Instruction Manual: Portable Colorimeter

Instruction Manual
C401/301/201/101/102/103/104/105
Portable Colorimeter
68X357704
Rev 1 05/05
Technology Made Easy ...
Preface
This manual functions in two ways: first as a step by step guide to help
you operate the waterproof C401/301/201/101/102/103/104/105
Colorimeter; second, it serves as a handy reference guide.
It contains basic instructions that you must follow during the operation,
care and maintenance of the instrument. The safety protection provided by
this equipment may be impaired if it is used in a manner not described in
this manual. It is recommended that all operators should read this manual
prior to working with this instrument.
Eutech Instruments/ Oakton Instruments cannot accept any responsibility
for damage or malfunction to the meter caused by improper use of the
instrument.
The information presented in this manual is subject to change without
notice as improvements are made, and does not represent a commitment
on the part of Eutech Instruments Pte Ltd/ Oakton Instruments.
Note: Eutech Instruments Pte Ltd/ Oakton Instruments reserves the
right to make improvements in design, construction, and appearance
of our products without notice.
Copyright © 2004 All rights reserved.
Eutech Instruments Pte Ltd
Oakton Instruments
Rev. 1 05/05
TABLE OF CONTENTS
1
INTRODUCTION .......................................................................................................................... 1
1.1
1.2
1.3
1.4
2
UNPACKING C401/301/201/101/102/103/104/105 COLORIMETER AND ACCESSORIES .............................2
DISPLAY .................................................................................................................................................3
KEYS AND FUNCTIONS ............................................................................................................................4
BATTERY INSTALLATION ..........................................................................................................................5
MEASUREMENT ......................................................................................................................... 6
2.1
GENERAL INFORMATION ..........................................................................................................................6
2.2
PREPARATION OF SAMPLE VIAL ...............................................................................................................7
2.3
MEASUREMENT PROCEDURE ..................................................................................................................7
2.4
CHLORINE, FREE & TOTAL (0 – 6PPM CL2)...............................................................................................9
Chlorine, Free & Total Measuring Hints & Tips ...........................................................................................11
2.4.1
Sample Collection ..........................................................................................................................11
2.4.2
Sample Measurement ....................................................................................................................11
2.4.3
Interferences ..................................................................................................................................11
2.4.4
Accuracy Check / User Calibration ................................................................................................13
2.4.5
Chemistry .......................................................................................................................................14
2.5
CYANURIC ACID (5-90 PPM) ..................................................................................................................15
Cyanuric Acid Measuring Hints & Tips ........................................................................................................17
2.5.1
Sample Collection ..........................................................................................................................17
2.5.2
Sample Measurement ....................................................................................................................17
2.5.3
Interferences ..................................................................................................................................17
2.5.4
Accuracy Check / User Calibration ................................................................................................17
2.5.5
Chemistry .......................................................................................................................................18
2.6
PH (5.9-8.2 PH UNITS)..........................................................................................................................19
pH Measuring Hints & Tips ..........................................................................................................................21
2.6.1
Sample Collection ..........................................................................................................................21
2.6.2
Sample Measurement ....................................................................................................................21
2.6.3
Interferences ..................................................................................................................................21
2.6.4
Accuracy Check / User Calibration ................................................................................................21
2.6.5
Chemistry .......................................................................................................................................22
2.7
CHORINE DIOXIDE (0 – 11.4 PPM CLO2) ................................................................................................23
Chlorine Dioxide Measuring Hints & Tips ....................................................................................................25
2.7.1
Sample Collection ..........................................................................................................................25
2.7.2
Sample Measurement ....................................................................................................................25
2.7.3
Interferences ..................................................................................................................................25
2.7.4
Accuracy Check / User Calibration ................................................................................................27
2.8
BROMINE (0 – 13.5PPM BR2) .................................................................................................................29
Bromine Measuring Hints & Tips .................................................................................................................31
2.8.1
Sample Collection ..........................................................................................................................31
2.8.2
Sample Measurement ....................................................................................................................31
2.8.3
Interferences ..................................................................................................................................31
2.8.4
Accuracy Check / User Calibration ................................................................................................33
2.9
OZONE (0 – 4.1 PPM O3) .......................................................................................................................34
Ozone Measuring Hints & Tips ....................................................................................................................36
2.9.1
Sample Collection ..........................................................................................................................36
2.9.2
Sample Measurement ....................................................................................................................36
2.9.3
Interferences ..................................................................................................................................36
2.9.4
Accuracy Check / User Calibration ................................................................................................38
3
CALIBRATION........................................................................................................................... 39
3.1
3.2
3.3
3.4
3.5
4
5
CALIBRATION PROCEDURE ....................................................................................................................39
CHLORINE, FREE & TOTAL, CHLORINE DIOXIDE, BROMINE AND OZONE ...................................................40
CYANURIC ACID ....................................................................................................................................43
PH .......................................................................................................................................................46
RESTORING FACTORY CALIBRATION ......................................................................................................49
TROUBLESHOOTING GUIDE .................................................................................................. 51
ROUTINE MAINTENANCE........................................................................................................ 52
5.1
VIALS – HANDLING, CLEANING AND CARE ..............................................................................................52
6
ACCESSORIES ......................................................................................................................... 53
7
SPECIFICATIONS ..................................................................................................................... 54
8
WARRANTY............................................................................................................................... 56
9
RETURN OF ITEMS................................................................................................................... 56
Introduction
C401/301/201/101/102/103/104/105 Colorimeter
1 INTRODUCTION
Thank you for selecting the waterproof portable C401/301/201/101/
102/103/104/105 Colorimeter. Depending on the model selected, the
C401/301/201/101/102/103/104/105 Colorimeter series allows you to
measure up to seven parameters - namely the Free Chlorine, Total
Chlorine, Cyanuric Acid, pH, Chlorine Dioxide, Bromine and Ozone of an
aqueous sample in the field. You have one of the following models:
• C101: pH measurement
• C102: Cyanuric Acid measurement
• C103: Chlorine Dioxide measurement
• C104: Bromine measurement
• C105: Ozone measurement
• C201: Free Chlorine and Total Chlorine measurement
• C301: Free Chlorine, Total Chlorine and pH measurement
• C401: Free Chlorine,
measurement
Total
Chlorine,
1
Cyanuric
Acid
and
pH
Introduction
C401/301/201/101/102/103/104/105 Colorimeter
1.1
Unpacking C401/301/201/101/102/103/104/105 Colorimeter
and Accessories
The table below indicates the items that you should find in your
Colorimeter shipment.
Item
Qty
C401
C301
C201
C101
C102
C103
C104
C105
1
●
●
●
●
●
●
●
●
1
●
●
●
●
●
●
●
●
1
●
●
●
●
●
●
●
●
4
●
●
●
●
●
●
●
●
●
●
●
1.
Colorimeter with 4 “AAA”
batteries
2.
Instruction Manual
3.
Instrument Carrying Case
4.
Empty Vial
5.
pH Indicator (Phenol Red)
Kit
1
●
6.
Cyanuric Acid Reagent Kit
1
7.
Chlorine, Free (DPD)
Reagent Kit
1
●
●
●
●
8.
Chlorine, Total (DPD)
Reagent Kit
1
●
●
●
9.
Chlorine Dioxide (Glycine)
Reagent Kit
1
●
●
●
●
Remove C401/301/201/101/102/103/104/105 Colorimeter from the
packing carton. Carefully inspect all items to ensure that no visible
damage has occurred during shipment. If the items you received do not
match your order, please contact your nearest distributor immediately.
WARNING: Extra care should be taken when unpacking, opening, and
handling the sample vials. Surface scratches or finger smudges on the vial
surface may cause measurement errors. Handle these items by their caps
only.
Batteries provided with the meter package are to be installed prior to use.
See Section 1.4 Battery Installation on page 5.
In the next page, Figure 1 depicts the meter. The three main components
of the instrument are the sample well, the display, and the keypad. The
following sections will describe the functionality of the display and the
keypad. The proper use of the instrument will be discussed in later
sections.
2
Introduction
C401/301/201/101/102/103/104/105 Colorimeter
Sample Vial
Sample Well
Meter Index
Marking
Liquid Crystal
Display
Keypad
Figure 1: Parts of C401/301/201/101/102/103/104/105 Colorimeter
1.2
Display
All the LCD segments and annunciators that can appear on the display are
shown in Figure 2. The display is used for reporting the colorimeter
reading, communicate error messages and provide guidance for the
operation of the instrument.
Calibration Mode
Annunciator
Battery Indicator
CAL
ppm
pH
14-segment Liquid Crystal Display
Figure 2: Customized LCD when switched on
3
Units of
Measure
Introduction
C401/301/201/101/102/103/104/105 Colorimeter
1.3
Keys and Functions
The keypad has four keys: ON/OFF, MODE, ZERO and READ/ENTER.
Keys
Functions
ON/OFF
-
Powers on and shuts off the meter. With the auto switch-off feature
the meter automatically shuts off 10 minutes after last key press.
MODE
-
Selects the test to be performed.
-
Selects the calibration point in an incremental circular manner during
calibration.
-
Blanks the instrument (sets the meter to zero) before chemical
reagent is added.
-
Initiates the calibration mode when used with the ON/OFF key.
-
Aborts the calibration process without saving.
-
Exits the calibration mode.
-
Initiates the measurement of the sample after the chemical reagent
has been added.
-
Confirms the test selection.
ZERO
READ /
ENTER
WATERPROOF
READ
ENTER
ON
OFF
ZERO
MODE
Figure 3: C401/301/201/101/102/103/104/105 Keypad
4
Introduction
C401/301/201/101/102/103/104/105 Colorimeter
1.4
Battery Installation
Four AAA-sized batteries are included in your meter’s packaging:
1. Use a Philips screwdriver to remove the two screws holding the
battery cover. See Figure 4 : Battery Installation.
2. Remove the battery cover.
3. Insert the batteries. Follow the diagram inside the cover for correct
polarity.
4. Replace the battery cover onto its original position using the two
screws removed earlier.
5. The meter is now ready to operate.
Philips Screws
Battery cover
Four 'AAA'-sized batteries
Figure 4 : Battery Installation
NOTE: Dispose used batteries in accordance with your local regulations.
5
Measurement
C401/301/201/101/102/103/104/105 Colorimeter
2 MEASUREMENT
2.1
General Information
The waterproof C401/301/201/101/102/103/104/105 Colorimeter allows
you to measure up to seven parameters - namely the pH, Cyanuric acid,
Free Chlorine, Total Chlorine, Chlorine Dioxide, Bromine and Ozone of a
sample and reports the results in appropriate units (ppm or pH). Each
specific measurement has its own range as listed in the specifications.
