Shimadzu SPD-20A User manual

228-90095F
UV-VIS DETECTOR
FOR
SHIMADZU HIGH PERFORMANCE
LIQUID CHROMATOGRAPH
SPD-20A/20AV
SPD-20A UFLC
SERVICE MANUAL
CAUTION !
This service manual has been edited for those that have received service related
training.
Those that have not been trained, should not use this manual.
SHIMADZU
Analytical & Measuring Instruments Division

228-90095F
CONTENTS
Chapter 1 Introduction........................................................................................................................6
1.1 Introduction...........................................................................................................................................................................6
Chapter 2 Specifications......................................................................................................................7
Chapter 3 Measurement systems....................................................................................................7
3.1 Optical system......................................................................................................................................................................7
3.1.1 SPD-20AV Light path schematic............................................................................................................................9
3.1.2 SPD-20A Light path schematic............................................................................................................................10
3.2 Electrical system...............................................................................................................................................................11
3.2.1 Signal processing circuits.........................................................................................................................................11
3.2.2 Lamp power supply circuits ...................................................................................................................................12
Chapter 4 Parts configuration and function...............................................................................13
4.1 Front side of instrument................................................................................................................................................13
4.2 Operation controls............................................................................................................................................................13
4.3 Inside the front cover, and its top and left sides....................................................................................................13
4.4 Right and bottom sides ..................................................................................................................................................13
4.5 Back side..............................................................................................................................................................................13
4.6 Inside the instrument.....................................................................................................................................................13
4.7 Inside the optical unit .....................................................................................................................................................14
4.7.1 Illustration of optical unit interior.........................................................................................................................14
4.7.2 List of primary internal parts for optical unit ..................................................................................................14
4.8 Temperature-controlled flow cell drawing and component parts list..........................................................15
4.8.1 Assembly drawing for temperature-controlled flow cell..............................................................................15
4.8.2 Component parts list for temperature-controlled flow cell assembly.....................................................16
Chapter 5 Other functions...............................................................................................................17
5.1 List of auxiliary functions..............................................................................................................................................17
5.1.1 Parameter group.........................................................................................................................................................17
5.2 List of VP functions..........................................................................................................................................................18
5.3 List of factory functions ..................................................................................................................................................20
Chapter 6 Maintenance and adjustments..................................................................................22

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6.1 Cleaning the temperature-controlled flow cell......................................................................................................22
6.1.1 Simplified cleaning of temperature-controlled cell.........................................................................................22
6.1.2 Disassembled cleaning of flow cell........................................................................................................................22
6.1.3 Assembling the flow cell...........................................................................................................................................22
6.1.4 Cleaning the quartz window..................................................................................................................................22
6.3 Adjusting the optical system........................................................................................................................................24
6.3.1 Adjustment overview................................................................................................................................................24
6.3.2 Preparations .................................................................................................................................................................24
6.3.3 Optical adjustment jigs (targets)...........................................................................................................................25
6.3.4 Adjusting M1................................................................................................................................................................26
6.3.5 Adjusting slit position................................................................................................................................................27
6.3.6 Adjusting W lamp stopper screw .........................................................................................................................28
6.3.7 Adjusting M2................................................................................................................................................................29
6.3.8 Adjusting the grating ................................................................................................................................................30
6.3.9 Adjusting M3................................................................................................................................................................31
6.3.10 Fine adjustment of mirror M1 .........................................................................................................................32
6.3
.11 Checking the filter position................................................................................................................................32
6.3
.12 Adjusting the Hg lamp........................................................................................................................................34
Chapter 7 Additional explanations...............................................................................................36
7.1 Differences from previous models..............................................................................................................................36
7.1.1 WAVE ADJ / WAVE CHECK / WAVE CALIB functions.......................................................................36
7.1.2 Clearing lamp usage times.....................................................................................................................................36
7.1.3 Changing the gain of operation amplifier .........................................................................................................37
7.2 Additional VP functions.................................................................................................................................................40
7.2.1 Serial numbers ............................................................................................................................................................40
7.2.2 Usage time ....................................................................................................................................................................40
7.2.3 Log records ....................................................................................................................................................................40
7.2.4 Date and time ..............................................................................................................................................................40
7.2.5 Password........................................................................................................................................................................41
7.2.6 Absorbance compensation factor (ABS COMP).............................................................................................41
7.2.7 Automatic leak sensor correction (LEAK CALIB)........................................................................................41
7.2.8 Leak sensor threshold level (LEAK THR)........................................................................................................41
7.2.9 Compatibility of D2 lamps with previous models..........................................................................................42
7.2.10 Voltage at data recorder output terminal....................................................................................................42
7.2.11 How to update the ROM version....................................................................................................................43

