MINDRAY BS 300 Service Manual

BS-300

Chemistry Analyzer

Service Manual

© 2006 Shenzhen Mindray Bio-medical Electronics Co., Ltd. All rights Reserved.
For this Service Manual, the issued Date is 2006-06 (Version: 1.0).

Intellectual Property Statement

SHENZHEN MINDRAY BIO-MEDICAL ELECTRONICS CO., LTD. (hereinafter called
Mindray) owns the intellectual property rights to this Mindray product and this
manual. This manual may refer to information protected by copyrights or patents and
does not convey any license under the patent rights of Mindray, nor the rights of
others. Mindray does not assume any liability arising out of any infringements of
patents or other rights of third parties.

Mindray intends to maintain the contents of this manual as confidential information.
Disclosure of the information in this manual in any manner whatsoever without the
written permission of Mindray is strictly forbidden.

Release, amendment, reproduction, distribution, rent, adaption and translation of this
manual in any manner whatsoever without the written permission of Mindray is
strictly forbidden.

, , , , are the registered
trademarks or trademarks owned by Mindray in China and other countries. All
other trademarks that appear in this manual are used only for editorial purposes
without the intention of improperly using them. They are the property of their
respective owners.

Responsibility on the Manufacturer Party

Contents of this manual are subject to changes without prior notice.
All information contained in this manual is believed to be correct. Mindray shall not

be liable for errors contained herein nor for incidental or consequential damages in
connection with the furnishing, performance, or use of this manual.

Mindray is responsible for safety, reliability and performance of this product only in
the condition that:

 all installation operations, expansions, changes, modifications and repairs of this

product are conducted by Mindray authorized personnel;

 the electrical installation of the relevant room complies with the applicable

national and local requirements;

 the product is used in accordance with the instructions for use.

WARNING:

It is important for the hospital or organization that employs this
equipment to carry out a reasonable service/maintenance plan.
Neglect of this may result in machine breakdown or injury of human
health.

NOTE:

This equipment is to be operated only by medical professionals trained
and authorized by Mindray or Mindray-authorized distributors.

I

Warranty

THIS WARRANTY IS EXCLUSIVE AND IS IN LIEU OF ALL OTHER WARRANTIES,
EXPRESSED OR IMPLIED, INCLUDING WARRANTIES OF MERCHANTABILITY
OR FITNESS FOR ANY PARTICULAR PURPOSE.

Exemptions

Mindray's obligation or liability under this warranty does not include any
transportation or other charges or liability for direct, indirect or consequential
damages or delay resulting from the improper use or application of the product or the
use of parts or accessories not approved by Mindray or repairs by people other than
Mindray authorized personnel.

This warranty shall not extend to:
 any Mindray product which has been subjected to misuse, negligence or

accident;

 any Mindray product from which Mindray's original serial number tag or product

identification markings have been altered or removed;

 any product of any other manufacturer.

Return Policy

Return Procedure

In the event that it becomes necessary to return this product or part of this product to
Mindray, the following procedure should be followed:

1 Obtain return authorization: Contact the Mindray Service Department and

obtain a Customer Service Authorization (Mindray) number. The Mindray
number must appear on the outside of the shipping container. Returned
shipments will not be accepted if the Mindray number is not clearly visible.
Please provide the model number, serial number, and a brief description of
the reason for return.

2 Freight policy: The customer is responsible for freight charges when this

product is shipped to Mindray for service (this includes customs charges).

3 Return address: Please send the part(s) or equipment to the address offered

by Customer Service department

Company Contact

Manufacture: Shenzhen Mindray Bio-Medical Electronics Co., Ltd.
Address:

Phone:
Fax:

Mindray Building, Keji 12th Road South, Hi-tech Industrial Park,
Nanshan, Shenzhen, P.R.China, 518057

[phone] 26582888
[phone] 26582501

II

Preface

Who Should Read This Manual

This manual is written for service professionals authorized by Mindray.

Conventions Used in This Manual

Safety Symbols

This chart explains the symbols used in this manual.

When you see … Then …

WARNING:

Read the statement following the symbol. The
statement is alerting you to an operating hazard
that can cause personal injury.

BIOHAZARD:

CAUTION:

NOTE:

Read the statement following the symbol. The
statement is alerting you to a potentially
biohazardous condition.

