LaMotte 1200 User Manual

12

0

0

COL ORIMETER

.................

Instruction

MANUAL

TABLE OF CONTENTS

GENERAL INFORMATION

PackagingandDelivery...............................4

General Precautions ................................4

Safety Precautions .................................4

Limits of Liability ..................................4

Specifications....................................5

Parts&Accessories.................................6

EPACompliance..................................7

CEStatement....................................7

CHEMICALTESTING........................8

WaterSamplingforChemicalAnalysis.....................8-9

Filtration ......................................9

AnIntroductionToColorimetricAnalysis..................10-11

Reagent Blank ...................................11

ColorimeterTubes.................................11

SampleDilutionTechniques&VolumetricMeasurement...........12

Interferences....................................13

StrayLightInterference..............................13

GENERALOPERATINGINFORMATION.............14

Overview....................................14-15

TheKeypadandDisplay .............................16

TestingTips....................................17

CALIBRATIONPROCEDURE..................18-19

ANALYSISPROCEDURE....................20-21

AVAILABLETESTKITS ......................22

TROUBLESHOOTINGGUIDE...................23

RS232PORT ...........................24

MAINTENANCE OF THE 1200 ..................25

ReplacingtheBattery...............................25

Repairs.......................................25

MeterDisposal...................................25

WARRANTY............................26

Limitations.....................................26

GENERAL INFORMATION

PACKAGING & DELIVERY

Experienced packaging personnel at LaMotte Company assure adequate
protection against normal hazards encountered in transportation of shipments.
After the product leaves the manufacturer, all responsibility for safe delivery is
assured by the transportation company. Damage claims must be filed immediately
with the transportation company to receive compensation for damaged goods.

Should it be necessary to return the instrument for repair or servicing, pack the
instrument carefully in a suitable container with adequate packing material. A
return authorization number must be obtained from LaMotte Company by
calling 1-800-344-3100 or faxing 1-410-778-6394. Attach a letter with the
authorization number to the shipping carton which describes the reason for the
return. This information will enable the service department to make the required
repairs more efficiently.

GENERAL PRECAUTIONS

Read the instruction manual before attempting to set up or operate this
instrument. Failure to do so could result in personal injury or damage to the
instrument.

The 1200 Colorimeter should not be stored or used in a
wet or corrosive environment. Care should be taken to
prevent water from wet colorimeter tubes from entering
the colorimeter light chamber.

NEVER PUT WET TUBES IN THE COLORIMETER.

SAFETY PRECAUTIONS

Read labels on all reagent containers. Some labels include precautionary notices
and first aid information. Certain reagents are considered hazardous and are
designated with a * in the instruction manual. To view or print a Material Safety
Data Sheet (MSDS) for these reagents see MSDS CD or our web site. To obtain a
printed copy, contact us by e-mail, phone or FAX. Additional information for all
LaMotte reagents is available in the United States, Canada, Puerto Rico, and the
US Virgin Islands from Chem-Tel by calling 1-800-255-3924. For other areas,
call 813-248-0585 collect to contact Chem-Tel’s International access number.
Each reagent can be identified by the four digit number listed on the upper left
corner of thereagent label, in the contents list and in the test procedures.

LIMITS OF LIABILITY

Under no circumstances shall LaMotte Company be liable for loss of life,
property, profits, or other damages incurred through the use or misuse of their
products.

4

SPECIFICATIONS

Instrument Type Single wavelength, direct reading colorimeter

Measurement Wavelengths: 420 nm, 460 nm, 510 nm, 530 nm, 570 nm or

605 nm

Readable Resolution: Determined by test factor

Photometric Precision: ±0.001 Absorbance Unit

Range: 0 - 2.00 absorbance units

Display: 3 ½ digits

Response Time: 2 seconds

Warm-up Time: Not required

Lamp: LED

Detector: Silicon Photodiode

Sample: 10 mL in capped tube

Sample Chamber: Accepts 25mm diameter flat-bottomed tubes

(capped)

Power Source: Battery Operation: 9 Volt Alkaline

Line Operation: 110V/60Hz, 220V/50Hz, with available adapter

Size (L X W X H): 8.5 x 16.2 x 6.7 cm, 3.4 X 6.4 X 2.6 inches

Shipping Weight: 11 oz (312 g) meter only

Serial Interface: RS232, 8 pin mDIN, 9600b, 8, 1, n

5

PARTS & ACCESSORIES

Included in the Model 1200 Colorimeter Kit :

