User's Guide
ExStik® CL200A
Waterproof Total Residual Chlorine Tester
Patent Pending
Introduction
Congratulations on your purchase of the ExStik® CL200 chlorine tester.
The CL200 is a revolutionary first of its kind measurement device that
offers direct reading of Total Chlorine from 0.01 to 10.00 ppm. The
electrode method employed by the ExStik
®
is approved by the U.S.
Environmental Protection Agency (EPA) as an acceptable method for
wastewater compliance monitoring of total chlorine. For this type of
electrode method, a reagent tablet must be added to the measurement
solution before testing. The advantages of the CL200 to the user
include: Easy to use and maintain, high accuracy, self-calibration, and
fast response. The CL200 offers simultaneous Chlorine and
Temperature displays and a 15-reading memory storage. Careful use
and maintenance will provide years of reliable service.
Applications
The CL200 can be used wherever a measurement of the total chlorine
in water is needed. This is also referred to as total residual chlorine. It
measures the total of all chlorine present in all forms, including
dissolved free chlorine, chloramines, hyporchlorous acid and
hypochlorite ion. Typical applications include measurements of
discharge water from water treatment plants, public drinking water
supplies and cooling towers, and measurement of disinfectant
properties in swimming pools and cooling water applications.
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ExStikTM CL200A-EU V4.0 02/08
Meter Description
CL200 Front Panel Description
The ExStik’s
change depending on the electrode
attached (pH, ORP or Chlorine). Key
descriptions here apply for the ExStik
a chlorine electrode attache d.
1. Battery compartment
2. LCD Display
3. MODE button (store data)
4. CAL button (change temperature units
and recall data. Calibration not required
for chlorine)
5. ON/OFF button
6. Electrode Collar
7. Electrode
(Note: The Electrode cap is not shown)
®
ExStik
1. Bargraph display
2. Measurement display
3. BAT (low battery) and
HOLD (data hold) indicators
4. Temperature display
5. Bargraph scale designations
6. Unit of measure
®
keys have functions which
CL200 Display
®
with
CAUTIONS
• This device is not a toy and must not reach children’s hands. It contains hazardous
objects as well as small parts that the children could swallow. In case a child
swallows any of them, please contact a physician immediately
• Do not leave batteries and packing material lying around unattended; they can be
dangerous for children if they use them as toys
• In case the device is going to be unused for an extended period of time, remove the
batteries to prevent them from training
• Expired or damaged batteries can cause cauterization on contact with the skin.
Always, therefore, use suitable hand gloves in such cases
• See that the batteries are not short-circuited. Do not throw batteries into the fire.
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ExStikTM CL200A-EU V4.0 02/08
Getting Started
Equipment Required
A chlorine test requires a 20ml sample cup, a reagent tablet and the
CL200 with a chlorine electrode attached. The optional EX006 Weighted
base is a recommended accessory.
Battery Activation
An insulating tab is located in the battery compartment and prevents
battery drain during storage. It must be removed before use.
Measurement Procedure
Sample Preparation:
1. Place the test sample into the sample cup
up to the 20mL line.
2. Drop one reagent tablet into the sample,
wait 10 seconds and then shak e or stir
vigorously until it is dissolved.
Measurement:
1. Press the ON button and insert the electrode into the
sample.
2. Stir the sample with the electrode for 5 to 10
seconds. The “HOLD” indicator will appear after 120
seconds.
Reading:
The value in the display is the total chlorine in ppm.
Note: After running a test, wipe the entire electrode
with a clean/dry paper towel.
1.04
22.3
C
°
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ExStikTM CL200A-EU V4.0 02/08
Storing Readings
1. Press the MODE button to store a reading. The storage location
number will be displayed followed by the stored reading and the
“HOLD” indicator.
2. Only one reading can be stored during the 120 second measurement
cycle.
3. Press the MODE button again to return to normal operation.
4. If more than 15 readings are stored, previously stored readings
(starting with number 1) will be overwritten.
Recalling Stored Readings
1. Press the CAL button and the n press the MODE button immediately
after CAL is displayed; a location number (1 through 15) will flash.
2. The last stored reading taken will be displayed first. To scroll through
the stored readings, press the MODE button. The location number is
displayed first, followed by the reading stored in that location.
3. To exit the storage mode, press the CAL button and the CL200 will
return to normal operation.
Note: If the batteries are removed all stored readings will be lost.
Changing the Temperature Units
Press and hold the CAL button for approx. 3 seconds to change the
temperature units.
Auto-Power OFF
The auto power off feature automatically shuts the CL200 off 10 minutes
after the last keypress.
Low Battery Indication
When the batteries become weak the “BAT” icon will appear in the
display. Refer to the Maintenance section for battery replacement
information.
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ExStikTM CL200A-EU V4.0 02/08
Offset Adjustment Procedure
If it is necessary to adjust the chlorine reading to match the value of a
known standard or to agree with the reading from another chlorine
meter, the following procedure can be us e d .
1. Using a chlorine solution of known concentration perform the normal
sampling procedure (refer to the operator’s manual) with 20 ml of the
solution, wait for the display to read “HOLD” (approx. 2 minute
sampling time).
2. With meter still in the solution press the Mode/Hold button for
approximately 5 seconds until “CO” appears at the bottom of the
Display.