The meter will go through a power sequence as shown below.
Meter’s Model Number
Meter’s Revision Number
Measurement Mode Selection
Figure 5: Example of C401 Colorimeter power up sequence
An accurate colorimeter measurement depends on good measurement
techniques. Factors such as clean sample vials, positioning of vial in the
sample well, using a vial with a light shield cap, meter calibration, handling
of meter, and others, have to be taken into consideration.
NOTE: Do not pour liquid directly into the sample well of the instrument.
Always use a vial. The instrument will only accurately measure the sample
when vials sealed with the black caps are used. The black cap serves as
both seal and a light shield.
NOTE: Do not attempt to clean the sample well. The optics may be
damaged.
NOTE: This instrument is designed to measure solutions contained in the
custom made glass vials and therefore the use of other type of sample vials
or sample cells may result in inaccurate measurements.
NOTE: Reagents’ MSDS can be obtained from
http://www.eutechinst.com/techtips/msds.htm
6
Measurement
C401/301/201/101/102/103/104/105 Colorimeter
2.2
Preparation of Sample Vial
1.
Obtain a clean and dry sample vial (Figure 6).
2.
Take care to handle the sample vial by the top.
3.
Rinse the vial with approximately 10 ml of the sample
water, capping the vial with the black screw cap and gently
inverting it several times. Discard the used sample and
repeat the rinsing procedure two more times.
4.
Fill the rinsed vial with the remaining portion (approximately
10 ml) of the grab sample up to the mark indicated in the
vial. Cap the vial with the supplied black screw cap.
5.
Wipe the vial with a soft, lint-free cloth. Ensure that the outside of the
vial is dry, clean and free from smudges.
6.
You are now ready to place the vial into the meter for measurement.
2.3
Measurement Procedure
1.
Place C401/301/201/101/102/103/104/105 Colorimeter on a flat and
level surface.
2.
Place the sample vial inside the sample well and align the vial’s mark
with the meter’s index mark. See Figure 8.
Align index mark on
the sample vial with
the index mark on
the colorimeter and
push till it is fully
snapped in
IMPORTANT:
Place meter on a flat
and level surface.
DO NOT hold it on
hands while operating
the meter. It may lead to
inaccurate readings
Figure 8: Sample vial index alignment to the meter's index mark
3.
Push the vial until it is fully snapped in.
7
Figure 6:
Sample Vial
Measurement
C401/301/201/101/102/103/104/105 Colorimeter
4.
Turn on the meter by pressing the ON/OFF key.
5.
For the single-parameter colorimeter, the display will momentarily
show the test to be performed before switching directly to [STbY] as
that of step 6. For the multi-parameter colorimeter, the display will
indicate the last test performed. Press the MODE key to make
selection on the desired test to be performed.
6.
Press the READ/ENTER key to confirm your selection. The meter will
display [STbY] indicating it is ready to accept a measurement or a
blanking.
7.
Press the ZERO key to perform the blanking of the meter. If the user
chooses to skip this step, the meter will use the last value of the
blank for the next calculation.
8.
Remove the sample vial used for blanking from the instrument and
add the appropriate reagent to it. Cap the vial and follow the
appropriate instructions (including the time required to develop the
color) for each type of reagents.
9.
Place the vial with the developed color into the sample well and align
the ▼ mark on the vial with the ▲ mark on the instrument, and press
it down until it snaps fully into the optical holder.
10. Press the READ/ENTER key. The meter will display the reading in
appropriate units within 3 seconds.
11. To repeat the measurement of the same sample, repeat steps 7-11.
Ideally, step 7 should not be skipped, but the user may do so if
testing the same sample.
8
Measurement: Chlorine, Free & Total
C401/301/201Colorimeter
2.4
Chlorine, Free & Total (0 – 6ppm Cl2)
•
DPD method1 for Free Chlorine - applicable to water, treated water,
estuary water and seawater.
•
DPD method1 for Total Chlorine - applicable to water, treated
water, wastewater, estuary water and seawater.
The DPD Method is USEPA accepted for reporting drinking water
analyses (Free and Total Chlorine) and wastewater analyses2 (Total
Chlorine only).
Note: 1Adapted from “Standard methods for the Examination of Water and
Wastewater.”
Note: 2Procedure is equivalent to USEPA method 330.5 for wastewater and
Standard Method 4500-Cl G for drinking water.
1.
Switch the meter on by pressing the ON/OFF key.
2.
Press the MODE key repeatedly until [CL – F] is displayed (for Free
Chlorine determination) or [CL – T] is displayed (for Total Chlorine
determination).
3.
Press the READ/ENTER key to confirm the desired test parameter.
The meter will read [STbY] indicating it is in stand-by mode, waiting
for either blanking or measurement.
READ
ENTER
Free Chlorine test selection
4.
Select a clean and dry vial, un-screw the cap and fill with sample
water to the line on the vial. Replace the cap, ensuring it is screwed
on finger tight to the vial.
5.
Ensure the outside of the vial is clean, dry and absent of any marks
or finger-prints. Gently push the vial fully into the sample well of the
instrument, whilst aligning the ▼ mark on the vial with the ▲ mark on
the meter.
6.
Press the ZERO key to initiate blanking of the meter. The display will
show [ZERo] while blanking is taking place.
Note: The meter will store and use the last blanking (or zero) value, even if it
is turned off, or if the batteries are removed.
ZERO
Blanking
Sample
ppm
9
Measurement: Chlorine, Free & Total
C401/301/201Colorimeter
7.
Remove the vial from the meter and add into it the content of one
Chlorine, Free (DPD) Reagent Sachet (for Free Chlorine
determination) or the content of one Chlorine, Total (DPD) Reagent
Sachet (for Total Chlorine determination).
8.
Replace the cap, ensuring it is screwed on finger tight to the vial.
Invert the vial repeatedly for approximately 20 seconds, until the
powder has dissolved.
Note: A small amount of the powder may remain un-dissolved in the vial, but
this will not affect the measurement.
Add content of one Chlorine, Free (DPD) Reagent Sachet
(for Free Chlorine determination) or one Chlorine, Total
(DPD) Reagent Sachet (for Total Chlorine determination).
9.
Invert vial approximately 20
seconds until powder dissolves
Gently push the vial back fully into the sample well of the meter,
whilst again aligning the ▼ mark on the vial with the ▲ mark on the
meter.
10. For Free Chlorine determination, press the READ/ENTER key within
two minutes from the time the DPD Free reagent was added to the
vial.
11. For Total Chlorine determination, wait for two minutes and then press
the READ/ENTER key within four minutes from the time the DPD
Total reagent was added to the vial.
12. The meter will flash either [CL-F] or [CL-T], depending on which test
is being performed, whilst the measurement is taken. It will then
display the Chlorine concentration in parts per million (ppm) Cl2.
Free
Chlorine
Sample
READ
ENTER
ppm
Free Chlorine determination
10
Measurement: Chlorine, Free & Total
C401/301/201Colorimeter
Chlorine, Free & Total Measuring Hints & Tips
2.4.1 Sample Collection
Chlorine determination must take place as soon as possible after the
sample is taken or else low results may be obtained.
Plastic containers should not be used to collect the sample because these
may have a high chlorine demand which will lead to low reading results. It
is advisable to wash the container with sample water before the sample is
collected.
Avoid agitating the sample excessively as this may also lead to low
results.
2.4.2 Sample Measurement
If the pink color forms and then rapidly fades, this is an indication that the
chlorine concentration may be very high. If this is the case, dilute the
sample with de-ionized water and retest. Multiply the result by the dilution
factor used.
Example: if the sample was diluted 2:1 with de-ionized water (i.e. 1 part
sample water to 1 part de-ionized water), the result is multiplied by 2 to
give the true concentration of the original sample.
Note: Results obtained by this method will not be as accurate as stated in
this manual because some chlorine will be lost in the dilution process.
After use, the vial should be cleaned thoroughly to avoid contaminating the
next sample. Do not use household cleaners as these may have a
chlorine demand which will lead to low results on subsequent tests.
After testing Total Chlorine, give extra attention to cleaning the vial as any
residual reagent will affect any subsequent Free Chlorine tests. It is
advisable to use separate vials for Free and Total Chlorine.
2.4.3 Interferences
Acidity:
Greater than 250ppm CaCO3 may cause interference. To remove this
interference, neutralise a separate sample to pH6-7 using 1N Sodium
Hydroxide. Record the volume used and add the same volume of 1N
Sodium Hydroxide to the sample before carrying out the above test
procedure. Use a multiplication factor to correct for the dilution of the
sample.
11
Measurement: Chlorine, Free & Total
C401/301/201Colorimeter
Alkalinity:
Greater than 250ppm CaCO3 may cause interference. To remove this
interference, neutralise a separate sample to pH6-7 using 1N Sulphuric
Acid. Note the volumes used and add the same volume of 1N Sulphuric
Acid to the sample before carrying out the above test procedure. Use a
multiplication factor to correct for the dilution of the sample.
Hardness:
No effect at less than 2000ppm CaCO3.
Monochloramine:
Monochloramine will cause a gradual increase in the Free Chlorine result
over time. Take the test result within 1 minute of adding the reagent
sachet to avoid these errors.
Oxidants, including Bromine, Chlorine Dioxide, Iodine and Ozone:
These will interfere with the test method at all levels. It is recommended
that an alternative test method is used if more than any two of these
species are present.
Oxidised Manganese or Oxidised Chromium:
All levels will cause interference. To remove this interference:
1.
Test a 10ml sample as described in the above procedure.
2.
Adjust the pH of a separate 10ml sample to pH6-7 using 1N Sodium
Hydroxide or 1N Sulphuric Acid.
3.
Add 1 drop of 20% Potassium Iodide Solution; swirl to mix and then
wait 60 seconds.
4.
Add 3 drop of 5g/l Sodium Arsenite Solution and swirl to mix.
5.
Use this as the sample in the above test procedure and make a note
of the result. Use a multiplication factor to correct for the dilution of
the sample.
6.
Subtract the result obtained in step 5 from the result obtained in step
1 to give the true result.
7.
Correcting for dilution: To correct for any reagent added to the
sample to neutralise it, a dilution correction factor must be used:
Final Volume ÷ Initial Sample Volume = Correction Factor
The final volume can be calculated by adding together the initial
12
Measurement: Chlorine, Free & Total
C401/301/201Colorimeter
sample volume and the volume of neutralising reagent used:
Final Volume = Initial Sample Volume + Volume of Neutralising
Reagent.
