59570-88
POCKET COLORIMETER™ II
ANALYSIS SYSTEMS
INSTRUCTION MANUAL
Chlorine (Cl
2
)
© Hach Company, 2006. All rights reserved. Printed in the U.S.A. te/dk 09/06 3ed
1—2
Important Note
This manual is intended for use with the following Pocket Colorimeter™ II
instrument:
Chlorine (Cl
2
) Cat. No. 59530-00
1—3
Table of Contents
Safety Precautions............................................................................................... 1—7
Laboratory Safety............................................................................................... 1—7
Use of Hazard Information................................................................................1—7
Precautionary Labels........................................................ ....... ...........................1—8
Specifications......................................................................................................... 1—9
Instrument Keys and Display...........................................................................1—11
Instrument Cap Cord.........................................................................................1—12
Chlorine, Free and Total, LR...........................................................................1—15
Measuring Hints ...............................................................................................1—15
Accuracy Check................ ....... ....................................................... ....... ...........1—27
Interferences......................................................................................................1—29
Method Performance........................................................................................1—30
Chlorine, Free and Total, HR..........................................................................1—31
Measuring Hints ...............................................................................................1—31
............................................................................................................................1—38
Accuracy Check................ ....... ....................................................... ....... ...........1—39
Interferences......................................................................................................1—41
1—4
Table of Contents, continued
Method Performance........................................................................................1—42
Spec√™ Secondary Standards for DPD Chlorine.....................................1—43
Using the Spec
√ Standards................................. .............................................1—44
Summary of Method..........................................................................................1—45
Replacement Parts..............................................................................................1—46
Instrument Operation..........................................................................................2—3
Key Functions........................... ...........................................................................2—3
Menu Selections... ...... ....... ....................................................... ...........................2—4
Switching Ranges................................................................................................2—4
Setting the Time..................................................................................................2—4
Recalling Stored Measurements........................................................................2—5
Battery Installation.............................................................................................2—6
Error Codes..............................................................................................................2—9
Error Messages ....................................................................................................2—9
1—5
Table of Contents, continued
Standard Calibration Adjust..........................................................................2—13
User-Entered Calibration ................................................................................2—15
Overview............................................................................................................2—15
Calibration Procedure Using Prepared Standards........................................2—17
Entering a Predetermined Calibration Curve..................................... ...... .....2 —2 0
Editing a User-entered or Factory Calibration Curve................ ....... ...... .....2 —2 2
Exiting the Calibration Routine......................................................................2—24
Deleting Calibration Points........................................................... ..................2—24
Retrieving the Factory Calibration.................................................................2—25
Maximum/Minimum Displayed Value....... ...... ....... .......................................2—26
Certification..........................................................................................................2—28
How to Order........................................................................................................2—35
Repair Service......................................................................................................2—37
Warranty................................................................................................................2—38
1—6
1—7
Safety Precautions
Please read this entire manual before unpacking, setting up, or operating this
instrument. Pay particular attention to all danger and caution statements. Failure
to do so could result in serious injury to the operator or damage to the equipment.
To ensure the protection provided by this equipment is not impaired, do not use or
install this equipment in any manner other than that which is specified in
this manual.
Laboratory Safety
As part of good laboratory practice, pl eas e familiarize yourself with the reagents
used in these procedures. Read all product labels and the m aterial safety data
sheets (MSDS) before using them. It is always good practice to wear safety glasses
when handling chemicals. Foll ow instructions carefully. Rinse thoroughly if
contact occurs. If you have questions about reagents or procedures, please contact
the manufacturer or distributor.
Use of Hazard Information
If multiple hazards exist, this manu al wi ll use th e sign al wo rd (Danger, Caution,
Note) corresponding to the greatest hazard.
1—8
Safety Precautions, continued
DANGER
Indicates a potentially or imminently hazardous situation which, if not
avoided, could result in death or serious injury.
CAUTION
Indicates a potentially hazardous situation that may result in minor or
moderate injury.
NOTE
Information that requires special emphasis.
Precautionary Labels
Please pay particular attention to labels and tags attached to the instrument.
Personal in ju ry or da mage to the instrument could occur if not observed.
This symbol, if noted on the instrume n t, referen ces the instruct io n manual
for operational and/or safety inform ation.
