Hach POCKET COLORIMETER II, 59530-00 Instruction Manual

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.

1—28

Chlorine, Free and Total, LR, continued

A user calibration or a user-prepared chlorine standard may be required by a
regulatory official or agency. Two options are available on the
Pocket Colorimeter II to meet this requirement.

A chlorine standard may be prepared and used to validate the calibration curve
using the Standard Calibration Adjust feature (see page 2—13 for more
information). The concentration of the prepared standard must b e determined with
an alternate instrument such as a spectrophotometer, colorimeter, or by using an
alternate method such as amperometric titr ation. The concentration of the chlorine
standard for the LR procedure must be between 0.50 and 1.50 mg/L chlorine.

In addition, a user-generated calibration curve can be programmed into the
Pocket Colorimeter™ II. See User-Ent ered Calib rati on on pa ge 2—15 for more
information.

1—29

Chlorine, Free and Total, LR, continued

Interferences

Interfering Substance Interference Levels and Treatments

Acidity Greater than 150 mg/L CaCO3. May not develop full color or

color may fade instantly. Neutralize to pH 6–7 with 1 N Sodium
Hydroxide. Determine amount to be added on a separate 10-mL
sample, then add the same amount to the sample being tested.
Correct for the additional volume.

Alkalinity Greater than 250 mg/L CaCO

3

. May not develop full color or
color may fade instantly. Neutralize to pH 6–7 with 1 N Sulfuric
Acid. Determine amount to be added on a separate 10-mL
sample, then add the same amount to the sample being tested.
Correct for the additional volume.

Bromine, Br

2

Interferes at all levels

Hardness No effect at less than 1,000 mg/L as CaCO

3

Iodine, I

2

Interferes at all levels

1—30

Chlorine, Free and Total, LR, continued

Method Performance

Estimated Detection Limit (EDL) = 0.02 mg/L
Typical precision (95% confindence interval) = 1.00 ± 0.05 mg/L

Manganese, Oxidized
(Mn

4+

, Mn7+) or Chromium,

Oxidized (Cr

6+

)

1. Adjust sample pH to 6–7.

2. Add 3 drops Potassium Iodide (30-g/L) (Cat. No. 343-32) to a

10-mL sample.

3. Mix and wait one minute.

4. Add 3 drops Sodium Arsenite (5-g/L) (Cat. No. 1047-32) and

mix.

5. Analyze 10 mL of the treated sample as described in the
procedure.

6. Subtract the result from this test from the original analysis
to obtain the correct chlorine concentration.

Monochloramine, LR
method

Causes a gradual drift to higher readings. When read within
1 minute after reagent addition, 3 mg/L monochloramine causes
less than a 0.1 mg/L increase in the reading.

Ozone Interferes at all levels.

Interfering Substance Interference Levels and Treatments

1—31

Chlorine, Free and Total, HR (0.1 to 8.0 mg/L Cl

2

)

For water, treated water, estuary water, and seawater (Free Chlorine)
For water, treated waters, wastewater, estuary water, and seawater
(Total Chlorine)

DPD Method*

USEPA accepted for reporting drinking water analyses (fr ee and total chlorine)
and wastewater analyses (total chlorine).

Measuring Hints

• If the chlorine concentration is typically less than 2 mg/L, use the low range
procedure.

• Analyze samples immediately . Do not use plastic containers to collect samples.
For best results, dedicate a set of sample cells to each test (free and total).

• If the sample temporarily turns yellow after reagent ad dit io n or shows
overrange (page 2—12), dilute a fresh sample and repeat the test. A slight loss
of chlorine may occur. Multiply the result by the dilution factor.

* Adapted from Standard Methods for the Examination of Water and Wastewater.

1—32

Chlorine, Free and Total, HR, continued

• High range free chlorine determinations are subject to variable levels of
interferences from monochloramine. See Interferences on page 1—41.

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.

1—33

Chlorine, Free and Total, HR, continued

Using Powder Pillows

1.Fill a 1-cm/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

high range channel (HR).

Note:

See page 2—4 for
information on selecting the
correct range channel.

3.Remove the meter cap.

Place the blank into the
cell holder, with the
diamond mark facing the
back of the cell holder.
Cover the cell with the cap.

Note:

Wipe liquid off

sample cells.

1—34

Chlorine, Free and Total, HR, continued

4.Press: ZERO/SCROLL

The display will show
“- - - -” followed by “0.0”.

Remove the blank.

5.Fill another 1-cm/10-mL

sample cell to the 5-mL line
with sample. Cap.

Note:

Do not use the same
sample cells for free and total
chlorine without thoroughly
rinsing the cells between the
free and total tests.

6.Ad d the contents of two

DPD Free Chlorine or two
DPD Total Chlorine Powder
Pillows to the sample cell
(the prepare d sample).
Cap the cell and shake gently
for 20 seconds.

Note:

Gentle shaking
dissipates bubbles which may
form in samples containing
dissolved gases.

1—35

Chlorine, Free and Total, HR, continued

7.For free chlorine, place the

prepar ed sample cell in the cell
holder and cover with the
instrument cap within one
minute after adding the DPD
Free Pillow.

Proceed immediately t o
step 9.

Note:

The SwifTest™ Dispenser
can be used in place of the
powder pillow (see page 1—36).

8.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 Pillows. Pr oceed to
step 9.

Note:

Wipe off sample cells.

9.Press READ/ENTER.

