Unico SQ Series User manual

UNICOSQSeries
MODEL
UV-2800/UV-2802/UV-2802PC/UV-2802S/
UV-2802PCS/UV-3802/UV-4802
SPECTROPHOTOMETER
SERVICEMANUAL
UNICO
182 Ridge Road, Suite E Dayton, NJ 08810 USA
732-274-1155 Fax: [phone] WEB: www.unicosci.com E-mail: [e-mail]

C O N T E N T S
1. Introduction…………………………………………………… 1
2. Specifications………………………………………………… 3
3. Layout………………………………………………………… 4
3.1 Layout of UV-2800…………………………………………………… 4
3.2 Layout of UV-2802(S),UV-2802PC(S)……………………………… 9
3.3 Layout of UV-3802…………………………………………………… 15
3.4 Layout of UV-4802…………………………………………………… 20
4. Optical System………………………………………………… 25
4.1 Incidence of Light……………………………………………………… 25
4.2 Dispersion of Light…………………………………………………… 25
4.3 Exit of Light…………………………………………………………… 25
4.3.1 Exit of the Single Beam(UV-2800, UV-2802, UV-2802S)…………………… 25
4.3.2 Exit of the Split Beam(UV-3802)……………………………………………… 25
4.3.3 Exit of the Double Beam(UV-4802)…………………………………………… 25
5. Electronic System…………………………………………… 29
5.1 Power Supply System………………………………………………… 34
5.1.1 Power Supply PCB…………………………………………………………… 36
5.1.2 Power Distributing PCB………………………………………………………… 37
5.2 Control and Drive System…………………………………………… 38
5.2.1 Main CPU PCB………………………………………………………………… 41

5.2.2 Drive PCB……………………………………………………………………… 44
5.2.3 Transferring PCB……………………………………………………………… 46
5.3 Sampling and Signal Processing System…………………………… 48
5.3.1 Amplifier PCB………………………………………………………………… 48
5.3.2 Slave Amplifier PCB…………………………………………………………… 51
5.3.3 Slave CPU PCB……………………………………………………………… 53
6. Trouble Shooting……………………………………………… 56
6.1 Tungsten lamp off……………………………………………………… 56
6.2 Deuterium lamp off…………………………………………………… 57
6.3 Memory check failed………………………………………………… 58
6.4 Printer check failed…………………………………………………… 58
6.5 Filter positioning failed………………………………………………… 59
6.6 Light source positioning failed……………………………………… 60
6.7 Auto-cell positioning failed…………………………………………… 61
6.8 Slit positioning failed………………………………………………… 62
6.9 Search 656.1nm failed……………………………………………… 63
6.10 “Please restart” warning…………………………………………… 64
6.11 “Battery low” warning………………………………………………… 64
6.12 Save or load file failed……………………………………………… 64
6.13 Get dark current for a long time…………………………………… 65
6.14 No backlight on LCD Display……………………………………… 66
6.15 Backlight OK, but nothing display on LCD Display……………… 67

6.16 “Energy low” warning after blanking……………………………… 68
6.17 “Energy too low” warning…………………………………………… 69
6.18 No DC +12V on PCB SST8.412.113……………………………… 70
7. Maintenance…………………………………………………… 71
7.1 Working Environment………………………………………………… 71
7.2 Replace Tungsten Lamp……………………………………………… 71
7.3 Replace Deuterium Lamp…………………………………………… 75
7.4 Replace Memory Battery…………………………………………… 77
7.5 Upgrade Firmware…………………………………………………… 78
7.6 Check Performance…………………………………………………… 81
7.6.1 Prepare…………………………………………………………………………… 81
7.6.2 Check Wavelength Accuracy………………………………………………… 81
7.6.3 Check Stray Light……………………………………………………………… 82
7.6.4 Check Absorbance Accuracy………………………………………………… 82
7.6.5 Check Dark Current…………………………………………………………… 82
7.6.6 Check Energy Profile…………………………………………………………… 83
Appendix…………………………………………………………… 84
Order NO. List of UV-2800………………………………………………… 84
Order NO. List of UV-2802, UV-2802PC………………………………… 85
Order NO. List of UV-2802S, UV-2802PCS……………………………… 86
Order NO. List of UV-3802………………………………………………… 87
Order NO. List of UV-4802………………………………………………… 88