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7.2.12 Changing the power supply input voltage ..................................................................................................44
7.2.13 The cautions at the time of linearity compensation [LINEAR CALIB] operation.................................45
Chapter 8 Troubleshooting..............................................................................................................46
8.1 Using symptoms to identify the problem................................................................................................................46
8.2 Using the error display to identify the problem....................................................................................................46
8.3 Problems with electrical circuits and points to check .........................................................................................47
8.3.1 SPD20-MAIN circuit board....................................................................................................................................47
8.3.2 SPD20-PWR(POWER) circuit board.................................................................................................................49
Chapter 9 Electrical circuits............................................................................................................50
9.1 PCB diagram, SPD-20 cables .....................................................................................................................................50
9.2 Circuit diagram, LC20-KEY .......................................................................................................................................51
9.3 Circuit diagram, SPD20-MAIN.................................................................................................................................52
9.3.1 Circuit diagram ,SPD20-MAIN 1/8 ....................................................................................................................52
9.3.2 Circuit diagram, SPD20-MAIN 2/8 ....................................................................................................................53
9.3.3 Circuit diagram, SPD20-MAIN 3/8 ....................................................................................................................54
9.3.4 Circuit diagram, SPD20-MAIN 4/8 ....................................................................................................................55
9.3.5 Circuit diagram, SPD20-MAIN 5/8 ....................................................................................................................56
9.3.6 Circuit diagram, SPD20-MAIN 6/8 ....................................................................................................................57
9.3.7 Circuit diagram, SPD20-MAIN 7/8 ....................................................................................................................58
9.3.8 Circuit diagram, SPD20-MAIN 8/8 ....................................................................................................................59
9.4 Circuit diagram, SPD- POWER................................................................................................................................60
9.4.1 Circuit diagram ,SPD20-PWR 1/5.......................................................................................................................60
9.4.2 Circuit diagram, SPD- POWER 2/5....................................................................................................................61
9.4.3 Circuit diagram, SPD- POWER 3/5....................................................................................................................62
9.4.4 Circuit diagram, SPD- POWER 4/5....................................................................................................................63
9.4.5 Circuit diagram, SPD- POWER 5/5....................................................................................................................64
9.5 Circuit diagram, PB-1 ASSY.......................................................................................................................................65
Chapter 10 Parts lists..........................................................................................................................66
10.1 Consumable parts list.....................................................................................................................................................66
10.2 Optical repair parts list ..................................................................................................................................................66
10.3 Temperature-controlled flow cell and plumbing parts list ...............................................................................66
10.4 Electrical parts list............................................................................................................................................................67

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Chapter 11 Optional parts.................................................................................................................68
11.1 Parts list and diagrams for optional parts..............................................................................................................68
11.1.1 Temperature-controlled semi-micro cell (228-45605-94).............................................................................68
11
.1.2 Inert cell (without temperature control) (228-33338-91)........................................................................68
11
.1. 3 Preparative cell (variable capacity, without temperature control).....................................................69
11.2 Parts list and diagram for solvent recycle valve ...................................................................................................70
【Amendment history】
D “5.3 List of factory functions SIGNAL MODE” was corrected.
“4.7.2 List of primary internal parts for optical unit List of primary internal
parts for optical unit” was corrected.
“9.2 Optical repair parts list”was corrected.
E Revisions to “4.8 Temperature-controlled flow cell assembly drawing and
component parts list”, “9 Parts List”, and “10 Optional parts”
F “6.3.10 Fine adjustment of mirror M1” was added to optical system adjustment
process, “6.3.3 Optical adjustment jigs (targets)” was added, the paper target copy was
discontinued, and “7.1.3 Changing the gain of operation amplifier” was added as
additional explanations. 7.2.13 Add Notes of Clause of Linearity Calibration.
6.3.12 Add the Method of Lighting of Hg Lamp by Clause of Adjustment of Hg Lamp.

