Hach LBOD101 Manuale utente

DOC022.53.80025

LBOD101

05/2021, Edition 4

User Manual

Table of Contents

Section 1 Product overview................................................................................. 3

Section 2 Specifications........................................................................................ 3

Section 3 Safety information............................................................................... 4

3.1 Intended use ....................................................................................................... 4

3.2 Use of hazard information..................................................................................... 4

3.3 Precautionary labels............................................................................................. 5

3.4 Product hazards.................................................................................................... 5

Section 4 Preparation for use.............................................................................. 5

Section 5 Calibration.............................................................................................. 6

5.1 Calibration notes................................................................................................... 6

5.2 LBOD water-saturated air (100%) calibration procedure...................................... 6

5.3 Zero-point calibration procedure........................................................................... 7

Section 6 Sample measurement ...................................................................... 8

6.1 Sample measurement notes................................................................................. 8

6.2 Sample measurement procedure......................................................................... 8

6.3 Low-level measurements...................................................................................... 9

Section 7 Maintenance........................................................................................... 9

7.1 Clean the probe.................................................................................................... 9

7.2 Replace the sensor cap and iButton..................................................................... 9

7.3 Replace the stirrer.............................................................................................. 12

7.4 Storage............................................................................................................... 12

Section 8 Troubleshooting................................................................................. 13

Section 9 Consumables....................................................................................... 14

Table of Contents

Section 1 Product overview

The Intellical LBOD101 probe is a digital, luminescent dissolved oxygen sensor that measures the

dissolved oxygen concentration of BOD (biochemical oxygen demand) samples. The probe has

temperature and absolute air pressure sensors for accurate dissolved oxygen measurements. The

probe stays on standard BOD bottles and stirs the sample during measurements. Refer to Figure 1.

Figure 1 Probe overview

1 LBOD sensor cap 6 Stirrer on/off button

2 Thermistor 7 Power indicator LED

3 Stirrer assembly 8 Air pressure sensor module

4 Probe lens 9 iButton® compartment1

5 Probe body with stirrer assembly

Section 2 Specifications

Specifications are subject to change without notice.

Specifications Details

Probe type Luminescent dissolved oxygen (LDO) sensor with integrated stirring

system

Dissolved oxygen range 0.05 to 20.0 mg/L (ppm); 1 to 200% saturation

Dissolved oxygen accuracy ±0.05 mg/L for concentrations less than 10 mg/L O2

±0.1 mg/L for concentrations more than 10 mg/L O2

1iButton is a registered trademark of Maxim Integrated Products, Inc.

English 3

Specifications Details

% saturation resolution 0.1%

% saturation accuracy ±0.59% of reading

Stabilization time T90% at 10 seconds (when the solution is stirred)

Temperature resolution 0.1 °C (0.18 °F)

Temperature accuracy ±0.3 °C (±0.54 °F)

Pressure resolution 5 mbar (0.5 kPa)

Pressure accuracy ±3 mbar (0.3 kPa)

Operating temperature 0 to 50 °C (32 to 122 °F)

Storage temperature 5 to 40 °C (41 to 104 °F)

Minimum immersion depth 10 mm (0.394 in.)

Dimensions Diameter: 15.875 mm (0.625 in.)

Length: 215 mm (8.46 in.)

Cable length: 1.8 m (5.9 ft)

Cable connection M12 digital output and connector

Warranty 1 year on the probe. This warranty covers manufacturing defects, but

not improper use or wear.

Certifications CE, FCC/ISED

Section 3 Safety information

3.1 Intended use

The Intellical probes are intended for use by individuals who measure water quality parameters in the

laboratory or in the field. The Intellical probes do not treat or alter water.

3.2 Use of hazard information

D A N G E R

Indicates a potentially or imminently hazardous situation which, if not avoided, will result in death or

serious injury.

WARNING

Indicates a potentially or imminently hazardous situation which, if not avoided, could result in death

or serious injury.

CAUTION

Indicates a potentially hazardous situation that may result in minor or moderate injury.

N O T I C E

Indicates a situation which, if not avoided, may cause damage to the instrument. Information that

requires special emphasis.

4 English

3.3 Precautionary labels

Read all labels and tags attached to the instrument. Personal injury or damage to the instrument

could occur if not observed. A symbol on the instrument is referenced in the manual with a

precautionary statement.

Electrical equipment marked with this symbol may not be disposed of in European

domestic or public disposal systems. Return old or end-of-life equipment to the

manufacturer for disposal at no charge to the user.

3.4 Product hazards

CAUTION

Chemical exposure hazard. Obey laboratory safety procedures and wear all of the

personal protective equipment appropriate to the chemicals that are handled. Refer to

the current safety data sheets (MSDS/SDS) for safety protocols.