1200 Colorimeter

Colorimeter tubes, set of 6

Water Sample Collecting Bottle

Reagent System

Optional Accessories

AC Adapter, 110V/60Hz Code 1726-110

AC Adapter, Universal Code 1754

Colorimeter Tubes, set of 6 Code 0290-6

6

EPA COMPLIANCE

CE

EUROPEAN

MARK

Application of Council Directives:

Standards to which Conformity Declared:

Manufacturer's Name:

Manufacturer's Address:

Importer's Name:

Importer's Address:

Type of Equipment:

Model Number:

Year of Manufacture:

89/336/EEC

EN55022, EN50082-1, En600950

802 Washington Avenue
PO Box 329
Chestertown, MD 21620

Reagecon Diagnostics Ltd

Water Quality Meters

2020/1200

1997

13 A/D Shannon Free Zone
Shannon, Co. Clase. Ireland

LaMotte Company

I, the undersigned, hereby declare that the equipment specified above

conforms to the above Directive and Standards.

Place

Chestertown, Maryland

Date

3-19-97

Signature

Name

James K. Trumbauer

Position

V.P., Director of Research & Development

DECLARATION OF CONFORMITY

NOTE: The device complies to the product specifications for the

Low Voltage Directive when furnished with the 220V AC Adapter (Code 1774).

The 1200 Chlorine Colorimeter is an EPA Accepted instrument.
EPA Accepted means that the instrument meets
requirements for colorimeters as found in test procedures
that are approved for the National Primary Drinking
Water Regulations (NPDWR) or National Pollutant
Discharge Elimination Systems (NPDES) compliance
monitoring programs. EPA Accepted instruments may be
used with approved test procedures without additional
approval.

CE COMPLIANCE

The 1200 Colorimeter has
been independently tested
and has earned the European
CE Mark of Compliance for
electromagnetic compatibility
and safety.

7

CHEMICAL TESTING

WATER SAMPLING FOR CHEMICAL ANALYSIS

Taking Representative Samples

The underlying factor to be considered for any type of water sampling is whether
or not the sample is truly representative of the source. To properly collect a
representative sample:

Sample as frequently as possible.

•

Collect a large sample or at least enough to conduct whatever tests are

•

necessary.
Makeacompositesampleforthesamesamplingarea.

•

Handle the sample in such a way as to prevent deterioration or contamination

•

before the analysis is performed.
Perform analysis for dissolved gases such as dissolved oxygen, carbon dioxide,

•

and hydrogen sulfide immediately at the site of sampling. These factors, as well
as samples for pH, cannot be stored for later examination.

Make a list of conditions or observations which may affect the sample. Other

•

considerations for taking representative samples are dependent upon the
source of the sample. Taking samples from surface waters involves different
considerations than taking samples from impounded and sub-surface waters.

SamplingofOpenWaterSystems

Surface waters, such as those found in streams and rivers, are usually well mixed.
The sample should be taken downstream from any tributary, industrial or sewage
pollution source. For comparison purposes samples may be taken upstream and at
the source of the pollution before mixing.

In ponds, lakes, and reservoirs with restricted flow, it is necessary to collect a
number of samples in a cross section of the body of water, and where possible
composite samples should be made to ensure representative samples.

To collect samples from surface waters, select a suitable plastic container with a
tight fitting screw cap. Rinse the container several times with the sample to be
tested, then immerse the container below the surface until it is filled to
overflowing and replace the cap. If the sample is not to be tested immediately,
pour a small part of the sample out and reseal. This will allow for any expansion.
Any condition which might affect the sample should be listed.

Sub-surface sampling is required to obtain a vertical profile of streams, lakes,
ponds, and reservoirs at specific depths. This type of sampling requires more
sophisticated sampling equipment.

8

For dissolved oxygen studies, or for tests requiring small sample sizes, a Water
Sample Bottle (LaMotte Code 1060) will serve as a subsurface or in-depth
sampler. This weighted device is lowered to the sampling depth and allowed to
rest at this depth for a few minutes. The water percolates into the sample
chamber displacing the air which bubbles to the surface. When the bubbles cease
to rise, the device has flushed itself approximately five times and it may be raised
to the surface for examination. The inner chamber of the sampling device is
lifted out and portions of the water sample are carefully dispensed for subsequent
chemical analysis.

