameters screen (see above). Press Save log initial data from this sample.

BOD MEASUREMENT

Prepare all sample bottles for incubation.
Remove probe from sample and fill and cover to prepare bottle for incubation.
Rinse probe off with purified water. If desired, move probe to next sample. Press and repeat this

procedure on additional samples and Seed samples.
At the conclusion of Day 0 the probe should be cleaned and stored and all samples should be incubated

following Operational Procedures.

Day 5 (Final DO)

Remove samples and Seed samples from the incubator for analysis.
Press MODE to display BOD. Press CAL then DO to calibrate the DO probe.
Place cleaned and dry probe in sample to be evaluated.

Press Compute. The list of the Day 0 samples and seeds will be present. Use the / keys to scroll the
list of BOD initial data records. The seed records will have the symbol “*” displayed after the bottle ID.

Press More to view detailed information for the selected record.

44

BOD MEASUREMENT

Select the Bottle ID that is currently being measured by the probe and press EvalBOD.

The BOD will be calibrated.

Press RCL while in the BOD application.

BOD recall:

Note: “S.C. “ message in the title bar means seed corrected.
“not S.C.” message in the title bar means seed not corrected.

The Correct functional key will be displayed if the BOD result was not seed corrected.

Note: For a seed corrected sample, the last page will show the Seed bottle ID used for correction.

To export to PC

Connect cable to PC and meter while in BOD mode. Meter will display “Connected to Host”.
A CSV file will appear on PC with BOD data.

To export to USB drive

While in BOD mode press RCL. Press More. Place the USB into the meter and press Export key.
A BOD CSV file will be exported to USB drive.

45

BOD MEASUREMENT

BOD MEASUREMENT

Seed Correction

In case that the BOD was evaluated for a seeded sample and the list of the saved seed BOD values
is not empty, the Correct functional key will be displayed.
Press Correct to view the list of the saved seed BOD values.
Select the desired seed BOD and then press Correct to compute the corrected BOD value. The meter
will display the corrected BOD value.

If the information about the BOD of a certain seed doesn’t exist at the moment of the BOD evaluation
for a seeded sample, the sample’s BOD can be corrected at a later time from the BOD recall menu
(view logged BOD data).

In order to perform a seed correction from the BOD recall, press RCL key from the BOD measurement
screen to enter BOD recall, select the desired BOD record and press More. The meter will display a
complete set of information about the selected record.
Press Correct to view the list of the seed values.
Select the desired seed BOD and then press Correct to compute the corrected BOD value. The new
BOD value will be displayed.
The BOD results with SEED correction will be displayed. Press LOG to save and replace the previous
sample with this bottle ID or press to keep the previous sample BOD with no seed correction.
Clean the probe off thoroughly between samples and continue the evaluation with the next sample.

Note: Various error message will pop up if limits are exceeded.

Also if the final DO value is greater than the initial DO value an error message will be displayed.

46

The OUR is used to determine the oxygen consumption or respiration rate in water. It is defined as
the mg/L of oxygen consumed per hour.

The following equation is used for OUR determination:

where:
DO

START

= Dissolved oxygen level at start of test

DO

END

= Dissolved oxygen level at end of test

t

ELAPSED

= Elapsed time of test in seconds

total volume/sample volume = Dilution factor of sample
Before starting an OUR test remember to set the OUR configuration from the Setup menu (page 19).
This a an example of possible setting. Follow your normal SOP.

Make sure the DO probe has been calibrated before using. Clean off probe between samples.
Press MODE to select the OUR measurement mode. Place the calibrated probe into the airtight container

of sample. Stir the sample. Press Start to begin taking measurements.
During the analysis the meter will display the ongoing calculation.

OUR MEASUREMENT

OUR MEASUREMENT

47

OUR MEASUREMENT

OUR recall:

At the end of the analysis the meter will display the computed OUR value, the duration of the measurement,
the pressure and the temperature values. Press Log to record a record of this analysis.

OUR MEASUREMENT

48

To analyze another sample, clean and dry off probe. Place probe into the next prepared sample.