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Chapter 1 Introduction
1.1 Introduction
This service manual applies to SPD-20A, SPD-20AV and SPD-20A UFLC
detectors. The difference between the construction of 20A and 20AV models is
the positioning of the tungsten (W) lamp, the W lamp power supply, and the
mercury (Hg) lamp used for wavelength calibration. The difference between the
-20A and -20A UFLC is the specification of the flow cell (-20A: standard cell,
-20A UFLC: semi-micro cell). The figures in this manual illustrate model 20AV,
but the explanatory text applies to both and having the instrument available to
look at should prevent any confusion. However, please note that parts with the
same name for all models may be differentiated using different part numbers.
This manual is intended to explain the maintenance of 20A (including -20A
UFLC) and 20AV model detectors to service personnel of the instruments. It
primarily describes general troubleshooting procedures for problems that could
occur during operation, in addition to maintenance and inspection procedures
that must be performed on a routine basis. The function of certain parts and
mechanisms are also explained for reference. When performing any work on the
detectors, use this manual in combination with the instruction manual for the
instrument. Please carefully observe the precautions for installation and
operation, and make sure the instrument is maintained appropriately and
effectively before using it.
CAUTION:
• This service manual includes only the table of contents entries and no
corresponding text for subjects addressed in the instruction manual. Please
use this manual in combination with the instruction manual.

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Chapter 2 Specifications
Please read a see instruction manual.
Chapter 3 Measurement systems
3.1 Optical system
Figure 3.1 illustrates the instrument’s optical system. It is equipped with a D2
lamp and W lamp (model 20AV) for the light source. The angle of mirror M1 is
used to choose between the two light sources. The angle of mirror M1 is switched
by the “LAMP” setting under the function key (operation controls). When the
mirror M1 position is switched, the lamp switching photomicrosensor detects the
angle of mirror M1, so only the selected light source stays on and the other lamp
turns off. In addition, if “LAMP” is set to “3”, then it is possible to select both
lamps. Model 20AV uses the D2 lamp for the UV region (190 -- 370 nm) and the
W lamp for the visible region (371 －900 nm). Model 20A uses only the D2 lamp
(190－700 nm).
When the angle of mirror M1 is in the position shown, the light from the D2 lamp
is reflected and focused through the quartz window and enters the slit. When the
angle position of mirror M1 is switched, the light from the W lamp passes
through a stray light cut-filter (short wavelengths) and heat-absorbing filter, then
in the same manner is reflected and focused by mirror M1 and passes through the
quartz window and enters the slit. A filter assembly (high order cut-filter or
blocking filter) is inserted in front of the slit, based on the wavelength setting.
The blocking filter is inserted to detect zero order light. The high order cut-filter
is inserted in front of the slit to filter higher order spectra in the specified
wavelength region corresponding to the wavelength setting. The filter is inserted
in front of the slit at the 371－700 nm range for model 20A and 701 nm -- 900 nm
for model 20AV. After the light beam passes through the slit, it is reflected and
focused by mirror M2 and hits a holographic grating of 1600 grooves per
millimeter, where it is separated into its spectrum. The light separated by the
grating emerges as parallel light beams that are reflected by mirror M3 and are
wide enough to straddle and enter both of the sample and reference cells. The
spectrum is generated in an orientation perpendicular to the line bisecting both
cells, so both cells receive identical light wavelengths. After passing through each

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cell, the respective light enters a silicon photodiodes (D1 and D2) where it is
converted to an electrical signal that is proportional to the light intensity.
The light entering the cells, or in other words, the wavelength being measured
during analysis, is selected by changing the angle of the grating. A stepping
motor is used to move the grating via a pulley and belt. When the instrument
power switch is turned on, mirror M1 moves to the angle position for the W lamp,
then again to the D2 lamp position. The lamp switching photomicrosensor detects
the position and the D2 lamp will turn on. When the mirror M1 position is
switched, the home position for the filter assembly is simultaneously detected.
Once the lamp goes on, the grating stepping motor first searches for the home
position of the wavelength setting, then verifies the wavelength using the D2
lamp and Hg lamp emission lines. This instrument measures the amount of light
passing through the cell as the wavelength is varied and automatically identifies
the wavelengths corresponding to the emission line spectrum peaks. If these
wavelengths are within one nanometer of the emission line wavelengths, then
“CHECK GOOD” will appear on the display. Then the grating rotates according
to the wavelength setting and the lamp position switches also. The sample cell
has a flow-through type structure. The reference cell is simply a hole that lets
light pass through. The Mercury lamp is used to check or calibrate wavelengths.
The characteristic emission line of Hg lamps at 253.7 nm is used as a reference
for checking accuracy in the ultraviolet region.

