Hach PHC101 User manual
DOC022.53.80023
PHC101
06/2021, 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..................................................................................... 5
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 ...................................................................... 8
6.1 Sample measurement notes................................................................................. 8
6.2 Sample measurement procedure......................................................................... 8
Section 7 Verify the calibration.......................................................................... 9
7.1 Verification procedure........................................................................................... 9
Section 8 Maintenance........................................................................................ 10
8.1 Clean the probe.................................................................................................. 10
8.2 Soak procedure for dry probes........................................................................... 11
8.3 Remove or install the shroud.............................................................................. 11
8.4 Storage............................................................................................................... 12
Section 9 Troubleshooting................................................................................. 13
Section 10 Consumables..................................................................................... 14
10.1 Recommended standards................................................................................. 14
10.2 Accessories...................................................................................................... 15
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Table of Contents
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Section 1 Product overview
The Intellical PHC101 series pH probes are digital, combination electrodes that measure the pH 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 to measure the pH of organic solvents or samples with a pH less than 2.
Figure 1 Probe overview
1 Shroud (rugged model) 6 Locking ring (rugged model)
2 Probe storage cap 7 Rugged probe
3 Glass bulb and temperature sensor 8 Probe soaker bottle holder or storage cap
4 Reference junction 9 Standard probe
5 Protective tape 10 Probe soaker bottle with storage solution
Section 2 Specifications
Specifications are subject to change without notice.
Specifications Details
Probe type Digital combination pH probe with non-refillable gel electrolyte
and built-in temperature sensor
pH range 2 to 14 pH
pH accuracy ±0.02 pH
Reference type Ag/AgCl
English 3
Specifications Details
Reference junction Open
Slope –59 mV/pH (90 to 110% at 25 °C (77 °F) per Nernstian theoretical
value)
Isopotential point 0 (±30) mV at 7.0 (±0.5) pH
Sodium (alkalinity) error –0.6 pH at pH 12.6 in 1 M NaOH
Temperature accuracy ±0.3 °C (±0.54 °F)
Temperature sensor type 30 kΩ NTC thermistor
Operating temperature 0 to 50 °C (32 to 122 °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
Electrolyte Non-refillable gel reference element
Storage solution Hach pH electrode storage solution1
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: PHC10101: 1 m (3.3 ft); PHC10103: 3 m (9.8 ft)
Dimensions (rugged) Diameter: 46 mm (1.8 in.)
Length: 223 mm (8.7 in.)
Cable length: PHC10105: 5 m (16.4 ft); PHC10110: 10 m
(32.8 ft); PHC10115: 15 m (49.2 ft); PHC10130: 30 m (98.4 ft)
Weight (includes cable) PHCxxx01: ~0.4 kg (0.9 lb); PHCxxx03: ~0.45 kg (1 lb)
Weight (rugged, includes cable) PHCxxx05: ~1.3 kg (2.9 lb); PHCxxx10: ~1.55 kg (3.4 lb);
PHCxxx15: ~1.9 kg (4.2 lb); PHCxxx30: 3.0 kg (6.6 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 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.
1Use of other storage solutions can cause permanent damage to the probe.
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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.
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 probes. A probe with a
blocked reference junction will not operate correctly.
New probes come with protective tape and a soaker bottle that contains storage solution to keep the
glass bulb and reference junction hydrated. Prepare the probe as follows.
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1. Remove the protective tape from the reference junction. Refer to Figure 2.
2. Rinse the reference junction and glass bulb 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.
Figure 2 Remove the protective tape
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.
• 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).
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• 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.
• If the rugged probe does not easily go in the calibration container, remove the shroud. Refer to
Remove or install the shroud on page 11.
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.
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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 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.
• 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.
• 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 11. 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. Collect the
sample.
2. Rinse the probe
with deionized water.
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.
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