The instrument will
show “- - - -” followed by
the results in mg/L chlorine
(Cl

2

).

1—36

Chlorine, Free and Total, HR, continued

Using the SwifTest™ Dispenser

1.Fill a 1-cm/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 s hould indicate the

high range channel (HR).

Note:

See page 2—4 for
information on selecting the
correct range channel.

3.Remove the meter cap.

Place the blank into the cell
holder, with the diamond
mark facing the back of the
cell holder. Cover the cell
with the cap.

Note:

Wipe liquid off sample

cells.

1—37

Chlorine, Free and Total, HR, continued

4.Press: ZERO/SCROLL

The display will show
“- - - -” followed by “0.0”.

Remove the blank.

5.Fill another 1-cm/10-mL

sample cell to the 5-mL line
with sample. Cap.

Note:

Do not use the same
sample cells for free and total
chlorine without thoroughly
rinsing the cells between the
free and total tests.

6.Use the SwifTest™

Dispenser to add two
dispensations of DPD Free
Chlorine reagent or DPD
Total Chlorine reagent to
the sample cell
(the prepare d sample).
Cap the cell and shake
gently for 20 seconds.

Note:

Gentle shaking

dissipates bubbles.

1—38

Chlorine, Free and Total, HR, continued

7.For free chlorine, place the

prepar ed sample cell in the cell
holder and cover with the
instrument cap within one
minute after adding the DPD
Free Pillow.

Proceed immediately to

step 9

.

Note:

Wipe liquid off sample

cells.

8.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 Pillows. Pr oceed to

step 9

.

Note:

Wipe liquid off sample

cells.

9.Press READ/ENTER.

The instrument will show
“- - - -” followed by the
results in mg/L chlorine (Cl

2

).

1—39

Chlorine, Free and Total, HR, continued

Accuracy Check

Standard Additions Method

a. Use the ampule breake r to snap the neck off a high range Chlorine

Standard Solution Ampule, 50–70 mg/L Cl

2

.

b. Use a TenSette

®

pipet to add 0.1, 0. 2, and 0.3 mL of standard to three 5-mL

samples. Swirl gently to mix.

c. Analyze each sample as described in the procedure. Each 0.1 mL of

standard will cause an incremental in crease in chlorine. The exact value
depends on the concentration of the ampule standard. Check the certificate
enclosed with the ampules for calculation of the expected increase in the
chlorine concentration.

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.

1—40

Chlorine, Free and Total, HR, continued

A user calibration or a user-prepared chlorine standard may be required by a
regulatory official or agency. Two options are available on the
Pocket Colorimeter™ II to meet this requirement.

A chlorine standard may be prepared and used to validate the calibration curve
using the Standard Calibration Adjust feature (see page 2—13 for more
information). The concentration of the prepared standard must b e determined with
an alternate instrument such as a spectrophotometer, colorimeter, or by using an
alternate method such as amperometric titr ation. The concentration of the chlorine
standard for the HR procedure must be between 4.5 and 7.0 mg/L chlo rine.

In addition, a user-generated calibration curve can be programmed into the
Pocket Colorimeter™ II. See User-Ent ered Calib rati on on pa ge 2—15 for more
information.

1—41

Chlorine, Free and Total, HR, continued

Interferences

See additional Interferen ces on page 1—29.

Interfering Substance Interference Levels and Treatments

Monochloramine For conventional free chlorine disinfection (beyond the

breakpoint), monochloramine concentrations are very low. If
monochloramine is present in the sample, its interference in the
free chlorine test varies with the temperature, the relative
amount of monochloramine to free ammonia, and the time
required to do the analysis. Approximate interference levels of
monochloramine in the free chlorine test are listed below (as
mg/L Cl

2

).

NH2Cl Sample Temperature °C (°F)

(as Cl2) 5 (40) 10 (50) 20 (68) 30 (83)

1.2 0.2 0.2 0.3 0.3

2.5 0.4 0.5 0.6 0.6

3.5 0.5 0.6 0.7 0.8

1—42

Chlorine, Free and Total, HR, continued
Method Performance

Estimated Detection Limit (E DL) = 0.1 mg /L
Typical precision (95% confidence interval) = 5.0 ± 0.2 mg/L

1—43

Specê Secondary Standards for DPD Chlorine

Note:

Due to improvements in the optical system of the Pocket Colorimeter™ II, the tolerance
ranges and values on the Certificate of Analysis of previously purchased Spec √ standards
may no longer be valid. Obtain a new set of standards, or use the Pocket Colorimeter II to
assign new values to existing standards.

The DPD Chlorine Spec√ Secondary Standards are avai lable to quickly check the
repeatability of the Pocket Colorimeter™ II instrument (see OPTIONAL REAGENTS
on page 1—47).

After initial measurements for the Spec √ standards are collected in the low range
(LR) channel, the standards can be re-checked as often as desired to ensure the
instrument is working consistently.

The standards do not ensure reagent quality nor do they ensure the accuracy of the
test results. Analysis of real standard solutions using the kit reagents is required to
verify the accuracy of the entire Pocket Colorimeter system. The Spec√ Standards
should NEVER be used to calibrate the instrument. The certificate of analysis lists
the expected value and tolerance for each Spec√ Standard.

Note:

Before proceeding, make sure the instrument is in the low

(LR)

range channel. See

Switching Ranges on page 2—4.