1—9
Specifications
Lamp: Light emitting diode (LED)
Detector: Silicon photodiode
Photometric precision: ± 0.0015 Abs
Filter bandwidth: 15 nm
Wavelength: 528 nm
Absorbance range: 0–2.5 Abs
Dimensions: 3.2 x 6.1 x 15.2 cm (1.25 x 2.4 x 6 inches)
Weight: 0.2 kg (0.43 lbs)
Sample cells: 1 cm (10 mL), 25 mm (10 mL)
Operating conditions: 0 to 50 °C (32 to 122 °F); 0 to 90% relative humidity
(noncondensing)
Power supply: Four AAA alkaline batteries; approximate life is 2000 tests*
* Backlight usage will decrease battery life.
1—10
OPERATION
DANGER
Handling chemical samples, standards, and reagents can be dangerous. Review the necessary
Material Safety Data Sheets and become familiar with all safety procedures before handling
any chemicals.
DANGER
La manipulation des échantillons chimiques, étalons et réactifs peut être danger euse. Lir e les Fiches
de Données de Sécurité des Produits (FDSP) et se familiariser avec toutes les procédures de sécurité
avant de manipuler tous les produits chimiques.
PELIGRO
La manipulación de muestras químicas, estándares y reactivos puede ser peligro s a. Revi se las fichas
de seguridad de materiales y familiarícese con los procedimientos de seguridad antes de manipular
productos químicos.
GEFAHR
Das Arbeiten mit chemischen Proben, Standards und Reagenzien ist mit Gefahren verbunden. Es
wird dem Benutzer dieser Produkte empfohlen, sich vor der Arbeit mit sicheren Verfahrensweisen
und dem richtigen Gebrauch der Chemikalien vertraut zu machen und alle entsprechenden
Materialsicherheitsdatenblätter aufmerksam zu lesen.
PERIGO
A manipulação de amostras, padrões e reagentes químicos pode ser perigosa. Reveja a folha dos
dados de segurança do material e familiarize-se com todos os procedimentos de segurança antes
de manipular quaisquer produtos químicos.
PERICOLO
La manipolazione di campioni, standard e reattivi chimici può essere pericolosa. La preghiamo di
prendere conoscenza delle Schede Techniche necessarie legate alla Sicurezza dei Materiali e di
abituarsi con tutte le procedure di sicurezza prima di manipolare ogni prodotto chimico.
1—11
Instrument Keys and Display
Item Description
1 POWER/BACKLIGHT Key
2
ZERO/SCROLL Key
3
MENU Key
4 Numeric Display
5 Range Indicator
6 Range Indicator
7 Menu Indicator
8 Calibration Adjusted Indicator
9 Battery Low Indicator
10
READ/ENTER Key
1—12
Instrument Cap Cord
The instrument cap for the Pocket Colorimeter™ II doubles as a light shield.
Accurate measurements cannot be obtained unless the sample or blan k is covered
with the cap. Use the instrument cap cord to secure the cap to the body of the
colorimeter and prevent loss of the cap. See Figu re 1 on page 1—13.
1. Loop the instrument cap cord through the ring on the cap.
2. Remove the battery compartment cover. Press the knotted end of the cord into
the hole indicated by the arro w.
3. Slide the cord into the slot on the battery compartment cover. Snap the cover
into place.
1—13
Instrument Cap Cord, continued
Figure 1 Attaching the Instrument Cap Cord
1—14
1—15
Chlorine, Free and Total, LR (0.02 to 2.00 mg/L Cl
2
)
Method 8021 (Free)
For water, treated water, estuary water, and sea water
Method 8167 (Total)
For water, treated water, wastewater, estuary water, and sea water
DPD Method*
USEPA accepted for reporting drinking water analyses**
(free and total chlorine) and wa stew ater an alys es** (total chlori ne only)
Measuring Hints
• Analyze samples immediately . Do not use plastic containers to collect sample s.
• For best results, dedicate a set of cells to each free chlorine and total chlorine test.
Note:
The Pocket Colorimeter II is designed to measure solutions contained in sample cells.
DO NOT
dip the meter in the sample or pour the sample directly into the cell holder.
* Adapted from Standard Methods for the Examination of Water and Wastewater.
