Hach CDC401 Series User manual

DOC022.53.80022
CDC401
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............................................................................................... 5
5.1 Calibration notes................................................................................................... 5
5.2 Calibration procedure........................................................................................... 6
Section 6 Sample measurement.........................................................................6
6.1 Sample measurement notes................................................................................. 6
6.2 Sample measurement procedure......................................................................... 7
Section 7 Verify the calibration.......................................................................... 7
7.1 Verification procedure........................................................................................... 8
Section 8 Maintenance........................................................................................... 8
8.1 Clean the probe.................................................................................................... 8
8.2 Remove or install the shroud................................................................................ 9
8.3 Storage............................................................................................................... 10
Section 9 Troubleshooting................................................................................. 10
Section 10 Consumables..................................................................................... 11
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Table of Contents
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Section 1 Product overview
The Intellical CDC401 series conductivity probes are digital electrodes that measure the electrical
conductivity, salinity, resistivity or total dissolved solids (TDS) of wastewater, drinking water and
general water samples. The probes have a graphite, 4-pole conductivity cell and a temperature
sensor. The standard probes are for laboratory use. The rugged probes are for field use. Refer to
Figure 1.
Figure 1 Probe overview
1 Temperature sensor and conductivity cell 3 Shroud (rugged model)
2 Standard probe 4 Rugged probe
Section 2 Specifications
Specifications are subject to change without notice.
Specifications Details
Probe type Graphite, 4-pole conductivity probe
Conductivity range 0.01 μS/cm to 200.0 mS/cm
Cell constant 0.40 cm-1 ±10%
Conductivity resolution 0.0 to 19.99 μS/cm: 0.01 μS/cm
20.0 to 199.9 μS/cm: 0.1 μS/cm
200 to 1999 μS/cm: 1 μS/cm
2.00 to 19.99 mS/cm: 0.01 mS/cm
20.0 to 200.0 mS/cm: 0.1 mS/cm
Conductivity accuracy ±0.5% of reading
TDS (total dissolved solids) range 0 to 50,000 mg/L as NaCl
TDS resolution 0.0 to 19.99 mg/L: 0.01 mg/L
200 to 1999 mg/L: 1 mg/L
2.00 to 19.99 g/L: 0.01 g/L
20.0 to 50.0 g/L: 0.1 g/L
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Specifications Details
TDS accuracy ±0.5% of reading
Sample salinity range 0 to 42 (ppt) (‰)
Salinity resolution 0.01 parts per thousand (ppt) (‰)
Salinity accuracy ±1 parts per thousand (ppt) (‰)
Temperature accuracy ±0.3 °C (±0.54 °F)
Operating temperature –10 to 110 °C (14 to 230 °F)
Storage temperature 5 to 40 °C (41 to 104 °F)
Minimum immersion depth 45 mm (1.77 in.)
Body material (standard) Noryl
Cable connection M12 digital output and connector
Dimensions Diameter: 15 mm (0.59 in.)
Length: 174 mm (6.9 in.) total; 90 mm (3.5 in.) below head
Cable length: CDC40101: 1 m (3.3 ft); CDC40103: 3 m (9.8 ft)
Dimensions (rugged) Diameter: 46 mm (1.8 in.)
Length: 223 mm (8.7 in.)
Cable length: CDC40105: 5 m (16.4 ft); CDC40110: 10 m
(32.8 ft); CDC40115: 15 m (49.2 ft); CDC40130: 30 m (98.4 ft)
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.
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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 as follows.
1. Rinse the probe with deionized water. Blot dry with a lint-free cloth.
2. 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.
3. Connect the probe to the meter.
Section 5 Calibration
The procedure that follows is applicable to meters that can connect to Intellical conductivity 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.
• Do not dilute conductivity standards or samples.
• The meter shows the conductivity standard solution to use for calibration. If necessary, change the
standard solution in the probe settings menu.
• The conductivity value changes with temperature. The default probe settings apply a temperature
correction to adjust the conductivity measurements to the value at 25 °C.
• 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.
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• 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.
• If the rugged probe does not easily go in the calibration container, remove the shroud. Refer to
Remove or install the shroud on page 9.
5.2 Calibration procedure
1. Go to the
calibrate menu.
Select the probe, if
applicable. The
display shows the
conductivity
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.
4. Put the probe in
the standard solution
with the sensor 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 conductivity
value of the standard
solution. The display
shows the
temperature-
corrected
conductivity 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 conductivity 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.
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• The meter can show the measured value as conductivity, TDS (total dissolved solids), salinity or
resistivity. Use the probe settings menu to change the parameter.
• If the probe is used to measure the salinity value for dissolved oxygen measurements, change the
parameter to salinity.
• The conductivity value changes with temperature. The default probe settings apply a temperature
correction to adjust the conductivity measurements to the value at 25 °C.
• 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 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 with the
sensor fully in the
sample. Do not put
the probe on the
bottom or sides of
the beaker.
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 conductivity
(or TDS, salinity,
resistivity) value of
the sample. The
display shows the
temperature-
corrected value
when the reading is
stable.
Section 7 Verify the calibration
Measure the value of a fresh conductivity standard solution to make sure the result is accurate. 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.
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7.1 Verification procedure
1. Go to the
verification menu.
The display shows
the standard solution
to use for
verification.
Note: Menu name for
HQd meters: Run check
standard.
2. Pour the fresh
standard 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 standard solution
with the sensor 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 conductivity
value of the standard
solution. The meter
accepts or rejects
the result.
Section 8 Maintenance
8.1 Clean the probe
Clean the probe regularly to remove mineral or sample buildup on the electrodes. Symptoms of
contamination:
• Incorrect or irregular readings
• Slow stabilization times
• Calibration errors
• Sample material stays on the probe
1. Rinse the probe with deionized water. Dry the probe body with a lint-free cloth.
Note: Remove the shroud on a rugged probe before cleaning. Install the shroud after the probe is clean. Refer
to Remove or install the shroud on page 9.
2. Soak the probe in the applicable cleaning solution for the specified time. Refer to Table 1.
3. Rinse or soak the probe for 1 minute in deionized water. Dry the probe body with a lint-free cloth.
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