Cole Parmer 1200 Series User manual

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Cole Parmer
1200 SERIES
SPECTROPHOTOMETER
(new version)
USER’S MANUAL
Cole Parmer Instruments Company
625 East Bunker Court
Vernon Hills, IL 60061
800-232-4340

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Table of Contents
General Information………………………………………………………………………………… 3
Introduction………………………………………………………………............................................... 4
Working Principle…………………………………………………………………………………...... 4
Specifications........................…………………………………………………………………………… 5
Unpacking Instructions…………………………………………………………………………… 6
Installation…………………………………………………………………………………………………… 6
1200 and 1201 Spectrophotometer Operation Panel……………………... 7
Changing Curette Holders…………………………………………………………………….... 8
Basic Operation………………………………………………………………………………………... 10
Sample Preparation and Analysis………………………………………….….… 10
Concentration Mode…….……….……………………………………………….…… 11
Factor Mode…………………………..……….…………………………………………. 11
Output and DataProcessing……………………………………………………………….... 12
Printer………………………………………………………………………………………… 12
UNICO®Application Software…………………………………………….…….... 12
Maintenance………………………………………………………………………………………….…….. 13
Lamp Replacement…………………………………………………………….……… 13
Wavelength Calibration Check………….……………..…………………….……. 13
Absorbance Accuracy Check………………………………………….…………… 14
Stray Light Check…................................................................................................ 15
1200 and 1201 Parts List………………………………………………………………………... 16
Troubleshooting ……………………………………………………………………………………..… 17

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General Information
The spectrophotometer described in this manual is designed to be used by properly
trained personnel in a suitable equipped laboratory. For the correct and safe use of this
spectrophotometer it is essential that laboratory personnel follow generally accepted
safe procedures in addition to the safety precautions called for in this manual.
The inside of the power supply unit is a hazardous area and its cover should not be
removed under any circumstances. ANY Servicing must be done by an authorized
person.
Some of the chemicals you use in the spectrophotometer may be corrosive, flammable,
radioactive, toxic, and/or potentially infective. Care should be taken to follow the normal
laboratory procedures for handling chemicals and samples. Please carefully read the
Safety, Electrical, Warning, Performance and Radio Interference instructions below.
Safety
This spectrophotometer has been designed and tested in accordance with EN 61326-1:
1997 Safety Requirements for Electrical Equipment for Measurement, Control, and
Laboratory Use standard (EMC Requirements). The spectrophotometer has been tested
and supplied in a safe condition.
The safety statements in this manual comply with the requirements of the HEALTH AND
SAFETY AT WORK ACT, 1974.
Read the following before installing and using the instrument and its accessories.
Electrical
Before switching on the spectrophotometer, make sure it is set to the voltage of the
local power supply (see Installation section).
The main plug shall be inserted in a socket provided with a protective earth grounded
contact. The protective action must not be negated by the use of an extension cord
without a protective conductor.
Warning
Any interruption of the protective conductor inside or outside the spectrophotometer or
disconnection of the protective earth terminal is likely to make the spectrophotometer
dangerous. Intentional interruption is prohibited.Whenever it is likely that the protection
has been impaired, the spectrophotometer shall be made inoperative and be secured
against any unintended operation.
The protection is likely to be impaired if, for example, the spectrophotometer
•Shows visible damage
•Fails to perform the intended measurements
•Has been subjected to prolonged storage under unfavorable conditions

•Has been subjected to severe transport stresses
Performance
Carry out performance checks with particular reference to wavelength and absorbance
accuracy to ensure that the spectrophotometer is working within its specification,
especially when making measurements of an important nature. Performance checks are
detailed in this manual.
Radio Interference
For compliance with the EMC standards referred to in the EC Declaration of Conformity,
it is necessary that only shielded cables supplied by Cole Parmer are used when
connecting the instrument to computers and accessories.
Introduction
The newly redesigned Cole Parmer 1200/1201 Spectrophotometers are single beam,
general purpose instruments designed to meet the needs of the conventional laboratory.
Cole Parmer 1200/1201 is ideal for various applications, such as: Clinical Chemistry,
Biochemistry, Petrochemistry, Environmental Protection, Food and Beverage Labs,
Water and Waste Water Labs, and other fields of quality control.
Featuring a digital display of photometric result, easy operation, and wavelength range
of 325 nm~1000 nm, Cole Parmer 1200/1201 are ideal for measurements in the visible
wavelength region of the electromagnetic spectrum.
Working Principle
The spectrophotometer consists of five parts:
1) Light Source (Halogen Lamp) to supply the light;
2) A Monochromator to isolate the wavelength of interest and eliminate the unwanted
second order radiation;
3) A Sample Compartment to accommodate the sample solution;
4) A Detector to receive and convert the transmitted light to an electrical signal;
5) A Digital Display to show absorbance or transmittance. Figure-1 illustrates the
relationship between these parts.
100%T
0 A
4
Light Source Monochromator Sample Compartment Detector Digital Display
Figure-1 Block Diagram for the Spectrophotometer

