Jasco J-1100 User manual

P/N:0302-3800H April 2021
Model J-1100/1500
CD Spectrometer
Hardware/Function Manual

i
Safety Considerations
To ensure operation safety, this instrument must be operated correctly and maintained
according to a regular schedule. Read carefully to fully understand all safety precautions in this
manual before operating the instrument. To avoid injuries or health hazards, strictly follow the
safety precautions mentioned in this manual. Please take a moment to understand what the
signal words WARNING!, CAUTION, and Note mean in this manual.
(1) Safety symbols
Instruction manual symbol. If the product is marked with this symbol,
refer to the instrument manuals to protect the instrument against
damage.
WARNING! A WARNING! indicates a potentially hazardous situation which, if not
avoided, could result in serious injury or even death.
CAUTION A CAUTION indicates a potentially hazardous situation which, if not
avoided, may result in minor or moderate injury. It may also be used
to alert against damaging the equipment.
Do not proceed beyond a WARNING! or CAUTION notice until you
understand the hazardous conditions and have taken the appropriate
steps.
Note A Note provides additional information to help the operator achieve
optimal instrument performance.

ii
(2) Warning Label
Warning labels are attached at several locations on this instrument. Do not remove, deface or
damage the warning labels. If a warning label peels off the instrument or becomes illegible,
contact your local JASCO distributor and state the part number of the label you want to
replace.
Figure 1 Warning indications
1) Warning for Xenon Lamp (No.1 of Figure 2, Figure 3 and Figure4)
- The xenon lamp is made of quartz glass and is filled with high-pressure gas (5 to 10 atm.
pressure, about four times when the lamp is lit). Twisting, bending or impact can burst the
lamp, causing danger with glass fragments. Never open the lid of the light source unit if
the lamp is lit or hot.
- When handling the xenon lamp, wear protectiveclothing such as a thick, long-sleeved shirt,
a mask, thick gloves, etc.
- Before replacingthe xenon lamp,turn the lamp off and allow it to cool for about 30 minutes.
- When replacing the xenon lamp, be careful not to give an impact to the lamp. Never twist
the lamp by holding it at both ends.
- Do not mistake themounting direction (polarity) of the lamp. The cathodewill be damaged
if the lamp is mounted incorrectly, rendering the lamp inoperable.
- Do not touch the glass portion of the xenon lamp with bare skin.
- If the glass portion of the xenon lamp is contaminated, wipe it with clean gauze moistened
with alcohol.
- After removal and before disposal, place the xenon lamp in its case, and store the case in
a safe place. If the case is not available, carefully wrap the lamp in foamed plastic or other
protective wrapping, and store it in a same place.
2) Warning for Dangerous voltage (No.2 of Figure 2, Figure 3 and Figure4)
Dangerous voltage exposed when cover is removed.

iii
3) Warning for FUSE and GROUND (No.3 of Figure 2, Figure 3 and Figure4)
Only use fuses of the designated ratingto protect both operator and instrument from fire and
other hazards. Before replacing a fuse, be sure to turn OFF the "POWER" switch and
unplug the cable from the power outlet to avoid the risk of electric shock.
Be sure to ground the mains plug ground pin. If the instrument is operated without being
properly grounded, you run the risk of electric shock.
Do not use water supply pipes made of nonconductive material for grounding. For safety
reasons, do not use gas piping for grounding.
4) The crossed-out wheeled trash bin WEEE Label (No.3 of Figure 2, Figure
3 and Figure4)
This symbol [crossed-out wheeled trash bin WEEE] indicates separate collection of waste
electrical and electronic equipment in the EU countries.
Please do not throw the equipment into the domestic refuse.
Please usethe return and collectionsystems available in your country for the disposal of this
product.
1
2
3
Figure 2 Warning indications of Model J-1100 CD spectrometer

iv
1
2
3
Figure 3 Warning indications of Model J-1500 CD spectrometer (150 W light source)
1
2
3
Figure 4 Warning indications of Model J-1500 CD spectrometer (450 W light source)

v
(3) Warning for carrying
When carrying the instrument, hold firmly near the four legs (See Figure 5 or Figure 6).
There are two legs on the other side.
Figure 5 Carrying of Model J-1100 CD spectrometer
There are two legs on the other side.
Figure 6 Carrying of Model J-1500 CD spectrometer

vi
Connecting the power cable
WARNING!:The green/yellow ground core of the mains lead must be connected to
a ground that complies with the local electricity supply authority (or
equivalent body). The instrument is dangerous if not correctly
grounded.
240 Volt (nominal) Supply
Ground
Line
Neutral
Wire Color
Green/Yellow
Brown
Blue
115 Volt (nominal) Supply
Neutral
Wire Color
Green/Yellow
Black
White
Line
Ground
View of pin side of plug
Note: Instruments intended for operation at 115 V, 60 Hz are supplied with a mains
cable with a molded plug and socket.

