Hach CL17sc User manual

DOC023.97.80645
Ultra Low Range CL17sc
09/2021, Edition 3
User Manual
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Table of Contents
English..............................................................................................................................3
Français......................................................................................................................... 28
Español.......................................................................................................................... 55
Português...................................................................................................................... 82
中文............................................................................................................................... 109
日本語........................................................................................................................... 133
한국어........................................................................................................................... 159
.................................................................................................................................. 184
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Table of Contents
1 Specifications on page 3
2 General information on page 4
3 Installation on page 7
4 Configuration on page 17
5 Operation on page 18
6 Calibration and adjustment on page 19
7 Maintenance on page 19
8 Troubleshooting on page 25
9 Replacement parts and accessories
on page 27
Section 1 Specifications
Specifications are subject to change without notice.
Table 1 General specifications
Specification Details
Dimensions (W x H x D) 32.9 x 34.2 x 17.7 cm (12.9 x 13.5 x 7.0 in.)
Enclosure IP66 per IEC 60529 with the door closed and latched1
Shipping weight 4.1 kg (9 lb) without bottles; 5.1 kg (11.2 lb) with full bottles
Mounting Wall mount
Protection class III
Pollution degree 3
Electrical installation category I (indoors)
Power requirements 12 VDC, 400 mA maximum (supplied by the controller)
Operating temperature 5 to 40 °C (41 to 104 °F)
Operating humidity 0 to 90% non-condensing relative humidity
Storage temperature -40 to 60 °C (-40 to 140 °F)
Fittings Sample line: ¼-in. OD quick-connect fitting for plastic tubing
Drain lines: slip-on fitting for ½-in. ID soft plastic tubing
Indicator lights Analyzer status and measurement cycle
Certifications EU DoC, UKCA DoC, FCC/ISED SDoC, ACMA DoC, KC, Morocco
DoC
Warranty 1 year (EU: 2 years)
Table 2 Sample requirements
Specification Details
Pressure 0.31 to 5.17 bar (4.5 to 75 psig) supplied to Y-strainer; 0.1 to 0.34 bar (1.5 to
5 psig) supplied to analyzer
Flow rate 60 to 200 mL/min through the instrument (measured at analyzer drain)
Temperature 5 to 40 °C (41 to 104 °F)
Filtration Y-strainer with 40 mesh screen or higher
1Drain holes closed with plugs for testing requirements.
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Table 3 Measurement specifications
Specification Details
Light source LED, measurement at 510 nm; 1 cm light pathlength
Measurement range 10 to 5000 ppb (µg/L) total residual chlorine as Cl2
Measurement interval 150 seconds
Accuracy ±5% or ±10 ppb from 0 to 4000 ppb (the larger value) as Cl2
±10% for higher than 4000 ppb as Cl2
Precision ±3% or ±5 ppb (the larger value) as Cl2
Limit of detection 8 ppb as Cl2
Calibration Factory calibration
Optional: 2-point user calibration with calibration standards in Calibration
Verification Kit
Reagent usage 0.5 L of buffer solution and 0.5 L of indicator solution in 31 days
Section 2 General information
In no event will the manufacturer be liable for direct, indirect, special, incidental or consequential
damages resulting from any defect or omission in this manual. The manufacturer reserves the right to
make changes in this manual and the products it describes at any time, without notice or obligation.
Revised editions are found on the manufacturer’s website.
2.1 Safety information
The manufacturer is not responsible for any damages due to misapplication or misuse of this product
including, without limitation, direct, incidental and consequential damages, and disclaims such
damages to the full extent permitted under applicable law. The user is soley responsible to identify
critical application risks and install appropriate mechanisms to protect processes during a possible
equipment malfunction.
Please read this entire manual before unpacking, setting up or operating this equipment. Pay
attention to all danger and caution statements. Failure to do so could result in serious injury to the
operator or damage to the equipment.
Make sure that the protection provided by this equipment is not impaired. Do not use or install this
equipment in any manner other than that specified in this manual.
2.1.1 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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2.1.2 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.
2.1.3 Compliance and certification
CAUTION
This equipment is not intended for use in residential environments and may not provide adequate
protection to radio reception in such environments.
Canadian Radio Interference-Causing Equipment Regulation, ICES-003, Class A:
Supporting test records reside with the manufacturer.
This Class A digital apparatus meets all requirements of the Canadian Interference-Causing
Equipment Regulations.