1—44

Specê Secondary Standards for DPD Chlorine, continued
Using the Spec√ Standards

1. Place the colorless Spec√ blank into the cell holder with the alignment mark
facing the keypad. Tightly cover the cell with the instrument cap.

2. Press

ZERO. The display will show “0.00”.

3. Place the STD 1 cell into the cell holder. Tightly cover the cell with the
instrument cap.

4. Press

READ/ENTER. Record the concentration measurement.

5. Repeat steps 3 and 4 with cells labeled STD 2 and STD 3.

6. Compare these measurements with previous measurements to verify the

instrument is performing consistently. (If these are the first measurements,
record them for comparison with later measurements.)

Note:

If the instrument is user-calibrated, initial standard measurements of the Spec √

Standards will need to be performed again for the user calibration.

1—45

Summary of Method

Chlorine can be present in water as free chlorine and as combined chlorine. Both
forms can coexist in the same solut ion and can be determined toget her a s total
chlorine. Free chlorine is present as hypochlorous acid or hypochlorite ion.
Combined chlorine represents a combination of chlorine-containing compunds
including but not limited to monochloramine, dichloramine, nitrogen trichloride,
and other chloro derivatives. The combined chlorine oxidizes triiodide ion (I

3

–

) to

iodine (I

2

). The iodine and free chlorine reacts with DPD
(N,N-diethyl-p-phenylenediamine) to form a red solution. The color intensity is
proportional to the total chlorine concentration. To determine the concentration of
combined chlorine, run a free chlorine test and a total chlorine test. Subtract the
results of the free chlorine test from the total chlorine test to obtain the combined
chlorine concentration.

The range of analysis using the DPD method for chlorine can be extended by
adding more indicator in proportion to sample volume. For example, two powder
pillows of DPD Chlorine Reagent are added to a 5-mL sample portion to extend the
range of analysis.

1—46

Replacement Parts

REQUIRED REAGENTS

Description Unit Cat. No.

Free Chlorine Tests

DPD Free Chlorine Reagent Powder Pillows..............................100/pkg .....21055-69

or

DPD Free Chlorine Reagent AccuVac

®

Ampuls

(low range test only) ..................................................... ....... ...... 25/pkg ....25020-25

SwifTest™ DPD Free Chlorine Reagent with dispenser..........250* tests ....28023-00

Total Chlorine Tests

DPD Total Chlorine Reagent Powder Pillows.............................100/pkg .....2 1056-69

or

DPD Total Chlorine Reagent AccuVac

®

Ampuls

(low range test only) ..................................................... ....... ...... 25/pkg ....25030-25

SwifTest™ DPD Total Chlorine Reagent with disp enser.........250* tests ....28024-00

REQUIRED APPARATUS (AccuVac® Ampuls)

Beaker, 50 mL ......................................................................................each ......500-41H

* 125 tests when performing the high range test

1—47

Replacement Parts, continued

OPTIONAL REAGENTS

Description Unit Cat. No.

Chlorine Standard Solution, 25–30 mg/L, 2-mL ................. .......20/pkg.....26300-20

Chlorine Standard Solution, 50–75 mg/L, 2-mL ................. .......20/pkg.....14268-20

Chlorine Standards, secondary, Spec

ê,

0.0, 0.2, 0.8 and 1.5 mg/L............................................................4/pkg.....26353-00

Empty AccuVac® Ampuls (for reading blanks)...........................25/pkg.....26779-25

Potassium Iodide Solution, 30 g/L....................................100 mL MDB*.........343-32

Spec

√ Secondary Standards, Chlorine .............................................each.....26353-00

Sodium Arsenite Solution, 5 g/L........................................ 100 mL MDB.......1047-32

Sodium Hydroxide Standard Solution, 1 N...................... 100 mL MDB.......1045-32

Sulfuric Acid Standard Solution, 1 N................................100 mL MDB.......1270-32

SwifTest™ DPD Free Reagent Replacement Vial...................250** tests.....21055-60

SwifTest™ DPD Total Reagent Replacement Vial..................250** tests.....21056-60

Wate r, deionized.............................................................................. .......4 L.........272-56

* Marked Dropper Bottle
** 125 tests when performing the high range test

1—48

Replacement Parts, continued

OPTIONAL APPARATUS

Description Unit Cat. No.

AccuVac® Snapper Kit.........................................................................each ....24052-00

Ampule Breaker Kit..................................................... ........................ each ....24846-00

Batteries, AAA, alkaline ...................................................................4/pkg ....46743-00

Caps for 10-mL sample cells.......... ............................................... 12 /pkg ....24018-12

Cylinder, graduated, 25 mL. glass.....................................................each ........ 508-40

Cylinder, graduated, 100 mL, glass...................................................each ........ 508-42

sens

ion™1 Basic Portable pH Meter, with electrode ......................each .....51700-10

Pipet, TenSette

®

, 0.1 to 1.0 mL ..........................................................each .....19700-01

Pipet Tips, For 19700-01 TenSette

®

Pipet.................................... 50/pkg .... 21856-96

Sample Cells, 10-mL with screw caps....................... ...... ................6 / pkg . ...24276-06

REPLACEMENT PARTS

Cap for 1-cm/10 mL sample cell .......................................................each . ...52626-00

Instrument Cap/light shield................... .............................................each ....59548-00

Instrument Manual................................. ....... ......................................each .... 59570-88

Sample Cells, 1-cm/10-mL.................................. .............................2/pkg ....48643-02

2—1

Section 2

Instrument Manual

2—2

2—3

Instrument Operation

Key Functions

Key Description Function

POWER On/Off/Backlight

To turn on the backlight, turn on the instrument, then
press and hold the power key until the backlight turns
on. Press and hold again to turn off the backlight. This
key functions the same in all instrument modes and
ranges.