The result from a test can then be multiplied by the Correction Factor
to give the true result.
If reagents are added from the supplied dropper bottles, then 25
drops is equal to 1ml.
Example:
50ml sample is neutralised using 50 drops of 1N Sulphuric Acid, and
each drop is 0.04 ml.
Initial Sample Volume = 50ml
Volume of Neutralising Reagent added = 50drops X 0.04 ml= 2ml
Final Volume = 50ml + 2ml = 52ml
Correction Factor = 52/50 = 1.04
A test result of 1.00ppm would then become 1.00ppm X 1.04 =
1.04ppm
2.4.4 Accuracy Check / User Calibration
Producing chlorine standards is a difficult procedure that should only be
attempted by trained laboratory staff. Details of preparation techniques are
not provided in this document.
The prepared chlorine standard may be used to check the accuracy of the
meter or to re-calibrate the meter. In almost all cases it is recommended
to use the default factory calibration.
To check the accuracy of the meter: Prepare a standard solution of
known concentration within the range of the instrument. It is advisable to
prepare a standard near to the concentration value usually tested with the
meter. Use this standard in place of the sample water in the above test
method. Repeat the measurement 5-7 times with different sachets and
average the results. The result obtained should be approximately the
value of the standard used (please refer to instrument’s specifications for
data on meter precision and accuracy).
To re-calibrate the meter: All instruments are factory calibrated and user
calibration is not recommended. However, if a Chlorine standard can be
prepared, measured accurately and qualified by a different method
(titration, for example) or another instrument of higher precision and
accuracy, then a Chlorine standard in the 4.1-5.0 ppm Cl2 range can be
used. Please refer to Section 3.2 Chlorine, Free & Total, Chlorine Dioxide,
13
Measurement: Chlorine, Free & Total
C401/301/201Colorimeter
Bromine and Ozone, for details.
2.4.5 Chemistry
Chlorine exists in water as Un-Combined (Free) Chlorine and Combined
Chlorine. The concentration of Free Chlorine can be determined directly
and the concentration of Combined Chlorine may be calculated by
subtracting the concentration of Free Chlorine from that of Total Chlorine.
In the Free Chlorine test method Un-Combined Chlorine reacts directly
with DPD (N,N-diethyl-p-phenylenediamine) in a conditioned sample to
give a pink color. In the Total Chlorine test method Combined Chlorine
reacts with potassium iodide to form tri-iodide ions. The tri-iodide ions and
the Free Chlorine present react with DPD in a conditioned sample to give
a pink color.
The depth of the pink color produced is proportional to the concentration of
Chlorine. The amount of 525nm light absorbed by the pink color is
accurately measured by the meter and then converted into the Chlorine
concentration.
14
Measurement: Cyanuric Acid
C401/102 Colorimeter
2.5
•
Cyanuric Acid (5-90 ppm)
For water and treated water
1.
Switch the meter on by pressing the ON/OFF key.
2.
For single-parameter colorimeter, the display will momentarily show
[CYNA] before switching directly to [STbY] as that of step 3. For
multi-parameter colorimeter, the display will indicate the last test
performed. Press the MODE key repeatedly until [CYNA] is
displayed.
3.
Press the READ/ENTER key to confirm the test parameter. The
meter will read [STbY] indicating it is in stand-by mode, waiting for
either blanking or measurement.
READ
ENTER
Cyanuric Acid test selection (Multi-Parameter Colorimeter)
4.
Select a clean and dry vial, un-screw the cap and fill with sample
water to the line on the vial. Replace the cap, ensuring it is screwed
on finger tight to the vial.
5.
Ensure the outside of the vial is clean, dry and absent of any marks
or finger-prints. Gently push the vial fully into the meter, whilst
aligning the ▼ mark on the vial with the ▲ mark on the meter.
6.
Press the ZERO key to blank the meter to that vial; the meter will
read [ZERo] whilst this is taking place.
Note: The meter will store the last zero value it took between tests, even if it
turns off or if the batteries are removed.
ZERO
Blanking
Sample
ppm
7.
Remove the vial from the meter and un-screw the cap. Select a
Cyanuric Acid Reagent Sachet. Open the sachet and tip the contents
into the vial.
8.
Replace the cap, ensuring it is screwed on finger tight to the vial.
Shake the vial for 1 minute.
Note: a small amount of the powder may remain un-dissolved in the vial, but
this will not affect the reading.
15
Measurement: Cyanuric Acid
C401/102 Colorimeter
Add content of one
Cyanuric Acid Reagent Sachet
9.
Shake for
1 minute
Gently push the vial back fully into the sample well of the instrument,
whilst again aligning the ▼ mark on the vial with the ▲ mark on the
meter.
10. Wait for two minutes and then press the READ/ENTER key within
five minutes from the time the Cyanuric Acid reagent was added to
the vial.
11. The meter will flash [CYNA] whilst the measurement is taken. It will
then display the Cyanuric Acid concentration in parts per million
(ppm).
Cyanuric
Acid
Sample
READ
ENTER
ppm
16
Measurement: Cyanuric Acid
C401/102 Colorimeter
Cyanuric Acid Measuring Hints & Tips
2.5.1 Sample Collection
Samples may be collected in either plastic or glass bottles. It is advisable
to wash the container with sample water before collecting the sample.
Do not store the sample for more than 24 hours before conducting the
analysis.
2.5.2 Sample Measurement
Due to the nature of the test method, concentrations less than 5 ppm
Cyanuric Acid are not detectable.
Clean the vial immediately after taking and recording a reading. Do not
leave the sample with added reagent into the vial for more than few
minutes after measurement. The test will cause the build up of a cloudy
layer on the inside wall of the vial. It is important to thoroughly clean the
vial after use to remove this layer because subsequent test results may be
affected.
2.5.3 Interferences
Sample Turbidity:
Turbid samples should be filtered prior to analysis.
2.5.4 Accuracy Check / User Calibration
A stock solution of 1000ppm Cyanuric Acid may be produced by dissolving
exactly 1g of Cyanuric Acid in 1 litre of de-ionised water (check the purity
of the Cyanuric acid being used; if less than 100%, adjust the amount
used accordingly).
The stock solution may then be diluted to give a Cyanuric Acid standard.
To do this take a portion of the stock solution and make up to 1 litre using
de-ionised water (for example, 50ml of stock solution will produce a
50ppm standard).
To check the accuracy of the meter: Prepare a standard in the range
20-80 ppm (it is advisable to check a standard at near the concentration
usually tested for using the meter). Use this standard in place of the
sample water in the above test method. The result obtained should be
approximately the value of the standard used (please refer to instrument’s
specifications for data on meter precision and accuracy).
17
Measurement: Cyanuric Acid
C401/102 Colorimeter
To re-calibrate the meter: All instruments are factory calibrated and user
calibration is not recommended. However, if a Cyanuric Acid standard can
be accurately prepared, or measured by a different method or instrument
of higher precision and accuracy, then a Cyanuric Acid standard in the 6675 ppm range can be used. Please refer to section 3.3 Cyanuric Acid for
details.
2.5.5 Chemistry
Cyanuric Acid is commonly used to stabilize the chlorine present in
swimming pool water. With correct pool maintenance, Cyanuric Acid
build-up is uncommon; however, if correct maintenance is not carried out,
the levels may build up until potentially harmful.
In the test method, the Cyanuric acid reacts with the sachet reagent, in a
conditioned sample, to produce a suspended turbidity.
The amount of turbidity produced is proportional to the concentration of
Cyanuric Acid. The amount of 525nm light absorbed/scattered by the
turbidity is accurately measured by the meter and then converted into the
Cyanuric Acid concentration.
18
Measurement: pH
C401/301/101 Colorimeter
2.6
•
pH (5.9-8.2 pH units)
For water and wastewater (Phenol Red Method)
1.
Switch the meter on by pressing the ON/OFF key.
2.
For single-parameter colorimeter, the display will momentarily show
[PH] before switching directly to [STbY] as that of step 3. For multiparameter colorimeter, the display will indicate the last test
performed. Press the MODE key repeatedly until [PH] is displayed.
3.
Press the READ/ENTER key to confirm the test parameter. The
meter will read [STbY] indicating it is in stand-by mode, waiting for
either blanking or measurement.
READ
ENTER
pH test selection (Multi-Parameter Colorimeter)
4.
Select a clean and dry vial, un-screw the cap and fill with sample
water to the line on the vial. Replace the cap, ensuring it is screwed
on finger tight to the vial.
5.
Ensure the outside of the vial is clean, dry and absent of any marks
or finger-prints. Gently place the vial fully into the sample well of the
instrument, whilst aligning the ▼ mark on the vial with the ▲ mark on
the meter.
6.
Press the ZERO key to blank the meter to that vial; the meter will
read [ZERo] whilst this is taking place.
Note: The meter will store the last zero value it took between tests, even if it
turns off or if the batteries are removed.
ZERO
Blanking
Sample
pH
7.
Remove the vial from the meter and un-screw the cap. Select a
bottle of pH Indicator (Phenol Red). Unscrew the cap and holding
the bottle vertically; gently squeeze 20 drops of the Phenol Red into
the contents of the vial. Replace the cap onto the Phenol Red bottle.
Take extra care not to over-tighten the cap.
8.
Replace the cap onto the vial, ensuring it is screwed on finger tight.
Invert the vial several times to mix.
19
Measurement: pH
C401/301/101 Colorimeter
pH
Indicator
(Phenol
Red)
Add 20 drops of pH Indicator
(Phenol Red)
9.
Invert several
times to mix.
Gently push the vial back fully into the sample well of the instrument,
whilst again aligning the ▼ mark on the vial with the ▲ mark on the
meter.
10. Wait for 1 minute and then press the READ/ENTER key within 3
minutes from when the time the Phenol Red was added to the vial.
11. The meter will flash [PH] whilst the measurement is taken. It will then
display the pH of the solution in pH units.
READ
ENTER
pH
Sample
pH
20
Measurement: pH
C401/301/101 Colorimeter
pH Measuring Hints & Tips
2.6.1 Sample Collection
Samples may be collected in either plastic or glass bottles. It is advisable
to wash the container with sample water before the sample is collected.
For accurate results, analysis should be conducted as soon as possible
after sample collection.
2.6.2 Sample Measurement
The amount of sample used and the amount of reagent added is critical to
obtaining correct test results. Ensure that the reagent is added in a
consistent manner, with the dropper bottle being held vertically and
squeezed slowly. To increase the test accuracy, measure the 10ml
sample and reagent using calibrated pipettes. Note: 20 drops of reagent =
0.8ml.