Cet appareil numérique de classe A répond à toutes les exigences de la réglementation canadienne
sur les équipements provoquant des interférences.
FCC Part 15, Class "A" Limits
Supporting test records reside with the manufacturer. The device complies with Part 15 of the FCC
Rules. Operation is subject to the following conditions:
1. The equipment may not cause harmful interference.
2. The equipment must accept any interference received, including interference that may cause
undesired operation.
Changes or modifications to this equipment not expressly approved by the party responsible for
compliance could void the user's authority to operate the equipment. This equipment has been tested
and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC rules.
These limits are designed to provide reasonable protection against harmful interference when the
equipment is operated in a commercial environment. This equipment generates, uses and can
radiate radio frequency energy and, if not installed and used in accordance with the instruction
manual, may cause harmful interference to radio communications. Operation of this equipment in a
residential area is likely to cause harmful interference, in which case the user will be required to
correct the interference at their expense. The following techniques can be used to reduce
interference problems:
1. Disconnect the equipment from its power source to verify that it is or is not the source of the
interference.
2. If the equipment is connected to the same outlet as the device experiencing interference, connect
the equipment to a different outlet.
3. Move the equipment away from the device receiving the interference.
4. Reposition the receiving antenna for the device receiving the interference.
5. Try combinations of the above.
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2.2 Product overview
D A N G E R
Chemical or biological hazards. If this instrument is used to monitor a treatment process
and/or dialysis feed water for which there are regulatory limits and monitoring
requirements related to public health, public safety, food or beverage manufacture or
processing, it is the responsibility of the user of this instrument to know and abide by any
applicable regulation and to have sufficient and appropriate mechanisms in place for
compliance with applicable regulations in the event of malfunction of the instrument.
The Ultra Low Range CL17sc analyzer measures the total chlorine concentration in water in the
range of 10 to 5000 ppb (µg/L) at 150 second intervals. Figure 1 gives an overview of the analyzer.
Connect the analyzer to an SC Controller for power, operation, data collection, data transmission and
diagnostics. Refer to the SC Controller manual for an overview of the controller.
Note: More than one analyzer can be connected to an SC Controller if the controller has more than one quick-
connect fitting.
Figure 1 Ultra Low Range CL17sc
1 Indicator bottle 5 Analyzer status light (Table 5 on page 7)
2 Measurement cycle lights (Table 4
on page 6)
6 Flow meter
3 Pump clamp 7 Buffer bottle
4 Tubing clip 8 Colorimetric cell
2.2.1 Measurement cycle lights
The measurement cycle lights show the step of the measurement cycle being done. Refer to Table 4.
Table 4 Measurement cycle lights
Lights on
Description The cell is flushed with
water.
The buffer solution and the
indicator solution are added to
the cell.
The sample is measured.
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2.2.2 Analyzer status light
The analyzer status light changes from green to yellow when there is a warning or to red when there
is an error. Refer to Table 5.
Table 5 Analyzer status light
Color Description
Green Normal operation
Yellow The system needs attention to prevent a failure in the future. Measurements continue.
To show the warnings, push menu and select DIAGNOSTICS > [select analyzer] >
WARNING LIST. Refer to Warnings—Yellow light on page 26.
Red The system needs immediate attention. Measurements have stopped.
To show the errors, push menu and select DIAGNOSTICS > [select analyzer] > ERROR
LIST. Refer to Errors—Red light on page 25.
2.3 Product components
Make sure that all components have been received. Refer to Figure 2. If any items are missing or
damaged, contact the manufacturer or a sales representative immediately.
Figure 2 Product components
1 Ultra Low Range CL17sc analyzer 3 Tubing Kit (tubing harness and stir bar)
2 Installation kit
2.4 Intended use
The Hach Ultra Low Range CL17sc is intended for use by water treatment professionals who need to
make sure that there is a consistently-low level of total chlorine in process water to prevent damage
to product quality, prevent equipment damage caused by chlorine exposure and/or make sure of
regulatory compliance.
Section 3 Installation
CAUTION
Multiple hazards. Only qualified personnel must conduct the tasks described in this
section of the document.
3.1 Installation guidelines
• The analyzer is supplied with a standpipe installation kit or a pressure regulator installation kit to
control the water pressure to the analyzer. The user selects the installation kit at the time of
purchase.