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In the spectrophotometer, light from the Halogen Lamp is focused on the entrance slit of
the Monochromator where the collimating mirror directs the beam onto the grating. The
grating disperses the light beam to produce the spectrum, a portion of which is focused
on the exit slit of the Monochromator by a collimating mirror. From here the beam is
passed to a Sample Compartment through one of the filters, which helps to eliminate
unwanted second order radiation from the diffraction grating. Upon leaving the Sample
Compartment, the beam is passed to the silicon photodiode Detector and causes the
Detector to produce an electrical signal that is shown on the Digital Display window.
Specifications
Table-1 lists the specification for both 1200 and 1201.
Table-1 Specifications
Model 1200 Model 1201
Wavelength Range 325~1000 nm
Spectral Bandpass 5 nm
Wavelength Accuracy ± 2 nm
Wavelength Repeatability ± 1 nm
Stray Radiant Energy < 0.5%T at 340 and 400 nm
Photometric Range 0~125%T
0~2.0 Abs
0~1999C (0~1999 Factor)
Photometric Accuracy ± 1.0%T
Power Requirements 115/230 V ±10%, 60/50 Hz switchable
Sample Holder Single Test Tube/Cuvette 4-poisiton Cuvette Holder
Dimensions 415W x 320D x 175H (mm) (16-1/2 x13 x 6-3/4 inches)
Net Weight 6.5 kg (15 lbs)

Unpacking Instructions
Carefully unpack the contents and check the materials against the following packing list
to ensure that you have received everything in good condition.
Packing List
Refer to Table-2 for the Packing List.
Table-2 Packing List QuantityDescription Model 1200 Model 1201
Spectrophotometer 1 1
Dust Cover 1 1
10 mm Optical Square Cuvette 2 2
Test Tubes (1/2 inch) Box of 12 -
Cuvette Cap 1 -
V-type Tube Holder (8 to 25 mm) 1 (installed) -
10 mm Single Cuvette Holder 1 -
Black Block 1 1
4-position Cuvette Holder - 1 (installed)
Power Cord 1 1
User Manual 1 1
Installation
1. Place the instrument in a suitable location away from direct sunlight. In order to have
the best performance from your instrument, keep it as far as possible from any strong
magnetic or electrical fields or any electrical device that may generate high-frequency
fields. Set the unit up in an area that is free of dust, corrosive gases and strong
vibrations.
2. Remove any obstructions or materials that could hinder the flow of air under and
around the instrument.
3. Select either 230V or 125V on the Voltage Selector Switch on the bottom of the
1200/1201 shown in Figure-2, to match your local main voltage supply.
4. Turn on your Cole Parmer 1200/1201 and allow it to warm up for 15 minutes before
taking any readings.
Voltage Selector Switch
Bottom of Model 1200/1201
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Figure-2 Bottom of Cole Parmer 1200/1201

1200 and 1201 Spectrophotometer Operation Panel
Mode Indicator: Show the current measurement mode (T--%Transmittance, A--
Absorbance, C--Concentration, and F--Factor) (refer to Figure-3).
LCD Display Mode 0A/100%T 0%T Print/Enter
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Sample compartment Wavelength Knob
Figure-3 Cole Parmer 1200 Spectrophotometer
MODE Button: There are four modes.
¾T mode is transmittance mode;
¾Amode is absorbance mode;
¾C mode is to measure unknown sample concentration through a standard solution;
¾Fmode is to measure unknown value with a previously determined factor.
∧(0A/100%T) Button: Adjust Digital Display reading to 100%T or 0.000A when blank
reference solution is in the Sample Compartment.
∨(0%T) Button: When in Tmode, put S-1200-111 into the Cuvette Holder to block the
optical light beam. Press ∨button to adjust the Digital Display reading to 00.0%T.
ENT (PRINT) Button: When pressed:
At Aand Tmodes, send the displayed results to printer;
At C mode, set the concentration value (refer to Concentration Mode in Basic
Operation section);