It is important to re-calibrate the meter to each new batch of reagent used,
or if the reagent has not been used for more than a month. It is also
important to occasionally check the results obtained with a colorless pH7.0
buffer solution. If the result is outside the range pH6.9-7.1 re-calibrate the
meter (please refer to section 3.4 pH).
Due to the nature of the test method, a sample pH of less than 5.9 or
greater than 8.2 may result in false readings. Do not use this test method
to analyze samples with a pH outside of the specified range.
2.6.3 Interferences
Chlorine:
Chlorine concentrations of greater than 6ppm may interfere. To remove
this interference, add a crystal of Sodium Thiosulphate to the sample and
mix, before adding the reagent.
2.6.4 Accuracy Check / User Calibration
A colorless pH7.0 buffer (supplied) can be used to check the test accuracy
and strength of reagent.
To check the accuracy of the meter: Use a colorless pH7.0 buffer in
place of the sample water in the above test method. The result obtained
should be in the range pH6.9-7.1 (please refer to instrument’s
specifications for data on meter precision and accuracy).
To re-calibrate the meter: Please refer to section 3.4 pH for details.
21
Measurement: pH
C401/301/101 Colorimeter
2.6.5 Chemistry
The monitoring and control of the pH of water is important in many
different applications. This test method provides a quick and accurate
method for measuring pH in the range pH5.9 - 8.2.
A precise amount of phenol red indicator is added to a sample of water.
The phenol red changes color from yellow at pH5.9 through to dark red at
pH8.2.
The amount of red color is related to its pH. The amount of 525nm light
absorbed by the red color is accurately measured by the meter and then
converted into the pH of the sample.
22
Measurement: Chlorine Dioxide
C103 Colorimeter
2.7
•
Chorine Dioxide (0 – 11.4 ppm ClO2)
DPD method1 for Chlorine Dioxide - applicable to water, treated
water, and wastewater.
Note: 1Adapted from “Standard methods for the Examination of Water and
Wastewater.”
1.
Switch the meter on by pressing the ON/OFF key. The display will
show [CLO2] momentarily before displaying [STbY] indicating it is in
stand-by mode, waiting for either blanking or measurement.
2.
Select a clean and dry vial, un-screw the cap and fill with sample
water to the line on the vial. Replace the cap, ensuring it is screwed
on finger tight to the vial.
3.
Ensure the outside of the vial is clean, dry and absent of any marks
or finger-prints. Gently push the vial fully into the sample well of the
instrument, whilst aligning the ▼ mark on the vial with the ▲ mark on
the meter.
4.
Press the ZERO key to initiate blanking of the meter. The display will
show [ZERo] while blanking is taking place.
Note: The meter will store and use the last blanking (or zero) value, even if it
is turned off, or if the batteries are removed.
ZERO
Blanking
Sample
ppm
5.
Remove the vial from the meter and add into it the content of one
Chlorine Dioxide (Glycine) Reagent Sachet.
6.
Replace the cap, ensuring it is screwed on finger tight to the vial.
Swirl the vial repeatedly for approximately 20 seconds, until the
powder has dissolved.
Note: Do not shake or invert the vial as this may result in the loss of Chlorine
Dioxide.
23
Measurement: Chlorine Dioxide
C103 Colorimeter
Swirl vial approximately
20 seconds until powder
dissolves
Add content of one
Chlorine Dioxide (Glycine)
Reagent Sachet
7.
Unscrew the cap from the vial and add into it the content of a
Chlorine, Free (DPD) Reagent Sachet.
8.
Replace the cap, ensuring it is screwed on finger tight to the vial.
Swirl the vial repeatedly for approximately 20 seconds, until the
powder has dissolved.
Note: A small amount of the powder may remain un-dissolved in the vial, but
this will not affect the measurement. Do not shake or invert the vial as this
may result in the loss of Chlorine Dioxide.
Add content of one
Chlorine, Free (DPD)
Reagent Sachet
9.
Swirl vial approximately
20 seconds until powder
dissolves
Gently push the vial back fully into the sample well of the meter,
whilst again aligning the ▼ mark on the vial with the ▲ mark on the
meter.
10. Press the READ/ENTER key within one minute from the time the
Chlorine, Free (DPD) Reagent Sachet was added to the vial.
11. The meter will flash [CLO2] whilst the measurement is taken. It will
then display the Chlorine Dioxide concentration in parts per million
(ppm).
Chlorine
Dioxide
Sample
READ
ENTER
ppm
24
Measurement: Chlorine Dioxide
C103 Colorimeter
Chlorine Dioxide Measuring Hints & Tips
2.7.1 Sample Collection
Chlorine Dioxide determination must take place as soon as possible after
the sample is taken or else low results may be obtained.
Plastic containers should not be used to collect the sample because these
may have a high chlorine dioxide demand which will lead to low reading
results. It is advisable to wash the container with sample water before the
sample is collected.
Do not agitate the sample as this will also lead to low results.
2.7.2 Sample Measurement
If the pink colour forms and then rapidly fades, this is an indication that the
chlorine dioxide concentration may be very high. If this is the case, dilute
the sample with de-ionised water and retest. Multiply the result by the
dilution factor used.
Example: if the sample was diluted 2:1 with de-ionised water (i.e. 1 part
sample water to 1 part de-ionised water), the result is multiplied by 2 to
give the true concentration of the original sample.
Note: Results obtained by this method will not be as accurate as stated in
this manual because some chlorine dioxide will be lost in the dilution
process.
After use, the vial should be cleaned thoroughly to avoid contaminating the
next sample. Do not use household cleaners as these may have a
chlorine dioxide demand which will lead to low results on subsequent
tests.
2.7.3 Interferences
Acidity:
Greater than 250ppm CaCO3 may cause interference. To remove this
interference, neutralise a separate sample to pH6-7 using 1N Sodium
Hydroxide. Record the volume used and add the same volume of 1N
Sodium Hydroxide to the sample before carrying out the above test
procedure. Use a multiplication factor to correct for the dilution of the
sample.
Alkalinity:
Greater than 250ppm CaCO3 may cause interference. To remove this
interference, neutralise a separate sample to pH6-7 using 1N Sulphuric
Acid. Note the volume used and add the same volume of 1N Sulphuric
25
Measurement: Chlorine Dioxide
C103 Colorimeter
Acid to the sample before carrying out the above test procedure. Use a
multiplication factor to correct for the dilution of the sample.
Chlorine:
Chlorine levels greater than 6ppm may interfere. Use two sachets of
Chlorine Dioxide (Glycine) Reagent in step 5) to remove the interference.
Hardness:
No effect at less than 2000ppm CaCO3.
Metals and Chlorine in Combination:
If chlorine is present, some metals may interfere with the test. Use two
sachets of Chlorine Dioxide (Glycine) Reagent in step 5) to remove the
interference.
Monochloramine:
Monochloramine will cause a gradual increase in the Chlorine Dioxide
result over time. Take the test result within 1 minute of adding the reagent
sachet to avoid these errors.
Oxidants, including Bromine and Iodine:
These will interfere with the test method at all levels. It is recommended
that an alternative test method is used if these species are present.
Ozone:
May cause interference at levels above 1.5ppm.
Oxidised Manganese or Oxidised Chromium:
All levels will cause interference. To remove this interference:
1.
Test a 10ml sample as described in the above procedure.
2.
Adjust the pH of a separate 10ml sample to pH6-7 using 1N Sodium
Hydroxide or 1N Sulphuric Acid.
3.
Add 1 drop of 20% Potassium Iodide Solution; swirl to mix and then
wait 60 seconds.
4.
Add 3 drop of 5g/l Sodium Arsenite Solution and swirl to mix.
5.
Use this as the sample in the above test procedure and make a note
of the result. Use a multiplication factor to correct for the dilution of
the sample.
26
Measurement: Chlorine Dioxide
C103 Colorimeter
6.
Subtract the result obtained in step 5 from the result obtained in step
1 to give the true result.
7.
Correcting for dilution: To correct for any reagent added to the
sample to neutralise it, a dilution correction factor must be used:
Final Volume ÷ Initial Sample Volume = Correction Factor
The final volume can be calculated by adding together the initial
sample volume and the volume of neutralising reagent used:
Final Volume = Initial Sample Volume + Volume of Neutralising
Reagent.
The result from a test can then be multiplied by the Correction Factor
to give the true result.
If reagents are added from the supplied dropper bottles, then 25
drops is equal to 1ml.
Example:
50ml sample is neutralised using 50 drops of 1N Sulphuric Acid, and
each drop is 0.04 ml.
Initial Sample Volume = 50ml
Volume of Neutralising Reagent added = 50drops X 0.04 ml= 2ml
Final Volume = 50ml + 2ml = 52ml
Correction Factor = 52/50 = 1.04
A test result of 1.00ppm would then become 1.00ppm X 1.04 =
1.04ppm
2.7.4 Accuracy Check / User Calibration
Producing chlorine standards is a difficult procedure that should only be
attempted by trained laboratory staff. Details of preparation techniques are
not provided in this document.
The prepared chlorine standard may be used to check the accuracy of the
meter or to re-calibrate the meter. In almost all cases it is recommended
to use the default factory calibration.
To check the accuracy of the meter: Prepare a standard solution of
known concentration within the range of the instrument. It is advisable to
prepare a standard near to the concentration value usually tested with the
meter. Use this standard in place of the sample water in the above test
method. Repeat the measurement 5-7 times with different sachets and
27
Measurement: Chlorine Dioxide
C103 Colorimeter
average the results. The result obtained should be approximately the
value of the standard used (please refer to instrument’s specifications for
data on meter precision and accuracy).
To re-calibrate the meter: All instruments are factory calibrated and user
calibration is not recommended. However, if a Chlorine standard can be
prepared, measured accurately and qualified by a different method
(titration, for example) or another instrument of higher precision and
accuracy, then a Chlorine standard in the 4.1-5.0 ppm Cl2 range can be
used. Please refer to Section 3.2 Chlorine, Free & Total, Chlorine Dioxide,
Bromine and Ozone, for details.
28
Measurement: Bromine
C104 Colorimeter
2.8
•
Bromine (0 – 13.5ppm Br2)
DPD method1 for Bromine - applicable to water, treated water,
wastewater and seawater.
Note: 1Adapted from “Standard methods for the Examination of Water and
Wastewater.”
1.
Switch the meter on by pressing the ON/OFF key. The display will
show [bR] momentarily before displaying [STbY] indicating it is in
stand-by mode, waiting for either blanking or measurement.
2.
Select a clean and dry vial, un-screw the cap and fill with sample
water to the line on the vial. Replace the cap, ensuring it is screwed
on finger tight to the vial.