vii
Preface
This instruction manual is your guide for using this instrument. It instructs first-time users on
how to use the instrument, and serves as a reference for experienced users.
Before using the instrument, please read this instruction manual carefully, and make sure that the
contents are fully understood. This manual should be easily accessible to the operator at all times
duringinstrumentoperation.Whennotusingtheinstrument,keepthismanualinasafeplace.Ifthis
instruction manual becomes lost, order a replacement from your local JASCO distributor.
Servicing
Contact your local JASCO distributor for instrument servicing. In addition, contact your JASCO
distributor before moving the instrument to another location. Consumable parts should be
ordered according to part number from your local JASCO distributor. If a part number is
unknown, give your JASCO distributor the model name and serial number of your instrument.
Do not return contaminated products or parts that may constitute a health hazard to
JASCO employees.

viii
Installation Requirements
To ensure operation safety, observe the following conditions:
(1) Do not operate the instrument under voltage fluctuations exceeding 10% of the
recommended line voltage. Otherwise, the instrument may not function properly.
(2) Frequency or spike noise in the power supply should be minimal.
(3) Ensure that the instrument is grounded.
(4) Operate the instrument in a temperature range of 15 to 30 °C.
Do not connect the instrument to the power source if any condensation is present.
Otherwise, it may become damaged or an electrical shock may be received. Let the
instrument dry naturally before connecting to the power source, especially when
unpacking or relocating.
(5) Operate the instrument in humidity below 85% (RH). JASCO recommends operating the
instrument in humidity below 60% to avoid the deterioration of the optical components
due to the condensation caused by high humidity.
(6) Operate the instrument in an atmospheric pressure range of 750 to 1060 hPa.
(7) Avoid strong magnetic fields and sources of high frequency. The instrument may not
function properly when near a strong magnetic field or high frequency source.
(8) Avoid vibration from vacuum pumps, electric motors, processing equipment and
machine tools.
(9) Avoid dust and corrosive gas. Do not install the instrument where it may be exposed to
dust, especially in locations exposed to outside air or ventilation outlets that discharge
dust particles.
(10) Do not install the instrument in a location where it may be exposed to direct sunlight.
(11) Install the instrument in a horizontal and stable position. (This includes a table or desk
upon which the instrument is installed.)
(12) Ensure that no air conditioner blows air directly onto the instrument. This may prevent
stable measurement.
(13) Install the instrument in alocation that ensures sufficient space around andbeneath it for
efficient air circulation and allows easy access for maintenance.
Note: The above conditions do not guarantee optimal performance of this
instrument.

ix
Notices
(1) JASCO shall not be held liable, either directly or indirectly, for any consequential damage
incurred as a result of product use.
(2) Prohibitions on the use of JASCO software
•Copying software for purposes other than backup
•Transfer or licensing of the right to use software to a third party
•Disclosure of confidential information regarding software
•Modification of software
•Use of software on multiple workstations, network terminals, or by other methods (not
applicable under a network licensing agreement concluded with JASCO)
(3) The contents of this manual are subject to change without notice for product
improvement.
(4) This manual is considered complete and accurate at publication.
(5) This manual does not guarantee the validity of any patent rights or other rights.
(6) If a JASCO software program hasfailed causing an error or improper operation, this may
be caused by a conflict from another program operating on the PC. In this case, take
corrective action by uninstalling the conflicting product(s).
(7) Windows is a registered trademark of Microsoft Corporation in the United States and other
countries. In general, company names and product names are trademarks or registered
trademarks of the respective companies. However, the TM and ®marks are not used in all
cases in this manual.
(8) When disposing of the instrument, parts, and waste solvents, takeappropriate measures
in compliance with applicable regulations regarding waste disposal, and correctly
dispose of them by yourself, or entrust disposal to a licensed industrial waste disposal
company. In any case, comply with the regulations in your country, state, region or
province to ensure they are disposed of legally and correctly.
(9) JASCO and the JASCO logo are registered trademarks of JASCO Corporation in Japan
and other countries.