** Procedure is equivalent to USEPA method 330.5 for wastewater and Standard Method
4500-Cl G for drinking water.
1—16
Chlorine, Free and Total, LR, continued
Using Powder Pillows (USEPA accepted for reporting)
1.Fill a 10-mL cell with
sample (the blank). Cap.
Note:
Samples must be
analyzed immediately and
cannot be preserved for
later analysis.
2.Press the POWER key to
turn the meter on.
The arrow sh ould indicate
the low range channel (LR).
Note:
See page 2—4 for
information on selecting
the correct range channel.
3.Remove the meter cap.
Place the blank in the cell
holder with the diamond
mark facing the keypad.
Fit the meter cap over the
cell compartment to cover
the cell.
Note:
Wipe excess liquid
and finger prints off
sample cells.
1—17
Chlorine, Free and Total, LR, continued
4.Press ZERO/SCROLL.
The display will show
“- - - -” then “0.00”.
Remove the blank fro m the
cell holder.
5.Fill a second 10-mL cell
to the 10-mL line with
sample.
Note:
Do not use the same
sample cells for free and
total chlorine analysis
without thoroughly rinsing
the cells with sample
between free and total
tests.
6.Ad d the contents of one
DPD Free Chlorine Powder
Pillow or one DPD Total
Chlorine Powder Pillow to
the sample cell (the prepar ed
sample).
Note:
SwifTest™
Dispensers for Free or Total
Chlorine can be used in
place of powder pillows.
See Using the SwifTest™
Dispenser (USEPA accepted
for reporting) on page 1—
23.
1—18
Chlorine, Free and Total, LR, continued
7.Cap and sh ake gently for
20 seconds.
Note:
Shaking dissipates
bubbles that may form in
samples with dissolved
gases.
Note:
A pink color will
develop if chlorine is
present.
8.For free chlorine, place
the prepared sample cell in
the cell holder. Cover with
the instrument cap and
proceed to step 10 within
one minute after adding the
DPD Free Pillow.
Note:
Accuracy is not
affected by undissolved
powder.
Note:
Wipe off sample
cells.
9.For total chlorine, place
the prepared sample in the
cell holder and cov er the cell
with the instrument cap.
Wait three to six minutes
after adding the DPD Total
Pillow.
Proceed to step 10.
1—19
Chlorine, Free and Total, LR, continued
10. Press READ/ENTER.
The instrument will show
“- - - -” followed by the
results in mg/L chlorine.
Note:
If the sample temporarily turns yellow after reagent
addition, or if the display shows overrange (page 2—12) dilute
a fresh sample and repeat the test. A slight loss of chlorine
may occur because of the dilution. Multiply the result by the
appropriate dilution factor.
1—20
Chlorine, Free and Total, LR, continued
Using AccuVac® Ampuls (USEPA accepted for reporting)
1.Fill a 10-mL sample cell
with sample (the blank).
Cap. Collect at least 40 mL
of sample in a 50-mL
beaker.
Note:
Empty AccuVac
Ampuls are available for
use as blanks. See
OPTIONAL REAGENTS on
page 1—47.
2.Press the POWER key to
turn on the meter.
The arrow in the di splay
should indicate the low
range cha nnel (LR).
See page 2—4 for
information on selecting the
correct range channel.
3.Remove the instrument
cap. Place the blank in the
cell holder , with the diamond
mark facing the keypad.
Cover the cell with the
instrument cap.
Note:
Wipe liquid and
finger prints off sample
cells.
1—21
Chlorine, Free and Total, LR, continued
4.Press ZERO/SCROLL.
The display will show
“- - - -” then “0.00”.
Remove the blank.
5.Fill a DPD Free Chlorine
Reagent AccuVac® Ampul or
a DPD Total Chlorine
Reagent AccuVac Ampul
with sample.
Note:
Keep the tip
immersed until the ampule
fills completely.
6.Quickly inv ert the ampule
several times to mix. Wipe
off any liquid or fingerprints.
Note:
A pink color will
form if chlorine is present.
Note:
Accuracy is not
affected by undissolved
powder.
1—22
Chlorine, Free and Total, LR, continued
7.For free chlorine, place
the prepared sample in the
cell holder . Cover the ampule
with the instrument cap and
proceed to step 9 within one
minute after filling the
AccuVac Ampul.