At Fmode, set the factor number and change to Cmode (refer to Factor Mode in Basic
Operation section);
If you want to print the test results at C mode, push the MODE button to the position
when the LED light is off, then push the ENT button;
If connected with a PC using UNICO®Windows-based Application Software, the
communication with the PC will be set up (refer to the UNICO®1200 Series
Spectrophotometer Software User’s Manual Version SS-1.22 for details).
Sample Compartment: Accept 10 mm test tube or 10 mm square cuvette (with
different cuvette holders). The compartment can accept up to 50 mm pathlength
cuvettes with optional holders.
WAVELENGTH (Wavelength Control) Knob: Select desired wavelength in nanometers
(nm).
Wavelength Readout Window: Display desired wavelength.
Changing Cuvette Holders
There are five different Cuvette Holders (Sample Holders) (refer to Figure-4 from left
to right):
•S-1200-101:Test Tube V-type Cuvette Holder with base for 8~25 mm Diameter
Test Tubes
•S-1200-102: Single Square Cuvette Holder with base for 10 mm Cuvettes
•S-1200-103: 4-poaition Cuvette Holder for 10 mm Square Cuvette
•S-1200-104: Longpath 4-position Cuvette Holder for up to 50 mm rectangular
Cuvettes
•S-1200-105: Water-jacketed Cuvette Holder with base and panel for
temperature controlled application
S-1200-101, S-1200-102, and S-1200-105 all consist of two parts: the upper holder and
the identical universal base (S-1200-106: Universal base for V-type holder, Single
Cuvette Holder and water-jacketed Holder). Follow the steps below to replace a 4-
position Cuvette Holder (Figure-5) with a V-type Tube Holder (Test Tube Holder).
The only tool needed is a standard Philips head screwdriver.
Figure-4 Sample Holders for Model 1200/1201
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Figure-5 4-position Cuvette Holder with Base
Step 1 Remove 4-position Cuvette Holder Rod. Unscrew the 4-position Cuvette
Holder Rod by turning the knob counterclockwise until it was removed from
the Holder. Gently slide the guide rod out of the Sample Compartment.
Step 2 Locate the Front Screw of the Holder Base. Open the cover of the Sample
Compartment, remove any cuvettes or any breakable items, push in the
Cuvette Holder Rod (black knob) all the way back (the first position is into
the light beam), and locate the Front Screw of the 4-position Cuvette
Holder shown in Figure-6.
Step 3 Remove Front Screw of the Holder Base. Look over the Sample
Compartment, remove the Front Screw.
Step 4 Remove Back Screw of the Holder Base. Place your hand ON TOP of the 4-
position Cuvette Holder and gently slide towards the front. The back screw
is then exposed and can be removed.
Step 5 Take out 4-position Cuvette Holder and insert V-type Tube Holder. Simply
take out the 4-position Cuvette Holder from the V-type Tube Holder and
insert the V-type Tube Holder into it.
Step 6 Install V-type Tube Holder. Locate the Front and Back Screws of the V-
type Tube Holder Base and fasten them.
Figure-6 Changing Cuvette Holders
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Basic Operation
Simple OPERATION INSTRUCTIONS are printed on the front panel of your Cole
Parmer 1200/1201. Three Basic Operations: Sample Preparation and Analysis,
Concentration Mode-C, and Factor Mode are shown in this section.
Sample Preparation and Analysis
A. Spectrophotometer Warm-up and 0%T Check
1. Turn on the spectrophotometer by turning on the Power Switch (IO). Allow 15
minutes for the instrument to warm up.
2. Even through the 0%T is pre-set, it may shift due to unexpected factors like
temperature change. To check 0%T, simply insert the Black Block (item
number: S-1200-111, used to check the 0%T) into the Cuvette Holder and close
the lid. Select Tmode, the display should be 00.0%T. If not, press the 0%T
button to set 0%T.
NOTE: If you lose the Black Block, you may use any opaque object to block the light
beam to the detector to carry out 0%T Check.
3. Select either the T(Transmittance Mode) or A(Absorbance Mode) by pressing
the MODE button until the red light for T or Ais on.
B. Sample Preparation
4. Select the desired wavelength by turning the WAVELENGTH control knob.
5. Make a blank reference solution by filling a clean square cuvette (or test tube)
half full with distilled/de-ionized water or other specified solvent. Wipe the cuvette
with tissue to remove the fingerprints or droplets of liquid.
6. Insert the blank cuvette into Sample Compartment and close the cover.
7. Set 0.000A or 100%T with the 0A/100%T (∧)button.
NOTE: This step fulfills the instruction on the front of the spectrophotometer (Set Full
Scale).
8. Remove the blank square cuvette or test tube. Set it aside in case that you may
need to adjust the 0A/100%T using ∧ button later (i.e. change the wavelength).
C. Sample Analysis
9. Rinse a second square cuvette with a small amount of the sample solution to be
tested. Fill the square cuvette half full and wipe it.
10. Put the sample cuvette in the Sample Compartment. Close the cover.
11. Read the Tor Afrom the Digital Display window. Remove the sample cuvette or
test tube.
12. If you are to test the same sample at other wavelengths, repeat step 4 to 10 for
each wavelength.
13. For each new sample you analyze, repeat step 3 to 11.