A Snap-Plunger Water Sampler (LaMotte Code 1077) is another “in-depth”
sampling device which is designed to collect large samples which can be used for
a multitude of tests. Basically, this collection apparatus is a hollow cylinder with a
spring loaded plunger attached to each end. The device is cocked above the
surface of the water and lowered to the desired depth. A weighted messenger is
sent down the calibrated line to trip the closing mechanism and the plungers seal
the sample from mixing with intermediate layers as it is brought to the surface. A
special drain outlet is provided to draw off samples for chemical analysis.

Sampling of Closed System

To obtain representative samples from confined water systems, such as pipe lines,
tanks, vats, filters, water softeners, evaporators and condensers, different
considerations are required because of chemical changes which occur between
the inlet and outlet water. One must have a basic understanding of the type of
chemical changes which occur for the type of equipment used. Also,
consideration should be given to the rate of passage and retaining time for the
process water.

Temperature changes play an important part in deciding exactly what test should
be performed. Process water should be allowed to come to room temperature,
20–25°C, before conducting any tests.

When drawing off samples from an outlet pipe such as a tap, allow sample to run
for several minutes, rinsing the container several times before taking the final
sample. Avoid splashing and introduction of any contaminating material.

FILTRATION

When testing natural waters that contain significant turbidity due to suspended
solids and algae, filtration is an option. Reagent systems, whether EPA, Standard
Methods, LaMotte or any others, will generally only determine dissolved
constituents. Both EPA and Standard Methods suggest filtration through a 0.45
micron filter membrane, to remove turbidity, for the determination of dissolved
constituents.** To test for total constituents, organically bound and suspended or
colloidal materials, a rigorous high temperature acid digestion is necessary.

**LaMotte offers a filtering apparatus: Syringe Assembly (Code 1050) and
Membrane Filters, 0.45 micron (Code 1103).

9

AN INTRODUCTION TO
COLORIMETRIC ANALYSIS

Most test substances in water are colorless and undetectable to the human eye.
To test for their presence we must find a way to “see” them. The LaMotte
colorimeter can be used to measure any test substance that is itself colored or can
be reacted to produce a color. In fact a simple definition of colorimetry is “the
measurement of color” and a colorimetric method is “any technique used to
evaluate an unknown color in reference to known colors”. In a colorimetric
chemical test, the intensity of the color from the reaction must be proportional to
the concentration of the substance being tested. Some reactions have limitations
or variances inherent to them that may give misleading results. Many such
interferences are discussed with each particular test instruction. In the most basic
colorimetric method the reacted test sample is visually compared to a known
color standard. However, accurate and reproducible results are limited by the
eyesight of the analyst, inconsistencies in the light sources, and the fading of
color standards.

To avoid these sources of error, a colorimeter can be used to photoelectrically
measure the amount of colored light absorbed by a colored sample in reference to
a colorless sample (blank).

White light is made up of many different colors or wavelengths of light. A
colored sample typically absorbs only one color or one band of wavelengths from
the white light. Only a small difference would be measured between white light
before it passes through a colored sample versus after it passes through a colored
sample. The reason for this is that the one color absorbed by the sample is only a
small portion of the total amount of light passing through the sample. However,
if we could select only that one color or band of wavelengths of light to which
the test sample is most sensitive, we would see a large difference between the
light before it passes through the sample and after it passes through the sample.

A colorimeter passes a white light beam through an optical filter which transmits
only one particular color or band of wavelengths of light to the photodetector
where it is measured. The difference in the amount of colored light transmitted
by a colorless sample (blank) and the amount of colored light transmitted by a
colored sample is a measurement of the amount of colored light absorbed by the
sample. In most colorimetric tests the amount of colored light absorbed is directly
proportional to the concentration of the test factor producing the color and the
path length through the sample. However, for some tests the amount of colored
light absorbed is inversely proportional to the concentration.

The choice of the correct optical filter and therefore the correct color or
wavelength of light is important. It is interesting to note that the filter that gives
the most sensitive calibration for a test factor is the complementary color of the
test sample. For example, the Nitrate-Nitrogen test produces a pink color
proportional to the nitrate concentration in the sample (the greater the nitrate
concentration, the darker the pink color). A green filter is used since a
pinkish-red solution absorbs mostly green light.