3.
Ensure the outside of the vial is clean, dry and absent of any marks
or finger-prints. Gently push the vial fully into the sample well of the
instrument, whilst aligning the ▼ mark on the vial with the ▲ mark on
the meter.
4.
Press the ZERO key to initiate blanking of the meter. The display will
show [ZERo] while blanking is taking place.
Note: The meter will store and use the last blanking (or zero) value, even if it
is turned off, or if the batteries are removed.
ZERO
Blanking
Sample
ppm
5.
Remove the vial from the meter and add into it the content of one
Chlorine, Total (DPD) Reagent Sachet.
6.
Replace the cap, ensuring it is screwed on finger tight to the vial.
Invert the vial repeatedly for approximately 20 seconds, until the
powder has dissolved.
Note: A small amount of the powder may remain un-dissolved in the vial, but
this will not affect the measurement.
29
Measurement: Bromine
C104 Colorimeter
Add content of one
Chlorine,Total (DPD)
Reagent Sachet
Invert vial approximately
20 seconds until powder
dissolves
7.
Gently push the vial back fully into the sample well of the meter,
whilst again aligning the ▼ mark on the vial with the ▲ mark on the
meter.
8.
Wait for two minutes and then press the READ/ENTER key within
four minutes from the time the DPD Total reagent was added to the
vial.
9.
The meter will flash [bR] whilst the measurement is taken. It will then
display the Bromine concentration in parts per million (ppm).
READ
ENTER
Bromine
Sample
ppm
30
Measurement: Bromine
C104 Colorimeter
Bromine Measuring Hints & Tips
2.8.1 Sample Collection
Bromine determination must take place as soon as possible after the
sample is taken or else low results may be obtained.
Plastic containers should not be used to collect the sample because these
may have a high chlorine demand which will lead to low reading results. It
is advisable to wash the container with sample water before the sample is
collected.
Avoid agitating the sample excessively as this may also lead to low
results.
2.8.2 Sample Measurement
If the pink color forms and then rapidly fades, this is an indication that the
bromine concentration may be very high. If this is the case, dilute the
sample with de-ionized water and retest. Multiply the result by the dilution
factor used.
Example: if the sample was diluted 2:1 with de-ionized water (i.e. 1 part
sample water to 1 part de-ionized water), the result is multiplied by 2 to
give the true concentration of the original sample.
Note: Results obtained by this method will not be as accurate as stated in
this manual because some chlorine will be lost in the dilution process.
After use, the vial should be cleaned thoroughly to avoid contaminating the
next sample. Do not use household cleaners as these may have a
chlorine demand which will lead to low results on subsequent tests.
After testing Bromine give extra attention to cleaning the vial as any
residual reagent will affect any subsequent tests.
2.8.3 Interferences
Acidity:
Greater than 250ppm CaCO3 may cause interference. To remove this
interference, neutralise a separate sample to pH6-7 using 1N Sodium
Hydroxide. Record the volume used and add the same volume of 1N
Sodium Hydroxide to the sample before carrying out the above test
procedure. Use a multiplication factor to correct for the dilution of the
sample.
Alkalinity:
Greater than 250ppm CaCO3 may cause interference. To remove this
31
Measurement: Bromine
C104 Colorimeter
interference, neutralise a separate sample to pH6-7 using 1N Sulphuric
Acid. Note the volumes used and add the same volume of 1N Sulphuric
Acid to the
sample before carrying out the above test procedure. Use a multiplication
factor to correct for the dilution of the sample.
Hardness:
No effect at less than 2000ppm CaCO3.
Monochloramine:
Monochloramine will cause a gradual increase in the Free Chlorine result
over time. Take the test result within 1 minute of adding the reagent
sachet to avoid these errors.
Oxidants, including Chlorine, Chlorine Dioxide, Iodine and Ozone:
These will interfere with the test method at all levels. It is recommended
that an alternative test method is used if more than any two of these
species are present.
Oxidised Manganese or Oxidised Chromium:
All levels will cause interference. To remove this interference:
1.
Test a 10ml sample as described in the above procedure.
2.
Adjust the pH of a separate 10ml sample to pH6-7 using 1N Sodium
Hydroxide or 1N Sulphuric Acid.
3.
Add 1 drop of 20% Potassium Iodide Solution; swirl to mix and then
wait 60 seconds.
4.
Add 3 drop of 5g/l Sodium Arsenite Solution and swirl to mix.
5.
Use this as the sample in the above test procedure and make a note
of the result. Use a multiplication factor to correct for the dilution of
the sample.
6.
Subtract the result obtained in step 5 from the result obtained in step
1 to give the true result.
7.
Correcting for dilution: To correct for any reagent added to the
sample to neutralise it, a dilution correction factor must be used:
Final Volume ÷ Initial Sample Volume = Correction Factor
The final volume can be calculated by adding together the initial
sample volume and the volume of neutralising reagent used:
Final Volume = Initial Sample Volume + Volume of Neutralising
32
Measurement: Bromine
C104 Colorimeter
Reagent.
The result from a test can then be multiplied by the Correction Factor
to give the true result.
If reagents are added from the supplied dropper bottles, then 25
drops is equal to 1ml.
Example:
50ml sample is neutralised using 50 drops of 1N Sulphuric Acid, and
each drop is 0.04 ml.
Initial Sample Volume = 50ml
Volume of Neutralising Reagent added = 50drops X 0.04 ml= 2ml
Final Volume = 50ml + 2ml = 52ml
Correction Factor = 52/50 = 1.04
A test result of 1.00ppm would then become 1.00ppm X 1.04 =
1.04ppm
2.8.4 Accuracy Check / User Calibration
Producing chlorine standards is a difficult procedure that should only be
attempted by trained laboratory staff. Details of preparation techniques are
not provided in this document.
The prepared chlorine standard may be used to check the accuracy of the
meter or to re-calibrate the meter. In almost all cases it is recommended
to use the default factory calibration.
To check the accuracy of the meter: Prepare a standard solution of
known concentration within the range of the instrument. It is advisable to
prepare a standard near to the concentration value usually tested by the
meter. Use this standard in place of the sample water in the above test
method. Repeat the measurement 5-7 times with different sachets and
average the results. The result obtained should be approximately the
value of the standard used (please refer to instrument’s specifications for
data on meter precision and accuracy).
To re-calibrate the meter: All instruments are factory calibrated and user
calibration is not recommended. However, if a Chlorine standard can be
prepared, measured accurately and qualified by a different method
(titration, for example) or another instrument of higher precision and
accuracy, then a Chlorine standard in the 4.1-5.0 ppm Cl2 range can be
used. Please refer to Section 3.2 Chlorine, Free & Total, Chlorine Dioxide,
Bromine and Ozone, for details.
33
Measurement: Ozone
C105 Colorimeter
2.9
•
Ozone (0 – 4.1 ppm O3)
DPD method1 for Ozone - applicable to water, treated water,
wastewater and seawater.
Note: 1Adapted from “Standard methods for the Examination of Water and
Wastewater.”
1.
Switch the meter on by pressing the ON/OFF key. The display will
show [OZ] momentarily before displaying [STbY] indicating it is in
stand-by mode, waiting for either blanking or measurement.
2.
Select a clean and dry vial, un-screw the cap and fill with sample
water to the line on the vial. Replace the cap, ensuring it is screwed
on finger tight to the vial.
3.
Ensure the outside of the vial is clean, dry and absent of any marks
or finger-prints. Gently push the vial fully into the sample well of the
instrument, whilst aligning the ▼ mark on the vial with the ▲ mark on
the meter.
4.
Press the ZERO key to initiate blanking of the meter. The display will
show [ZERo] while blanking is taking place.
Note: The meter will store and use the last blanking (or zero) value, even if it
is turned off, or if the batteries are removed.
ZERO
Blanking
Sample
ppm
5.
Remove the vial from the meter and add into it the content of one
Chlorine, Total (DPD) Reagent Sachet.
6.
Replace the cap, ensuring it is screwed on finger tight to the vial.
Invert the vial repeatedly for approximately 20 seconds, until the
powder has dissolved.
Note: A small amount of the powder may remain un-dissolved in the vial, but
this will not affect the measurement.
34
Measurement: Ozone
C105 Colorimeter
Add content of one
Chlorine,Total (DPD)
Reagent Sachet
Invert vial approximately
20 seconds until powder
dissolves
7.
Gently push the vial back fully into the sample well of the meter,
whilst again aligning the ▼ mark on the vial with the ▲ mark on the
meter.
8.
Wait for two minutes and then press the READ/ENTER key within
four minutes from the time the DPD Total reagent was added to the
vial.
9.
The meter will flash [OZ] whilst the measurement is taken. It will then
display the Ozone concentration in parts per million (ppm).
READ
ENTER
Ozone
Sample
ppm
35
Measurement: Ozone
C105 Colorimeter
Ozone Measuring Hints & Tips
2.9.1 Sample Collection
Ozone determination must take place as soon as possible after the
sample is taken or else low results may be obtained.
Plastic containers should not be used to collect the sample because these
may have a high chlorine demand which will lead to low reading results. It
is advisable to wash the container with sample water before the sample is
collected.
Avoid agitating the sample excessively as this may also lead to low
results.
2.9.2 Sample Measurement
If the pink color forms and then rapidly fades, this is an indication that the
ozone concentration may be very high. If this is the case, dilute the
sample with de-ionized water and retest. Multiply the result by the dilution
factor used.
Example: if the sample was diluted 2:1 with de-ionized water (i.e. 1 part
sample water to 1 part de-ionized water), the result is multiplied by 2 to
give the true concentration of the original sample.
Note: Results obtained by this method will not be as accurate as stated in
this manual because some chlorine will be lost in the dilution process.
After use, the vial should be cleaned thoroughly to avoid contaminating the
next sample. Do not use household cleaners as these may have a
chlorine demand which will lead to low results on subsequent tests.
After testing Ozone, give extra attention to cleaning the vial as any
residual reagent will affect any subsequent tests.
2.9.3 Interferences
Acidity:
Greater than 250ppm CaCO3 may cause interference. To remove this
interference, neutralise a separate sample to pH6-7 using 1N Sodium
Hydroxide. Record the volume used and add the same volume of 1N
Sodium Hydroxide to the sample before carrying out the above test
procedure. Use a multiplication factor to correct for the dilution of the
sample.
