Hach LDO101 Manual de usuario

DOC022.53.80021

LDO101

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 LDO water-saturated air (100%) calibration procedure........................................ 7

Section 6 Sample measurement ...................................................................... 7

6.1 Sample measurement notes................................................................................. 7

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

Section 7 Maintenance........................................................................................... 8

7.1 Clean the probe.................................................................................................... 8

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

7.3 Remove or install the shroud................................................................................ 9

7.4 Storage............................................................................................................... 11

Section 8 Troubleshooting................................................................................. 12

Section 9 Consumables....................................................................................... 12

Table of Contents

Section 1 Product overview

The Intellical LDO101 series probes are digital, luminescent dissolved oxygen probes that measure

the dissolved oxygen concentration in wastewater, drinking water and general water samples. The

probes have temperature and absolute air pressure sensors for accurate dissolved oxygen

measurements. The standard probes are for laboratory use. The rugged probes are for field use.

Refer to Figure 1.

Note: For BOD applications, use the LBOD10101 probe, which has the LDO technology and a stirrer for

measurements in a BOD bottle.

Figure 1 Probe overview

1 LDO sensor cap 5 Pressure sensor module

2 Rugged probe 6 iButton®1

3 Standard probe 7 iButton compartment

4 Cable 8 Pressure sensor module cap

Section 2 Specifications

Specifications are subject to change without notice.

Specifications Details

Probe type Luminescent dissolved oxygen (LDO) probe

Dissolved oxygen range 0.1 to 20.0 mg/L (ppm); 1 to 200% saturation

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

English 3

Specifications Details

Dissolved oxygen accuracy ±0.1 mg/L for concentrations less than 8 mg/L

±0.2 mg/L for concentrations more than 8 mg/L

% saturation resolution 0.1%

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 1 mbar (1 hPa)

Pressure accuracy ±0.8%

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

Storage temperature 0 to 40 °C (32 to 104 °F)

Minimum immersion depth 25 mm (0.98 in.)

Dimensions (standard) Diameter: 29 mm (1.14 in.)

Length: 191 mm (7.52 in.)

Cable length: LDO10101: 1 m (3.28 ft); LDO10103: 3 m (9.84 ft)

Dimensions (rugged) Diameter: 46 mm (1.8 in.)

Length: 223 mm (8.7 in.)

Cable length: LDO10105: 5 m (16.4 ft); LDO10110: 10 m (32.8 ft);

LDO10115: 15 m (49.2 ft); LDO10130: 30 m (98.4 ft)

Cable connection M12 digital output and connector

Warranty 3 years on the probe, 1 year on the sensor cap. 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.

4 English

N O T I C E

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

requires special emphasis.

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 LDO sensor cap.

1. Remove the shroud. Refer to Remove or install the shroud on page 9.

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

3. Make sure that the LDO sensor cap and iButton label have the same lot code. Refer to Figure 2.

4. Install the LDO sensor cap and tighten by hand. Do not tighten more than is necessary for a good

seal.

5. Soak the probe in 100 mL of tap water for 30 minutes before use. For probes that will be in

aqueous solutions for more than 6 hours continuously, soak the probe for 72 hours.

Note: After 72 hours, the LDO sensor cap is fully hydrated.

6. 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.

7. Connect the probe to the meter.

8. Install the shroud. Refer to Remove or install the shroud on page 9.

Note: Make sure to install the shroud during field use to prevent damage to the sensing elements. The product

warranty does not include such damage.

English 5

Figure 2 Compare lot number

Section 5 Calibration

The procedure that follows is applicable to meters that can connect to Intellical LDO 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.

• Remove the shroud before calibration. Refer to Remove or install the shroud on page 9.

• The factory calibration is sufficient for most applications. If necessary, set the probe to use a

different calibration option in the probe settings menu.

• 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.

6 English

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

1. Fill a BOD bottle

¼ 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. Put the probe in

the bottle. Wait

10 minutes or more

(30 minutes for best

results) for the

contents to adjust to

ambient

temperature.

5. Go to the

calibrate menu.

Select the probe, if

applicable.

6. Read the

dissolved oxygen

value. The display

shows 100% when

the reading is stable.

7. Save the

calibration.

Section 6 Sample measurement

The procedure that follows is applicable to meters that can connect to Intellical LDO 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.

• Do not submerge the pressure sensor module.

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

in the probe settings of the meter.

• To decrease the measurement time, condition the probe and try different stir rates.

• 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.

English 7

• Make sure to install the shroud before field use to prevent damage to the sensing elements. Refer

to Remove or install the shroud on page 9. The probe warranty does not include such damage.

• To deploy a rugged probe at a distance, toss the probe body with a slow underhand throw. Do not

throw the probe by the cable to prevent damage to cable, the probe or the user.

6.2 Sample measurement procedure

1. Rinse the probe

with deionized water.

Dry the probe with a

lint-free cloth.

Rugged probes:

install the shroud.

2. Put the probe in

the sample 25 mm

(1 inch) or more. Do

not put the probe on

the bottom or sides

of the container. Stir

the sample at a

moderate rate or put

the probe in flowing

conditions.

3. Shake the probe

from side to side to

remove air bubbles.

Rugged probes:

move the probe up

and down to remove

air bubbles.

4. Stir gently, then

read the dissolved

oxygen value of the

sample. The display

shows the dissolved

oxygen value when

the reading is stable.

Section 7 Maintenance

7.1 Clean the probe

N O T I C E

The LDO sensor cap has a protective black layer to increase the life of the LDO sensor. Do not rub

the black layer to clean the LDO sensor cap. Do not use alcohol or other organic solvents to clean

the LDO sensor cap.

Keep the LDO sensor cap clean for best results. Use only water and neutral detergents to clean the

probe.

1. Remove the shroud. Refer to Remove or install the shroud on page 9.

2. If water is seen between the LDO sensor cap and lens:

a. Remove the LDO sensor cap.

b. Blot dry the LDO sensor cap and lens with a soft dry cloth. Refer to Figure 3.

If the probe lens is dirty, rinse the lens with dilute isopropyl alcohol (10% or less) or deionized

water. Blot dry with a non-abrasive cloth. Do not rub the lens or use abrasive cleaners.

c. Install the LDO sensor cap and tighten by hand. Do not tighten more than is necessary for a

good seal.

3. Put the probe in a neutral cleaning solution and stir the solution. Do not rub or remove the black

layer on the LDO sensor cap.

Note: If disinfection is necessary, put the probe in a dilute alcohol solution for a maximum of 2 minutes and

rinse immediately with deionized water. Do not use an alcohol solution more than two times a day.

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

5. Install the shroud. Refer to Remove or install the shroud on page 9.

8 English

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