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3.1.1 SPD-20AV Light path schematic
SPD-20AV Light path schematic

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3.1.2 SPD-20A Light path schematic
SPD-20A Light path schematic

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3.2 Electrical system
The electrical system can be separated into four major sections, the signal
processing circuits, the light source power supply circuits, the drive circuits
(grating, filters and mirrors), and key board (operator controls).
3.2.1 Signal processing circuits
After passing through the measurement and reference cells, the respective light
beams (intensity) IMand IRenter silicon photodiodes D2 and D1. These
photodiodes generate an electrical current that is proportional to the quantity of
light. The currents K2IMand K1IRgenerated from D2 and D1 each flow
respectively through high resistances R2 and R1 and are converted to voltage by
A2 and A1. The respective outputs from A1 and A2 are converted to digital
signals by AD converters M22 and M23 and those values are converted by
logarithmic transformation in the CPU. The CPU processes the absorbance range,
zero adjustment and signal response from values entered via the operator
controls. The logarithmically transformed output voltages are reconverted to
analog voltage using a DA converters (M30 and M31) and a portion of that
voltage is sent via resistors to the AUX terminal as integrator output. Similarly,
resistors are also used to output 10 mV signals as data recorder output.
Schematic of signal processing circuits
(
Measurementside
)

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3.2.2 Lamp power supply circuits
The deuterium lamp (D2 lamp) is controlled via a fixed current circuit to provide
a stable light source that is not affected by power fluctuations. In addition, this
circuit has a fixed discharge current for automatically turning on the lamp. A
high voltage is applied and the filament is heated until the lamp is illuminated. If
the lamp does not turn on after several attempts, an “ERR D2 LAMP” message is
displayed. If the lamp turns on normally, “D2” will appear in the lower left part of
the initial display screen. The tungsten lamp (W lamp) is turned on and
stabilized via a fixed voltage supply. The display indicates when the W lamp is on
as well. Unlike models SPD-10AVvp and SPD-10AV, model SPD-20AV allows
both the D2 and W lamps to be illuminated simultaneously. (As noted above, the
position of mirror M1 switches according to the wavelength setting, so only the
light from one of the lamps will enter the cells. Furthermore, the cooling fans for
the lamp housings will turn on after the lamps have been on for thirty minutes.)
Lamp illumination circuit schematic
Highvoltage
triggercircuit
Transformerpowersupply
D2lam
p
Wlam
p
Fixed current
D2 circuit
Fixed voltage
W circuit
Fixed voltage
D2 heater circuit

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Chapter 4 Parts configuration and function
4.1 Front side of instrument
Please read a see instruction manual.
4.2 Operation controls
Please read a see instruction manual.
4.3 Inside the front cover, and its top and left sides
Please read a see instruction manual.
4.4 Right and bottom sides
Please read a see instruction manual.
4.5 Back side
Please read a see instruction manual.
4.6 Inside the instrument
Please read a see instruction manual.

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4.7 Inside the optical unit
4.7.1 Illustration of optical unit interior
Optical unit interior
4.7.2 List of primary internal parts for optical unit
List of primary internal parts for optical unit
No. Name P/N Remarks No. Name P/N Remarks
1 Grating ASSY 228-15257-95 11 Hg lamp ASSY 228-38214-96
2 M2 mirror ASSY 228-23014-91 12 Filter ASSY (VIS) 228-42066-91 For V only
3 M3 mirror ASSY 228-23041-93 13 W lamp 670-14602 For V only
4 Motor ASSY, VP 228-23027-92 14 Filter ASSY (UV)
FilterASSY (UV/VIS)
228-42008-91
228-42008-92
For A
For V
5 Slit ASSY 228-23021-91 15 PB-1 SPD20A ASSY 228-23691-95
6 Window 228-34795
Standard
temperature-cont
olled flow cell
ASSY
228-37440-94
7 D2 lamp 228-34016-02
16
Temperature-controll
ed semi-micro flow
cell ASSY
228-45605-94 For UFLC.
8 Stopper screw 228-15664-06 17 Silicon photocell
ASSY 228-23016-91
9 Stopper 228-25428
10 M1 Assy 228-23037-95