Alkalinity:
Greater than 250ppm CaCO3 may cause interference. To remove this
36
Measurement: Ozone
C105 Colorimeter
interference, neutralise a separate sample to pH6-7 using 1N Sulphuric
Acid. Note the volumes used and add the same volume of 1N Sulphuric
Acid to the sample before carrying out the above test procedure. Use a
multiplication factor to correct for the dilution of the sample.
Hardness:
No effect at less than 2000ppm CaCO3.
Monochloramine:
Monochloramine will cause a gradual increase in the Free Chlorine result
over time. Take the test result within 1 minute of adding the reagent
sachet to avoid these errors.
Oxidants, including Chlorine, Chlorine Dioxide, Iodine and Bromine:
These will interfere with the test method at all levels. It is recommended
that an alternative test method is used if more than any two of these
species are present.
Oxidised Manganese or Oxidised Chromium:
All levels will cause interference. To remove this interference:
1.
Test a 10ml sample as described in the above procedure.
2.
Adjust the pH of a separate 10ml sample to pH6-7 using 1N Sodium
Hydroxide or 1N Sulphuric Acid.
3.
Add 1 drop of 20% Potassium Iodide Solution; swirl to mix and then
wait 60 seconds.
4.
Add 3 drop of 5g/l Sodium Arsenite Solution and swirl to mix.
5.
Use this as the sample in the above test procedure and make a note
of the result. Use a multiplication factor to correct for the dilution of
the sample.
6.
Subtract the result obtained in step 5 from the result obtained in step
1 to give the true result.
7.
Correcting for dilution: To correct for any reagent added to the
sample to neutralise it, a dilution correction factor must be used:
Final Volume ÷ Initial Sample Volume = Correction Factor
The final volume can be calculated by adding together the initial
sample volume and the volume of neutralising reagent used:
Final Volume = Initial Sample Volume + Volume of Neutralising
Reagent.
37
Measurement: Ozone
C105 Colorimeter
The result from a test can then be multiplied by the Correction Factor
to give the true result.
If reagents are added from the supplied dropper bottles, then 25
drops is equal to 1ml.
Example:
50ml sample is neutralised using 50 drops of 1N Sulphuric Acid, and
each drop is 0.04 ml.
Initial Sample Volume = 50ml
Volume of Neutralising Reagent added = 50drops X 0.04 ml= 2ml
Final Volume = 50ml + 2ml = 52ml
Correction Factor = 52/50 = 1.04
A test result of 1.00ppm would then become 1.00ppm X 1.04 =
1.04ppm
2.9.4 Accuracy Check / User Calibration
Producing chlorine standards is a difficult procedure that should only be
attempted by trained laboratory staff. Details of preparation techniques are
not provided in this document.
The prepared chlorine standard may be used to check the accuracy of the
meter or to re-calibrate the meter. In almost all cases it is recommended
to use the default factory calibration.
To check the accuracy of the meter: Prepare a standard solution of
known concentration within the range of the instrument. It is advisable to
prepare a standard near to the concentration value usually tested by the
meter. Use this standard in place of the sample water in the above test
method. Repeat the measurement 5-7 times with different sachets and
average the results. The result obtained should be approximately the
value of the standard used (please refer to instrument’s specifications for
data on meter precision and accuracy).
To re-calibrate the meter: All instruments are factory calibrated and user
calibration is not recommended. However, if a Chlorine standard can be
prepared, measured accurately and qualified by a different method
(titration, for example) or another instrument of higher precision and
accuracy, then a Chlorine standard in the 4.1-5.0 ppm Cl2 range can be
used. Please refer to Section 3.2 Chlorine, Free & Total, Chlorine Dioxide,
Bromine and Ozone, for details.
38
Calibration
C401/301/201/101/102/103/104/105 Colorimeter
3 CALIBRATION
The C401/301/201/101/102/103/104/105 Colorimeter was calibrated and
tested prior to leaving the factory. Therefore, it is possible for you to use
the instrument directly out of the box. Re-calibration of the instrument is
NOT recommended particularly in the case of chemical tests of very
unstable and/or difficult to prepare calibration solutions. However, the
meter allows you to calibrate in one point for each chemical test fitted in
the instrument. It is recommended to calibrate the pH at 7.0 pH units using
the supplied colorless 7.0 pH buffer.
For each of the chemical tests fitted in the instrument, the Colorimeter
requires only one standard solution for a complete calibration. During
calibration, the instrument performs several system self-diagnostics. As
such, several warning messages will be displayed. If the instrument
detects an irregularity with either the detector or the lamp, a warning
message will be displayed during or upon exiting the calibration mode. If
this occurs, attempt to rectify the situation as indicated in Section 4
Troubleshooting Guide. In any event, the instrument will continue to read
the concentration or pH, but with a decreased accuracy until the error is
rectified.
The meter has an auto exit feature whereby it will exits the calibration
mode if no key is pressed within 10 minutes or if there is an error during
calibration.
3.1
Calibration Procedure
The standard calibration solutions are to be prepared in the ranges
indicated in the specifications. Standard solutions should be measured
accurately and qualified by a different method or another instrument of
higher precision and accuracy.
NOTE: Do not pour liquid directly into the sample well of the instrument.
Always use a vial. The instrument will only accurately measure the sample
when vials sealed with the black caps are used. The black cap serves as
both seal and a light shield.
NOTE: Do not attempt to clean the sample well. The optics may be
damaged.
NOTE: This instrument is designed to measure solutions contained in the
custom made glass vials and therefore the use of other type of sample vials
or sample cells may result in inaccurate measurements.
39
Calibration: Chlorine, Free & Total, Chlorine Dioxide, Bromine, Ozone
C401/301/201/103/104/105 Colorimeter
3.2
Chlorine, Free & Total, Chlorine Dioxide, Bromine and
Ozone
The following procedure describes the calibration procedure for Free
Chlorine and Total Chlorine. The Chlorine Dioxide (C103) Colorimeter
follows the calibration procedure for Free Chlorine. The Bromine (C104)
and Ozone (C105) Colorimeters follow the calibration procedure for Total
Chlorine.
NOTE: Only Chlorine standards must be used for these calibrations. Do not
attempt to calibrate C103, C104, and C105 Colorimeters with Chlorine
Dioxide, Bromine or Ozone standard solutions. Chlorine Dioxide (Glycine)
reagent must not be used during calibration of C103 Colorimeter.
1.
Prepare a Chlorine standard in the 4.1-5.0 ppm Cl2 range. Measure
and record the concentration value using either a non-colorimetric
method or another instrument of similar or higher accuracy.
2.
Ensure the meter is switched off. Press and hold the ZERO key
while switching the meter on by pressing the ON/OFF key. The
meter will momentarily flash the model number and then display the
CAL annunciator at the top left corner of the screen indicating the
instrument is in calibration mode.
3.
Chlorine Free & Total Colorimeter, being multi-parameter, will
display either [CL-F] (for calibrating Chlorine, Free) or [CL-T] (for
calibrating Chlorine, Total). Press the MODE key to select the
desired calibration mode. For Chlorine Dioxide Colorimeter, the
display will show [CL-F] whereas for Bromine or Ozone Colorimeter,
the display shows [CL-T].
ON
OFF
CAL
MODE
ZERO
Press Mode to select
test parameter of
“CL-F” for Free
Chlorine or “CL -T”
for Total Chlorine
Chlorine Free & Total calibration mode selection
4.
Press the READ/ENTER key to confirm the
selected test. The meter will display [bLNK]
indicating it is waiting for a blanking sample.
CAL
NOTE: Blanking is compulsory during calibration; without
blanking the meter will not continue with the calibration procedure.
5.
Select a clean vial, unscrew the cap and fill with deionised water to
the line on the vial. Replace the cap, ensuring it is screwed on
finger tight to the vial.
6.
Ensure the outside of the vial is clean, dry and absent of any marks
or finger-prints. Gently push the vial fully into sample well of the
40
Calibration: Chlorine, Free & Total, Chlorine Dioxide, Bromine, Ozone
C401/301/201/103/104/105 Colorimeter
instrument, whilst aligning the ▼ mark on the vial with the ▲ mark
on the meter.
7.
Press the ZERO key to blank the meter to that vial; the meter will
display [ZERo] whilst this is taking place.
8.
Remove the blanking vial from the meter. The meter displays 4.1
ppm, with the CAL annunciator on the top left corner.
9.
Use the MODE key repeatedly to select the concentration of the
prepared calibration standard in the 4.1 - 5.0 ppm range.
ZERO
CAL
CAL
Blanking
Sample
ppm
Press Mode to
select calibration
point from 4.1 ppm
MODE to 5.0 ppm in an
incremental circular
manner.
10. Select another clean vial, un-screw the cap and fill it with 10 ml of
the prepared Chlorine standard (fill up to the line on the vial).
11. For Free Chlorine or Chlorine Dioxide calibration, select a Chlorine,
Free (DPD) Reagent Sachet, whereas for Total Chlorine, Bromine
or Ozone calibration, select a Chlorine, Total (DPD) Reagent
Sachet. Open the sachet and tip the contents into the
vial containing the calibration standard.
12. Replace the cap, ensuring it is screwed on finger tight to
the vial. Invert the vial repeatedly for approximately 20
seconds, until the powder has dissolved.
NOTE: a small amount of the powder may remain un-dissolved in the vial,
but this will not affect the measurement.
13. Insert the vial fully into the sample well of the meter, whilst again
aligning the ▼ mark on the vial with the ▲ mark on the meter.
14. For Free Chlorine or Chlorine Dioxide calibration, press the
READ/ENTER key within two minutes from the time the sachet was
added to the vial. As for Total Chlorine, Bromine or Ozone
calibration, wait for two minutes before pressing the READ/ENTER
key and this has to be done within five minutes from the time the
sachet was added to the vial.
15. The meter will display [--Rd--] whilst the calibration standard is
being measured and then displays [SAVE] to prompt for calibration
acceptance and saving of calibration data.
Free
Chlorine
Sample
4.5 ppm
READ
ENTER
CAL
ppm
41
Calibration: Chlorine, Free & Total, Chlorine Dioxide, Bromine, Ozone
C401/301/201/103/104/105 Colorimeter
16. Press the READ/ENTER key. The meter now accept the calibration
value and momentarily display [HoLD] and CAL annunciator before
returning to the beginning of the calibration as in step 3.
17. To continue with another calibration, press the MODE key to select
the desired calibration mode (for multi-parameter colorimeter).
18. To exit calibration mode, press ZERO key to return to the
measurement mode.
READ
ENTER
CAL
MODE
Press Mode to select
another calibration test
ZERO
Press ZERO to return
to measurement mode
Chlorine Free & Total calibration sequence
NOTE: If you wish to abort the calibration
process, do NOT press the READ/ENTER key as
in step 16. Press the ZERO key instead. The
meter will display [AbRT] and CAL annunciator to
signify that the calibration has been aborted
without saving the calibration value. The meter
will then return to the beginning of the user
calibration as in step 3.