ZERO/SCROLL In measurement mode, sets the instrument to zero.

In menu mode, scrolls through menu options. Also
scrolls numbers when entering or editing a value.

READ/ENTER In measurement mode, initiates sample measurement.

In menu mode, selects a menu option. When entering
numbers, moves one space to the right and executes
the function when the entry is complete.

2—4

Instrument Operation, continued

Menu Selections

Press the MENU key to access the menu selections.

Switching Ranges

1. Press the MENU key. The display will sho w “SE L”. A flashing arrow indicates
the current range.

2. Press the

READ/ENTER key to toggle between ranges.

3. Press

MENU again to accept and exit back to the measurement screen.

Setting the Time

1. Press the MENU key, then press the ZERO/SCROLL ke y un til th e di spla y shows
a time in the “00:00” format.

MENU Enter/Exit the menu mode

Press and hold for approximately 5 seconds to enter
user-entered method mode.

Key Description Function

2—5

Instrument Operation, continued

2. Press READ/ENTER. The digit to be edited will flash.

3. Use the

ZERO/SCROLL key to change the entry, then press READ/ENTER to

accept and advance to the next digit. The time is entered in 24-hour format.

Recalling Stored Measurements

1. Press the MENU key, then press the ZERO/SCROLL key until the display shows

RCL. The instrument automatically stores the last 10 measurements.

2. In RCL, press

READ/ENTER to recall the stored measurements, beginning with

the most recent measurement taken. The meter stores the measurement
number as 0 1 (most recent) through 1 0 (oldest), the time the measurement was
taken, and the measurement value. The

ZERO/SCROLL key allows for selection

of a specific measurement by number. The

READ/ENTER key scrolls thro ugh all

stored data points.

2—6

Instrument Operation, continued

Battery Installation

Figure 1 on page 2—7 provides an exp lod ed vi ew of battery installation.

1. Unhook the latch and remove the bat tery co mpartment cover. The polarities
are shown on the battery holder.

2. Place the four batteries provided with the instrument in the holder as indicated
and replace the battery compartment cover. The display will show the software
version number (e.g., “P 1.6”) after correct battery installation.

When replacing discharged batteries, always replace the complete set of four
alkaline batteries. Rechargeable batteries are not recommended and cannot be
recharged in the instrument.

Note:

The Low Battery icon will appear on the display when the batteries have 10 % battery life
remaining. The battery icon will flash when the batteries are too low to complete
measurements. See Instrument Keys and Display on page 1—11.

2—7

Instrument Operation, continued

Figure 1 Battery Installation

2—8

2—9

Error Codes

When the instrument canno t perfo r m th e funct io n in it iat ed by the operator, an
error message will appear in the display. Refer to the appropriate message
information below to determine what the problem is and how it can be corrected.
Resolve error messages in the order that they appear on the display. Service Centers
are listed in page 2—37.

Error Messages

1. E-0 No Zero (User mode)

Error occurs when trying to read a standard in the user calibration mode
before setting the meter to zero.

• Zero the instrument on an appropriate blank.

2. E-1 Ambient Light Er ro r

There is too much light present to take a valid measurement.

• Verify instrument cap is correctly seated.

• If the problem persists, contact a Service Center (page 2—37).

2—10

Error Codes, continued

3. E-2 LED Error

The LED (light source) is out of regulation.

• Replace batteries.

• Verify LED lights up (inside the cell holder) when the READ/ENTER or

ZERO/SCROLL key is pressed.

• If the problem persists, contact a Service Center (page 2—37).

Note: When an E-1 or E-2 error occurs on a measurement, the display will show “_.__”. (The

decimal place is determined by the chemistry.) If the E-1 or E-2 error occurs while
zeroing the meter , the meter will require the user to re-zero.

4. E-3 Standard Adjust Error

The value obtained on the prepared standard exceeds the adjustment limits
allowed for the standard concentration, or the concentration of the standard is
outside the concentration range allowed for standard calibration adjust.

• Prepare the standard and rerun according to the procedure.

• Prepare a standard at or near the recommended concentrations given in the

procedure.

• Verify that the concentration of the standard ha s been entered correctly.

2—11

Error Codes, continued

• If the problem persists, contact a Service Center (page 2—37).

5. E-6 Abs Error (User mode )

Indicates that the absorbance value is invalid, or indicates an attempt to make
a curve with less than two points.

• Enter or measure the absorbance value again.

• If the problem persists, contact a Service Center (page 2—37).

6. E-7 Standard Value Error (User mode)

Standard concentratio n is equ al to another standard concent r ati on tha t is
already entered.

• Enter the correct standard concentration.

• If the problem persists, contact a Service Center (page 2—37).

7. E-9 Flash Error

The meter is unable to save data.

• If the problem persists, contact a Service Center (page 2—37).

2—12

Error Codes, continued

8. Underrange—flashing number below stated test range

• Verify instrument cap is correctly seated.

• Check zero by measuring a blank. If error recurs, re-zero the instrument.

• If the problem persists, contact a Service Center (page 2—37).