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Concentration Mode
Cis used for determining the concentration of unknown samples.
NOTE: This method should only be used when the relationship between Absorbance
and Concentration is known to be linear. The concentration of the Standard solution
used to calibrate the instrument should be higher than the most concentrated sample.
1. Select the desired wavelength by turning the wavelength control knob.
2. Using the MODE button, select Amode.
3. Insert the cuvette containing the blank solution.
4. Set 0.000A with the ∧button.
5. Using the MODE button, select Cmode.
6. Insert a cuvette containing a standard solution of known concentration in the Sample
Compartment and set the Digital Display window to be the value of the standard by
using the ∧and ∨buttons.
7. Press the ENT button.
NOTE: If the reading changes, the factor required is too high (i.e. >1999) to be
displayed. In this case, divide the concentration by 10; re-select the C mode by
successive presses on the MODE button, cycling through the F,T, and Amodes, and
follow step 2 above to set the concentration of the standard to the reduced value.
8. With the standard concentration set, determine the concentration values of samples
with unknown concentration by inserting the sample cuvette into the Sample
Compartment and reading the value direct from the Digital Display.
9. To read the value of the multiplier used to convert Abs to Concentration, after
measuring all the samples, change the mode to F and read the multiplier from the
display. Keep a record of this value for future use.
Operational Note: if the MODE is changed to read For Aand the Concentration C
reading is “frozen”, re-start at step 1.
Factor Mode
This is a special mode for measuring concentration values of unknown samples using a
previously determined factor to convert absorbance readings to concentration.
1. After setting the wavelength, and setting zero Abs on the blank solution, using
the MODE button, select Fmode.
2. Insert a cuvette containing a sample.
3. Using the ∧and ∨buttons, set the Digital Display window to the desired value
of the multiplier.
4. Press the ENT button. The spectrophotometer switches to the Cmode.
Operational Note: If the Concentration of the sample is too high to be displayed, the
instrument will not switch to Cmode when the ENT button is pressed. Dilute the sample
and multiply the concentration reading by the dilution factor to obtain the original sample

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concentration. If dilution is impossible or causes other problems, you may divide the
factor value by “10” or “100” and follow step 1 to 4 to enter the “new” factor value. You
need to calculate the sample concentration by multiplying readout with the multiple “10”
or “100”.
5. Read the concentration value of the sample direct from the display.
6. Insert a cuvette containing the next sample and read the result. Repeat until all
samples have been measured.
Operational Note: if the MODE is changed to read Aor Tand the Concentration C
reading is “frozen”, re-start at step 1.
Output and Data Processing
Printer
Model 1200/1201 Model has a RS232C Interface connector that can be connected to
any RS232 printers (Cole Parmer provides RS232 printer, item number: S-1100-206,
as an optional accessory). It requires a 9-pin, null modem connection cable. The RS232
Printer Setting should be as follows:
•Baud Rate: 9600 bps
•Parity: None
•Data Bits: 8
•Stop Bit: 1
UNICO®Application Software
The UNICO®Application Software--VIS1200 is Windows-based software designed to
operate with Cole Parmer Spectrophotometer Model 1200/1201. 1200/1201 uses its
RS232C Interface connector to connect with a PC. The software runs on a PC with
95/98/Me/NT/2000/XP operating system installed. The Software offers two additional
analytical methods: Standard Curve and Absorbance vs. Time Kinetics. It performs
the following methods for analysis:
•Absorbance/%Transmittance/Concentration: measure the Absorbance,
%Transmittance, Concentration/Standard, or Concentration/Factor at a single
wavelength within the range of 325~1000 nm
•Standard Curve: create a calibration curve (choice of 4 curve fits) with up to 8
standard solutions at a single wavelength to determine concentrations of
unknown samples
•Absorbance vs. Time Kinetics: measure a sample’s absorbance change over a
selected period of time, store the test results in data table, display the results
graphically, and calculate the reaction rate within a given time interval