10

The 1200 Colorimeter has been specially calibrated to read test results directly in
parts per million (ppm) of the test factor. The sensitivity of the response has been
maximized by using a specific, complementary light source for each test.

REAGENT BLANK

Some tests will provide greater accuracy if a reagent blank is determined, to
compensate for any color or turbidity resulting from the reagents themselves. A
reagent blank is performed by running the test procedure on 10 mL of
demineralized water. Use sample water to zero the meter. Insert the reagent blank
in the colorimeter chamber and select READ. Note result of reagent blank.

Perform the tests on the unknown as described. Subtract results of
reagent blank from all subsequent test results.

COLORIMETER TUBES

The handling of the colorimeter tubes is of utmost importance. Scratches,
fingerprints and water droplets on the tube or inside the light chamber can cause
stray light interference leading to inaccurate results. It is imperative that the
tubes and light chamber be clean and dry. The glassware must be clean and
defect-free. Scratches and abrasions will permanently affect the accuracy of the
readings. Tubes can be acid washed periodically. After a tube has been filled and
capped, it should be held by the cap and the outside surface should be wiped with
a clean, lint-free absorbent cloth until it is dry and smudge-free. Handling the
tube only by the cap will avoid problems from fingerprints. Always set the clean
tube aside on a clean surface that will not contaminate the tube.

Variability in the geometry and quality of the glassware is the predominate cause
of variability in results. Orientation of the tube in the chamber will greatly affect
the test results. To obtain the most accurate results, the tubes must be positioned
so that the index line on the tube is aligned with the arrow-shaped index mark t
molded into the housing in front of the light chamber. This will ensure that the
most accurate results are obtained.

11

SAMPLE DILUTION TECHNIQUES & VOLUMETRIC
MEASUREMENTS

If a test result using the 1200 Colorimeter gives an ER2 (over range) message, the
sample must be diluted. Then the test should be repeated to obtain a reading
which is in the concentration range for the test. (Note: This is not true for
colorimetric determination of pH.)

Example:

Measure 5 mL of the water sample into a graduated cylinder. Add demineralized
water until the cylinder is filled to the 10 mL line. The sample has been diluted
by one-half, and the dilution factor is therefore 2. Perform the test procedure,
then multiply the resulting concentration by 2 to obtain the test result.

The following table gives quick reference guidelines on dilutions of various
proportions. All dilutions are based on a 10 mL volume, so several dilutions will
require small volumes of the water sample. Graduated pipets should be used for
all dilutions.

Deionized Water to
Bring Volume to 10

Size of Sample

10 mL 0 mL 1

5mL 5mL 2

mL

Multiplication

Factor

2.5 mL 7.5 mL 4

1mL 9mL 10

0.5 mL 9.5 mL 20

If the above glassware is not available, dilutions can be made with the
colorimeter tube. Fill the colorimeter tube to the 10 mL line with the sample
then transfer it to another container. Add 10 mL volumes of demineralized water
to the container and mix. Transfer back 10 mL of the diluted sample to the
colorimeter tube and follow the test procedure. Continue diluting and testing
until a reading, which is in the concentration range for the test, is obtained. Be
sure to multiply the concentration found by the dilution factor (the number of
total 10 mL volumes used).

Example:

10 mL of sample is diluted with three 10 mL volumes of demineralized water; the
dilution factor is four.

12

INTERFERENCES

LaMotte reagent systems are designed to minimize most common interferences.
Each individual test discusses interferences unique to that test. Be aware of
possible interferences in the water being tested.

The reagent systems also contain buffers to adjust the water sample to the ideal
pH for the reaction. It is possible that the buffer capacity of the water sample may
exceed the buffer capacity of the reagent system and the ideal pH will not be
obtained. If this is suspected, measure the pH of a reacted distilled water reagent
blank using a pH meter. This is the ideal pH for the test. Measure the pH of a
reacted water sample using the pH meter. If the pH is significantly different from
the ideal value, the pH of the sample should be adjusted before testing.

Interferences due to high concentration of the substance being tested, can be
overcome by sample dilution (see page 12).