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4.8 Temperature-controlled flow cell drawing and component
parts list
4.8.1 Assembly drawing for temperature-controlled flow cell
(Standard: 228-37440-94, Semi-micro: 228-45605-94)
Reference: Procedure for tightening lens fixing screws (part 16) (factory method)
1) Verify that the lens surface fits completely inside the counterbore in the
housing. Do not use gaskets that are too warped. Doing so can raise the
lens and cause it to break during tightening.
2) Use a torque screwdriver to temporarily tighten screws to 0.4 Nm (4
kgf·cm).
3) Use a torque screwdriver to finish tightening screws to 0.8 Nm (8
kgf·cm).
4) Verify there is no lens breakage.
5) Retighten screws to 0.8 Nm (8 kgf·cm) eight hours later.

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4.8.2 Component parts list for temperature-controlled flow cell assembly
Ref.
No. Part Name Part Number Stan
dard
Semi-
micro Remarks
1 Semi micro cell housing 228-48646-01 1
1 Cell housing 228-41992-01 1
2 Cell holder 228-37442 1
2 Cell holder 228-41031 1
3 Cell plate 228-38465-02 1
3 Cell plate 228-41038 1
4 Inner cover, cell 228-37445 1
4 Inner cover, semi micro cell 228-37445-01 1
5 Outer cover, cell 228-37446 1 1
6 Cell fixing screw ASSY 228-38390-91 2 2
8 Inlet pipe ASSY (XP) 228-40347-91 1
8 Inlet pipe ASSY 1040 228-47522-94 1
9 Pipe, SUS316L D0.8 228-40348-02 1
9 Pipe ASSY, OUT L210 228-47524-92 1
10 Ferrule 0.8F 316L 228-40997-10 1 1
11 Male nut 0.8MN -M4 228-42605 1 1
12 Ferrule 0.8F 316L 228-40997-10 1 1
13 Male nut 0.8MN-M4 228-42605 1 1
14 Gasket 228-35097-01 2
14 Gasket 228-35097-05 2
15 Lens (R4, RD6) 228-14572 1 1
16 Lens fastener screw ASSY 228-40239-91 2 2
18 Optical Window 228-18058 1 1
19 Washer,SUS spring 2 M2.6 023-77026 2
20 Screw,SUS pan head M2.5X4 020-05121 2
20 Screw,SUS sems P2 M3X14 020-46131 2
21 Screw,SUS sems P4 M3X8 020-46635 1 2
22 Screw,SUS flat head M3X6 020-12104 1 1
23 Screw,SUS sems P4 M3X6 020-46634 3 3
24 Heater SPD-20 ASSY 228-40189-92 1 1
1. Transistor TR2SD2639E
2. Thermostat Active: 60 
Reset: 40 
3. Thermistor
R25=10kΩB25/85=4.128kΩ
25 Screw,PA pan head M3X8 020-03144 4 4
27 Male nut 0.8MN-PEEK 228-46363 1
29 Male nut 0.8MN-PEEK 228-46363 1
30 O-ring,1A P6 036-10204 2 2
34 Seat, thermally conductive 228-41049 1 1
36 Ground plate, cell 228-40503 1 1
37 TR bushing B-24 060-49746-16 1 1
50 Coupling 1.6-0.8C 316L 228-40998-10 1
51 Coupling 1.6-0.8C 316L 228-40998-10 1
52 Seal, Tape 228-50503
53 Seal, Sponge 228-50504