Note: See Maximum/Minimum Displayed Value on page 2—26 for more information.

9. Overrange—flashing number above stated test range

Note: Flashing value will be 10% over the upper test limit.

• Check for light blockage.

• Dilute and retest sample.

Note: See Maximum/Minimum Displayed Value on page 2—26 for more information.

2—13

Standard Calibration Adjust

The Pocket Colorimeter™ II instrument is factory-calibrated and ready for use
without user calibration. Use of the factory calibration is recommended unless the
user is required to generate a calibration. The Standard Calibration Adjust can be
used to meet regulatory requirements.

This feature allows the factory default calibration curve to be adjusted with a
known standard. Use the standard described in the procedure.

1. Place a blank in the meter (in measurem ent mo de). Press

ZERO/SCROLL.

2. Place the reacted standard in the meter. Press

READ/ENTER.

3. Press

MENU, then press ZERO/SCROLL until the display shows “SCA”.

4. Press

READ/ENTER to display the standa rd calibration adjust valu e.

5. Press

READ/ENTER to adjust the curve to the displayed value. The meter will

return to the measurement mode and the Calibration Adjusted icon will appear
in the display window.

If an alternate concentration is used, or if a standard concentration is not given:

6. Repeat steps 1–4.

2—14

Standard Calibration Adjust, continued

7. Press ZERO/SCROLL to access the Edit function, then press READ/ENTER to
begin editing. The digit to be edited will flash. Use the

ZERO/SCROLL key to

change the entry, then press

READ/ENTER to accept and advance to the

next digit.
When the last digit is entered, press

READ/ENTER and the meter will adjust the

curve to the value entered. The meter will return to measurement mode and the
Calibration Adjusted icon will appear in the display window.

To turn off Standard Calibration Adjust (SCA):

1. Press

MENU.

2. Press

ZERO/SCROLL until “SCA” app e ars in the displa y.

3. Press

READ/ENTER, then press ZERO/SCROLL until “Off” appears in the display.

4. Press

READ/ENTER to turn off SCA.

Note: Perform another standard calibration adjust to turn SCA on again.
Note: For meters with factory-calibrated ranges or methods, Standard Calibration Adjust

(SCA) will be disabled when a user-entered method is programmed into the meter. To
turn SCA back on, restore the meter to factory default calibration. See Retrieving the
Factory Calibration on page 2—25.

2—15

User-Entered Calibration

Overview

The Pock et Colorimeter™ II will accept a user-prepared calibration curve. The curve
can extend from 0 to 2.5 absorbance. A user-prepared calibration curve may be
entered into any channel that does not contain a factory-progr ammed curve. These
channels are labeled “abs” on instruments having a single factory calibration or
are labeled “1” and “2” on the uncalibrated single wavelength instruments. Any
chemistry that can be run at the instrument wavelength may be user-entered in
these channels.

Using prepared standard solutions that cover the range of interest, th e mete r
generates a calibration curve by calculatin g th e stra igh t-l in e segments between
each standard entered. A calibration curve may be entered using the keypad.
Factory-entered calibration curves may also be recalculated or adjusted using the
same procedure.

To enter the user-entered calibration mode, press the

MENU key and hold it down

until the display shows “USER” (about 5 seconds), followed by “CAL”. Press

ZERO/SCROLL to scroll through the options.

2—16

User-Entered Calibration, continued

• CAL—Used to enter and edit standard values and measure absorbance values,

or review the existing calibration.

• Edit—Used to enter and edit standard values and ab sorbance values with the

keypad or review the existing calibration. Used to enter a predetermined
calibration curve.

• dFL—Used to return the instrument back to the default factory calibration.

User-entered calibrations are stored upon exit from the calibration or
edit modes.

Note: To return to factory settings, following the instructions in Retrieving the Factory

Calibration on page 2—25.

If the instrument is shut off or loses power during data entry, all edits will be lost.
Automatic shut-off in user-entered cali br at io n entry mode is 60 minutes.

CAL and Edit Submenus

In CAL mode, standard values are entered and absorbance values are measured. In
Edit mode, standard and absorbance values are entered.

• To select CAL from the User menu, press READ/ENTER.

• To sel ect Edit from the User menu, press ZERO/SCROLL and READ/ENTER.

2—17

User-Entered Calibration, continued

• Once in the CAL or Edit optio n, press the READ/ENTER key to navigate through

each option.

Note: Press

ZERO/SCROLL

to quickly scroll through each option.

Calibration Procedure Using Prepared Standards

Note:

Deionized water or a reagent blank can be used to zero during the calibration procedure.
Calibrations generated with deionized water as the zero will give less accurate results if
the reagent blank is significantly more turbid or colored than deionized water. Use the
deionized water or the reagent blank as the zero concentration point (S0) in the following
calibration procedure.

1. Turn on the instrument and select the range to be calibrated. An arrow at the
top of the display will point to the selected range. To change ranges, press the

MENU key, then use the READ/ENTER ke y to to gg le bet w een range s 1 and 2.

Press

MENU again to return to measurement mode.

2. Follow the procedure for the chemical method to be calibrated . Prepare a
reagent blank (if needed) and a standard solution. Allow the color to
develop fully.

2—18

User-Entered Calibration, continued

3. Insert the reagent blank or deionized water into the meter and cover with the
cap. Press the

ZERO/SCROLL key . The meter will display “- - - -”, followed by

“0.000”. This initializes (zeroes) the meter.