Introduction
- 1 -
1. Introduction
The SQ series Spectrophotometer are available in five models, the model
UV-2800, UV-2802, UV-2802S, UV-3802 and UV-4802. This series products cover
the Ultra Violet and Visible wavelength regions from 190nm to1100nm.
The analytical grating system has 1200 grooves/mm for high spectral
dispersion. The models UV-2800, UV-2802,UV-2802PC, UV-2802S and UV-2802PCS
are Single Beam, the model UV-3802 is Split Beam and the model UV-4802 is Double
Beam.
The SQ series Spectrophotometer used Double CPU, RTOS, High Precision
A/D and 320×240 dot matrix LCD Display(320X240). All of these made the instruments
have excellent performance and good stability.
Figure 1.1 Model UV-2800

Introduction
- 2 -
Figure 1.2 Model UV-2802, UV-2802S
Figure 1.3 Model UV-2802PC, UV-2802PCS
Figure 1.4 Model UV-3802

Introduction
- 3 -
Figure 1.5 Model UV-4802

Specifications
- 4 -
2. Specifications
UV-4802
Double beam, grating
system1200 lines/mm
24kg
UV-3802
Split beam, grating
system1200 lines/mm
1.8nm
LCD(320×240), DMF50174
≤0.1%T@220nm&340nm
23kg
UV-2802PCS
0.5, 1, 2, 4nm
22kg
UV-2802PC
1.8nm
PC Monitor
21kg
UV-2802S
0.5, 1, 2, 4nm
22kg
UV-2802
1.8nm
±0.5nm
0.3nm
620X400X280
21kg
UV-2800
Single beam, grating system1200 lines/mm
4nm
190-1100nm
±0.8nm
0.5nm
LCD(320×240), DMF50083
≤0.15%T@220nm&340nm
0-200%T, -0.3-3.0A, 0-9999C
±0.5%T
±0.002A/h@500nm
±0.004A
Tungsten lamp, Deuterium lamp
RS-232, Centronics Parallel Port
545X425X260
20kg
Optical System
Spectrum Bandwidth
Wavelength Range
Wavelength Accuracy
Wavelength Reatability
Display
Stray Light
Photometric Range
Photometric Accuracy
Stability
Baseline Straight
Light Source
Data Output
Dimensions
Weight

Layout
- 5 -
3. Layout
3.1 Layout of UV-2800
1. Cooling Fan 2. Concave Mirror
3. Tungsten Lamp(W Lamp) 4. Heat Radiator
5. D2/W Power Supply PCB 6. Motor1(Lamp Change)
7. Transformer 8. Mirror1(Lamp Change)
9. Lamp Limit Switch 10. Light Blocking Shelf
11. Deuterium Lamp(D2 lamp) 12. Entrance Slit
13. Monochromator 14. Monochromator Cover
15. Movable Nut 16. Screw Thread Pole
17. Sine Bar 18. Drive PCB
19. Motor2(Wavelength) 20. Synchro-Strap
21. Photo-couple1(Wavelength) 22. Pull-Push Rod
23. Shield Cover 24. Photo-couple2(Filter)
25. Motor3(Filter) 26. Amplifier PCB
27. Condenser Lens 28. 4-cell Sample Holder
29. Sample Compartment 30. Slave CPU PCB
31. Lamp Source Room 32. Auto-cell Changer Connector
33. Light Blocking Plate 34. Rectifier
35. Power Distributing PCB 36. Switch Power Supply
37. Main CPU PCB 38. Program Switch for Software Update
39. LCD Screen(320x240 dots) 40. Keypad
41. Sample Compartment Lid 42. Transferring PCB(In Upper Case)
43. Upper case 44. Viewing Plate
45. Viewing Hole 46. Contrast Potentiometer for LCD
47. 232 Serial Port Interface 48. Printer Interface
49. Power Switch 50. Power Socket with Fuse with Fuse
51. 110V/220V Selector