Read the statement following the symbol. The
statement is alerting you to a possibility of
system damage or unreliable results.

Read the statement following the symbol. The
statement is alerting you to information that
requires your attention.

Graphics

All graphics, including screens and printout, are for illustration purpose only and
must not be used for any other purposes.

i

Contents

Contents

Preface........................................................................................................................................... i

Who Should Read This Manual .............................................................................................. i

Conventions Used in This Manual .......................................................................................... i

1 Specifications....................................................................................................................1-1

1.1 System Feature...................................................................................................1-1

1.2 Loading System Feature .....................................................................................1-1

1.3 Analysis System Feature.....................................................................................1-2

1.4 Others..................................................................................................................1-2

2 System Installation...........................................................................................................2-1

2.1 Check before Installation.....................................................................................2-1

2.2 Installation Procedure..........................................................................................2-1

3 System Descriptions ........................................................................................................3-1

3.1 Dispensing System..............................................................................................3-1

3.1.1 Probe assemblies.................................................................................3-1

3.1.2 Disk assemblies ...................................................................................3-2

3.2 Feeder .................................................................................................................3-3

3.2.1 Feeder assemblies...............................................................................3-3

3.2.2 Manipulator...........................................................................................3-4

3.3 Temperature Control System...............................................................................3-5

3.3.1 Temperature control assembly.............................................................3-5

3.3.2 Reagent preheating..............................................................................3-6

3.3.3 Reagent refrigeration............................................................................3-7

3.4 Photometric System ............................................................................................3-8

3.5 Fluid System........................................................................................................3-8

3.6 ISE Module (optional)........................................................................................3-10

Functions of Boards.........................................................................................................4-1

4

4.1 Main Control Board..............................................................................................4-1

4.2 Power Drive Board ..............................................................................................4-2

4.3 A/D Conversion Board.........................................................................................4-2

4.4 Reagent Refrigeration Board...............................................................................4-2

4.5 Level Detection Boards .......................................................................................4-3

4.6 Feeder Connection Board ...................................................................................4-3

4.7 Manipulator Connection Board............................................................................4-3

4.8 Probes Connection Board ...................................................................................4-4

4.9 Power Supply Assembly......................................................................................4-4

5 Maintenance and Service.................................................................................................5-1

5.1 Replacing Light Filter Assembly ..........................................................................5-1

5.2 Replacing Optical Fiber.......................................................................................5-4

5.3 Adjusting Reaction Disk, Manipulator and Feeder..............................................5-7

5.4 Adjusting Probes and Disks.................................................................................5-8

5.5 Replacing Components of ISE Unit (optional)...................................................5-10

5.5.1 Replacing Tubing................................................................................5-10

5.5.2 Replacing Pumps...............................................................................5-13

5.5.3 Replacing ISE Module........................................................................5-13

6 Software Introduction.......................................................................................................6-1

1

Contents

6.1 System Software..................................................................................................6-1

6.1.1 System initialization..............................................................................6-1

6.1.2 Shutdown processing...........................................................................6-2

6.2 Control Software..................................................................................................6-2

7 Service Flow......................................................................................................................7-1

7.1 Fluid Level Detection Failure of Reagent Probe..................................................7-1

7.2 Fluid Level Detection Failure of Sample Probe...................................................7-2

7.3 Liquid Dropping From Probes..............................................................................7-3

7.4 Failing to Detect Level of Water for Washing Exteriors.......................................7-4

7.5 Abnormal Results................................................................................................7-5

7.5.1 All Results Being Abnormal..................................................................7-5

7.5.2 Some Results Being Abnormal.............................................................7-5

7.5.3 Several Results Being Abnormal..........................................................7-6

7.6 Insufficient Light Intensity of Lamp......................................................................7-7

7.7 Temperature Control Failure................................................................................7-8

7.8 Bar Code Scanner (optional) Failure...................................................................7-9

7.9 Feeder Failure ................................................................................................... 7-11

7.9.1 Transducer Distribution of the Feeder................................................7-11

7.9.2 Feeder Failure....................................................................................7-12

7.9.3 Manipulator Failure.............................................................................7-13

7.10 Troubleshooting of ISE Unit (optional)...............................................................7-13

8 Mechanical Structure .......................................................................................................8-1

