Mindray DPM 1 Service Manual
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Mindray DPM 1 Service Manual

Mindray DPM 1 Service Manual

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  • Page 3 Mindray DS, nor the rights of others. Mindray DS 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 DS is strictly forbidden.
  • Page 4 Manufacturer’s Responsibility All information contained in this manual is believed to be correct. Mindray DS shall not be liable for errors contained herein nor for incidental or consequential damages in connection with the furnishing or use of this manual. Mindray will not be liable for the effects on safety, reliability and performance of this...
  • Page 5 Return Policy In the event that it becomes necessary to return a unit to Mindray DS, follow the instructions below. 1. Return authorization. Contact the Customer Service Department and obtain a Customer Service Authorization number. This number must appear on the outside of the shipping container. Returned shipments will not be accepted if the number is not clearly visible.
  • Page 6 Safety Precautions 1 . Meaning of Signal Words In this manual, the signal words WARNING are used regarding safety CAUTION and other important instructions. The signal words and their meanings are defined as follows. Please understand their meanings clearly before reading this manual. Signal word Meaning Indicates a potentially hazardous situation which, if not avoided,...
  • Page 7 WARNING: Do not connect this system to outlets with the same circuit breakers and fuses that control current to devices such as life-support systems. If this system malfunctions and generates an overcurrent, or when there is an instantaneous current at power ON, the circuit breakers and fuses of the building’s supply circuit may be tripped.
  • Page 8 Pulse oximeter Service Manual...

  • Page 9: Table Of Contents

    Content Content Chapter 1 Introduction....................1-1 1.1 General ........................1-1 1.2 Functions........................1-1 1.3 Parameters Measurement..................1-1 Chapter 2 Circuit Principle ....................2-1 2.1 Overview ........................2-1 2.2 Reliability Design......................2-7 2.3 EMC Design .......................2-8 Chapter 3 Specifications ....................3-1 3.1 General ........................3-1 3.2 Parameter Specifications ...................3-1 3.3 Display and Control....................3-1 3.4 Input/Output Communications..................3-2 3.5 Electrical specifications ....................3-2 3.6 Printing........................3-2...
  • Page 10 Content 6.3 Disinfection & Sterilization..................6-2 6.4 Technical Support.......................6-2 Pulse oximeter Service Manual...

  • Page 11: Chapter 1 Introduction

    Introduction Chapter 1 Introduction 1.1 General The DPM1 Pulse Oximeter is a non-invasive, spot-check, oxygen saturation and pulse rate monitor. It operates only on battery power using existing DPM1 disposable and reusable finger and ear sensors labeled for patients ranging from neonates to adults. Parameters monitored by the DPM1 pulse oximeter include: arterial oxygen saturation (SpO pulse rate (PR) and pulse strength.
  • Page 12 Introduction For Your Notes Pulse oximeter Service Manual...

  • Page 13: Chapter 2 Circuit Principle

    Circuit Principle Chapter 2 Circuit Principle 2.1 Overview The DPM1 pulse oximeter collects SpO2 data from the sensor and sends to mainboard. The maniboard processes the data and displays the results (SpO2 values) on the LCD screen. Pulse-strength bar, battery remained capacity and data export indication are also shown on the screen.
  • Page 14 Circuit Principle supply for IO module and analog circuit. The voltage of them is 3.3V. S1C33209 has two crystal oscillators, OSC1 and OSC3. OSC1 supplies RTC and system clock frequency, whose frequency is 32.768KHz. OSC3 supplies work frequency to the CPU, whose frequency is 22.1184MHz.
  • Page 15 Circuit Principle Fig 2-3 Data Storage Circuit 2.1.1.4 DPM1’s analog circuit includes two DAC channels. They are DRIVE channel and OFFSET channel. MAX5102A is a 8-bit resolution DAC control chip. The 2.5V reference level was produced by MAX6066. Fig 2-4 DA Circuit 2.1.1.5 DPM1 uses MAX1290 as the ADC, which of 12-bit resolution and 8 channels and parallel interface.
  • Page 16 Circuit Principle 2.5V voltage shift should be required. R27-C20, R20-C30 and R23-C19 form RC low pass filters to reduce the interference from high frequency noise. C31 is used to prevent self-oscillating and enhance the reliability. 9.09K 1% OFFSET 1000p 100K 1% 9.09K 1% AGND 10K 1%...
  • Page 17 Circuit Principle R85 work together to prevent the locking of the CPU. Fig 2-6 Delay Circuit Block The power-on and power-off signals through two diodes constitute a AND logic output signal named PCON signal, which directly controls the ON/OFF. Resistor R111 is necessary for the AND logic circuit.
  • Page 18 Circuit Principle 2.1.1.8 Serial Port Signal Voltage Level Conversion Circuit MAX202E is used for the signal voltage level conversion. The output of MAX202E is 5V TTL voltage, and the S1C33209’s I/O should use 74HC32 as the voltage level convertor and driver and isolator. R116 and R115 convert the TTL level to LVTTL. R61 and R116 can prevent short-circuit and electrostatic charge damage.