3. The concentration value on the Di splay can now be adjusted up or
down to match the actual known concentration of the solution.
4. Press the MODE/HOLD key to increase the value or Press the
CAL/RECALL button to decrease the value.
5. Once the reading is adjusted to the desired value do a quick press of
the ON/OFF button and “SA” will appear on the Display followed by
“END”. This indicates that the adjusted value was saved to memory.
6. Turn the meter off and proceed with the sampling procedure as
described in the operator’s manual.
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ExStikTM CL200A-EU V4.0 02/08
Considerations and Techniques
1. If the meter has not been used for several weeks or is new, at least
two tests should be made to condition the electrode.
2. Do not touch the reagent tablets. Touching can cause
contamination.
3. If the electrode has not been used for in a 24hr period, wipe the tip
with a clean/dry paper towel before use.
4. Before use, wash the sample cups and the caps and then rinse them
completely.
5. The CL200 should not be left in a solution while turned off. If left in
solution while turned off, subsequent readings may take longer to
reach the correct value.
6. Do not touch the sensor surface except with a clean/dry paper towel.
7. When measuring solutions that have large differences in chlorine
concentration, i.e. 0.1ppm and 5.0ppm, use separate sample cups.
8. Discard the sample cup when it shows a color change.
9. Maintain the electrode by completely wiping dry and then replacing
the electrode cover immediately after taking a measurement. The
electrode should always be stored in the dry cap.
10. Cover the connector with the clear cover whenever the electrode is
removed from the meter body.
11. Gently stirring the probe in the solution for 10 seconds, within the
first minute of operation, will accelerate the process and yield more
accurate readings. Do not stir after 10 seconds.
Troubleshooting Guide
1. If the unit appears locked it is possible that the Data Hold mode has
been inadvertently accessed. If the HOLD icon is displayed, simply
press the MODE button or turn the meter off and restart.
2. If the meter latches up and cannot be reactivated by a button press,
remove the batteries and restart. Note that if the batteries are
removed, any stored readings will be lost.
Electrodes Types
The CL200 body can also be used measure ORP and pH. To perform
these tests, the appropriate electrode must be acquired and connected
to the ExStik
®
. When the unit is turned on, it recognizes the type of
electrode that is connected and displays the appropriate unit of
measure.
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ExStikTM CL200A-EU V4.0 02/08
Maintenance
Cleaning and Maintaining the Electrode
The CL200 Chlorine Electrode arrives in a factory-cleaned condition and
is ready to be used. The electrode will perform best and yield more
stable readings after the first few tests. Before and after tests, firmly
wipe the electrode tip with a clean, dry paper towel to remove any
compounds that may have formed. When not in use, the CL200 should
be stored with the electrode cap in place.
Electrode Repl ac em e nt
The CL200 is shipped with an electrode attached. If the electrode has to
be replaced, or if a pH or ORP electrode is to be installed, follow these
steps:
1. Turn the unit off.
2. To remove an electrode, unscrew and remove the electrode collar
(turn the collar counter-clockwise).
3. Gently rock the electrode from side to side, pulling it downwards, until
it disconnects from the meter.
4. To attach an electrode, allign the slots and carefully plug the
electrode into the meter socket.
5. Tighten the electrode collar firmly enough to make a good seal (a
rubber gasket seals the electrode with the meter).
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ExStikTM CL200A-EU V4.0 02/08
Battery Replacement
1. Twist off the battery compartment cap
2. Replace the four (4) CR2032 batteries
observing polarity.
3. Replace the battery compartment cap
You, as the end user, are legally bound (Battery ordinance) to
return all used batteries and accumulators; disposal in the
household garbage is prohibited!
You can hand over your used batteries / accumulators,
gratuitously, at the collection points for our branches in your
community or wherever batteries / accumulators are sold!
Disposal
Follow the valid legal stipulations in respect of the disposal of
the device at the end of its lifecycle
Specifications
Display Multifunction LCD with Bargraph
o
Operating conditions 0 to 50
Chlorine range 0.01 to 10.00 ppm (Total Chlorine)
Chlorine accuracy 0.05 to 5.00ppm; ± (10%reading + 0.01ppm)
Temperature -5 to 90
measurement range
Temperature range 0 to 50
for Chlorine
measurement
Temp. Resolution 0.1
Temp. Accuracy ± 1oC (1.8oF) from -5 to 50oC (23 to 122oF);
Measurement storage 15 readings can be stored and recalled
Low battery indication ‘BAT’ appears on the LCD
Power Four (4) CR2032 batteries
Dimensions 35.6x172.7x40.6mm (1.4x6.8x1.6”); 110g (3.85oz)
Auto power off Automatically turns off after 10 minutes after the last key
Copyright © 2008 Extech Instruments Corporation
All rights reserved including the right of reproduction in whole or in part in any form.
C (32 to 122oF) and < 80% RH
5.00 to 10.00ppm; ± (15%reading + 0.05ppm)
o
C (23 to 194oF)
o
C (32 to 122oF)
o
up to 99.9 then 1
o
± 3
C (5.4oF) from 50 to 90oC (122 to 194oF)
press
www.extech.com
o
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ExStikTM CL200A-EU V4.0 02/08
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