9 Tools and Parts.................................................................................................................9-1

9.1 Service Tools .......................................................................................................9-1

9.2 Parts ....................................................................................................................9-1

10

Maintenance And Test Software....................................................................................10-1

General..............................................................................................................10-1

10.1

Command ..........................................................................................................10-3

10.2

10.2.1 Single Command Area.......................................................................10-3

10.2.2 Macroinstruction Area.......................................................................10-10

10.3 PARA and Speed.............................................................................................10-13

10.4 Temperature.....................................................................................................10-19

10.5 Photoelectric....................................................................................................10-20

Appendix A Board s Connection Diag rams.............................................................................. A-1

Appendix B Test Points of Boards............................................................................................ B-1

2

1 Specifications

X

1.1 System Feature

 Dimension: 980mm × 710mm × 1200mm (W × D × H)
 Weight: 175kg
 Power supply: AC100-130V ± 10% or 200-240V ± 10%
 Input power: 1000VA
 System: optional, multi-channel, multi-test
 Scope: Clinical chemistries
 Test types: end-point, kinetic and fixed-time. All support double-reagent and

double-wavelength

 Calibration type: Linear (single-point, two-point and multi-point), Logistic 4P,

Logistic 5P, Exponential 5P, Polynominal 5P, Parabola, Spline

 QC rules: Westgard multi-rule,

Twin-plot

 Tests analyzed simultaneously: 48 (single-reagent) / 24 (double-reagent); if the

ISE unit (optional) is connected, 3 (Na, K and Cl included) or 4 (Na, K, Cl and Li
included) tests are added

 Throughput: maximum 300tests/h; if the ISE (optional) is connected, maximum

420tests/h (Na, K and Cl included) or maximum 480 tests/h (Na, K, Cl and Li
included)

Specifications

−

-R, Cumulative sum check, Cumulative error,

1.2 Loading System Feature

 Sample volume: 3µl~45µl; Precision: 0.5µl; for the ISE (optional), 70µl serum,

70µl plasma, 140µl diluted urine

 Sample disk: general sample disk, including the inner circle and the outer circle
 Sample tube position: 60 positions, including 6 calibrator positions, 3 control

positions, 5 for STAT sample positions; 5 virtual disks for maximum 300 samples

 Sample probe: with a built-in level detector; equipped with auto safeguard;

capable of tracking sample level

 Washing function: automatically washing interior and exterior of sample probe;

carryover no more than 0.1%

 Pre-dilution: 4 ≤ dilution rate ≤ 150, taking reaction cuvettes as the container

 Reagent volume: 30-450ul; Precision: 1ul
 Reagent disk: including the inner circle and the outer circle
 Reagent position number: 25/50 reagent positions. Each reagent position is

available for containing one Hitachi 7060 bottle, one Hitachi 7170 bottle, one
Mindray inner-circle bottle or one Mindray outer-circle bottle.

 Reagent probe: One independent probe which has a built-in level detector; is

equipped with auto safeguard and capable of tracking reagent level

 Washing function: automatically washing interiors and exteriors of reagent probes;

carryover no more than 0.1%

1-1

1-

Specifications

 Mixing bar: for single-reagent tests, it functions after sample dispensing; for

double-reagent tests, it functions after the dispensing of the sample and the
second reagent.

1.3 Analysis System Feature

 Lamp house: 50w lamp
 Light splitting mode: Splitting by optical fiber, filtering by an interference filter.
 Half band-width: 10±2nm
 Wavelength: 340, 405, 450, 510, 546, 578, 630, 670, 700nm
 Absorbance range: -0.1~5, 10mm optical path conversion
 Reaction cuvette: 5 × 6 × 25mm, optical path 5mm. Material: PP, disposable.

Volume: 750uL

 Reaction liquid volume: 180-500µl
 Max. reaction time: 20 minutes
 Reaction temperature: 37±0.3℃ with fluctuation of ±0.1℃

1.4 Others

 Operating system: Windows 2000 or Windows XP
 Display: optional
 System interface: RS-232
 Printer: optional
 Built-in bar code scanner: optional
 ISE module: optional

1-2

2 System Installation

NOTE:

The analyzer should be installed or moved to another place by
Mindray-authorized personnel only.