  • Page 19: Reliability Design

    Circuit Principle 2.1.1.10 Voltage Detect DPM1 requires that the battery voltage and +7V be detected all the time. S1C33209 has 8 10-bit AD channels, two of which were used. S1C33209 cannot stand that high voltage, so, a voltage divider was adopted to convert the monitored voltages to the range S1C33209 can detect.

  • Page 20: Emc Design

    Circuit Principle 2.3 EMC Design The following protections are used for EMC design in DPM1: Every IC has one by-pass capacitor, some ICs have different rating capacitors to enlarge the filter band; Serial resistors on the communication lines connected with the PC, to reduce the interference propagation;...

  • Page 21: Chapter 3 Specifications

    Specifications Chapter 3 Specifications 3.1. General 3.1.1 Basics Product Model: DPM1 Product Name: Pulse Oximeter IIb (According to MDD 93/42EEC directive) Classification: II (21CFR 870.2700, 870.2710) 3.1.2 Safety Designations Safety designations per IEC 60601-1 Standard: Type of protection against electric Internally powered equipment.

  • Page 22: Input/Output Communications

    3.4.1 Connecting the SpO sensor The interface is capable of connecting the 9-pin D connector used by the MINDRAY DS SpO sensor adaptor. The interface is designed so that common DB9 connected cannot be plugged 3.4.2 Connecting the communication cable The interface is capable of connecting the Mindray DS serial communication cable, through which the oximeter can be connected to a host computer for printing or upgrading.

  • Page 23: Physical Characteristics

    Specifications 3.7. Physical Characteristics Maximum Size: 65×140×32mm (W×H×D) Maximum Weight: 130g (not include battery and sensor) 3.8. Environment and Safety Temperature Operation: 0°C to 50°C Transportation and -20°C to 60°C storage: Humidity Operation: 15% to 95%（noncondensing） Transportation and 10% to 95%（noncondensing） storage: Altitude (above sea level) Operation:...

  • Page 24: Emc

    Specifications The oximeter meets the requirements of IEC 60601-1-1, clause 44.3 and Spillage of IEC 60601-27, clauses 30 and 34. It shall also meet the IEC 529 ingress of liquid: requirements for IPX0 devices. The oximeter meets the requirements of IEC 60601-1, clauses 42.1， Surface 42.2 and 42.3.

  • Page 25: Explosive Diagram

    Structure Chapter 4 Structure 4.1 Explosive diagram Fig 4-1 DPM1 Explosive diagram（115-001428-00） Table 1 Parts list Description 0850-20-30705 Screen cover Front housing 043-000085-00 SpO2 sensor 512F-30-28263 0850-20-30703 Button 0850-10-30722 LCD module Panhead screws M2x8 M04-051060--- 0850-30-30719 Main board 0850-20-30708 Socket fastening slide 0850-20-30704 SpO2/PC socket 0850-20-30701...

  • Page 26: Batteries Installation And Maintenance

    Structure Equipment label(English) 047-000194-00 0000-10-10902 Battery 0850-20-30702 Battery cover 0850-20-30710 Electrode spring - B 0850-20-30709 Electrode spring - A 0000-10-11177 NECK STRAP 0850-20-30707 Cathode contact spring 0850-20-30706 Anode contact spring 4.2 Batteries Installation and Maintenance 4.2.1 Install Batteries The DPM1 pulse oximeter is operated by four 1.5V AA batteries. Follow the steps below to install batteries before use: Hold the DPM1 face-down firmly by one hand.
  • Page 27 Structure 4.2.2 Battery Maintenance Use the generic 1.5V AA alkaline battery or rechargeable battery, and do not use carbon battery or poor quality batteries. Remove the battery when nonuse for long time. Replace the battery when the battery charge is insufficient for operation; abnormal power supply may lead to equipment damage or even personal injuries.
  • Page 28 Structure FOR YOUR NOTES Pulse oximeter Service Manual...

  • Page 29: Chapter 5 Test And Prompt List

    Test and Prompt List Chapter 5 Test and Prompt List 5.1 Test Procedure 5.1.1 Connection Install batteries and connect a simulator with the DPM1 . Turn on the power. LCD will display startup image and then the DPM1 enters the normal working mode. 5.1.2 Button Function Test Press all the buttons one by one to inspect if the expected operation is executed promptly.

  • Page 30: Prompt List

    Error Message Cause Initiate Error Shut down the device (if can’t, remove the Failed self-test batteries) and contact Mindray DS for service. Please Release Check for jammed button. If problem remains, Button error the Button contact Mindray DS for service.

  • Page 31: Chapter 6 Maintenance And Cleaning

    Test all the functions applicable to the patients and assure the DPM1 in right states. If the equipment shows any signs of malfunction, do not carry out any measurement on the patient and contact with the biomedicine engineer in the hospital or the Mindray DS service engineer immediately.
  • Page 32 Instructions for use for the sterilization of SpO2 sensor. Do not use gas（EtO）or formaldehyde to sterilize the equipment. 6.4 Technical Support Headquarter Custom Service Addr: 800 MacArthur Blvd.Mahwah, New Jersey 07430 USA Phone: 1.800.288.2121 1.201.995.8000 Fax: 1.800.926.4275 Website: http://www. mindray.com Pulse oximeter Service Manual...
  • Page 34 P/N: 046-000175-00 (3.0)

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