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Chapter 5 Other functions
5.1 List of auxiliary functions
This instrument includes the following auxiliary functions. Settings can be
changed in sequence by pressing the “Func” key for each function group.
5.1.1 Parameter group
No. Name Function Key(s)
1 LAMBDA Sets wavelength being measured Numeric keypad
2 RESPONSE Sets response speed Numeric keypad
3 LAMP Sets lamp on/off settings Numeric keypad
4 AUX RANGE Sets range of output to integrator Numeric keypad
5 RANGE Sets measurement range Numeric keypad
6 REC MODE Sets output mode to recorder Numeric keypad
7 BL OFS ITG Sets zero position of integrator Numeric keypad
8 BL OFS REC Sets zero position of recorder Numeric keypad
9 CELL TEMP Sets temperature of temperature-controlled flow cell Numeric keypad
10 EVENT Sets status of external event output terminal Numeric keypad
11 RT RNG Sets output range of ratio chromatogram Numeric keypad
12 RT THR Sets threshold value of ratio chromatogram Numeric keypad
13 SV LEVEL Sets threshold value for switching solvent recycle valve Numeric keypad
14 DELAY TIME Sets delay time for solvent recycle valve Numeric keypad
5.1.2 Control group
No. Name Function Key(s)
1 WAVE CHECK Checks wavelength precision Enter
2 W POWER Sets brightness of tungsten lamp.
10.0V at W POWER =0, plus 0.2 V per additional 1
Numeric keypad
3 SCAN FILE Sets file numbers for storing scan data Numeric keypad
4 SCAN BGN Sets starting wavelength of scan Numeric keypad
5 SCAN END Sets ending wavelength of scan Numeric keypad
6 SCAN STEP Sets wavelength scan interval size Numeric keypad
7 PLOT SPD Sets speed of sending spectral data output to data recorder Numeric keypad
8 SPC PLOT Outputs spectral data to data recorder Enter

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5.1.3 System group
No. Name Function Key(s)
1 LOCAL Sets whether to control from system controller or from local
unit
Numeric keypad
2 LINK ADRS Sets address when controlling from system controller Numeric keypad
3 KEY CLOSE Blocks input via keys Enter
4 BRIGHTNESS Adjusts contrast level of display Numeric keypad
5 EXT-S Used when the event terminal is used to start external
devices, etc.
Numeric keypad
6 MONIT-TIME Displays elapsed time during time program execution Numeric keypad
5.1.4 Monitor group
No. Name Function Key(s)
1 SMPL EN Displays sample light output level display only
2 REF EN Displays reference light output level display only
3 D2 TIME Displays deuterium lamp total usage time display only
4 W TIME Displays tungsten lamp total usage time display only
5 CELL TEMP Displays temperature monitor for temperature-controlled flow
cell
display only
5.2 List of VP functions
VP functions are listed below. Settings can be changed in sequence by pressing
the “Func” key for each function group.
5.2.1 Product information group
No. Name Function Key(s)
1 SERIAL NUMBER Displays serial number display only
2 Software ID Displays instrument name and ROM version display only
5.2.2 Maintenance information group
No. Name Function Key(s)
1 TOTAL OP TIME Displays total operating time of instrument display only
2 D2 LAMP USED Displays D2 (deuterium) lamp usage time and estimated
replacement time
display only
3 W LAMP USED Displays W (tungsten) lamp usage time and estimated
replacement time
display only
4 PART
REPLACEMENT
Used to enter part replacement record. Numeric keypad
5 MAINTENANCE
LOG
Displays maintenance log display only
6 OPERATION LOG Displays operation log display only
7 ERROR LOG Displays error log display only