2.1 Check before Installation

The user should provide the environment that meets the requirements mentioned in
the Operation Manual. Check if the environment meets the requirements before
installing the analyzer . Refer to the chapter 2 of the Operation Manual for details.

2.2 Installation Procedure

System Installation

1 Ensure available installation fields and environments in hospitals.
2 Confirm the reagents and calibrators.
3 Go to the installation field, and then check the delivery list for acceptance.
4 Install the four handles on the four angles of the analyzer. Move the analyzer

to the installation field, fix the casters, and then remove the handles.
5 Insta ll the computer, display and printer.
6 Open the front plate, and check whether cable connections are loose. Open

the top plate, check whether the probe assemblies, reagent disk and sample

disk are intact and in good performance.
7 Connect the communication cable, power cable, grounding wire, waste tank

and deionized water tank. Install the used-cuvette bucket, reagent probe,

sample probe and mixing bar.
8 Top up the deionized water tank with deionized water.
9 Put reaction cuvettes in the feeder. Remember to check whether the surfaces

of the cuvettes are smooth. In case of any bump, remove it before loading the

cuvette to the compartment. Do not touch the light transmission part of the

cuvette in which the colorimetric reading is taken.
10 Load acid and alkaline detergents to positions 46 and 47, and distilled water

to positions 49 on the reagent disk. Load distilled water to position 60 on the

sample disk.
11 Switch on the analyzer as follows: POWER → ANALYZING UNIT POWER

→display → computer → printer.
12 After Windows is started, double-click the icon of BS-300 on the desktop to

start the system software. The system program will automatically finish the

self-test, become online and warm up the reaction cuvettes within about 30

minutes.
13 Select the [System/Status] menu, and then observe the system status and

record it in the table below:

2-1

System Installation

Feeder status Unconnected Full Half full Empty
Reaction disk

temperature
Reagent disk

temperature
Ambient temperature
Waste tank status Abnormal (full) Normal (not full)
Detergent status Abnormal (empty) Normal (available)
Printer status No printer Normal
Main control unit Unconnected Idle Running
Reaction disk unit Unconnected
Reagent disk unit Unconnected
Sample disk unit Unconnected
Loading/unloading unit Unconnected
Temperature control

unit
Lamp

Unconnected

Network connection Unconnected

Wavelength Dark current Light source base
340
405
450
510
546
578
630
670
700
Reference light system

14 Select the [System/Maintenance] menu. Then select the Motion tab page,

and implement all sub-steps of each unit to see whether they are normal. In

case of any exception, adjust it.
15 Wash the interiors and exteriors of the sample probe, reagent probe and

mixing bar for several times to make the fluid circuit filled.
16 Set parameters for test, reagent and calibration under the Parameters menu.

2-2

System Installation

17 Request for calibration and samples, run and then debug the results.
18 After debugging the results, fill them in the table below:

Test ALT CREA BUN
Target value
2sd range
Test value 1
Test value 2
Test value 3
Test value 4
Test value 5
Test value 6
Test value 7
Test value 8
Test value 9
Test value 10

19 Training

Can the user complete daily tests? Yes □ No □
Is the user familiar with the analytical methods such as

kinetic, two-point, endpoint?
Is the user familiar with the daily, weekly and monthly

maintenance and relevant maintenance methods?
Is the user skilled in washing dust screens? Yes □ No □
Is the user skilled in cleaning and replacing the probes

and the mixing bar?
Is the user skilled in replacing the plunger assemblies

of syringes?
Is the user skilled in replacing the lamp? Yes □ No □
Is the user skilled in maintenance of built-in bar code

scanner?
Is the user skilled in maintenance of ISE unit? Yes □ No □
Does the user know the positions, roles and

preparation methods of distilled water and acid and
alkaline detergents?

Yes □ No □

Yes □ No □

Yes □ No □

Yes □ No □

Yes □ No □

Yes □ No □

2-3

3 System Descriptions

The BS-300 analyzer consists of the analyzing unit, operation unit and output unit.
The analyzing unit consists of the dispensing system, feeder, temperature control

system, photometric system and fluid system.

3.1 Dispensing System

The dispensing system consists of the probe assemblies (including the reagent
probe assembly, sample probe assembly and mixing bar assembly), reagent disk,
sample disk and reaction disk.