• Install the analyzer indoors in an environment with minimum vibration. Refer to the operating
temperature and humidity specifications in Specifications on page 3.
• Do not install the analyzer in direct sunlight or near a heat source.
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• For standpipe installations, install the analyzer in a location with 61 cm (2 ft) of free space above
the analyzer for the standpipe mounting.
• Install the analyzer near an open drain. Refer to local regulatory agency instructions for disposal.
3.2 Icons used in illustrations
Manufacturer
supplied parts
User supplied
parts Look Do steps in reverse order Do not use tools
3.3 Step 1: Air purge (optional)
Air purge may be necessary if the analyzer is installed in a location with high humidity and/or fumes
that cause corrosion. The air purge keeps positive pressure in the instrument with dry and clean air.
Supply clean, dry instrument-quality air at 0.003 m3/minute (0.1 ft3/minute) at 20 psig maximum.
Refer to the illustrated steps that follow. The 3/8-inch quick-connect fitting and tubing is supplied by
the user.
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3.4 Step 2: Mount and plumb the analyzer
CAUTION
Only the tubing specified by Hach Company may be used with the instrument. Other
tubing may absorb chlorine that is in the sample water and have a negative effect on
chlorine readings (decrease the chlorine readings).
N O T I C E
Incorrect plumbing of the analyzer can cause damage because of excess sample pressure. Always
obey the instructions that follow to mount and plumb the analyzer.
1. Attach the analyzer (item 9) to a wall with four screws. Make sure that the analyzer is level.
Note: The user supplies the mounting hardware.
2. Attach the SC Controller (item 7) to a wall, panel or pipe. Refer to the SC Controller
documentation for instructions.
3. Assemble the Y-strainer. Refer to the instructions on the packing list.
4. Use the 1-inch conduit clamp to mount the Y-strainer assembly (item 5 in Figure 3 or Figure 4).
5. Install the external air break on the analyzer (item 2 in Figure 3 or Figure 4). Refer to the
instructions on the packing list.
6. Do step 7 or 8.
7. If a standpipe installation kit was selected at the time of purchase, install the standpipe as follows:
a. Assemble the standpipe. Refer to the instructions on the packing list.
b. Use the smaller conduit clamp to mount the standpipe assembly a minimum of 61 cm (24 in.)
above the top of the analyzer. Refer to item 10 in Figure 3.
c. With the black tubing, install the sample bypass tubing (item 8). Push the tubing behind and
then into the standpipe. Put the tubing 10–13 cm (4–5 in.) in the top of the standpipe.
d. Cut a length of tubing from the sample drain tubing (item 3). Use the tubing to plumb the
bottom of the standpipe to an open drain (item 11 in Figure 3). Refer to Drain line guidelines
on page 12.
8. If a pressure regulator installation kit was selected at the time of purchase, install the pressure
regulator (item 10 in Figure 4).
9. With the black tubing, connect the Y-strainer inlet (item 5) to the sample source.
Refer to Sample line guidelines on page 12 and Sample requirements on page 12.
10. With the black tubing, connect the Y-strainer outlet (or the outlet of the pressure regulator) to the
sample inlet fitting (item 1) on the bottom of the analyzer. Make the tubing as short as possible
and a maximum of 2.5 m (8 ft).
11. If a pressure regulator was installed, install the sample bypass tubing (item 8 in Figure 4).
12. Assemble and plumb the grab sample assembly (item 4) as follows:
a. Assemble the grab sample assembly.
b. Plumb the tee fitting between the Y-strainer and the analyzer. Refer to Figure 3 or Figure 4.
13. Plumb the sample drain tubing (item 3) to an open drain. Refer to Drain line guidelines
on page 12.
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Figure 3 Installation with a standpipe
1 Sample inlet tubing 7 SC Controller
2 External air break 8 Sample bypass tubing
3 Sample drain tubing 9 Analyzer
4 Grab sample assembly 10 Standpipe
5 Y-strainer assembly 11 Standpipe drain tubing
6 Shut-off valve at Y-strainer inlet
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Figure 4 Installation with a pressure regulator
1 Sample inlet tubing 6 Shut-off valve at Y-strainer bypass
2 External air break 7 SC Controller
3 Sample drain tubing 8 Sample bypass tubing
4 Grab sample assembly 9 Analyzer
5 Y-strainer assembly 10 Pressure regulator
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3.4.1 Sample line guidelines
Select a good, representative sampling point for the best instrument performance. The sample must
be representative of the entire system.