Press Start.

OUR Error messages will be displayed anytime a measurement exceeds the limits that were configured.
These will have to be reconfigured and the analysis restarted.

If the DO value is less than the minimum start DO value the meter will display an error message,
and the test cannot be started

OUR MEASUREMENT

SOUR MEASUREMENT

49

SOUR MEASUREMENT

The Specific Oxygen Uptake Rate (SOUR), also known as the oxygen consumption or respiration rate,
is defined as the milligram of oxygen consumed per gram of volatile suspended solids (VSS) per
hour. This quick test has many advantages: rapid measure of influent organic load and biodegradability,
indication of the presence of toxic or inhibitory wastes, degree of stability and condition of a sample,
and calculation of oxygen demand rates at various points in the aeration basin.
The following equation is used for SOUR determination:

SOUR = OUR / Solids Weight

where:

OUR is the Oxygen Uptake Rate (see equation on page 46)
Solids Weight is the Total solids or the Volatile suspended solids weight in g/L.

Temperature correction:

The SOUR value is corrected to 20 °C (68 °F) according to the Farrel and Bhide equation:

SOUR20=SOURTxΘ

(20-T)

Where T is the measured temperature in °C and Θ is a temperature dependent variable:

Θ= 1.05 for T above 20 °C
Θ= 1.07 for T below 20 °C

This calculation is valid only for temperature values in the range 10 to 30 °C. Temperature correction
is performed only if the option SOUR @ 20 °C is enabled.

Before starting a SOUR test remember to set the SOUR configuration from the Setup menu.
Make sure DO probe has been calibrated before using. Clean off probe between samples.
This is an example of possible setting. Follow your normal SOP.

Make sure the DO probe has been calibrated before using. Clean off probe between samples.
Press MODE to select the SOUR measurement mode. Place the calibrated probe into the airtight

container of sample. Stir the sample. Press Start to begin taking measurements.

SOUR MEASUREMENT

50

SOUR MEASUREMENT

During the analysis the meter will display the ongoing calculation.

At the end of the analysis the meter will display the computed SOUR value, the duration of the
measurement, and the pressure and temperature values. Press Log to record a record of this analysis.

To analyze another sample, clean and dry off probe. Place probe into the next prepared sample.
Press Start.

SOUR Error messages will be displayed anytime a measurement exceeds the limits that were configured.
These will have to be reconfigured and the analysis restarted. Examples follow.

If the DO reading is less than the minimum end DO value set during SOUR configuration, a warning
icon will be displayed and a beep will be heard every two seconds. Press Stop to stop the test and
the beeper.
In case that the SOUR value is corrected to 20 °C (68 °F) and the measured temperature isn’t in the
range 10 to 30 °C the temperature value will blink to alert that the temperature correction isn’t valid.

SOUR MEASUREMENT

51

Press LOG to save a complete set of data regarding the SOUR test.

Press Start to begin a new SOUR test.

Notes: If the DO reading is less than the minimum end DO value set during SOUR configuration,
a warning message will be displayed.
Press any key to clear the message from the screen, or press HELP to view detailed information
about the warning.
If the DO value is greater than the DO value from the beginning of the test an error message
will be displayed.

Press Start to begin a new SOUR test or ESC to return to the SOUR measure screen.

SOUR recall:

Note: In case that the SOUR value was corrected to 20 °C the message “(@20 °C)” will
be displayed before the SOUR value.

SOUR MEASUREMENT

SOUR MEASUREMENT

52

To replace the batteries, follow the next steps:

• Turn OFF the meter.

• Open the battery compartment by removing the four screws from the back of the meter.

• Remove the old batteries.

• Insert four new 1.5V AA batteries in the battery compartment while paying attention to the correct

polarity.

• Close the battery compartment using the four screws.

If the battery capacity is less than 10% the backlight feature is not available.

Note: The meter is provided with the BEPS (Battery Error Prevention System) feature, which
automatically turns the meter off when the batteries level is too low to ensure reliable readings.