STRAY LIGHT INTERFERENCE

Stray light interference can be minimized by always zeroing the meter and
reading a sample with the lid closed. Turbidimetric determinations (i.e. sulfate)
are most likely to exhibit a stray light interference. Colorimetric tests are less
likely to have this problem unless the samples are turbid. If sample turbidity is
causing a stray light interference, filtration may be needed.

13

GENERAL OPERATING INFORMATION

OVERVIEW

The Model 1200 Colorimeter is a portable, microprocessor-controlled, direct
reading colorimeter. The microprocessor enables factory programmed
calibrations to optimally match non-linear curves. The auto zero feature
eliminates the need to dial in the zero manually. A sealed keypad controls the
operation. The large display presents measurements in ppm concentration and
indicates low battery warnings. The 1200 will turn off automatically after 5
minutes to prolong battery life. This will not affect the user calibration and the
meter will not have to be re-zeroed. The calibration and the last zero reading will
be stored in memory.

The 1200 is supplied with a 9 volt alkaline battery. An optional AC power
adapter is available.

A RS-232 serial port on the back of the meter allows an interface of the
colorimeter with a computer for real time data acquisition and data storage using
the PC. This port also allows an interface with a RS-232 serial printer.

14

READ

ZERO

Top

View

Bottom

View

2.55

Serial
Number

Battery
Compartment

I200

••••••••••••••••••

15

THE KEYPAD and DISPLAY

The button is used to turn the meter
ON and to take readings. Pressing the button
for 2 seconds will cause the meter to display
OFF. Releasing the button when OFF is
displayed turns the meter OFF.

The button is used
to zero the meter and for
calibration procedures.

The DOWN
ARROW will

the
numerical value
of the display.

The UP
ARROW will

the numerical
valueofthe
display.

See

TROUBLE

SHOOTING

GUIDE

page 23

The DISPLAY :

When the button is first pushed, a number will be briefly displayed that
indicates the software version number.

A walking dash ( ) will be displayed when reading is taking place.

(blank) will be displayed after the button has been pushed and held
for 2 seconds. If the button is released while is displayed, a zero or
blank reading will be taken.

(calibrate) will be displayed after the zero button has been pushed and held
for 5 seconds. If the button is released while is displayed, the
calibration mode will be entered as indicated by a flashing display.

will be displayed after the button has been held down for 2 seconds.
The meter will turn off when the button is released.

will be displayed when the battery voltage is very low.

will be displayed when concentration is over range.

will be displayed when the bulb has burned out.

will be displayed when the battery voltage is getting low. Readings are
reliable. Replace battery as soon as possible.

-

READ

ZERO

I200

••••••••••••••••••

L

Mott

DECREASE

READ

ZERO

INCREASE

READ

ZERO

ZERO

ZERO

READ

Bla

BLA

cal

CAL

OFF

Er1
Er2
Er3

BAT

16

TESTING TIPS

Samples should
be collected in a
clean glass or
polyethylene
container.

Observe the shelf-life

recommendations for reagents.

Samples should be
analyzed as soon as
possible after
collection.

5.

3.

1. 2.

4.

6.

Protect reagents
and components
from extreme heat
and cold.

Never put
wet tubes in
colorimeter.

Discard tubes
that are badly
scratched.

ONE

year

SHELF

LIFE

17

CALIBRATION PROCEDURE

Prepare standard
solutions to be
tested.

Insert the tube
into the
chamber, being
sure to align the
index line with
the arrow on
the meter.
Close the lid.
This tube is the
blankorzero.

Rinse and fill a
colorimeter tube
(0290) to the 10
mL line with
standard
solution. Cap
and wipe dry.

7. 8.

5.

3.

1. 2.

4.

6.

React a standard
that is in the range
of the reagent
system, and similar
to the expected
range of the sample.
Follow the
individual test
procedure.

Wipe the tube clean with a
lint-free cloth.

2.50 ppm

Push the
button to turn the
meter on. Press the

button
andholditfor2
seconds until
is displayed.
Release the button
to take a zero
reading (0 ppm).

Insert the
tube into the
chamber,
being sure to
align the
index line
with the
arrow on the
meter. Close
the lid.

Push the button. If the
displayed value is not the same as

thevalueofthe
reacted standard
(within the
specification
limits), continue
with the
calibration
procedure.