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Refer to the 1200 Series Spectrophotometer Software User’s Manual Version SS-
1.22 for detail.
Maintenance
Lamp Replacement
1. Turn off and unplug the instrument.
2. Remove the lamp access door at the back of the instrument by removing the four set
screws.
3. Unplug the lamp from the white connector. Insert the new lamp; pushing it in as far
as it will go. Replacement lamp: Item Number: S-1200-505 (6V 10W G4 type)
CAUTION: DO NOT HANDLE THE LAMP WITH BARE FINGERS. USE TISSUE OR
CLOTH WHEN HANDLING LAMP.
4. Turn on the instrument. Set the wavelength at 340 nm, insert a test tube or an empty
cuvette with cuvette holder, and blank the instrument. If the energy is low, adjust the
lamp by “pulling” or “pushing” it so that the light beam is focused on the entrance slit
of the monochromator. Since the lamp socket is pre-aligned, there will be minimum,
if any, adjustment required.
5. Re-install the lamp access door.
Wavelength Calibration Check
Normally the Cole Parmer 1200 Series spectrophotometer retains its wavelength
calibration indefinitely. However if the instrument receives a severe shock or is abused,
use the following methods to check wavelength calibration. Please note that this test
requires the Didymium filter, item number S-2100-116, or the Holmium Oxide filter, item
number S-2100-115.
In the filter method, the didymium filter has two distinct absorbance peaks at 529 nm
and 807 nm. The Holmium filter has a distinct peak at 361 nm. When the instrument is
calibrated properly you will find minimum Transmittance (maximum Absorbance) at the
range ± 2 nm from these peaks. Note that the specific Transmittance values are not
important as you are only looking for the wavelength where the minimum Transmittance
(maximum Absorbance) occurs.
Note: If you calibration filter has a certified peak/valley curve attached, please use the
peaks on the curve to verify the instrument.
Holmium Oxide Filter Method
1. Turn instrument on and allow it to warm up for 15 minutes.
2. Select the Amode.
3. Set the wavelength to 350 nm.
4. Make sure the Cuvette Adapter is empty and place it in the Sample Compartment.
Close the lid.
5. Set zero Absorbance by pressing the ∧button. Wait a few seconds when the display

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flashes. The reading should be 0.000A. If not, repeat step 5.
6. Remove the Cuvette Adapter and insert the Holmium filter into it. Place it in the
Sample Compartment again and close the lid.
7. Record the Absorbance reading on the Digital Display window.
8. Advance the wavelength setting by 1 nm and repeat step 4 to 7.
9. Repeat step 8 until the wavelength setting reaches 370 nm.
10.Look for the maximum absorbance reading obtained, and this should be found within
359~363 nm. The wavelength accuracy of the 1200 is ± 2 nm.
Didymium Filter Method
1. Set the Wavelength to 800 nm.
2. Make sure the cuvette adapter is empty and place it in the Sample Compartment.
Close the lid.
3. Set zero Abs by pressing the ∧button. Wait a few seconds when the display flashes.
The reading should then be 0.000A. If not, repeat step 3.
4. Remove the cuvette adapter and insert the Didymium filter into it. Place it in the
Sample Compartment again and close the lid.
5. Record the Absorbance reading on the Digital Display window.
6. Advance the wavelength setting by 1nm and repeat step 2 to 5.
7. Repeat step 6 until the wavelength setting reaches 815 nm.
8. Look for the maximum absorbance reading obtained, and this should be found within
805~809 nm. The wavelength accuracy of the 1200 is ± 2 nm.
9. If a “middle” wavelength check is desired, set the wavelength to 522 nm (optional)
10.Make sure the Cuvette Adapter is empty and place it in the Sample Compartment.
Close the lid.
11.Set zero Abs by pressing the ∧button. Wait a few seconds when the display flashes.
The reading should be 0.000A. If not repeat step 11.
12.Remove the Cuvette Adapter and insert the Didymium filter into it. Place it in the
Sample Compartment and close the lid.
13.Record the absorbance reading on the Digital Display window.
14.Advance the wavelength setting by 1 nm and repeat step 10 to 13.
15.Repeat step 14 until the wavelength setting reaches 536 nm. Again, look for the
maximum absorbance reading. It should be within 527~531 nm.
Absorbance Accuracy Check
Specification: ± 1% at 1A
The absorbance accuracy should be checked against a set of neutral density filters
accurately calibrated to the NIST standards.
An alternative method using potassium dichromate is described below. Due to the many
factors that might affect the results (i.e. temperature, bandpass, weighing and diluting
errors), this method is less accurate and should only be used as a guide.
Reference: Johnson E A
Potassium Dichromate as an absorbance standard