BATTERIES REPLACEMENT

BATTERIES REPLACEMENT

53

PROBE MAINTENANCE
Cleaning the HI764113 Probe Body

• Rinse the probe with clean water to remove debris from around the probe body; wipe with a soft

cloth. Unscrew and remove the protective shield and set aside. Ensure weeds, debris, or other
materials are not coating the protective guard as this will block sample circulation preventing
sample from reaching the active measurement surface.

• The exterior of the HI764113 can be cleaned by wiping the exterior surface with a aqueous‑soapy

mixture and gently rubbing the exterior surface. Rinse with clean water.
The Stainless steel guard can be cleaned and polished with a cleaner suitable for stainless steel

cookware or appliances. Avoid chlorine bleach containing products.

Inspection

• Routinely Inspect probe for biofouling. Carefully inspect the probe body and Smart Cap™.

A scratch in the black protective layer on the Smart Cap™ will affect the calibration (and measurement).
Replace the Smart Cap™ if the sensing surface has been compromised.

Cleaning the Smart Cap™

• Use a mild detergent and a soft bristled toothbrush to clean the Smart Cap™.

Rinse the cap with water after cleaning and dry with a laboratory tissue.

Yearly Replacement of the Smart Cap™ .

• Easy to use smart caps contain pre‑loaded calibration coefficients that are automatically transmitted

to the probe. The Smart Cap™ stores data in a RFID tag. If caps are switched between probes,
no information will be lost. Smart Cap™ installation dates are easily tracked via the Probe info
screen and when powering , the meter displays remaining cap life.

• Rinse the probe with clean water to remove debris from around the probe body; wipe with a soft

tissue.

opdo™ Probe Replacement Cap Kit

HI764113‑1

Contains:
1 opdo™ probe Smart Cap™
1 syringe with silicon grease
1 lens wipe
1 certification/ instruction sheet

Note: Verify time and date are properly set on meter prior to new cap initialization.

PROBE MAINTENANCE

PROBE MAINTENANCE

54

1. Unplug the HI764113 from the HI98198 meter. Remove the stainless

steel guard from probe body and set aside. Wipe off the probe and cap
with a soft tissue.

2. Remove the expired “Smart Cap™” from the probe; Squeeze the used

cap at the notched V and pull it off the probe body (without twisting).

3. Remove the used O‑ring from the O‑ring groove by rolling it off the probe.

4. Wipe the O‑ring groove with a soft tissue followed by a cleaning with

the supplied lens cleaner wipe.

5. Remove the new O‑ring from the HI764113‑1 kit and slide on probe

body using care not to roll or twist the O‑ring.

6. Sparingly lubricate the O‑ring with a thin film of the supplied grease. Use

care to prevent grease or fingerprints from contacting the optical window.

7. Clean the lens with an unused portion of the supplied lens cleaner wipe.

8. Remove the new optical cap from the box. Align the notched cutout

arrow on the Smart Cap™ with the matching guide on the probe body.

9. Slide and press the Smart Cap™ onto the HI764113 body until the

cap snaps in place. Once the cap is installed, it should not be removed
unless a new cap is required.

10. Connect the HI764113 probe to the HI98198 meter by connecting

the connector to the DIN jack located on the top of the meter.

11. Power the meter to initiate the cap timer.

12. Calibrate.

13. Reinstall the stainless steel guard onto the probe body.

PROBE MAINTENANCE

PROBE MAINTENANCE

55

TROUBLESHOOTING GUIDE

SYMPTOMS PROBLEM SOLUTION

Display shows DO reading
blinking.

Reading out of range. Recalibrate the meter;

Check the sample is
within measurable range.

Meter shuts off. Dead batteries; Auto Power

Off feature is enabled: in
this case, meter shuts off
after selected period of
non use.

Replace batteries; Press
ON/OFF.

The meter does not start
when pressing ON/OFF.

Initialization error. Press and hold down

ON/OFF for about
20 seconds or disconnect
and then connect the
batteries.

