Hach PHC108 Bedienungsanleitung

DOC022.53.80428

PHC108

05/2021, Edition 3

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.............................................................................................. 5

5.1 Calibration notes................................................................................................... 5

5.2 Calibration procedure........................................................................................... 6

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

6.1 Sample requirements............................................................................................ 7

6.2 Sample measurement notes................................................................................. 7

6.3 Sample measurement procedure......................................................................... 8

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

7.1 Verification procedure........................................................................................... 8

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

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

8.2 Soak procedure for dry probes........................................................................... 10

8.3 Storage............................................................................................................... 10

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

Section 10 Consumables..................................................................................... 11

10.1 Recommended standards................................................................................. 12

10.2 Accessories...................................................................................................... 13

Table of Contents

Section 1 Product overview

The Intellical PHC108 pH probe is a digital, combination electrode with a cone-shaped glass sensor

that measures the pH of semi-solid samples, emulsions and slurries (e.g., soil, mud, sludge, foods).

The probe is non-refillable and has a built-in temperature sensor, ceramic pin and open reference

junctions. Refer to Figure 1.

Note: Do not use the probe to measure the pH of organic solvents, low ionic strength samples or very alkaline

samples.

Figure 1 Probe overview

1 Probe soaker bottle with storage solution 3 Reference junction

2 Cable 4 Glass sensor and temperature sensor

Section 2 Specifications

Specifications are subject to change without notice.

Specifications Details

Probe type Digital combination pH probe with non-refillable polymer electrolyte,

cone-shaped tip and built-in temperature sensor

pH range 2 to 12 pH

pH accuracy ±0.02 pH

Reference type Ag/AgCl

Reference junction Ceramic pin and open junctions

Slope –59 mV/pH (85 to 115% at 25 °C (77 °F) per Nernstian theoretical

value)

Isopotential point 0 (±30) mV at 7.0 (±0.5) pH

Sodium (alkalinity) error <0.1 pH at pH >11 in 0.1 M NaCl

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

English 3

Specifications Details

Temperature sensor type 30 kΩ NTC thermistor

Operating temperature 0 to 60 °C (32 to 140 °F)

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

Minimum immersion depth 15 mm (0.59 in.)

Body material (standard) Stainless steel (glass internal)

Electrolyte Non-refillable polymer

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: 182 mm (7.2 in.) total; 85 mm (3.35 in.) below head

Cable length: 1 m (3.3 ft)

Weight (includes cable) ~0.4 kg (0.9 lb)

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 PHC108 probe is intended for use by individuals who measure the pH of semi-solid

samples, emulsions and slurries in the laboratory. The Intellical probes do not treat or alter samples.

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.

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

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.

CAUTION

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

Section 4 Preparation for use

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

reference junctions hydrated. Prepare the probe as follows.

1. Loosen the cap on the soaker bottle. Remove the soaker bottle from the probe.

2. Rinse the reference junctions and glass sensor with deionized water. Blot dry with a lint-free

cloth.

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

4. 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.

5. Connect the probe to the meter.

Section 5 Calibration

The procedure that follows is applicable to meters that can connect to Intellical pH 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:

• Use prepared pH buffer solutions or mix pH buffer powder pillows with deionized water for

calibration. Discard the prepared buffer solutions after each calibration.

English 5

• Use two or three buffer solutions for best results. Two buffer solutions are sufficient if the expected

sample pH is between the pH of the two buffer solutions. The sequence in which the pH buffer

solutions are used is not important. Use buffer solutions that are 2 or more pH units apart.

• For a one-point calibration, use a pH buffer near the expected sample pH.

• Use the default calibration options or change the options 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 pH buffer solutions have known pH values at different temperatures. The meter uses the mV

and temperature readings of the probe in the pH buffer solutions to calculate a calibration slope.

During measurements, the meter adjusts the slope for the sample temperature to determine the

pH value of the sample.

5.2 Calibration procedure

1. Go to the

calibrate menu.

Select the probe, if

applicable. The

display shows the

pH buffer solutions

to use for calibration.

2. Prepare or pour

the pH buffer

solutions in different

beakers.

3. Rinse the probe

with deionized water.

Dry the probe with a

lint-free cloth.

4. Put the probe in

the first pH buffer

solution. Make sure

that the sensor and

reference junction

are 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

refresh the reference

junction and remove

air bubbles.

6. Stir slowly, then

read the pH value of

the buffer solution.

The display shows

the temperature-

corrected pH value

when the reading is

stable.

7. Continue with

steps 3 through 6 for

the remaining

buffers or select

Done.

8. Save the

calibration.

6 English

Section 6 Sample measurement

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

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

6.1 Sample requirements

N O T I C E

Make sure that the sample type is compatible with the probe, or probe damage can occur.

• Do not use force to push the probe into samples. Use a stainless steel rod to make a hole in the

sample, then put the probe into the hole.

• Do not use the probe to measure samples where glass is not permitted.

• Probes with a Ag/AgCl reference system and single junction are not compatible with solutions that

contain silver complexing or binding agents (e.g., TRIS, proteins and sulfides). To measure in

these solutions, use a double junction probe, a probe with a Ag+ (silver ion) barrier or a Red Rod

probe.

• Proteins can collect on the sensing element. Make sure that the probe stays clean if proteins are in

the sample.

• Do not measure samples that are hotter or colder than the specified operating temperature of the

probe. Refer to Specifications on page 3.

6.2 Sample measurement notes

Read the notes that follow before sample measurements.

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

prevent contamination.

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

• 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

6.3 Sample measurement procedure

1. Rinse the probe

with deionized water.

Dry the probe with a

lint-free cloth.

2. Put the probe in

the sample with the

sensor and

reference junction

fully in the sample.

3. Shake the probe

from side to side to

refresh the reference

junction and remove

air bubbles.

Note: For homogenous

semi-solid samples,

shaking is not

necessary.

4. Stir gently, then

read the pH value of

the sample. The

display shows the

temperature-

corrected pH value

when the reading is

stable.

Note: For homogenous

semi-solid samples,

stirring is not

necessary.

Section 7 Verify the calibration

Measure the pH value of a fresh pH buffer solution to make sure the result is accurate. The meter

compares the selected pH buffer value to the measured pH value and accepts or rejects the

measurement. The user can change the pH buffer solution and acceptance criteria for verification in

the probe-specific settings.

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

7.1 Verification procedure

1. Go to the

verification menu.

The display shows

the pH buffer

solution to use for

verification.

Note: Menu name for

HQd meters: Run check

standard.

2. Prepare or pour

the pH buffer

solution into a

beaker.

3. Rinse the probe

with deionized water.

Dry the probe with a

lint-free cloth.

4. Put the probe in

the pH buffer

solution with the

sensor and

reference junction

fully in the solution.

Do not put the probe

on the bottom or

sides of the beaker.

8 English

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