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PSG Bulletin 1967, No. 17, page 505
1. Make up N/100 sulfuric acid as the solvent and use part of it to make a solution
containing 120 + 0.5 mg/l of potassium dichromate.
2. Wash out a square cuvette with solvent, and fill with solvent.
3. Put the cuvette in the Cuvette Adapter, then into the Sample Compartment and
close the lid.
4. Set the wavelength to 350 nm.
5. Set the MODE button to A.
6. Set the reading to 0.000A using the ∧button.
7. Empty the cuvette. Wash out with dichromate solution, and fill with dichromate
solution.
8. Put the cuvette in the Cuvette Adapter, then into the Sample Compartment and
close the lid.
9. Read the absorbance of the standard from the Digital Display window. The value
should be 1.288 ± 0.04 A. Refer to the notes above when interpreting the result.
Stray Light Check
Specification: Less than 0.5%T at 340 nm by ASTM E 387
A good indication as to whether the stray light level is within specification may be
obtained as follows:
1. Set the wavelength to 340 nm.
2. Set the MODE button to T.
3. With the square Cuvette Adapter in the Sample Compartment, but no cuvette,
close the lid and press the ∧button to set the display to 100.0%.
4. Remove the Cuvette Adapter from the Sample Compartment and close the lid.
Make a note of the reading that should be at or near 0.00.
5. Prepare a solution containing 50 mg/l of sodium nitrite (NaNO2) in distilled water
and fill a square cuvette with this solution.
6. Insert the cuvette into the Cuvette Adapter, place it in the Sample Compartment,
and close the lid. The display should read < 0.5%T. If the reading obtained in
step 4 is greater than 0.00, it should be subtracted from the displayed reading to
give the correct reading for the stray light value.
1200 and 1201 Parts List