TROUBLESHOOTING GUIDE

No conditioning period is required when using a HI764113 DO probe.
Store the HI764113 probe in the HI98198 carrying case when not in use. For frequent use and short

term storage it is recommended to remove the stainless steel guard and replace with the storage
vessel that has a small amount of deionized water. The probe can also be stored with the stainless
steel guard on in a beaker containing deionized water.

For longer term storage, remove the stainless steel guard and replace with the storage vessel.

PROBE MAINTENANCE

56

TROUBLESHOOTING GUIDE

TROUBLESHOOTING GUIDE

SYMPTOMS PROBLEM SOLUTION

Display shows “No Cap
Detected” .

Cap not on correctly. Check Cap/Reseat Cap.

Display shows “No Cap
Info Detected” with Cap.

Cannot read Cap
Info.

Check Cap and Retry. Replace Cap
if it continues.

Display shows “Cap
Damaged”.

Sensor Damaged. Try reseating cap. If this doesn’t

resolve issue, replace Cap.

Display shows “Cap
Expired”.

Cap reached lifetime
use expiration.

Continue OR Replace Cap
(Continuing use may result in
incorrect measurements).

Display “No Probe”. Probe not present/

Not connected
properly.

Connect/Disconnect and reconnect
probe OR Turn meter OFF then ON.

Meter shows “Probe Err
xx” message.

Probe Internal Error. Disconnect and reconnect probe.

If problem persists replace the
probe.

57

ACCESSORIES

Code Description

HI7040 Bi‑component Zero

HI40036P 100 mL plastic beaker (10 pcs.)

HI740027P 1.5V AA batteries (12 pcs.)

HI764113

Optical DO probe with built‑in temperature sensor, shield and
4 m (13’4) cable

HI764113-1 Smart Cap™ with O‑ring

HI764113-2 Calibration/storage vessel

HI764113-3 Stainless steel protective shield

HI764113/10 HI764113 with 10 m cable

HI764113/20 HI764113 with 20 m cable

HI920016 USB Type A to C cable

ACCESSORIES

58

All Hanna Instruments conform to the CE European Directives.

Disposal of Electrical & Electronic Equipment. The product should not be treated as household
waste. Instead hand it over to the appropriate collection point for the recycling of electrical and
electronic equipment which will conserve natural resources.

Disposal of waste batteries. This product contains batteries, do not dispose of them with other
household waste. Hand them over to the appropriate collection point for recycling.

Ensuring proper product and battery disposal prevents potential negative consequences for the
environment and human health. For more information, contact your city, your local household
waste disposal service, the place of purchase or go to www.hannainst.com.

RoHS

compliant

CERTIFICATION

MAN98198 07/18

59

Recommendations
for users

Before using this product, make sure it is entirely suitable for your
specific application and for the environment in which it is used. Any
variation introduced by the user to the supplied equipment may degrade
the meters’ performance. For yours and the meter’s safety do not use
or store the meter in hazardous environments.

Hanna Instruments reserves the right to modify the design, construction or appearance of its

products without advanced notice.

The HI98198 and HI764113 are warranted for two years against defects in
workmanship and materials when used for their intended purpose and maintained
according to instructions. HI764113‑1 is warranted for 1 year. This warranty is
limited to repair or replacement free of charge.

Damage due to accidents, misuse, tampering or lack of recommended maintenance
is not covered.

If service is required, contact your local Hanna Instruments Office. If under warranty,
report the model number, date of purchase, serial number and the nature of the
problem. If the repair is not covered by the warranty, you will be notified of the
charges incurred. If the meter is to be returned to Hanna Instruments, first obtain a
Returned Goods Authorization (RGA) number from the Technical Service department
and then send it with shipping costs prepaid. When shipping any meter, make sure
it is properly packed for complete protection.

Warranty

Printed in ROMANIAMAN98198

World
Headquarters

Hanna Instruments Inc.
Highland Industrial Park
584 Park East Drive
Woonsocket, RI 02895 USA
www.hannainst.com

Local Office

Hanna Instruments Inc.
Highland Industrial Park
584 Park East Drive
Woonsocket, RI 02895 USA
Phone: [phone]
Fax: [phone]
e‑mail: [e-mail]