Layout
- 6 -
1 2 3 4 5 6 7 8 9
10 11 12 13
14
15
16 17 18
19
20 21
25
24
23 22
29
28
27 26
33
32
31 30
34
Figure 3.1 Layout of UV-2800 Inside Top View

Layout
- 7 -
Figure 3.2 Layout of UV-2800 Inside Bottom View

Layout
- 8 -
39 40 41
42
43
Figure 3. 3 Layout of UV-2800 Top View

Layout
- 9 -
230V
44
45
46
47
48
49
50
51
Figure 3. 4 Layout of UV-2800 Back View

Layout
- 10 -
3.2 Layout of UV-2802(S), UV-2802PC(S)
1. Cooling Fan 2. Concave Mirror
3. Tungsten Lamp(W Lamp) 4. Heat Radiator
5. D2/W Power Supply PCB 6. Motor1(Lamp Change)
7. Transformer 8. Mirror1(Lamp Change)
9. Lamp Limit Switch 10. Light Blocking Shelf1
11. Deuterium Lamp(D2 lamp) 12. Entrance Slit
13. Monochromator 14. Fortified Board
15. Sine Bar 16. Screw Thread Pole
17. Movable Block 18. Wavelength Limit switch
19. Gear 20. Motor2(Wavelength)
21. Photo-coupler1(Wavelength) 22. Drive PCB
23. Auto-cell Changer Connector 24. Pull-Push Rod
25. Photo-coupler2(Filter) 26. Motor3(Filter)
27. Shield Cover 28. Amplifier PCB
29. Condenser Lens 30. Sample Compartment
31. Slit Switch Equipment * 32. 4-Cell Sample Holder
33. Photo-coupler4(Slit) * 34. Motor4(Slit) *
35. Lamp Source Room 36. Slave CPU PCB
37. Light Blocking Shelf2 38. Rectifier
39. Power Distributing PCB 40. Switch Power Supply
41. Main CPU PCB 42. Program Switch for Software Update
43. LCD Display(320X240) ** 44. Keypad **
45. Sample Compartment Lid 46. Transferring PCB(In Upper Case) **
47. Upper Case 48. Viewing plate
49. Viewing Hole 50. Contrast Potentiometer for LCD
51. 232 Serial Interface 52. Printer Interface
53. Power Switch 54. Power Socket with Fuse
55. 110V/220V Selector
Note: * Only for UV-2802S, UV-2802PCS
** Only for UV-2802, UV-2802S

Layout
- 11 -
35 32 30 29 28 27 26 25 24 23
1 2 3 4 5 6 7 8 9
10 11 12 13
14 15 16 17 18 19 20 21 22
38 37 36
Figure 3.5 Layout of UV-2802, UV-2802PC Inside Top View

Layout
- 12 -
35 34 33 32 31 30 29 28 27 26 25 24 23
1 2 3 4 5 6 7 8 9
10 11 12 13
14 15 16 17 18 19 20 21 22
38 37 36
Figure 3.6 Layout of UV-2802S, UV-2802PCS Inside Top View

Layout
- 13 -
Figure 3.7 Layout of UV-2802(S), UV-2802PC(S) Inside Bottom View

Layout
- 14 -
43 44 45
46
47
Figure 3.8 Layout of UV-2802(S) Top View

Layout
- 15 -
230V
Figure 3.9 Layout of UV-2802(S) , UV-2802PC(S) Back View