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Table-3 1200 and 1201 Parts List
Item Number Description
Model 1200 (new) Spectrophotometer 5 nm Bandpass
Wavelength range: 325~1000 nm. Voltage preset at 110V
Complete with 10 mm single Square Cuvette Holder, V-type Holder for 5~10 mm round tube, a
pair of Glass Cuvettes, 12 pcs. of 10 mm Test Tubes
S-1200
RS-232C Port, Dust Cover, User Manual
S-1200-E Same as Model 1200 but preset at 220 V
Model 1201(new) Spectrophotometer 5 nm Bandpass
Wavelength range: 325~1000 nm. Voltage preset at 110V
Complete with 4-poaition Cuvette Holder for 10 mm Square Cuvettes, a pair of Glass Cuvettes
S-1201
RS-232C Port, Dust Cover, User Manual
S-1201-E Same as Model 1201 but preset at 220 V
Software
S-1200-401 UNICO®Application Software for PC's, Window's 95®/98®or above Required. Programs include
Standard Curve, Abs./%T/Conc., and Abs.vs.Time. Includes S-2100-226 cable
Accessories
S-1200-101 Test Tube V-type Cuvette Holder with base for 8~25 mm diameter Test Tubes
S-1200-102 Single Square Cuvette Holder with base for 10 mm Cuvettes
S-1200-103 4-position Cuvette Holder for 10 mm Square Cuvette
S-1200-104 Longpath 4-position Cuvette Holder for up to 50 mm rectangular Cuvettes
S-1200P-105 Water-jacketed Cuvette Holder with base and panel for temperature controlled application
S-1200-106 Universal base for V-type holder, Single Cuvette Holder and water-jacketed Holder
S-1200-111 Black Block to set 0%T
S-2100-115 Holmium Oxide Filter 10 mm x 10 mm x 45 mm
S-2100-116 Didymium Filter 10 mm x 10 mm x 45 mm
Output Devices
S-1100-206 Printer (requires S-1100-207 cable)
S-1100-207 Printer Cable (male 25 pin to female/female, Null Modem)
S-2100-226 RS-232C cable (9-pin to 9 pin, female/Female, Null Modem)
Glassware
S-90-301 Test Tube Cuvettes, 10 mm diameter, 12 pcs.
S-90-302P-100 Disposable Cuvette, Polystyrene, 10 mm pathlength, 100 pcs.
S-90-302P-500 Disposable Cuvette, Polystyrene, 10 mm pathlength, 500 pcs.
S-90-304G Square Cuvettes, Optical Glass, Set of 2
S-90-305P Disposable semi-micro Cuvette, Polystyrene, 10 mm pathlength, 500 pcs.
Misc. and Replacement Items
S-1100-101 Experiment manual includes safety in the lab, instructor guide
S-1100-505 Tungsten-Halogen Lamps (6V 10W G4 type)
S-1100-508 Printer Paper, Package of 3
S-1200-511 User Manual
S-1200-512 Dust Cover
S-1200-513 Fuse, 3A, quantity 1 (size5 x 20)
S-1200-520 Service Manual

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Troubleshooting
Table-4 Troubleshooting
PROBLEM Possible Cause Solution
Power cord not connected to outlet Plug instrument in
Dead Power outlet
Wrong voltage setting Change to a different outlet
Instrument
Inoperative
(Power indicator
has no light) Internal fuse blown or defective electronic
component Call an authorized service engineer
No Cuvette Adapter in the Sample
Compartment
Cuvette Adapter must be in
Sample Compartment to open
sample holder shutter
Light beam blocked:
•Holder misaligned
•Shutter
Check sample holder
Lamp is old or defective Replace lamp
Lamp is off alignment Refer to Lamp Replacement
instructions in this manual
Instrument can
not set 100%T
(0.000A)
Defective electronic component Call an authorized service
engineer
Sample holder Remove Cuvette Adapter or
test tube
Sample holder shutter May be stuck open Close
shutter
%T can not be
set to 00.0%T
Defective electronic component Call an authorized service
engineer
Bubbles or particles in solution Check sample preparation and
analytical procedure
Incorrect
Transmittance to
Absorbance
correlation Defective electronic component Call an authorized service
engineer
Concentration reading “frozen” Change MODE from C to F, T
or A and back to C Restart
measurement procedure
Wrong wavelength setting Check sample procedure and
wavelength setting
Insufficient sample volume Fill cuvette with more samples
Stray sample preparation vapors Prepare the sample away from
the instrument. Use proper
ventilation
Bubbles or particles in solution Check sample preparation and
analytical procedure
Digital Display
does not change
regardless of
sample
concentration
Defective electronic component or loose wiring Call an authorized service
engineer
Table-4 Troubleshooting
(continued)

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No sufficient warm up time
Significant temperature change
Lamp not adjusted properly
Check lamp has been properly
installed or has moved during
transit
Refer to Lamp Replacement
instructions in this manual
Lamp old or defective
Replace with a new lamp
Sample Holder Misaligned Refer to Lamp Replacement
instructions in this manual
Instrument drift
and noise
Unstable power supply
Defective or dirty detector or defective
electronic component
Call an authorized service
engineer
Insufficient sample volume Fill cuvette with more samples
Wrong wavelength setting
Failed to blank (0A/100%T)
Failed to set 0%T
Check analytical procedure
and wavelength setting Check
wavelength accuracy
according to procedure in this
manual
Stray sample preparation vapors Prepare sample away from
instrument. Use proper
ventilation
Bubbles or particles in solution Check sample preparation and
analytical procedure
Incorrect
readings
obtained
Instrument out of electronic calibration Call an authorized service
engineer