4. Press the

MENU key and hold it down until the display shows “USER”, followed

by “CAL”. Press

READ/ENTER to enter the calibration mode.

5. In factory-calibrated meters, S0 will appear in the display.

Note: When recalibrating a factory-calibrated meter or range, RES (resolution) cannot

be changed.

6. In uncalibrated meters or meters with ranges labeled Abs, “RES” will appear.
Press

ZERO/SCROLL to review the current resolution (decimal placement). Press

ZERO/SCROLL again to accept the current resolution. To change the resolution,

press

READ/ENTER, then ZERO/SCROLL to change the resolution. Press

READ/ENTER to accept the new resolution. “S0” will appear on the display.

7. Press the

READ/ENTER key again, then enter the blank value.

Note: Press the

READ/ENTER

key to move from digit to digit. Use the

ZERO/SCROLL

key to

change the number.

8. After completing entry of the blank value, press the READ/ENTER key. The
display will show “A0”.

2—19

User-Entered Calibration, continued

9. Insert the reagent blank or deionized water into the cell holder. Cover the

blank with the instrument cap.

10. Press the

READ/ENTER key . The meter will measure and display the absorbance

value for “S0”.

11. Remove the sample blank. Press the

ZERO/SCROLL key . “S1” will appear. Press

the

READ/ENTER key, then enter the fir st standard value.

Note: Press the

READ/ENTER

key to move from digit to digit. Use the

ZERO/SCROLL

key to

change the number.

12. After completing entry of the first standard value, press the READ/ENTER key.

The display will show “A1”.

13. Insert the first reacted standard solution into the cell holder. Cover the

prepared standard with the instrument cap.

14. Press the

READ/ENTER key . The meter will measure and display the absorbance

value for S1.

15. The calibration is complete with two points. If additional standards are

required, press

ZERO/SCROLL until “Add” appears on the display. Repeat

steps 11–14 to enter additional standards.

2—20

User-Entered Calibration, continued

16. Press the MENU key twice to exit and accept the changes. The instrument will
use this calibration to determine the displayed concentration of future sample
measurements.

Entering a Predetermined Calibration Curve

Note: Entering a predetermined calibration curve requires at least two data pairs. Each data

pair requires a concentration value and the absorbance value for the given
concentration. Up to 10 data pairs may be entered. This procedure uses the
Edit mode.

1. Turn on the instrument and select the range to be calibrated. An arrow at the
top of the display will point to the selected range. To change ranges, press the

MENU key, then use the READ/ENTER key to to gg le bet ween range s 1 an d 2.

Press

MENU again to return to measurement mode.

2. Press the

MENU key and hold it down until the display shows “USER”, followed

by “CAL”. Press

ZERO/SCROLL to scroll to EDIT. Press READ/ENTER.

3. In uncalibrated meters or in Abs range, “RES” will appear. Press ZERO/SCROLL.
To change the resolution (decimal placement), press

READ/ENTER. Press

ZERO/SCROLL to select the new resolution, then press READ/ENTER to accept.

“S0” will appear on the display.

2—21

User-Entered Calibration, continued

4. Enter the concentration value and absorbance value of the first data pair

(S0, A0).

5. To enter the S0 value, press

READ/ENTER. Use the ZERO/SCROLL key to select

the numerical value, then press the

READ/ENTER key to accept the entry and

advance to the next decimal place. Repeat this sequence until the S0
concentration value is entered.

6. After editing the S0 value, press

READ/ENTER to accept. “A0” will appear on

the display.

7. To enter the absorbance value for S0, press the

READ/ENTER key to go to entry

mode. Use the

ZERO/SCROLL key to select th e numerical value, then press the

READ/ENTER key to accept the entry and advance to the next decimal place.

Repeat this sequence until the absorbance value for S0 is entered.

8. After enterin g A0, press

READ/ENTER to accept. “S1” will appear on the

display.

9. Repeat steps 5 through 8 for each standard value and absorbance value pair in

the calibration curve

Note: After A1 is entered, Add will appear in the display. If additional data pairs are to be

entered, press

READ/ENTER

and continue with step 9.

2—22

User-Entered Calibration, continued

10. When all the calibration data has been entered, press MENU twice to return to
the measurement mode.

Editing a User-entered or Factory Calibration Curve

1. Press the MENU key and hold it down until the display shows “USER”, followed
by “CAL”. Press

ZERO/SCROLL until EDIT appears.

2. Press the

READ/ENTER key to enter Edit mode. In factory-calibrated meters,

“S0” will appear in the display.

Note: When editing a factory-calibrated meter or range, RES (resolution) cannot be changed.
Note: When RES or S0 appears in the display, press

ZERO/SCROLL

to quickly scroll to the

data to be edited.

3. In uncalibrated meters or in Abs range, “RES” will appear . Press ZERO/SCROLL
to review the current resolution. Press

ZERO/SCROLL again to accept the

displayed resolution. To change the resolution (decimal placement), press

READ/ENTER. Press ZERO/SCROLL to select the new resolution, then press
READ/ENTER to accept. “S0” will appear on the di splay.

4. Press

READ/ENTER. The current concentration value for S0 will appear on the

display.

2—23

User-Entered Calibration, continued

5. To edit the S0 value, press READ/ENTER. Use the ZERO/SCROLL k ey to select the

numerical value, then press the

READ/ENTER key to accept the entry and

advance to the next decimal place. Repeat this sequence until the S0
concentration value is entered.