x
Limited Warranty
Products sold by JASCO, unless otherwise specified, are warranted for a period of one year
from the date of shipment to be free of defects in materials and workmanship. If any defects in
the product are found during this warranty period, JASCO will repair or replace the defective
part(s) or product free of charge.
THIS WARRANTY DOES NOT APPLY TO DEFECTS RESULTING FROM THE
FOLLOWING:
(1) IMPROPER OR INADEQUATE INSTALLATION
(2) IMPROPER OR INADEQUATE OPERATION, MAINTENANCE, ADJUSTMENT OR
CALIBRATION
(3) UNAUTHORIZED MODIFICATION OR MISUSE
(4) USE OF CONSUMABLE PARTS NOT SUPPLIED BY AN AUTHORIZED JASCO
DISTRIBUTOR
(5) CORROSION DUE TO THE USE OF IMPROPER SOLVENTS, SAMPLES, OR DUE TO
SURROUNDING GASES
(6) ACCIDENTS BEYOND JASCO'S CONTROL, INCLUDING NATURAL DISASTERS
This warranty does not cover the consumable parts listed below:
(1) Tungsten lamp, and other light sources
(2) Mirrors in the light source section, and cell windows
(3) Fuses, batteries, glassware, chart paper and ink
THE WARRANTY FOR ALL PARTS SUPPLIED AND REPAIRS PROVIDED UNDER THIS
WARRANTY EXPIRES ON THE WARRANTY EXPIRATION DATE OF THE ORIGINAL
PRODUCT. FOR INQUIRIES CONCERNING REPAIR SERVICE, CONTACT YOUR JASCO
DISTRIBUTOR AFTER CONFIRMING THE MODEL NAME AND SERIAL NUMBER OF
YOUR INSTRUMENT.
JASCO Corporation
2967-5, Ishikawa-machi, Hachioji-shi
Tokyo 192-8537
JAPAN

xi
Contents
Safety Considerations............................................................................................... i
Connecting the power cable................................................................................... vi
Regulatory Statement............................................................................................. vii
Preface..................................................................................................................... vii
Servicing ................................................................................................................. vii
Installation Requirements..................................................................................... viii
Notices...................................................................................................................... ix
Limited Warranty ...................................................................................................... x
1. Overview and Specifications.............................................................................. 1
1.1 Overview ................................................................................................................... 1
1.1.1 Principles of CD operation................................................................................... 1
1.1.2 Principles of LD operation ................................................................................... 2
1.1.3 Optical system..................................................................................................... 3
1.1.4 Electrical system................................................................................................. 4
1.2 Specifications.......................................................................................................... 6
1.2.1 Model J-1100 CD Spectrometer Specifications ................................................... 6
1.2.2 Model J-1500 CD Spectrometer Specifications ................................................... 7
2. Unpacking and Installation................................................................................. 9
2.1 Unpacking ............................................................................................................... 9
2.2 Reassembly............................................................................................................11
2.2.1 Removing the cushion from the main unit...........................................................11
2.2.2 Installing the modulation element.......................................................................12
2.2.3 Installing the cell holder......................................................................................14
2.2.4 Installing the nitrogen purge case and the lid (only Model J-1500) .....................15
2.2.5 Installing the detector unit (only Model J-1500)..................................................16
2.2.6 Connecting the cables and tubes.......................................................................17
3. Names and Functions of Components ............................................................ 20
3.1 Model J-1100 ..........................................................................................................20
3.1.1 Overview............................................................................................................20
3.1.2 Rear panel .........................................................................................................21
3.1.3 Sample chamber................................................................................................22
3.2 Model J-1500 ..........................................................................................................23
3.2.1 Overview............................................................................................................23
3.2.2 Rear panel .........................................................................................................25
3.2.3 Sample chamber................................................................................................27
3.2.4 Detector unit.......................................................................................................28
4. Maintenance....................................................................................................... 29
4.1 Light Source Check and Replacement.................................................................29

xii
4.2 Wavelength Accuracy Check and Adjustment.....................................................32
4.3 CD Scale Check and Adjustment..........................................................................34
4.4 LD Scale Check and Adjustment ..........................................................................35
4.5 Replacement of Fuse.............................................................................................37
4.6 List of Consumable parts......................................................................................38
5. Troubleshooting ................................................................................................ 39

