Hach MTC101 User manual

DOC022.53.80033

MTC101

05/2021, Edition 5

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 Calibration procedure........................................................................................... 7

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

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

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

Section 7 Verify the calibration.......................................................................... 8

7.1 Verification procedure........................................................................................... 9

Section 8 Maintenance........................................................................................... 9

8.1 Clean the probe.................................................................................................... 9

8.2 Remove or install the shroud.............................................................................. 10

8.3 Storage............................................................................................................... 11

Section 9 Troubleshooting................................................................................. 11

Section 10 Consumables..................................................................................... 12

Table of Contents

Section 1 Product overview

The Intellical MTC101 series ORP probes are digital, combination electrodes that measure the

oxidation reduction potential (ORP/Redox) of wastewater, drinking water and general water samples.

The probes have a non-refillable, gel-filled electrolyte and a built-in temperature sensor. The open

reference junction gives an optimum electrical connection between the sample and the electrolyte

and does not become clogged. The standard probes are for laboratory use. The rugged probes are

for field use. Refer to Figure 1.

Note: Do not use the probe for measurements in organic solvents.

Figure 1 Probe overview

1 Shroud (rugged model) 6 Locking ring (rugged model)

2 Probe storage cap 7 Rugged probe

3 Platinum electrode and temperature sensor 8 Probe soaker bottle holder or storage cap

4 Reference junction 9 Standard probe

5 Protective tape (rugged model) 10 Probe soaker bottle with storage solution

Section 2 Specifications

Specifications are subject to change without notice.

Specifications Details

Probe type Digital combination electrode with a non-refillable Ag/AgCl

reference and a built-in temperature sensor

Range ±1200 mV

Resolution 0.1 mV

Reference type Ag/AgCl

Reference junction Open

English 3

Specifications Details

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

Operating temperature 0 to 80 °C (32 to 176 °F)

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

Minimum immersion depth 20 mm (0.79 in.)

Body material (standard) Epoxy

Body material (field rugged) Epoxy/stainless steel

Reference potential versus

Standard Hydrogen Electrode

207 mV at 25 °C

Electrolyte Non-refillable gel reference element

Storage solution Hach pH electrode storage solution1 or 3 M KCl

Cable connection M12 digital output and connector

Dimensions Diameter: 12 mm (0.47 in.)

Length: 175 mm (6.9 in.) total; 103 mm (4.1 in.) below head

Cable length: MTC10101: 1 m (3.3 ft); MTC10103: 3 m (9.8 ft)

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

Length: 223 mm (8.7 in.)

Cable length: MTC10105: 5 m (16.4 ft); MTC10110: 10 m

(32.8 ft); MTC10115: 15 m (49.2 ft); MTC10130: 30 m (98.4 ft)

Warranty 6 months 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.

1Use of other storage solutions can cause permanent damage to the probe.

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.

CAUTION

Personal injury hazard. Glass components can break. Handle with care to prevent cuts.

Section 4 Preparation for use

N O T I C E

Make sure to remove the protective tape from the reference junction of new rugged probes. A probe

with a blocked reference junction will not operate correctly.

New probes come with a soaker bottle that contains storage solution to keep the glass bulb and

reference junction hydrated. New rugged probes come with protective tape over the reference

junction. Prepare the probe as follows.

1. Remove the soaker bottle or probe storage cap from the probe. Refer to Figure 2.

2. If a rugged probe, remove the protective tape from the reference junction. Refer to Figure 2.

3. Rinse the probe sensors and reference junction with deionized water. Blot dry with a lint-free

cloth.

4. For faster stabilization, soak the probe for 3 or more minutes in the sample before use.

5. 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.

6. Connect the probe to the meter.

English 5

Figure 2 Remove the protective tape

Section 5 Calibration

The procedure that follows is applicable to meters that can connect to Intellical ORP (MTC) 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:

• The meter shows the standard solution to use for calibration. If necessary, change the standard

solution in the probe settings menu.

• Do not dilute the standard solution. Discard the standard solution after each calibration.

• If the calibration standard is ZoBell's ORP/Redox standard solution, calibrate the probe at a

solution temperature that is between 0 and 30 °C (32 to 86 °F). If the calibration standard is Light’s

solution, calibrate the probe at 25 °C (77 °F).

• 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.

• Remove the shroud before calibration. Refer to Remove or install the shroud on page 10.

6 English

5.2 Calibration procedure

1. Go to the

calibrate menu.

Select the probe, if

applicable. The

display shows the

ORP/Redox

standard solution to

use for calibration.

2. Pour the fresh

standard solution

into a beaker.

3. Rinse the probe

with deionized water.

Dry the probe with a

lint-free cloth.

Rugged probes:

install the shroud.

4. Put the probe in

the standard solution

with the sensor and

reference junction

fully in the solution.

Do not put the probe

on the bottom or

sides of the beaker.

5. Shake the probe

from side to side to

remove air bubbles.

6. Stir gently, then

read the ORP/Redox

value of the standard

solution. The display

shows the mV value

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 ORP (MTC) 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.

• For measurements in reducing-type samples, soak the probe in Reducing Solution for ORP

Electrodes for 3-10 minutes before the initial sample measurement. The soak time significantly

decreases the stabilization time.

• 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.

English 7

• 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.

• If the probe is a rugged type, 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 10. 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. If the samples

contain reducing

agents, soak the

probe in Reducing

Solution for ORP

Electrodes for 3 to

10 minutes.

2. Rinse the probe

with the sample. Dry

the probe with a lint-

free cloth.

Rugged probes:

install the shroud.

3. Put the probe in

the sample with the

sensor and

reference junction

fully in the sample.

Do not put the probe

on the bottom or

sides of the beaker.

4. Shake the probe

from side to side to

refresh the reference

junction and remove

air bubbles.

Rugged probes:

move the probe up

and down to remove

air bubbles.

5. Stir gently, then

read the ORP/Redox

value of the sample.

The display shows

the mV value when

the reading is stable.

Section 7 Verify the calibration

Measure the value of a fresh ORP/Redox standard solution to make sure that the result is accurate.

Refer to the procedure that follows. The meter compares the selected standard solution value to the

measured value and accepts or rejects the measurement. The user can change the standard solution

and acceptance criteria for verification in the probe-specific settings.

Note: Password protection may prevent access to the acceptance criteria.

8 English

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