CAL
NOTE: If an error occurs during calibration, the display will present an error
message. Please refer to Section 4 Troubleshooting Guide for details.
42
Calibration: Cyanuric Acid
C401/102 Colorimeter
3.3
Cyanuric Acid
1.
Prepare a Cyanuric Acid standard solution in the 66 - 75 ppm range
and record the concentration value.
2.
Ensure the meter is switched off. Press and hold the ZERO key while
switching the meter on by pressing the ON/OFF key. The meter will
momentarily flash the model number and then display the CAL
annunciator at the top left corner of the screen indicating the
instrument is in calibration mode.
3.
For the single-parameter colorimeter (C102), the display will show
[CYNA]. For the multi-parameter colorimeter (C401), the display will
indicate the last test performed. Press the MODE key until [CYNA] is
displayed.
ON
OFF
CAL
Press Mode to
select test
MODE parameter of
“CYNA” for
Cyanuric Acid
ZERO
Cyanuric Acid calibration mode selection (Multi-Parameter Colorimeter)
4.
Press the READ/ENTER key to confirm the selected test. The meter
will display [bLNK] indicating it is waiting for a
blanking sample.
CAL
Note: blanking is compulsory during calibration; without
blanking the meter will not continue with the calibration
procedure.
5.
Select a clean vial, un-screw the cap and fill with de-ionised water to
the line on the vial. Replace the cap, ensuring it is screwed on finger
tight to the vial.
6.
Ensure the outside of the vial is clean, dry and absent of any marks
or finger-prints. Gently place the vial fully into sample well of the
instrument, whilst aligning the ▼ mark on the vial with the ▲ mark on
the meter.
7.
Press the ZERO key to blank the meter to that vial; the meter will
display [ZERo] whilst this is taking place.
8.
Remove the blanking vial from the meter.
9.
The meter displays 66 ppm, with CAL annunciator on top left corner.
10. Use the MODE key repeatedly to select the concentration of the
prepared calibration standard in the 66 - 75 ppm range.
ZERO
CAL
CAL
Blanking
Sample
ppm
43
Press Mode to
select calibration
point from 66
MODE ppm to 75 ppm in
an incremental
circular manner.
Calibration: Cyanuric Acid
C401/102 Colorimeter
11. Select another clean vial, un-screw the cap and fill it with 10 ml of the
prepared Cyanuric Acid standard solution (fill up to the line on the
vial).
12. Select a Cyanuric Acid Reagent Sachet. Open the sachet and tip the
contents into the vial containing the calibration standard.
13. Replace the cap, ensuring it is screwed on finger tight
to the vial. Shake the vial for approximately one
minute, until the powder has dissolved.
Shake for
1 minute
Note: a small amount of the powder may remain un-dissolved in the vial, but
this will not affect the measurement.
14. Insert the vial fully into the sample well of the meter, whilst again
aligning the ▼ mark on the vial with the ▲ mark on the meter.
15. Wait for two minutes, then press the READ/ENTER key within five
minutes from the time the Cyanuric Acid reagent was added to the
vial.
16. The meter will display [--Rd--] whilst the calibration standard is being
measured and then displays [SAVE] to prompt for calibration
acceptance and saving of calibration data.
Cyanuric
Acid
Sample
70 ppm
READ
ENTER
CAL
ppm
17. Press the READ/ENTER key. The meter will now accepts the
calibration value and momentarily display [HoLD] and CAL
annunciator before returning to the beginning of the calibration as in
step 3.
18. To continue with another calibration, press the MODE key to select
the desired calibration mode (for multi-parameter colorimeter).
19. To exit the calibration mode, press the ZERO key to return to the
measurement mode.
READ
ENTER
CAL
CAL
44
MODE
Press Mode to
select another
calibration test
ZERO
Press ZERO to
return to
measurement
mode
Calibration: Cyanuric Acid
C401/102 Colorimeter
NOTE: If you wish to abort this calibration process, do NOT press the
READ/ENTER key as in step 17. Press the ZERO key
CAL
instead. The meter will display [AbRT] and CAL
annunciator to signify that the calibration has been
aborted without saving the calibration value. The meter
will then return to the beginning of the user calibration
as in step 3.
NOTE: If an error occurs during calibration, the display will present an error
message. Please refer to Section 4 Troubleshooting Guide for details.
45
Calibration: pH
C401/301/101 Colorimeter
3.4
pH
1.
Ensure at least 10 ml of clear pH7.0 buffer is available.
2.
Ensure the meter is switched off. Press and hold the ZERO key while
switching the meter on by pressing the ON/OFF key. The meter will
momentarily flash the model number and then display the CAL
annunciator at the top left corner of the screen indicating the
instrument is in calibration mode.
3.
For the single-parameter colorimeter (C101), the display will show
[PH]. For the multi-parameter colorimeters (C401& C301), the display
will indicate the last test performed. Press the MODE key until [PH] is
displayed.
ON
OFF
CAL
MODE
Press Mode
to select test
parameter of
“PH”
ZERO
pH calibration mode selection (Multi-Parameter Colorimeter)
4.
Press the READ/ENTER key to confirm the selected test. The meter
will display [bLNK] indicating it is waiting for a
CAL
blanking sample.
Note: blanking is compulsory during calibration; without
blanking the meter will not continue with the calibration
procedure.
5.
Select a clean vial, un-screw the cap and fill with de-ionised water to
the line on the vial. Replace the cap, ensuring it is screwed on finger
tight to the vial.
6.
Ensure the outside of the vial is clean, dry and absent of any marks
or finger-prints. Gently push the vial fully into sample well of the
instrument, whilst aligning the ▼ mark on the vial with the ▲ mark on
the meter.
7.
Press the ZERO key to blank the meter to that vial; the meter will
read [ZERo] whilst this is taking place.
8.
Remove the blanking vial from the meter.
9.
The meter displays 7.0 pH, with CAL annunciator on top left corner.
ZERO
CAL
Blanking
Sample
pH
46
Calibration: pH
C401/301/101 Colorimeter
10. Select another clean vial, un-screw the cap and fill it
with 10 ml of the pH7.0 colorless buffer. (fill up to the
line on the vial).
Note: A proper calibration requires exactly 10 ml volume of pH7.0
buffer.
11. Select a bottle of pH Indicator (Phenol Red). Unscrew
the cap and holding the bottle vertically; gently squeeze
20 drops of Phenol Red into the contents of the vial.
Replace the cap onto the Phenol Red bottle. Be careful
not to over-tighten the cap.
pH
Indicator
Phenol
Red
20 Drops
10 ml
of pH 7.0
12. Replace the cap onto the vial, ensuring it is screwed on finger tight.
Invert the vial several times to mix.
13. Gently place the vial into the sample well of the instrument, whilst
again aligning the ▼ mark on the vial with the ▲ mark on the meter.
14. Wait for one minute and then press the READ/ENTER key within 3
minutes from when the time the Phenol Red was added to the vial.
15. The meter will display [--Rd--] whilst the calibration standard is being
measured and then displays [SAVE] to prompt for calibration
acceptance and saving of calibration data.
pH
Sample
7.0 pH
READ
ENTER
CAL
pH
16. Press the READ/ENTER key. The meter will now accepts the
calibration value and momentarily display [HoLD] and CAL
annunciator before returning to the beginning of the calibration as in
step 3.
17. To continue with another calibration, press the MODE key to select
the desired calibration mode (for multi-parameter colorimeter).
18. To exit the calibration mode, press the ZERO key to return to the
measurement mode.
READ
ENTER
CAL
CAL
47
MODE
Press Mode to select
another calibration test
ZERO
Press ZERO to
return to
measurement mode
Calibration: pH
C401/301/101 Colorimeter
NOTE: If you wish to abort this calibration
process, do NOT press the READ/ENTER key as
in step 16. Press the ZERO key instead. The
meter will display [AbRT] and CAL annunciator to
signify that the calibration has been aborted
without saving the calibration value. The meter
will then return to the beginning of the user
calibration as in step 3.
CAL
NOTE: If an error occurs during calibration, the display will present an error
message. Please refer to Section 4 Troubleshooting Guide for details.
48
Restoring Factory Calibration
C401/301/201/101/102/103/104/105 Colorimeter
3.5
Restoring Factory Calibration
The C401/301/201/101/102/103/104/105 Colorimeter allows you to reset
the meter back to the factory default calibration values. This feature is
extremely useful when there are errors in calibration or when you have
new calibration standards.
1. With the meter switched off, press MODE and ON/OFF keys
simultaneously for about 2 seconds.
2. The meter will momentarily flash the model number and [URST] (UserReset) and then display [No].
3. Use MODE key to select (toggle) between [YES] or [No].
ƒ [YES] = To restore meter back to factory calibration values
ƒ [No] = To retain last calibrated values
4. After selecting [YES] or [No], press READ/ENTER key.
5. The meter will now flash the model number, the meter’s revision
number and enter the measurement selection mode.
Figure 9 shows the sequence for restoring factory calibration values.
49
Restoring Factory Calibration
C401/301/201/101/102/103/104/105 Colorimeter
METER OFF
Press MODE and ON/OFF
keys simultaneously and
hold for 2 seconds before
releasing
MODE
ON
OFF
MODE
Press MODE
key to select
YES or No
To restore factory
calibration
READ
ENTER
READ
ENTER
Meter’s Model Number
Meter’s Revision Number
Measurement Selection Mode
The meter is now ready for measurement
Figure 9: Restoring Factory Calibration
50
To retain last
calibration values
without retrieving
factory calibration.
Troubleshooting Guide
C401/301/201/101/102/103/104/105 Colorimeter
4 TROUBLESHOOTING GUIDE
The C401/301/201/101/102/103/104/105 Colorimeter routinely performs
self-diagnostics, and will automatically generate messages to provide you
with specific diagnostic information. These messages are for your use and
do not indicate a reduction in the performance of the instrument or a
failure of any component in the instrument, unless otherwise stated in this
list.
LCD
Message
Description
Corrective Actions
OR
When measured concentration
(or pH value) is above the
measurement range (chemistry
test specific)
Ensure sample value is within the
measurement range as listed in
the Specification table in Section
7.
UR
When measured concentration
(or pH value) is below the
measurement range (chemistry
test specific)
Ensure sample value is within the
measurement range as listed in the
Specification table in Section 7.