I200

••••••••••••••••••

ZERO

COLORIMETER

READ

2.55

I200

••••••••••••••••••

ZERO

COLORIMETER

READ

bla

READ

READ

ZERO

bla

The 1200 has been pre-calibrated. Recalibration of the 1200 by the user is not
required. However, a procedure to standardize the calibration (shown below)
should be performed to obtain the most accurate readings.

18

The 1200 can be calibrated with two prepared standards. The concentrations of

Push the
button again to
memorize the
calibration. The
1200 display will
stop flashing.
Calibration is
complete.

ZERO

Turn the unit off by
holding the
button down for at
least 2 seconds, or
proceed to measure
the test samples
following the
procedure on page

20.

READ

9. 10.

11 .

Push and hold the

button for 5
seconds until is
displayed. Release
the button. The
display will flash.
Adjust the display
with the and
buttons until the
value of the standard
is displayed.

ZERO

CAL

I200

••••••••••••••••••

ZERO

COLORIMETER

READ

“

“

“

“

2.55

I200

••••••••••••••••••

ZERO

COLORIMETER

READ

2.50

I200

••••••••••••••••••

ZERO

COLORIMETER

READ

the standards should be chosen from the low and high ends of the range of the
meter. The low standard must be less than 5% of over range. To calibrate the
meter with two standards, follow steps 1-11 of the calibration procedure for one
reacted sample. Repeat steps 1-11 of the calibration procedure with the second
reacted standard.

•

The calibration procedure should be followed as often as required by
regulations and laws for compliance monitoring.

•

To reset the calibration to the factory calibration: with the meter off, hold
down the t and push READ. The meter will turn on and the calibration

will be reset.

19

ANALYSIS PROCEDURE

Fill the Water
Sample Collecting
Bottle (0688) with
sample water. This
will be used to
dispense sample
water for the tests.

Push the
button to turn the
meter on. Press the

button and
hold it for 2 seconds
until is
displayed. Release
the button to take a
zero reading (0
ppm).

READ

ZERO

bla

Rinse and fill a
colorimeter tube
(0290) to the 10
mL line with
sample water.
Cap and wipe
dry.

7. 8.

5.

3.

1. 2.

4.

6.

React a sample
following the
individual test
procedure.

Wipe the tube clean with a
lint-free cloth.

Insert the tube
into the
chamber, being
sure to align the
index line with
the arrow on
the meter.
Close the lid.
This tube is the
blankorzero.

Insert the tube
into the
chamber, being
sure to align the
index line with
the arrow on
the meter.
Close the lid.

Push the
button. The

concentration in
ppm will be
displayed within
2 seconds.

READ

I200

••••••••••••••••••

ZERO

COLORIMETER

READ

2.55

I200

••••••••••••••••••

ZERO

COLORIMETER

READ

bla

20

9.

The 1200 will turn
off automatically 5
minutes after the
last button push. To
turn the meter off
manually, hold the

button for 2
seconds. Release the
button when is
displayed.

READ

OFF

If is displayed, the
concentration is over range.
The sample must be diluted
and re-tested. See page 12.

Er2

Note

I200

••••••••••••••••••

ZERO

COLORIMETER

READ

21

AVAILABLE TEST KITS

TEST
FACTOR

Ammonia
Nitrogen

ORDER
CODE/MODEL

3680-01
DC 1200-NH

Bromine 3672-01

DC 1200-BR

Chlorine
(Free &

3670-01
DC1200-CL

Total)

Chlorine
(Free &

3670-01-LI
DC1200-CL-LI

Total)

Chlorine
Dioxide

3671-01
DC1200-CLO

Copper 3673-01

DC1200-CO

Fluoride 3674-01

DC1200-FL

Iron 3681-01

DC1200-FE

RANGE

(PPM)

DETECTION
LIMIT

TEST METHOD

(# OF REAGENTS)

0-5.00 0.05 Nessler (2)

0-7.00 0.05 DPD Tablets (1)

0-4.00 0.05 DPD Tablets (2)

0-4.00 0.05 DPD Liquid (3)

0-7.00 0.05 DPD with Glycine

Solution (2)

0-8.00 0.03 Diethyldithio-

carbamate (1)

0-2.00 0.03 Aliizarin-Zirconyl

(2)

0-4.00 0.25 1-10

Phenanthroline (2)