To prevent erratic readings:
• Collect samples from locations that are sufficiently distant from points of chemical additions to the
process stream.
• Make sure that the samples are sufficiently mixed.
• Make sure that all chemical reactions are complete.
• Install the analyzer as near the sample source as possible (4.6 m (15 ft) maximum).
3.4.2 Sample requirements
The water from the sample source(s) must agree with the specifications in Specifications on page 3.
Keep the sample flow rate and operating temperature as constant as possible for best performance.
3.4.3 Drain line guidelines
N O T I C E
Incorrect installation of the drain lines can cause liquid to go back into the instrument and cause
damage.
• Make sure to install the external air break. Refer to Figure 3 on page 10 or Figure 4 on page 11.
• Make the drain lines as short as possible.
• Make sure that the drain lines have a constant slope down.
• Make sure that the drain lines do not have sharp bends and are not pinched.
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3.5 Step 3: Install the stir bar and tubing harness
Do the illustrated steps that follow.
3.6 Step 4: Install the reagent bottles
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.
Items to collect:
• Personal protective equipment (refer to MSDS/SDS)
• Indicator bottle
• Buffer bottle
• DPD compound bottle
1. Put on the personal protective equipment identified in the safety data sheets (MSDS/SDS).
2. Install the buffer bottle on the right side and the indicator bottle on the left side. Refer to the
illustrated steps that follow.
Note: (Optional) Use the top of the analyzer as a shelf.
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3.7 Step 5: Set the sample flow to on
1. Slowly turn the shut-off valve(s) to the open position ¼ turn.
2. Make sure that there are no leaks at the plumbing connections. If there is a leak, push the tube
farther into the fitting or tighten the connection with a wrench.
3. For standpipe installations, do the steps that follow:
a. Fully open the shut-off valve at the Y-strainer outlet.
b. Turn the shut-off valve at the Y-strainer inlet (item 6 in Figure 3 on page 10) until a small
stream of water comes out of the standpipe drain tubing.
4. For pressure regulator installations, do the steps that follow:
a. Fully open the shut-off valves at the Y-strainer inlet and outlet.
b. Turn the shut-off valve at the Y-strainer bypass (item 6 in Figure 4 on page 11) until a small
stream of water comes out of the Y-strainer bypass tubing.
3.8 Step 6: Electrical installation
3.8.1 Connect the analyzer to the controller
WARNING
Electrical shock hazard. Externally connected equipment must have an applicable
country safety standard assessment.
Connect the analyzer cable to the quick-connect fitting of the SC controller. Refer to Figure 5.
Keep the connector cap to seal the connector opening in case the cable must be removed.
Note: Extension cables are available. Refer to Replacement parts and accessories on page 27. The maximum
cable length is 15 m (49 ft).
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Figure 5 Connect the cable to a quick-connect fitting
3.8.2 Connect the controller to power
Connect the controller to line power by hard-wiring in conduit or wiring to a power cord. Refer to the
controller documentation for instructions.
3.8.3 Connect external devices to the controller
Connect the controller relays, analog outputs and digital inputs to external devices as necessary.
Refer to the controller documentation for instructions.
3.9 Step 7: Set up and prime the analyzer
1. Push menu, then select SENSOR SETUP > [select analyzer] > PRIME.
2. If the controller does not recognize the analyzer is connected, do the steps that follow:
a. Push menu, then select TEST/MAINT > SCAN SENSORS.
b. When the sensor is found and installed, do step 1 again.
3.10 Step 8: Set the flow rate
The analyzer has a flow meter that measures the sample flow through the analyzer. Refer to Figure 1
on page 6.
1. Push the RIGHT arrow on the controller to show the flow rate on the display.
Sample flows through the analyzer only when the analyzer flushes the cell. At other times, there
is no sample flow and the flow rate shown is zero. Refer to Table 4 on page 6 for descriptions of
the measurement cycle steps.
Note: To manually measure the flow rate through the analyzer, measure the flow rate at the analyzer drain
when the analyzer flushes the cell with water.
2. For standpipe installations, turn the shut-off valve at the Y-strainer outlet to set the flow rate
between 60 and 200 mL/min when the analyzer flushes the cell with water.
3. For pressure regulator installations, adjust the pressure regulator to set the flow rate between
60 and 200 mL/min when the analyzer flushes the cell with water.