1
1. Overview and Specifications
1.1 Overview
1.1.1 Principles of CD operation
When linearly-polarized light passes through an optically-active substance, its two circularly
polarized components (i.e. the right and left circularly polarized beams of light) travel at
different speeds, and are absorbed in differing degrees by the substance. Thus, the light that
passes through the substance is elliptically polarized, and the substance is said to have
“Circular Dichroism (CD)”. The magnitude of circular dichroism is usually expressed in terms
of the molar ellipticity [], which is determined according to the following formula:
 
= −
4500 10( )log
L R e
(1-1)
where, Land Rare the molecular extinction coefficients for the right and left circularly
polarized beams of light. The difference () between Land Ris determined using the
following formula:








=−
L
R
RL I
I
LC 10
log
1

(1-2)
Substituting this expression into equation (1) gives:
 








=
L
R
eI
I
LC 10
log10log
4500


(1-3)
In equations (2) and (3), L represents the thickness (in cm) of the absorbing layer, C represents
the molar concentration, and IRand ILrepresent the intensities of the right and left circularly
polarized beams of light, respectively, after passing through the substance. Theoretically, the
molar ellipticity can be derived using equation (3). However, in practice, determining [] with a
high degree of accuracy is very difficult using equation (3), because the value of IR/ILis nearly
1. To avoid this difficulty, we substitute the following quantities.
( )
LRA III += 2
1
(1-4)
LR IIS −=
(1-5)
Since S/2 
Ais less than 1, equation (3) can be re-expressed as follows, by substituting the
expressions from equations (4) and (5):
 





















−
+
=
e
IS LC
I
S
I
S
LC
A
e
A
A
e
10
10
log10log
4500
2
1
2
1
log10log
4500



(1-6)

2
Thus, the ratio between IAand S can be approximated with a sufficiently high accuracy for
practical applications.
If EAand ESrepresent the output voltages of photomultiplier tube corresponding to light
intensities IAand S, respectively, then S/IA= ES/EA. By substituting this expression into
equation (6), it can be expressed as follows:
 








=e
E
E
LC A
S
e10
log10log
4500


. (1-7)
If EScan be amplified independently of EA, equation (7) can be expressed as follows.
 






















=Ge
EGE LC A
S
e10
log
10log
4500


, (1-8)
where G represents the amplification factor of ES. Since the value ESG can be brought very
close to the value of EAby choosing an appropriate value for G, [] can be determined with a
high degree of accuracy.
1.1.2 Principles of LD operation
LD (Linear Dichroism) is a phenomenon that the absorption of light differs depending on the
direction of polarization, which is observed with an oriented film and others. Given that I⊥is
the energy of vertically polarized transmitted light and I∥the energy of horizontally polarized
transmitted light, LD is defined by the following formula.
)/(log ||10|| IIODODLD ⊥⊥ =−
(2-1)
The light from the light source is monochromated and turned into linearly polarized light by the
double-prism monochromator that also functions as a polarizer. The linearly polarized light
from the monochromator is modulated into horizontal and vertical polarized lights by the
modulator. And the light that has transmitted the sample is converted into an electrical signal
by the photomultiplier tube. The component of (I⊥+ I∥)/2 is always maintained constant by the
photomultiplier cathode voltage. The component of (I⊥- I∥) is amplified and recorded. The
signal of (I⊥+ I∥)/2 corresponds to the DC component and that of (I⊥- I∥) corresponds to the
AC component at 100kHz. LD can be expressed by the following formula using AC and DC
signals.
LD AC DC
AC DC
=+
−
log ( / )
( / )
10 1 2
1 2
(2-2)
If AC<<DC, LD can be approximated by the following formula.
LD AC DC e
ap =( / )log10
(2-3)
The error will be 1% or more if LD is 0.2△OD or more. Here, LD can be corrected by the
following formula.
LD LD e
LD e
cor ap
ap
=+
−
log ( ) / (log )
( ) / (log )
1 2
1 2 10
10
(2-4)
ε(LD) is defined by the following formula.
 ( ) /LD LD cl=
(2-5)
where
c
: Concentration(mol/l)
l
: Cell length(cm)