3.1.1 Probe assemblies

System Descriptions

Among the probe assemblies, the mixing bar assembly is the same as the reagent
probe assembly and the sample probe assembly, except that the knurled axis is
30cm shorter.

Every probe assembly has a horizontal photoelectric switch and a vertical
photoelectric switch. These switches are used for defining horizontal and vertical

3-1

System Descriptions

initial positions of probe assemblies. The horizontal and vertical step motors
precisely control the horizontal and vertical movements of the probe assemblies, and
the synchronizing belts serve as the gearing.

The shaft and the bushing must corporate with each other precisely, so they cannot
be used confusedly.

3.1.2 Disk assemblies

The three disk assemblies are different in their coders. The coder corresponds to the
position where disks should stop. There is an initial-position mark under every coder.
The three coders of the three disks have three coder transducers. Each transducer
has two photoelectric switches for inducing the rotation and initial position of the
disk.

The step motors control the disk assemblies, and the synchronizing belts serve as
the gearing.

3-2

System Descriptions

There is a build-in bar code scanner to the left of the sample disk. The scanner is
optional.

3.2 Feeder

The feeder consists of the feeder assemblies and the manipulator. It is designated to
send cuvette segments to the reaction disk, take out the used ones and abandon
them to the used-cuvette bucket.

3.2.1 Feeder assemblies

The feeder assemblies include the gearing assembly, cuvette compartment
assembly, cuvette-pushing assembly and no-cuvette detection assembly (see the
following figure).

The supporting plate of the feeder assemblies is a square piece of steel that is
connected to the analyzing unit by its four poles, which are secured by four nuts.
Unscrewing the nuts, you can disassemble the feeder assemblies from the analyzing
unit easily.

Sample probe assemblyBuild-in bar code scanner

3-3

System Descriptions

There are five transducers that are shown in the figure below.
The no-cuvette transducer is used to detect whether there is a cuvette segment at

the loading position. The insufficient-cuvette transducer is used for determine
whether there are less than 10 reaction cuvettes in the compartment or not. If yes,
the analyzer will give a prompt.

Pressure Transducer

No-Cuvette
Transducer

3.2.2 Manipulator

Two step motors (horizontal and vertical) supply power for horizontal and vertical
movements of the manipulator.

The upper finger and lower finger are same in their structures. They work together to
replace used cuvette segments with new ones.

The manipulator runs in a relatively complicated way. There are four transducers on
it: vertical transducer, horizontal transducer and two finger transducers.

Cuvette-Pushing
Limit Transducer

Insufficient-Cuvette

Transducer

Cuvette-taking limit

transducer

3-4

System Descriptions

3.3 Temperature Control System

3.3.1 Temperature control assembly

The temperature control assembly of the reaction disk consists of the
temperature-controlled pot, heat-insulating sheath/plate, top heater, bottom heater,
reaction disk/cuvettes, photoelectric seat, temperature transducer, fan and control
circuit.

3-5

System Descriptions

1: Temperature transducer and the support
2: Fan
3: photoelectric seat
4: Heat-insulating sheath
5: top heater
6: Cover
7: temperature-controlled pot
8: bottom heater

Upper heater: square in shape, 220/110VAC, 125W
Lower heater: ring in shape, 220/110VAC, 350W
Total power: 475W.
The function of heaters is to compensate the heat for incubating the reagent and for

maintaining the temperature of the temperature-controlled chamber .
Fans are used in series in the temperature-controlled chamber. It makes the air

circulating in the chamber, and enhances the convective heat exchange. There are
four fans in the chamber. All have the alarm function.

The temperature transducer feeds back the air temperature at the position several
millimeters from the bottom of the reaction cuvette.

The overheat protection switch is to switch off the power when the temperature
controller does work and the temperature-controlled chamber reaches 55℃, so as to
avoid overheat or fire. When the temperature-controlled chamber becomes 35℃,
this switch will automatically be reset.

3.3.2 Reagent preheating

The preheating assembly consists of two aluminum plates, a Te flon tube having nine
loop sections, heating components, transducer, temperature protection switch,
thermal conductive colloid, a section of tube and the reagent probe.