3.11 Step 9: Install the latest software
Make sure that the SC Controller has the latest software installed. Use an SD card to install the latest
software on the SC Controller.
1. Go to the product page for the applicable SC Controller on http://hach.com.
2. Click the "Downloads" tab.
3. Scroll down to "Software/Firmware".
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4. Click the link for the SC Controller software.
5. Save the files to an SD card.
6. Install the files on the SC Controller. Refer to the software installation instructions supplied with
the software files.
Section 4 Configuration
4.1 Step 10: Configure the analyzer
Set the analyzer name, measurement units, signal average, bubble reject, chlorine alarm setpoints
and chlorine exposure alarm setpoint.
1. Push menu, then select SENSOR SETUP > [select analyzer] > CONFIGURE.
2. Select and configure each option.
Option Description
EDIT NAME Sets the name of the analyzer. The name of the analyzer shows on the
controller display and in the log files.
MEAS UNITS Sets the measurement units that show on the display. Options: ppb
(default) or ppm
SIGNAL AVERAGE Sets the number of measurements used to calculate the average
measurement shown on the display. Options: 1 (default), 2, 3 or
IRREGULAR VALUE.
When SIGNAL AVERAGE is set to 1, signal averaging is disabled.
When SIGNAL AVERAGE is set to 2 or 3, an average reading shows on
the display. For example, the measurement on the display is equal to the
last and previous measurement divided by two when SIGNAL AVERAGE
is set to 2.
When SIGNAL AVERAGE is set to IRREGULAR VALUE, the analyzer
rejects a reading that is unusually higher or lower than the latest
readings. When a reading is rejected, the last good reading shows on the
display and is saved to the data log. No more than three consecutive
readings are rejected.
Signal averaging corrects for incorrect reading fluctuations that are
caused by bubbles and/or larger particles in the sample.
BUBBLE REJECT Sets the bubble reject to on or off (default). Set BUBBLE REJECT to ON
to decrease noise caused by bubbles in the sample. Air bubbles in the
sample can cause the readings to not be stable.
HIGH CL ALARMS Sets the chlorine concentration setpoint for the HIGH CHLORINE alarm
—0.00 to 10.00 ppm (or 0 to 9999 ppb). Default: 0.10 ppm (or 100 ppb).
To calculate the maximum chlorine concentration necessary for a
specified membrane life (e.g., 3 years), use the equation that follows:
Chlorine (ppm) = Membrane chlorine exposure limit (ppm*hr) ÷ hours
Where: hours = membrane life in years × 365 days/year × 24 hours/day
For example: If the membrane chlorine exposure limit is 1000 ppm*hr
and the membrane life is 3 years, the maximum chlorine concentration is
0.038 ppm (or 38 ppb).
LOW CL ALARMS Sets the chlorine concentration setpoint for the LOW CHLORINE alarm—
0.00 to 10.00 ppm (or 0 to 9999 ppb). Default: 0.00 ppm (or 0 ppb)
SENSOR INFO Shows the analyzer serial number, software version, boot version and
driver version.
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Option Description
CL2 EXPOSURE VIEW CL2 HISTORY—Shows the values that follow:
• CURRENT VALUE—CL2 exposure count on the home screen
• LAST SAVED VALUE—CL2 exposure count saved when the CL2
exposure count was set to zero. A maximum of three CL2 exposure
counts and their related start and end dates show on the display.
Note: LAST SAVED VALUE shows 0.00 ppm*hr and the date and time the
instrument was first set to on until the CL2 exposure count is set to zero.
SET EXPOSURE LIMIT—Sets the chlorine exposure alarm setpoint.
Enter the membrane chlorine exposure limit supplied by the membrane
manufacturer. When the CL2 exposure count on the home screen is
more than the CL2 exposure alarm setpoint, a HIGH EXPOSURE
warning occurs. Refer to Warnings—Yellow light on page 26.
RESET TO ZERO—Sets the CL2 exposure count on the home screen to
zero. In addition, saves the last CL2 exposure count to the VIEW
CL2 HISTORY screen.
DEFAULT
SETTINGS
Select YES to change the configuration settings back to the factory
default values.
SERVICE For service use only
4.2 System configuration
Refer to the controller documentation for system configuration, general controller settings and setup
for outputs and communications.
4.3 User navigation
Refer to the controller documentation for keypad description and navigation information.