3
E(LD) is defined by the following formula.
ELD LD cl( ) /=
(2-6)
where
c
: Concentration(mol/l)
l
: Cell length(cm)
These calculations can be performed using [processing]-[CD options]-[Optical Constant…] of
spectra analysis program.
The LD scale has been set at 0.133△OD (when two windows of the 45° quartz plates are
used) or 0.066△OD (when one window of the 45° quartz plate is used) at a wavelength of
500nm using a quartz plate tilted 45° with respect to incident light as sample.
1.1.3 Optical system
A schematic diagram of the optical system of the Model J-1100/1500 CD spectrometer is
shown in Figure 1.1.
M0
M1
LS1
LS2
M6
SH
S1
S2
S3
M2
M3
M4
M5
P1
F
P2
L
CDM
O-ray
E-ray
D
M0~ M6: Mirrors O-ray : Ordinary ray
LS1: Xenon lamp (for sample measurement) E-ray : Extraordinary ray
LS2: Mercury lamp (for the instrument inspection) L : Lens
SH : Shutter F : Filter
S1~ S3: Slits CDM : Modulator
P1: First prism (horizontal optical axis) D : PMT
P2: Second prism (vertical optical axis)
Note: In case of Model J-1100, there is not the M0mirror.
Figure 1.1 Schematic diagram of optical system
Light source for measuring the sample is a xenon lamp. The light emitted from the xenon lamp
is focused by the M1mirror onto the S1entrance slit. The optical system between the S1
entrance slit and the S2intermediate slit is referred to as the first monochromator, and the
optical system between the S2intermediate slit and the S3exit slit is referred to as the second
monochromator. Such an optical system, composed of two monochromators, is known as a
double monochromator. The ability of a double monochromator to reduce stray light makes it
indispensable for CD measurement.
The instrument uses crystal prisms (P1and P2) that have different axial orientations, so that the
light that passes through the monochromator is not only monochromated, but is also linearly
polarized in the horizontal direction.
This linearly-polarized light is modulated by the modulator into right and left circularly polarized
beams of light. The modulator subjects a quartz crystal to mechanical stress in order to
produce circular polarization in the quartz crystal, based on the principle of the Piezo effect.
When a sample with circular dichroism is placed in the sample chamber, the intensity, I, of the
transmitted light is modulated as shown in Figure 1.2.

4
Figure 1.2 Intensity of transmitted light
The relationship between the minimum and maximum intensities and the right and left
circularly polarized light depends on whether the value ERis smaller or larger than the value EL.
In Figure 1.2, the solid line represents the case when ERis greater than EL, and the dotted line
represents the case when ERis smaller than EL. For the definitions of IAand S, refer to Section
1.1.1 “Principles of CD operation”.
When light having a modulated intensity such as that shown in Figure 1.2 is incident on a
photomultiplier tube, the output signal consists of a DC component equivalent to IA, and an AC
component equivalent to S.
1.1.4 Electrical system
The output signal from the detector (photomultiplier tube PMT) consists of an AC component
which is electrically modulated by the modulator and a DC component that represents the
average intensity of the transmitted light. The CD and LD value can be determined from the
ratio of the DC component to the AC component. This instrument varies the HT voltage in
order to maintain a constant DC component, and utilizes the AC component as the CD and LD
signal. Therefore, once the AC signal has been calibrated using a standard sample, the
correct CD and LD value can be determined.
Figure 1.3 and Figure 1.4 show the block diagrams of the electricalsystem. J-1100 can get the
signal from one detector and simultaneously measure CD/LD/Absorbance/HT voltage/DC
voltage (up to four). J-1500 can get the signal from two detectors (one is optional) and
simultaneously measure CD/LD /Absorbance/FDCD/FDLD/Fluorescence intensity/HT voltage
/DC voltage (up to four). Furthermore, J-1100/1500 can get the signal from the external device
and simultaneously measure the signal.
Signal from the detector is divided into the two circuits for AC signal and DC signal. DC signal
is used to control the HT voltage applied to the PMT. The other hand, Analog AC signal is
converted to digital signal after unwanted frequency band was cut in the filter block.
The instrument and the personal computer communicate through the USB interface. The
various signals are communicated to the personal computer through the USB interface.
I
R
I
L
I
A
S
Time
Intensity

5
Lock in
Main IF
PMT Unit
PMT
Pre Amp
Detector
Control
Memory Block
USB module
HT
PS
Detector 1
Filter Block
Detector 1
AD Converter
Digital Lock in
EX
AD Converter
PC
Figure 1.3 Block diagram of electrical system (Model J-1100)
Lock in
Main IF
PMT Unit
PMT
Pre Amp
Detector
Control
Detector Unit
（Option）
Memory Block
USB module
HT
PS
Detector 1
Filter Block
Detector 1
AD Converter
Digital Lock in
Detector 2
Filter Block
Detector 2
AD Converter
EX
AD Converter
PC
HT
PS
Figure 1.4 Block diagram of electrical system (Model J-1500)