The temperature of the thermal source of the preheater is controlled at 45℃. The
initial temperature of the reagent is 4 ~ 10℃ when it is taken out of the refrigeration

3-6

System Descriptions

chamber. When the reagent passes the heater, its temperature increases to 35℃.
Then the reagent is added into the reaction cuvette and the preheating process is
finished.

Reagent preheating assembly

3.3.3 Reagent refrigeration

The refrigeration module consists of refrigeration cabin, PU heat-insulating sheath,
reagent disk, reagent bottle, temperature transducer, refrigeration flakes, heat
sinking component, fan and control circuit. The refrigeration module is shown in the
following figure.

The refrigeration assembly consists of fan, hot-end radiator, POM connector,
cold-end heat-conductive aluminum block, and PELTIER refrigeration flake. Each
analyzer has two such refrigeration assemblies, as shown in the figure below. The
cold-side of the refrigeration flake clings to the refrigeration compartment, and the
hot-side clings to the radiator (The side having letters should cling to the refrigeration
aluminum block).

3-7

System Descriptions

Each refrigeration flake corresponds to a heat-sinking block and a cooling fan. It
should be installed with the cold side upward.

3.4 Photometric System

The photometric system consists of a measurement photometric system and a
reference photometric system. The measurement photometric system provides 9
monochromatic lights to measure the absorbance of the reacting liquid in the rotating
reaction cuvettes. The reference photometric system compensates the
measurement photometric system to make the measurement more accurate.

Tungsten-halogen

lamp

卤钨灯 聚光镜

Biconvex lens

3.5 Fluid System

The fluid system is shown in the following figure.

Main fiber

传光束

Plano

小透镜 反应杯 滤光片 小透镜 光电管

convex lens

Fibers

传光束小端

Cuvette Filter

Photodiode

convex lens

共路

光电管

Plano

参考光路

Reference light

Photodiode

测量光路

Measurement

.
.
.

lights

3-8

Sample syringe

System Descriptions

Reagent syringe

Mixing bar

As shown in the figure above, the fluid system consists of interior washing and
exterior washing.

The syringe assembly controls the aspiration volume by controlling the travel of the
sample/reagent syringe. It is the core part of the fluid system.

3-9

System Descriptions

3.6 ISE Module (optional)

The ISE module that is used to measure the concentration of K+, Na+, Cl- and Li+ in
serum, plasma and urine consists of ion-selective electrodes, peristaltic pumps and
calibrants.

ISE

Pump W

Calibrant B

Pump BPump A

Calibrant A

Waste

3-10

System Descriptions

3-11

4 Functions of Boards

The analyzer is integrated with the following boards:

 Main control board
 Power drive board
 Sample level detection board
 Reagent level detection board
 A/D conversion board
 Ten photoelectric conversion boards (340nm, 405nm, 450nm, 510nm, 546nm,

578nm, 630nm, 670nm, 700nm and reference light)

 Reagent refrigeration board
 Power supply assembly
 Manipulator connection board
 Feeder connection board
 Probes connection board

Functions of Boards

Power supply assembly

PFC board

12V&5V board

24V board

ISE power supply board

A/D conversion board

10 photoelectric

conversion boards

Build-in sample bar

code scanner

4.1 Main Control Board

The main control board is the control center of the whole hardware system. It
consists of the control circuits of 6 functional units (including main control unit,
photoelectric unit, reagent unit, sample unit, loading/mixing unit, temperature control
unit). Each functional unit has an MCU. They communicate in the multi-unit mode
and thus compose the whole control system.

ISE module

PC

Main control board

Step motors

DC motors

Pumps, valves

Level detection boards

Transducers

Power drive board

Heaters of reaction

disk

Reagent pre-heater

Lamp

Reagent

refrigeration board

Peltiers

transducers

The functions of the main control board are:
 communicating with the PC through the RS232, receiving and analyzing

instructions from the PC and sending data to the PC.

 controlling photoelectric conversion through the interface with the A/D conversion

board, reading and saving data from the A/D conversion board.

 outputting control signals of each unit through the interface with the power drive

board.

4-1

Functions of Boards

 receiving signals of fluid level detection and bump collision through the interface

with the level detection boards.

 detecting signals from temperature transducers and controlling temperature of the

reaction disk and reagent preheating.

 receiving signals from position transducers, deionized water transducer and waste

transducer and controlling the transducers.

 controlling the built-in sample bar code scanner, reading the data and sending it to

the PC.

 controlling the ISE module, reading the results and sending them to the PC.