Push the RIGHT arrow key on the controller multiple times to show more information on the home
screen and to show a graphical display.
Section 5 Operation
5.1 Show the chlorine exposure
1. Push home to show the home screen.
2. Push the RIGHT arrow key until "FLOW RATE" and "CL2 EXPOSURE" show on the display.
Note: The CL2 exposure count on the home screen increases after each chlorine measurement. If the last
chlorine measurement was 40 ppb, the CL2 exposure count increases by 40 ppb x 1/24 hour = 1.67 ppb*hr (or
0.00167 ppm*hr).
The chlorine measurement is multiplied by 1/24 because the analyzer completes 24 measurements each hour.
3. Scroll down to select CL2 EXPOSURE, then push the RIGHT arrow key to show a trend chart.
4. To change the time or measurement range of the trend chart, push the home key when the trend
chart shows on the display.
5. To go back, push the LEFT arrow key or home.
5.2 Data, event and service logs
Note: During the first hours after installation, the chlorine measurement on the display may be 0.00 ppm (or 0 ppb),
but the actual chlorine concentration is higher. The low chlorine measurement is caused by the chlorine demand of
the new sample tubing and system.
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The controller provides access to a data log, event log and service log for each connected
instrument. The analyzer measurements are saved automatically to the data log at 150 second
intervals. The event log shows the events that have occurred. The event and data logs keep
approximately 2 weeks of data when the analyzer operates continuously. The service log keeps
approximately 24 hours of data when the analyzer operates continuously.
Refer to the controller documentation to download the data log, event log and/or service log. The
data log is an XML file that can be saved in CSV or Excel format. The event log and service log are
files in CSV format.
5.3 Modbus registers
A list of Modbus registers is available for network communication. Refer to the manufacturer's
website for more information.
5.4 Measure a GRAB SAMPLE IN
When necessary, use the GRAB SAMPLE IN menu to add a water sample of known chlorine
concentration to the cell for measurement. Measure a grab sample for verification or to measure a
water sample collected from another location.
1. Push menu, then select SENSOR SETUP > [select analyzer] > GRAB SAMPLE IN.
2. Complete the steps that show on the display. When prompted, remove the cell lid and add
100 mL of the grab sample to the cell. Some of the sample will flow to the sample drain.
Section 6 Calibration and adjustment
The calibration curve of the analyzer is set at the factory for performance to specifications.
Calibration can be done for performance verification.
No user adjustments to the factory calibration curve are recommended unless required by a
regulatory agency for compliance reporting purposes, or a large repair of the analyzer is done.
For more information, refer to the instructions in the Calibration Verification Kit or contact technical
support.
Section 7 Maintenance
CAUTION
Multiple hazards. Only qualified personnel must conduct the tasks described in this
section of the document.
N O T I C E
Do not disassemble the instrument for maintenance. If the internal components must be cleaned or
repaired, contact the manufacturer.
7.1 Maintenance schedule
Table 6 shows the recommended schedule of maintenance tasks. Facility requirements and
operating conditions may increase the frequency of some tasks.
Table 6 Maintenance schedule
Task 1 month 6 months As necessary
Clean the cell on page 20 X2
Replace the reagent bottles on page 21 X
2Clean the cell more or less frequently as necessary.
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Table 6 Maintenance schedule (continued)
Task 1 month 6 months As necessary
Replace the stir bar and tubing harness3X
Clean the screen in the Y-strainer on page 22 X
7.2 Clean the cell
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.
Clean the cell at 1-month intervals or more frequently if necessary.
Items to collect:
Cotton swabs45.25 N Sulfuric Acid Solution5
1. Put on the personal protective equipment identified in the safety data sheets (MSDS/SDS).
2. Push menu, then select SENSOR SETUP > [select analyzer] > TASKS > CLEAN CELL.
Note: To stop a selected task, push home.
3. Push enter to stop measurements.
4. Select an option.
Option Description
HOLD The controller outputs are held at the last measured value.
TRANSFER The controller outputs change to the transfer value.
5. When the status light flashes, do the illustrated steps that follow. When done, push enter.
At illustrated step 5, make sure that there is no unwanted material in the cell. Use a flashlight to
look for unwanted material as necessary.
3Refer to the instructions supplied with the Tubing Kit.
4Refer to Replacement parts and accessories on page 27.
5Do not use other cleaning solutions. Refer to Replacement parts and accessories on page 27.
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