6
1.2 Specifications
1.2.1 Model J-1100 CD Spectrometer Specifications
Light source : 150 W air-cooled Xenon lamp
Detector : Head-on photomultiplier tube PMT
Modulator : Photoelastic modulator
Measurement wavelength range : 180 to 600 nm
Wavelength accuracy : 0.2 nm from 180 to 250 nm
0.4 nm from 250 to 500 nm
0.8 nm from 500 to 600 nm
Wavelength repeatability : 0.05 nm from 180 to 500 nm
0.1 nm from 500 to 600 nm
Spectral bandwidth : 1 nm
Slit width : 1 to 4000 m
Digital Integration Time (D.I.T.) : 8 msec to 8 sec
Scanning mode : Continuous scan, Step scan, Auto response (D.I.T) scan
Scanning speed : up to 5000 nm/min
Photometric Mode : CD, LD, Transmittance, Absorbance, HT voltage,
DC voltage, External input (Temperature, PH, etc. are
available)
CD full scale : 8000 mdeg
CD resolution : 0.00001 mdeg
Wavelength resolution : 0.025 nm
Stray light : Not more than 0.0003% (at 200 nm)
RMS noise : 0.03 mdeg (at 200 nm, at 500 nm, D.I.T. 8 sec)
Baseline stability : 0.05 mdeg/hr
LD measurement : Full scale 1ΔOD
Resolution 0.000001ΔOD
UV measurement : Single beam measurement
Photometric range: 0 to 5 Abs
Photometric accuracy: 0.01 Abs
(0 to 1 Abs, checked using NIST SRM 930 filter)
External input terminal : Two channels (input range: -1 to 1 V DC)
Mercury lamp : Used for the instrument inspection
Shutter : Located the light source unit
Sample chamber : 105 mm wide 150 mm deep 110 mm high
Exists the water inlet/outlet ports
Nitrogen gas purging : Atmosphere in the light source unit, monochromator unit,
and sample chamber can be purged using dry nitrogen
gas.
2L/Min (more than 185nm)
Dimensions : 740 mm wide 545 mm deep 325 mm high
Weight : 70 kg
Power requirements : 100, 115, 200, 220, 230, 240 V, 50/60 Hz, 360 VA

7
1.2.2 Model J-1500 CD Spectrometer Specifications
Light source : 150 W air-cooled Xenon lamp or
450 W water-cooled Xenon lamp (factory-installed option)
Detector : Head-on photomultiplier tube PMT
Optional photomultiplier tube PMT
Optional InGaAs
Modulator : Photoelastic modulator
Movable wavelength range : 163 to 1600 nm
Measurement wavelength range : 163 to 950 nm
400 to 1250 nm (optional PMT detector)
800 to 1600 nm (optional InGaAs detector)
Wavelength accuracy : 0.1 nm from 163 to 250 nm
0.2 nm from 250 to 500 nm
0.5 nm from 500 to 800 nm
1.5 nm from 800 to 1200 nm
2.0 nm from 1200 to 1600 nm
Wavelength repeatability : 0.05 nm from 163 to 500 nm
0.1 nm from 500 to 800 nm
0.5 nm from 800 to 1600 nm
Spectral bandwidth: 0.01 to 16 nm
Slit width : 1 to 4000 m
Digital Integration Time (D.I.T.) : 0.1 msec to 30 sec.
Scanning mode : Continuous scan
Step scan
Auto response(D.I.T) scan
Scanning speed : up to 10000 nm/min
Photometric Mode : CD, LD, ORD, FDCD, FDLD, Transmittance, Absorbance,
FL intensity, Anisotropy, DFP, HT voltage, DC voltage,
External input (Temperature, PH, etc. are available)
CD full scale : 8000 mdeg
CD resolution : 0.00001 mdeg
Wavelength resolution : 0.025 nm
Stray light : Not more than 0.0003% (200 nm)
RMS noise : 0.004 mdeg (185 nm, 150 W light source)
0.003 mdeg (185 nm, 450 W light source)
0.007 mdeg (200 nm, 150/450 W light source)
0.007 mdeg (500 nm, 150/450 W light source)
(spectral bandwidth 1 nm, D.I.T. 8 sec)
Baseline stability : 0.02 mdeg/hr
LD measurement : Full scale 1ΔOD
Resolution 0.000001ΔOD
UV measurement : Single beam measurement
Photometric range: 0 to 5 Abs
Photometric accuracy: 0.01 Abs
(0 to 1 Abs, checked using NIST SRM 930 filter)
External input terminal : Two channels (input range: -1 to 1 V DC)