Manganese 3682-01

0-0.90 0.01 PAN (3)

DC1200-MN

Molybdenum 3676-01

0-50.0 0.5 Thioglycolate (3)

DC1200-MO

Nitrate
Nitrogen

Ozone 3678-01

3677-01
DC1200-NA

0-3.00 0.05 Cadmium

0-0.40 0.04 Indigo Blue (3)

DC1200-OZ

Phosphate 3679-01

0-3.00 0.07 Ascorbic Acid (2)

DC1200-PLR

Sulfate 3683-01

0-100.0 1.0 Barium Chloride

DC1200-SU

Test kit includes 1200 meter and reagent system.

22

Reduction (2)

(1)

TROUBLESHOOTING

er1

er2

er3

PROBLEM CHECK ACTION

Meter won’t turn on Battery Replace

AC Adapter Plug in

AC Wall Outlet Verify power source

Contact LaMotte for
Return Authorization

Suspect Calibration Check calibration with

standards

Verify standard
concentration

Verify with another
meter

Check tube alignment Re-align tube

Check sample tubes for
dirt and scratches

Check to see if internal
meter components are
wet

Reset meter to factory
calibration

Contact LaMotte for
Return Authorization

Return to LaMotte for
repair

Use new standards

Runtestwithalternative
reagent system

Check other meter
calibrations

Check, clean and/or
replace if necessary

Always dry tubes before
inserting. Examine
chamber for visible
moisture.

With meter off, hold
down t and press READ

Return for calibration
check

Very low battery Change battery

Over range Dilute sample

Burnt out bulb Call LaMotte

BAT Low battery Change battery

23

RS232 PORT

The 1200 Colorimeter may be interfaced with any IBM compatible computer
using an Interface cable (Code 1772). The meter may also be interfaced with an
RS-232 serial printer, using an appropriate cable and setting the printer
configuration to the output below.

Output: RS232 compatible, asynchronous serial, 9600 baud, no parity, 8 data
bits, 1 stop bit.

Computer Connection: RS232 (Code 1772) interface connection, 8 pin
mini-DIN/9 pin F D-submin.

Pin out:

5 RS-232 TxD

3 RS-232 RxD

4, 6, 8 Digital ground

24

MAINTENANCE

REPLACING THE BATTERY

The LaMotte 1200 uses a standard 9-volt alkaline battery that is available
worldwide. The battery compartment is located on the bottom of the case. To
replace the battery:

1. Open the battery compartment lid.

2. Remove the battery and disconnect the battery from the polarized plug.

3. Carefully connect the new battery to the polarized plug and insert it into
the compartment.

4. Close the battery compartment lid.

REPAIRS

If it is necessary to return the instrument for repair, telephone LaMotte Company
at 1-800-344-3100 or fax [phone] for a return authorization number.

METER DISPOSAL

Waste Electrical and Electronic Equipment (WEEE)

Natural resources were used in the production of this equipment. This equipment
may contain materials that are hazardous to health and the environment. To
avoid harm to the environment and natural resources, the use of appropriate
take-back systems is recommended. The crossed out wheeled bin symbol on the
meter encourages you to use these systems when disposing of this equipment.

Take-back systems will allow the materials to be reused or recycled in a way that
will not harm the environment. For more information on approved collection,
reuse, and recycling systems contact your local or regional waste administration
or recycling service.

25

WARRANTY

This Instrument is guaranteed to be free from defects in material and workmanship for a
period of one (1) year from the original purchase date. In the event that a defect is found
during the warranty time frame, LaMotte Company agrees that it will be repaired or
replaced without charge except for the transportation costs. This guarantee does not cover
batteries.

This product can not be returned without a return authorization number from LaMotte
Company. For warranty support or a Return Authorization Number, contact LaMotte
Company at 1-800-344-3100 or [e-mail].

Limitations

This guarantee is void under the following circumstances:

Damage due to operator negligence, misuse, accident or improper application.

•

Damage or alterations from attempted repairs by an unauthorized

•

(non-LaMotte) service.
Damage due to improper power source, AC adapter or battery.

•

Damage caused by acts of God or natural disaster.

•

Damage occurred while in transit with a shipping carrier.

•

LaMotte Company will service and repair out-of-warranty products at a nominal
charge.

26