4.2 Power Drive Board

The main functions of the power drive board are to receive the control signals from
the main control board and control drive components. The block diagram of the
power drive board is shown in the figure below.

Control signals from
Main Control Board

to 13 step motors to 2 DC motors

to 2 solenoid valves to 3 pumps

to 2 heaters of

reaction disk

4.3 A/D Conversion Board

The 10 photoelectric conversion circuits convert the intensity signals of the lights
transmitting through the reaction cuvettes to electric signals, and then transmit them
to the A/D conversion board through a 5-core shielded cable. Photoelectric
conversion boards for different wavelengths have different gains and cannot be
replaced by each other.

The A/D conversion board filters and amplifies the 10 channels of electric signals
output from the photoelectric conversion boards, transmits them through the
multi-way gating switch to the A/D converter and then sends them to the main control
board for further processing.

to lamp power

to 2 magnets

to reagent
preheating

4.4 Reagent Refrigeration Board

The circuits of the reagent refrigeration board include the refrigeration circuit and the
fan circuit.

The refrigeration circuit is needed to work continuously, so it is powered separately.
The control objects of the reagent refrigeration board include:
Reagent refrigeration: 2 PELTIER components, 4 fans.

4-2

Heat sink system for the whole device: 3 lamp-cooling fans, 4 temperature control
fans of the reaction disk.

4.5 Level Detection Boards

The level detection boards that include sample level detection board and reagent
level detection board are used to detect the fluid level of sample and reagent
separately. When the analyzer aspirates reagents/samples, the probes dip into the
liquid to a specific depth, so as to avoid carryovers that have impacts on test results,
and to avoid air aspiration when the reagent/sample is insufficient.

4.6 Feeder Connection Board

The feeder connection board transfers the signals between the feeder transducer
and the main control board, and connects the power drive board and the loading
motor (DC).

Functions of Boards

Connections:

Connector Connected with

J91 Front transducer
J92 Back transducer
J93 Intermediate transducer
J94 No-cuvette transducer
J95 Pressure transducer
J96 Motor control wire (connected with the power drive board)
J97 Motor control wire (connected the motors)
J98 Cuvette-loading button
J99 Connection wire of the main control board

4.7 Manipulator Connection Board

The manipulator connection board transfers the signals between the manipulator
transducer and the main control board, and connects the power drive board and the
electromagnet.

Connections:

Connector Connected with

J101 Horizontal loading position transducer
J102 Vertical loading position transducer
J103 Electromagnet-closing transducer of the lower hand

4-3

Functions of Boards

Connector Connected with

J108 Electromagnet-closing transducer of the upper hand
J104 Drive wire of the electromagnet of the upper hand
J105 Drive wire of the electromagnet of the lower hand
J106 Drive wire of the electromagnet (connected with the power drive

board)
J107 Connection wire of the main control board
J109 Safeguard transducer (reserved)
J110 Safeguard transducer (reserved)

4.8 Probes Connection Board

The probes connection board transfers the signals between the sample/reagent level
detection board and the main control board, inputs the temperature signals, outputs
the reagent preheating signals, and transfers the signals between the power drive
board and the mixing motor (DC).

Connector Connected with

J200 Interface of the sample level detection board
J201 Interface of the reagent level detection board
J202 Interface of the mixing motor (DC)
J203 Sample detection signal interface of the main control board
J204 Reagent detection signal interface of the main control board
J205 Temperature control signal interface of the reaction disk
J206 Reagent preheating signal interface
J207 Interface of the power drive board

4.9 Power Supply Assembly

The power supply assembly consists of three boards: PFC board, 24V board,
12V&5V board and ISE (optional) power supply board.

The functions of the PFC board include:

 AC/DC conversion;
 Supplying the +390V and VDD voltage to the 24V board and the 12V&5V board;
 Supplying stable 12V voltage for the lamp;
 Supplying control signals of the analyzing unit switch to control the C12V, 5V and

24V outputs.

The 24V board converts the 390VDC current transmitted from the PFC board to the
separated 24VDC outputs through the forward converter.

4-4