*ERR0
Inappropriate signal to
recognize the blank. Sample
absorbance is less than
blanking or blanking too low to
achieve specified resolution.
Ensure that blanking is done
before the chemical reagent is
added. Repeat the blanking
procedure.
*ERR1
Calibration Failure. The
absorbance of the calibration
standard is outside the range
allowed for the selected
calibration point.
Ensure calibration standard is
accurately prepared. Replace
calibration standard with a known
accurate value and recalibrate.
*ERR2
Excessive stray light detected.
Ensure the vial is fully snapped in
the sample well.
*ERR3
Lamp Failure. LED is faulty.
Return the unit for repair.
Low battery indication. The
batteries need to be replaced.
Replace the batteries.
* If an error message appears, take the
appropriate corrective action and re-do the
desired procedure. If the problem persists,
contact Eutech Instruments or your dealer.
See Sections on Warranty and Return of
Items on page 56.
51
Routine Maintenance
C401/301/201/101/102/103/104/105 Colorimeter
5 ROUTINE MAINTENANCE
The supplied carrying case is optimal for protecting the instrument. If you
do not plan on leaving the instrument in the supplied carrying case, when
not in use, ensure that the instrument has been turned off and that a clean
sample vial fitted with a black cap has been placed in the sample well.
This will ensure that a minimal amount of dust and/or debris will be able to
settle on the optics of the instrument.
5.1
Vials – Handling, Cleaning and Care
Proper colorimetric measurement of a sample requires the use of a vial
that is free of marks, smudges, scratches and any bacterial growth.
Therefore, sample vials must be handled with absolute care to avoid
contamination or damage, which might change the optical characteristics
of the glass. Scratches, fingerprints, and water droplets on the sample vial
or inside the sample well can cause stray light interference leading to
inaccurate readings.
Cleaning the vial is accomplished by washing the interior and exterior of
the vial in a detergent solution. Once cleaned, the vial should be rinsed
thoroughly 8 to 10 times with clean distilled water to eliminate the
possibility of detergent buildup and streaking.
Sample vials should always be handled from the top or by the cap to avoid
fingerprints or smudges. After a vial has been filled with a sample and
capped, the outside surface should be wiped with a clean, lint-free
absorbent cloth until it is dry. Cleaned and dried vials should be stored
with the black caps on. The vial can be stored in the carrying case. During
normal operation you may use any typical glass cleaner along with a lint
free cloth or tissue (Kimwipes®), to clean the outside of the vials.
52
Accessories
C401/301/201/101/102/103/104/105 Colorimeter
6 ACCESSORIES
The items shown below are recommended accessories and replacement
parts for the instrument.
Item Description
Eutech
Instruments
Oakton
Instruments
Order Code.
Order Code.
C-101 pH Colorimeter with sample vials, a 30 ml
bottle, pH Indicator (Phenol Red) Reagent Kit and
batteries in a rugged carrying case
ECC101
35645-10
C-102 Cyanuric Acid Colorimeter with sample
vials, Cyanuric Acid Reagent Kit and batteries in a
rugged carrying case
ECC102
35645-12
C-103 Chlorine Dioxide Colorimeter with sample
vials, Chlorine Dioxide (Glycine) Reagent Kit,
Chlorine Free Reagent Kit and batteries in a
rugged carrying case
ECC103
35645-12
C-104 Bromine Colorimeter with sample vials,
Chlorine Total Reagent Kit and batteries in a
rugged carrying case
ECC104
35645-14
C-105 Ozone Colorimeter with sample vials,
Chlorine Total Reagent Kit and batteries in a
rugged carrying case
ECC105
35645-15
C-201 Free/ Total Chlorine Colorimeter with
sample vials, Chlorine, Free (DPD) Reagent Kit,
Chlorine, Total (DPD) Reagent Kit and batteries in
a rugged carrying case
ECC201
35645-20
C-301 Free/ Total Chlorine/ pH Colorimeter with
sample vials, a 30 ml bottle, Chlorine, Free (DPD)
Reagent Kit, Chlorine, Total (DPD) Reagent Kit,
pH Indicator (Phenol Red) Kit and batteries in a
rugged carrying case
ECC301
35645-30
C-401 Free/ Total Chlorine/ pH/ Cyanuric Acid
Colorimeter with sample vials, a 30 ml bottle,
Chlorine, Free (DPD) Reagent Kit, Chlorine, Total
(DPD) Reagent Kit, pH Indicator (Phenol Red) Kit,
Cyanuric Acid Reagent Kit and batteries in a
rugged carrying case
ECC401
35645-40
Sample Vials – pack of 3 vials
ECTN100CUVKT
35653-55
pH Indicator (Phenol Red) Kit
94X377004
35645-60
Cyanuric Acid Reagent Kit
94X377003
35645-62
Chlorine, Free (DPD) Reagent Kit
94X377001
35645-64
Chlorine, Total (DPD) Reagent Kit
94X377002
35645-66
Chlorine Dioxide (Glycine) Reagent Kit
94X377005
35645-70
53
Specifications
C401/301/201/101/102/103/104/105 Colorimeter
7 SPECIFICATIONS
CHLORINE FREE & TOTAL
Automatic Range Selection
0 – 1.99 ppm
2.0 – 6.0 ppm
Resolution
0.01 ppm (0 – 1.99 ppm)
0.1 ppm (2.0 – 6.0 ppm)
Accuracy
+/- 0.02 ppm (0 – 1.99 ppm)
+/- 0.2 ppm (2.0 – 6.0 ppm)
CYANURIC ACID
Automatic Range Selection
5 – 90 ppm
Resolution
1 ppm (5 – 90 ppm)
Accuracy
+/- 4 ppm
pH
Automatic Range Selection
5.9 – 8.2 pH
Resolution
0.1 pH (5.9 – 8.2 pH)
Accuracy
+/- 0.1 pH (5.9 – 8.2 pH)
CHLORINE DIOXIDE
Automatic Range Selection
0 – 3.79 ppm
3.8 – 11.4 ppm
Resolution
0.01 ppm ± 1 digit (0 – 3.79 ppm)
0.1 ppm ± 1 digit (3.8 – 11.4 ppm)
Accuracy
+/- 0.02 ppm ± 2 digits (0 – 3.79 ppm)
+/- 0.2 ppm ± 2 digits (3.8 – 11.4 ppm)
BROMINE
Automatic Range Selection
0 – 4.49 ppm
4.5 – 13.5 ppm
Resolution
0.02 ppm ± 1 digit (0 – 4.49 ppm)
0.2 ppm ± 1 digit (4.5 – 13.5 ppm)
Accuracy
+/- 0.03 ppm ± 3 digits (0 – 4.49 ppm)
+/- 0.3 ppm ± 3 digits (4.5 – 13.5 ppm)
OZONE
Automatic Range Selection
0 – 1.39 ppm
1.4 – 4.1 ppm
Resolution
0.01 ppm (0 – 1.39 ppm)
0.1 ppm (1.4 – 4.1 ppm)
Accuracy
+/- 0.02 ppm (0 – 1.39 ppm)
+/- 0.2 ppm (1.4 – 4.1 ppm)
54
Specifications
C401/301/201/101/102/103/104/105 Colorimeter
Measurement Method
Photometric
Light Source
Light Emitting Diode (LED)
Wavelength
525 nm
Detector
Silicon photodiode
Absorbance Range
0 – 2.5 Abs
Photometric Precision
+/- 0.0015 Abs
Calibration Points
User selectable; 1 point per colorimetric test
Display
4-digit 14-segments customized liquid
crystal display with annunciators
Sample Cells
Borosilicate glass with screw caps, fill line
and indexing mark
Height x diameter: 51 x 25 mm ( 2 x 1 in)
Sample Required
10 ml (0.33 oz)
Operating Temperature
Range
0 – 50°C (32°F to 122°F)
Sample Temperature
Range
0 – 50°C (32°F to 122°F)
Operating Humidity Range
0-90% RH non-condensing at 30°C (86°F)
Power Supply
4 AAA alkaline batteries
Battery Life
> 3000 tests
Electromagnetic
Compliance (EMC)
Emitted Interference - EN 61326
Immunity to Interference - EN 61326
Enclosure Rating
IP67
Insulation Rating
Pollution degree 2
Weight
Instrument: 200 g (7 oz)
Instrument in carrying case: 1.25 kg (2.75
lb)
Dimensions
Instrument: 6.8(W) x 15.5(L) x 4.6(H) cm;
(2.7 x 6.1 x 1.8 in)
Carrying case: 16(W) x 35(L) x 12(H) cm;
(6.3 x 13.8 x 4.7 in)
55
Warranty and Return of Items
C401/301/201/101/102/103/104/105 Colorimeter
8
WARRANTY
The Colorimeters is supplied with a 2-year warranty from manufacturing
defects.
If repair or adjustment is necessary and has not been the result of abuse
or misuse within the designated period, please return – freight pre-paid –
and correction will be made without charge. Eutech Instruments/ Oakton
Instruments will determine if the product problem is due to deviations or
customer misuse.
Out of warranty products will be repaired on a charged basis.
Exclusions
The warranty on your instrument shall not apply to defects resulting from:
•
•
•
Improper or inadequate maintenance by customer
Unauthorized modification or misuse
Operation outside of the environment specifications of the products
Waterproof Seal: Opening the instrument enclosure (excluding the
battery compartment) may void the warranty.
9 RETURN OF ITEMS
Authorization must be obtained from our Customer Service Department or
authorized distributor before returning items for any reason. A “Return
Goods Authorization” (RGA) form is available through our Authorized
Distributor. Please include data regarding the reason the items are to be
returned. For your protection, items must be carefully packed to prevent
damage in shipment and insured against possible damage or loss. Eutech
Instruments/ Oakton Instruments will not be responsible for damage
resulting from careless or insufficient packing. A restocking charge will be
made on all unauthorized returns.
NOTE:
Eutech Instruments Pte Ltd/ Oakton Instruments reserve the right to make
improvements in design, construction, and appearance of products without
notice
.
56
For more information on Eutech Instruments/ Oakton Instruments’ products,
contact your nearest distributor or visit our website listed below:
Eutech Instruments Pte Ltd
Blk 55, Ayer Rajah Crescent,
#04-16/24 Singapore 139949
Tel: (65) 6778 6876
Fax: (65) 6773 0836
E-mail:
marketing@eutechinst.com
Web-site:
www.eutechinst.com
Oakton Instruments
P.O Box 5136,
Vernon Hills, IL60061, USA
Tel: (1) 888-462-5866
Fax: (1) 847-247-2984
E-mail:
info@4oakton.com
Web-site:
www.4oakton.com
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