6. After editing the S0 value, press

READ/ENTER to accept. “A0” will appear on

the display.

7. To edit the absorbance value for S0, press th e

READ/ENTER key to go to entry

mode. Use the

ZERO/SCROLL key to select th e numerical value, then press the

READ/ENTER key to accept the entry and advance to the next decimal place.

Repeat this sequence until the absorbance value for S0 is entered.

8. After editing A0, press

READ/ENTER to accept. “S1” will appear on the display .

9. Repeat steps 4 through 8 for each standard value and absorbance value pair in

the calibration curve.

10. When all calibration data has been reviewed or edited, “ADD” will appear in

the display.

11. Press

READ/ENTER to add more calibration points, or press MENU twice to

return to the measurement mode.

2—24

User-Entered Calibration, continued

Note: When a factory calibration curve has been edited, the “calibration adjust” icon will

appear in the display.

Exiting the Calibration Routine

Exit the calibration routine by pressing th e MENU key to return to measurement
mode. The instrument uses the last completed user-entered calibration or the
factory calibration if no user-entered calibration has been completed.

Deleting Calibration Points

1. Select the range containing user-entered calibration points. See Switching

Ranges on page 2—4.

2. Press and hold the

MENU key until “USER”, then “CAL” appears. Press

READ/ENTER.

Note: Calibration points can also be deleted in Edit mode.

3. Press ZERO/SCROLL to select the point to delete (e.g., S0 or S1 or S2). Press

READ/ENTER.

4. The left digit will flash. Press

ZERO/SCROLL until “dEL” ap pea rs. (“dE L” wi ll

appear after the numeral 9.)

2—25

User-Entered Calibration, continued

5. Press READ/ENTER to delete. Repeat for all points to be deleted.

Note: The minimum number of valid points is two. For example, if five points have been

entered, three can be deleted using this feature.

6. Press MENU to return to the measurement mode.

Retrieving the Factory Calibration

1. Select the range to restore factory default calibration. See Switching Ranges

on page 2—4.

2. Press and hold the

MENU key until “USER”, then “CAL” appears.

3. Press the

ZERO/SCROLL key to find dFL.

4. Press the

READ/ENTER key to select dFL and restore the instrument to the

factory default calibration.

Note: For meters with factory-calibrated ranges or methods, Standard Calibration Adjust

(SCA) will be disabled when a user-entered method is programmed into the meter. To
turn SCA back on, restore the meter to factory default calibration.

2—26

User-Entered Calibration, continued
Maximum/Minimum Displayed Value

In meters with absorbance (Abs) ranges, the maximum displayed value and
minimum displayed value is rel ated to the value of the standa rds entered in a user
calibration.

Measurements that exceed the minimum or maximum standards entered in the
user calibration will return a flashing number indicating “underrange” or
“overrange”. See Error Codes (page 2—12) for more information.

Example 1

For a calibration with the following stan da rd s:
S0=0.000

S1=1.000

Maximum Displayed Value 1.000
Minimum Displayed Value 0.000

2—27

User-Entered Calibration, continued

Example 2

For a calibration with the following standa rds:
S0=1.00

S1=2.00
S2=4.00

For Hach-calibrated programs, the maxi mu m and min im u m di sp lay e d va lu es
always equal the factory-calibrated values and cannot be changed .

Maximum Displayed Value 4.00
Minimum Displayed Value 1.00

2—28

Certification

Hach Company certifies this instrument was tested thoroughly, inspected, and
found to meet its published specifications when it was shipped from the factory.

The Pocket Colorimeter™ II instrument has been tested and is certified as indicated
to the following instrumentation standards:

EMC Immunity:

Per 89/ 336/ EEC EMC: EN 6 1326: 1998 (Electrical Equipment for measurement,
control and laboratory use—EMC requirements). Supporting test records by
Hach Company, certified compliance by Hach Company.

Standard(s) include:

IEC 1000-4-2: 1995 (EN 61000-4-2: 1995) Electro-Static Discharge Immunity
(Criteria B)

IEC 1000- 4- 3: 1995 (EN 6 1000- 4- 3: 1996) Radi ated RF Elect ro- Magnet ic Field
Immunity (Criteria A)

Additional Immunity Standard(s) include:

ENV 50204: 1996 Radiated Elect rom ag net ic Field from Digital Telephones

2—29

Certification, continued

(Criteria A) Radio Frequency Emissions:

Per 89/ 336/ EEC EMC: EN 6 1326: 1998 (Electrical Equipment for measurement,
control and laboratory use—EMC requirements) “Class B” emission limits.
Supporting test records from Hach EMC Test Facility , certified compliance by Hach
Company.

Additional Radio Frequency Emissions Standard(s) include:

EN 55022 (CISPR 22), Class B emissions limits.
Canadian Interference-causing Equipment Regulation, IECS-003, Class A:

Supporting test records from Hach EMC Test Facility , certified compliance by Hach
Company.

This Class A digital apparatus meets all requirement s of the Canad ian
Interference-causing Equipment Regulations.

Cet appareil numérique de la classe A respecte toutes les exigences du Règlement
sur le matériel brouilleur du Canada.

FCC Part 15, Class “A” Limits: Supporting test records from Hach EMC Test
Facility, certified compliance by Hach Company.