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5.2.3 Validation Support group
No. Name Function Key(s)
1 DATE Displays or enters date tenkey
2 TIME Displays or enters current time tenkey
3 AUTO CHECK Checks memory, wavelength accuracy and light intensity Enter
4 LEAK SENSOR
TEST
Checks leak sensor Enter
5.2.4 Calibration Support group
No. Name Function Key(s)
1 INPUT
PASSWORD
Used to enter password. tenkey
2 WAVE CALIB Calibrates wavelength Enter
3 D2 TIME Used to enter D2 (deuterium) lamp replacement schedule. tenkey
4 D2 ENERGY Used to enter energy values for D2 (deuterium) lamp replacement
schedule.
tenkey
5 W TIME Used to enter W (tungsten) lamp replacement schedule. tenkey
6 W ENERGY Used to enter Energy values for W (tungsten) lamp replacement
schedule.
tenkey
7 ABS CALIB Correction applied to absorbance data Enter
8 ABS COMP Used to enter correction factor for absorbance. tenkey
9 LINEAR CALIB Linearity calibration 1:BG 2:4AU 3:deb*
* It is displayed at the time of FACTORY mode.
Linearity compensation will become effective if [3] is inputted even
if it does not return on a power supply switch.
4 (not displayed) :An input of [4] makes compensation of linearity
initial value.If a power supply switch is returned on, linearity
compensation will become effective as before.
3 and 4 are the commands for debugging.Fundamentally, please
do not use 3 and 4.
Enter
10 LEAK CALIB Automatic correction applied to leak sensor Enter
11 LEAK THR Used to enter leak sensor threshold level. tenkey
12 RNG DISP MODE Sets full scale display mode for absorbance tenkey
13 OP MODE Sets operating mode tenkey
14 INITIALIZE
PARAM
Initializes parameters Enter
15 CHANGE
PASSWORD
Changes password Enter
16 CBM
PARAMETER
Sets CBM (SCL) parameters Enter to Select
17 SERIAL NUMBER The serial number of CBM can be displayed.
It can set up on a back screen.
display only
18 SOFTWARE ID Displays CBM system type and ROM version display only
19 INTERFACE Sets CBM connection interface tenkey
20 ETHERNET
SPEED
Sets CBM Ethernet transmission rate tenkey
21 DHCP SERVER Can be set only when parameters sent using HDLC are enabled tenkey
22 IP ADRESS Can be set when parameters sent using HDLC are enabled and
DHCP server is not used
tenkey
23 SUBNET MASK (same as above) tenkey
24 DEFAULT
GATEWAY
(same as above) tenkey
25 TRS MODE RS-232C transfer mode tenkey

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0
5.3 List of factory functions
If this instrument is started up in “special mode” (power switch is turned on while
pressing the “Func” key), then the factory function group is added to the available
auxiliary functions. Factory functions are listed below.
* Functions indicated with an asterisk (*) will only display at the factory.
No. Name Function Key(s)
1 LAMBDA 1
LAMBDA 2 See parameter group tenkey
2 RESPONSE See parameter group tenkey
*3 LAMP
Sets lamp On/Off status 3 (henceforth) is not displayed.
0: all OFF 1: D2 ON 2: W ON 3: D2 + W ON
4: Hg ON 5: D2 + Hg ON 6: W + Hg ON 7: D2 + W + Hg
ON
tenkey
4 AUX RANGE See parameter group tenkey
5 RANGE See parameter group tenkey
6 SMPL EN
REF EN See monitor group display only
7 W POWER See control group tenkey
*8 ABS GM STEP
Moves GM step position (absolute) from HP sensor position by one
step
0: DEC 1: INC
tenkey
*9 Z WAVE Starts or cancels auto-zeroing function
0: Start 1: Disable3: Stops GM excitation tenkey
*10 FILTER POSI
Overrides FM position
0: No filter in optical path
4: Insert second-order light cut filter into optical path
7: Insert zero-order light cut filter into optical path
tenkey
*11 LAMP POSI Overrides LM position
0: Automatic insert 1: D2 position 2: W position tenkey
*12 SIGNAL MODE
Sets signal mode
0: With S/R log conversion 1: With S log conversion
2: With R log conversion
4: Without S/R log conversion 5: Without S log conversion
6: Without R log conversion
7: Simultaneously output S/R (without log) from ITG and REC
(For development)
tenkey
13 REC MODE See parameter group tenkey
*14 WAVE ADJ Calibrates wavelength Enter
15 WAVE CHECK Checks wavelength precision Enter
16 SV LEVEL See parameter group tenkey
17 EVENT See parameter group tenkey
18 LINK ADRS See system group tenkey
19 LOCAL See system group tenkey
*20 LAMP CUR Displays D2 lamp anode current value (mA)
Normal value: 300 ±30 display only
*21 D2 FIL CUR Displays D2 filament current value (mA)
Normal value: 700 ±100 display only
*22 D2 TRIG CT Displays D2 lamp trigger count display only
*23 W FIL CUR Displays W filament current value (mA)
Normal value: 1450 ±200 display only
24 CELL TEMP See monitor functions group display only
*25 RADIATOR T
Displays aluminum block temperature
Normal value: (ambient + 30C) x 10, where “ERR OVER HEAT”
displayed at 710C or above
display only
*26 LEAK SENSE Displays leak sensor liquid temperature
Normal value: (ambient + 30C) x 10 display only