Mindray BA-88A Service Manual

4 Hardware 4-
7
4.5.9 Detection of the Input Signal
Figure 4-10 Graph of input signal detection
The system should detect the signal from filter position sensor, aspirate button,
cuvette temp. controlling fan blocking. Before detected by control module, all input
signals should go through the level translation circuit.
4.5.10 Analogue Board Control
Figure 4-11 Graph of analogue board controlling
Three signals are controlled by analogue board: digital potentiometer control signal
(DCPx), channel selection signal (CH), AD collection and control signal (AD_Ox and
AD_lx). All control signals are generated by control module. The signals between the
control module end and analogue board should go through level translation (TTL to
LVTTL).
4.6 Analogue Board
The analogue board realizes the functions of photoelectric signal, temperature
sensor signal modulation and amplification, AD collection.
 The photodiode transforms the light signal which has passed through the flow
cell (or cuvette) into voltage signal. The voltage signal will be filtered,
amplified inversely, and finally output at the outputting end of the AD
converter through selectable switch.

Mindray BA-88A Specifications

General

Light source	Halogen lamp
Display	7 inch touch screen
Printer	Thermal printer
Interface	RS232
Wavelengths	340, 405, 546, 578, 630nm
Carry-over	< 1%
Power Supply	AC 100~240V, 50/60Hz
Operating Temperature	15-30°C

Summary

Foreword

Safety Symbols

Details the meaning and interpretation of various safety symbols used throughout the manual.

Safety Precautions

Preventing Electric Shock

Provides instructions to prevent electric shock, including warnings about opening covers and handling power.

Preventing Personal Injury Caused by Moving Parts

Preventing Infection

Details necessary precautions to prevent biohazardous infection when handling samples.

Treating Waste Liquids

Precautions on Use

Intended Use

Defines the system's intended application as an in vitro quantitative analyzer for clinical chemistries.

Operator

Specifies that the system must be operated by trained clinical professionals or authorized personnel.

Environment

Operating the System

Provides essential guidelines for operating the system safely and efficiently, including calibration and QC.

Maintaining the System

System Maintenance Procedures

Details standard maintenance procedures, including cleaning, power management, and part replacement guidance.

System Installation

Basic Installation Requirements

Installation Procedures

Step-by-step guide for receiving, moving, connecting, powering on, and testing the analyzer.

Hardware

Safety Precautions for Hardware

Highlights crucial safety warnings when working with circuit boards, including ESD protection.

CPU Board

CPU Extension Board

Analogue Board

Power board

Connection of the Hardware System

Illustrates the system's hardware connections and interfaces between various boards and external devices.

Service and Maintenance

Software Upgrading

Explains how to upgrade system software using a U disk, detailing procedures for CPU and extension boards.

Maintenance Procedures

Provides detailed procedures for replacing consumable parts like tubing and lamps, and for replacing CPU boards.

Troubleshooting

Alarm Message Classification

Categorizes error messages based on severity and explains how logs record error details.

Levels of Errors

Classifies system failures into three levels to facilitate troubleshooting and identify common corrective measures.

Error Display Methods

Error Details and Causes

Provides a comprehensive table detailing error codes, descriptions, causes, and corrective measures for various system failures.