CAUTION

Chemical exposure hazard. Dispose of chemicals and wastes in accordance with local,

regional and national regulations.

Section 4 Preparation for use

Prepare the probe for calibration and measurement as follows. Do not touch the protective black

layer on the LBOD sensor cap.

1. Open the pressure sensor module cap and make sure that the label on the iButton is on top.

2. Rinse the probe with deionized water. Blot dry with a lint-free cloth.

3. Make sure that the meter has the correct date and time settings. The service-life time stamp in

the probe comes from the date and time settings in the meter.

Note: Some meters automatically open the date and time settings when the meter starts for the first time, or

after battery replacement.

4. Connect the probe to the meter.

English 5

Section 5 Calibration

The procedure that follows is applicable to meters that can connect to Intellical LBOD probes. Refer

to the applicable meter documentation for meter operation and probe-specific settings.

5.1 Calibration notes

Read the notes that follow before calibration.

• Measure samples as soon as possible after collection.

• Use the single display mode for calibration when more than one probe is connected to the meter (if

applicable).

• Calibrate the probes and verify the calibration regularly for best results. Use the meter to set

calibration reminders.

• The calibration data is stored in the probe. When a calibrated probe is connected to a different

meter with the same calibration options, a new calibration is not necessary.

• Air bubbles below the sensor when in solution can cause a slow response or error in the

calibration. Make sure to remove air bubbles during calibration.

• The meter uses the slope value shown at the end of the calibration to monitor the condition of the

sensor cap.

5.2 LBOD water-saturated air (100%) calibration procedure

1. Fill a BOD bottle

approximately ¾ full

with water.

2. Put a stopper on

the bottle and shake

for 30 seconds.

3. Rinse the probe

with deionized water.

Dry the probe with a

lint-free cloth.

4. Carefully dry the

LBOD sensor cap

with a non-abrasive

cloth.

5. Put the probe in

the bottle. Wait

approximately

10 minutes for the

contents to adjust to

ambient

temperature.

6. Go to the

calibrate menu.

Select the probe, if

applicable.

7. Read the

dissolved oxygen

value. The display

shows 100% when

the reading is stable.

8. Save the

calibration.

6 English

5.3 Zero-point calibration procedure

A zero-point calibration can increase the measurement accuracy of samples that have less than

1 mg/L O2. A zero point calibration is not recommended for samples that have more than 1 mg/L O2.

Set the calibration mode to "100% with 0". The meter starts the calibration with the 100%

measurement, then continues to the zero-point measurement.

1. Fill a BOD bottle

with deionized water.

2. Add 300 mg of

sodium sulfite to the

bottle.

3. Add 2 mL of

cobalt chloride

solution to the bottle.

4. Put a stopper on

the bottle and fully

mix for 30 seconds.

5. Remove the

stopper. Put the

probe in the bottle.

6. Tap the probe to

remove air bubbles.

7. Wait

approximately

10 minutes for the

contents to adjust to

ambient

temperature.

8. Start the stirrer.

9. Read the

dissolved oxygen

value. Wait for the

measurement to

become stable.

10. Save the

calibration.

11. Rinse the probe

with deionized water.

Dry the probe with a

lint-free cloth.

12. Fill a BOD bottle

with deionized water.

Put the probe in the

bottle and stir for

10 minutes to fully

remove the sulfite

from the probe.

English 7

Section 6 Sample measurement

The procedure that follows is applicable to meters that can connect to Intellical LBOD probes. Refer

to the applicable meter documentation for meter operation and probe-specific settings.

6.1 Sample measurement notes

Read the notes that follow before sample measurements.

• Salinity changes the solubility of oxygen in water. Measure the sample salinity and enter the value

in the probe settings of the meter.

• High concentrations (more than 1 molar) of acids or bases will decrease the service life of the

LBOD sensor cap.

• Rinse the probe with deionized water and dry with a lint-free cloth between measurements to

prevent contamination.

• If complete traceability is necessary, enter a sample ID and operator ID before measurement.

Refer to the meter manual for instructions.

• The meter automatically saves the measurement data when the user manually reads each data

point and when the meter is set to read at regular intervals. The user must manually save each

data point when the meter is set to read continuously.

• Air bubbles below the sensor can cause a slow response or error in the measurement. Make sure

to remove air bubbles before and during measurements.

6.2 Sample measurement procedure

1. Rinse the probe

with deionized water.

Dry the probe with a

lint-free cloth.

2. Put the probe in

the BOD sample.

3. Tap the probe to

remove air bubbles.

4. Start the stirrer.

5. Read the

dissolved oxygen

value of the sample.

The display shows

the dissolved oxygen

value when the

reading is stable.

8 English

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