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Certification, continued

This device complies with Part 15 of the FCC Rules. Operation is subject to the
following two conditions:

(1) This device may not cause harmful interference, and (2) This device must accept
any interference received, includin g interference that may cause undesired
operation. Changes or modifications to this unit not expressly approved by the
party responsible for compliance could void the user's authority to operate the
equipment.

This equipment has been tested and found to comply with the limits for a Class A
digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to
provide reasonable protection against harmful interference when the equipment is
operated in a commercial environment. This equipment generates, uses, and can
radiate radio frequency energy and, if not installed and used in accordance with
the instruction manual, may cause harmfu l interference to radio communications.
Operation of this equipment in a residential area is likely to cause harmful
interference, in which case the user will be required to correct the interference at
his own expense. The following techniques of reducing the interference problems
are applied easily.

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Certification, continued

1. Remove power from the Pocket Colorimeter instrument by removing one of its

batteries to verify that it is or is not the source of the interference.

2. Move the Pocket Colorimeter instrument away from the device receiving the

interference.

3. Reposition the receiving antenna for the device receiving the interference.

4. Try combinations of the above.

2—32

2—33

At Hach Company , customer service is an
important part of every product we make.

With that in mind, we have compiled the
following information for your convenience.

GENERAL INFORMATION

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2—35

How to Order

By Telephone: By Mail:

6:30 a.m. to 5:00 p.m. MST Hach Company
Monday through Friday P.O. Box 389
(800) 227-HACH (800-227-4224) Loveland, Colorado 80539-0389 U.S.A.

By FAX: For order information by E-mail:

[phone] (Hach Loveland) [e-mail]

Information Required:

• Hach account number (if available) • Purchase order number

• Billing address • Catalog number

• Shipping address • Brief description or model number

• Your name and phone number • Quantity

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How to Order, continued

Technical and Customer Service (USA only)

Hach Technical and Customer Service Department personnel are eager to answer
questions about our products and their use and to take your orders. Specialists in
analytical methods, they are happy to put their talents to work for you .
Call 1-800-227-4224 or E-mail [e-mail].

International Customers

Hach maintains a worldwide network of dealers and distributors. To locate the
representative nearest you, send E-mail to intl@hach. com or call (97 0) 669-3050.

In Canada

Hach Instrument Service Centre, Winnipeg, Manitoba, Canada
Telephone: [phone]
FAX: [phone]

2—37

Repair Service

Authorization must be obtained from Hach Comp an y before sending any items
for repair. Please contact the Hach Service Center serving your location.

In the United States: Canada:

Hach Company Hach Sales & Service Canada Ltd.
100 Dayton Avenue 1313 Border Street, Unit 34
Ames, Iowa 50010 Winnipeg, Manitoba R3H 0X4
[phone] (USA only) [phone] (Canada only)
FAX: [phone] Telephone: [phone]

FAX: [phone]
E-mail: [e-mail]

Latin America, Caribbean, Africa, Europe, the Middle East,
Far East, Indian Subcontinent: or Mediterranean Africa:

Hach Company World Headquarters HACH Company, c/o
P.O. Box 389 Dr. Bruno Lange GmbH & CO. KG
Loveland, Colorado 80539-0389 U.S.A. Willstätterstr. 11
Telephone: [phone] Düsseldorf, Germany
FAX: [phone] Telephone: [phone]
E-mail: intl@hach. com. FAX: [phone]

2—38

Warranty

Hach Company warrants this product to the original purchaser against any defects
that are due to faulty material or wo rkmanship for a period of two years from date
of shipment.

In the event that a defect is discovered during the warranty period, Hach Company
agrees that, at its option, it will repair or replace the defective product or refund the
purchase price, excluding original shipping and handling char ges. Any product
repaired or replaced under this warranty will be warranted only for the remainder
of the original product warranty period.

This warranty does not apply to consumable products such as chemical reagents;
or consumable components of a prod uct, such as, but not limited to, lamps
and tubing.

Contact Hach Company or your distribu tor to initi ate warranty sup port. Product s
may not be returned withou t aut horization from Hach Company.

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Warranty, continued

Limitations

This warranty does not cover:

• damage caused by acts of God, natu ral disaster, labor unrest, acts of war

(declared or undeclared), terrorism, civil strife or acts of any
governmental jurisdiction

• damage caused by misuse, neglect, acciden t or improper application

or installation

• damage caused by any repair or attemp ted repair not authorized by

Hach Company

• any product not used in accordance with the instructions furnished by

Hach Company

• freight charges to return merchandise to Hach Company

• freight charges on expedited or express shipment of warranted parts

or product

• travel fees associated with on-site warranty repair

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Warranty, continued

This warranty contains the sole express wa rran ty mad e by Hach Comp an y in
connection with its products. All implied warranties, including without limitation,
the warranties of merchantability and fitness for a particular purpose, are
expressly disclaimed.

Some states within the United States do not allow the disclaimer of implied
warranties and if this is true in your state the above limitation may not apply to
you. This warranty gives you specific rights, and you may also have other rights
that vary from state to state.

This warranty constitutes the final, complete, and exclusive statement of warranty
terms and no person is authorized to make any other warranties or representations
on behalf of Hach Company.

Limitation of Remedies

The remedies of repair , replacement or refu nd of purchase price as stated ab ove are
the exclusive remedies for the breach of this warranty. On the basis of strict
liability or under any other legal theory, in no event shall Hach Company be liable
for any incidental or consequential damages of any kind for breach of warranty or
negligence.