Note:
Wipe liquid off the
AccuVac Ampul.
8.For total chlorine, insert
the ampule into the cell
holder, then cover with the
instrument cap. Wait three
to six minutes after filling
the AccuV ac Ampul. Proceed
to step 9.
Note:
Wipe liquid off the
AccuVac Ampul.
9.Press READ/ENTER. The
instrument will show
- - - - followed by the results
in mg/L chlorine.
Note:
If the sample temporarily turns yellow after reagent addition, or if the display shows
overrange (page 2—12) dilute a fresh sample and repeat the test. A slight loss of chlorine may
occur because of the dilution. Multiply the result by the appropriate dilution factor.
1—23
Chlorine, Free and Total, LR, continued
Using the SwifTest™ Dispenser (USEPA accepted for reporting)
1.Fill a 10-mL cell with
sample (the blank). Cap.
Note:
Samples must be
analyzed immediately and
cannot be preserved for
later analysis.
2.Press the POWER key to
turn the meter on.
The arrow sh ould indicate
the low range channel (LR).
Note:
See page 2—4 for
information on selecting
the correct range channel.
3.Remove the meter cap.
Place the blank in the cell
holder with the diamond
mark facing the keypad.
Fit the meter cap over the
cell compartment to cover
the cell.
Note:
Wipe excess liquid
and finger prints off
sample cells.
1—24
Chlorine, Free and Total, LR, continued
4.Press ZERO/SCROLL.
The display will show
“- - - -” then “0.00”.
Remove the blank fro m the
cell holder.
5.Fill a second 10-mL cell
to the 10-mL line with
sample.
Note:
Do not use the same
sample cells for free and
total chlorine analysis
without thoroughly rinsing
the cells with sample
between free and total
tests.
6.Use the SwifTest™
Dispenser to add one
dispensation of DPD Free
Chlorine reagent or one
dispensation of DPD Total
Chlorine reagent to the
sample cell (the prepared
sample).
1—25
Chlorine, Free and Total, LR, continued
7.Cap and sh ake gently for
20 seconds.
Note:
Shaking dissipates
bubbles that may form in
samples with dissolved
gases.
Note:
A pink color will
develop if chlorine is
present.
8.For free chlorine, place
the prepared sample cell in
the cell holder and cover
with the inst rument cap.
Proceed to step 10 within
one minute after adding the
DPD Free Pillow.
Note:
Accuracy is not
affected by undissolved
powder.
Note:
Wipe off sample
cells.
9.For total chlorine,
place the prepared sample
in the cell holder and cover
with the instrument cap.
Wait three to six minutes
after adding the DPD Total
Pillow.
Proceed to step 10.
1—26
Chlorine, Free and Total, LR, continued
10. Press READ/ENTER.
The instrument will show - -
- - followed by the results in
mg/L chlorine.
Note:
If the sample temporarily turns yellow after reagent
addition, or if the display shows overrange (page 2—12) dilute
a fresh sample and repeat the test. A slight loss of chlorine
may occur because of the dilution. Multiply the result by the
appropriate dilution factor .
1—27
Chlorine, Free and Total, LR, continued
Accuracy Check
Standard Additions Method
1. Use the ampule breake r to snap the neck off a low range Chlorine Standard
Solution Ampule, 20–30 mg /L Cl
2
.
2. Use a TenSette® pipet to add 0.1, 0.2, and 0.3 mL of standard to three 10-mL
samples. Swirl gently to mix. (For AccuVac Ampuls, use 0.2, 0.4, and 0.6 mL
of standard and a 25-mL sample in a 50-mL beaker.)
3. Analyze a 10-mL aliquot of each sample as described in the procedure. Each
0.1 mL of standard will cause an incremental increase in chlorine. The exact
value depends on the concentration of the ampule sta nd ard. Ch eck the
certificate enclosed with the ampules for the chlorine concentration and
calculation of the expected chlorine increase.
Standard Solution Method
Standard solutions for chlorine are difficult and time-consuming to prepare. Errors
can occur if attention to detail is not addressed during preparation of the
standards. The calibration curve is prepared under rigorous analytical laboratory
conditions. Use the factory calibration for most no rm al testing.
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