ThermoScan PRO 3000 Service Manual Rev A

This document contains propriety information of Braun ThermoScan, and its receipt or possession does not convey any rights to reproduce its contents, or to manufacture or sell any product described. Reproduction, disclosure, or use other than for the intended purpose without specific written authorization of Braun ThermoScan is strictly forbidden. Refer to the Pro 3000 Operator’s Manual for warranty information. The information and specifications contained within this service manual are subject to change without notification.
Copyright 1999 Braun ThermoScan.

All Rights Reserved

Printed in the U.S.A.

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Braun ThermoScan

Pro 3000 Service Manual

ThermoScan

Table of Contents CHAPTER 1 1.1 1.2

1.3 1.4 1.5 1.6 1.7 1.8

INTRODUCTION ...1-1 PRINCIPLE OF OPERATION ...1-1 1.2.1 Infrared Energy ...1-1 1.2.2 How the Pro 3000 Works ...1-2 FEATURES ...1-3 CONSTRUCTION ...1-4 INFRARED TEMPERATURE REFERENCE...1-4 SPECIFICATIONS ...1-5 ACCESSORIES ...1-6 CONTROLS AND DISPLAY ...1-7

CHAPTER 2 2.1 2.2

2.3

3.3

3.4

3.5

PREVENTIVE MAINTENANCE ...3-1

INTRODUCTION ...3-1 CLEANING ...3-1 3.2.1 Thermometer...3-1 3.2.2 Probe Window...3-1 INSPECTION GUIDELINES FOR USERS ...3-2 3.3.1 Every Use ...3-2 3.3.2 Battery Change Message...3-2 INSPECTION GUIDELINES FOR THE BIOMEDICAL DEPARTMENT ...3-2 3.4.1 Laboratory Accuracy ...3-2 3.4.2 Adjustment ...3-3 SERVICE/TECHNICAL INQUIRIES (UNITED STATES AND CANADA) ...3-3

CHAPTER 4 4.1 4.2

FUNCTIONAL DESCRIPTION ...2-1

INTRODUCTION ...2-1 SENSOR UNIT ...2-2 2.2.1 Probe Cover ...2-2 2.2.2 Probe Window...2-3 2.2.3 Wave Guide (Barrel) ...2-3 2.2.4 Sensor Window...2-3 2.2.5 Infrared Sensor ...2-3 2.2.6 Ambient Temperature Sensor ...2-3 ELECTRONIC CIRCUITS ...2-4 2.3.1 Power Supply ...2-4 2.3.2 Sensors ...2-4 2.3.3 Application Specific Integrated Circuit (ASIC)...2-5 2.3.4 Microcontroller...2-6 2.3.5 Non Volatile Memory...2-7 2.3.6 Switches...2-7

CHAPTER 3 3.1 3.2

GENERAL INFORMATION ...1-1

TROUBLESHOOTING ...4-1

INTRODUCTION ...4-1 POSSIBLE MALFUNCTIONS ...4-1

Pro 3000 Service Manual

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Table of Contents List of Figures FIGURE 1-1 ELECTROMAGNETIC SPECTRUM ...1-2 FIGURE 1-2 PRO 3000 BASE ...1-6 FIGURE 1-3 INFRARED TEMPERATURE REFERENCE ...1-6 MODEL NO. BB 3200 (120V & 230V)...1-6 FIGURE 2-1 PRO 3000 SENSOR UNIT ...2-2 FIGURE 2-2 PRO 3000 BLOCK DIAGRAM ...2-4 FIGURE 2-3 PRO 3000 SCHEMATIC...2-8

List of Tables TABLE 1-1 THERMOMETER FEATURES ...1-3 TABLE 1-2 COMMON ABBREVIATIONS ...1-8 TABLE 4-1 TROUBLESHOOTING ...4-2 TABLE 4-1 TROUBLESHOOTING (CONT.) ...4-4

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Braun ThermoScan

Pro 3000 Service Manual

1. Chapter 1

General Information 1.1 Introduction
              
  
  

  

 

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Electromagnetic Spectrum

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IR Thermometry

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Shortwave Radio

TV and FM Radio

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X - rays

G - radiation

Thermal Energy

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1.2.2 How the Pro 3000 Works

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General Information 1.3 Features

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    Pro 3000 NA Expected Min. Number of Temperatures within Life-span

100,000

Measurement Time

1 second

Accuracy

ASTM over ambient temperature range at 50°F - 104°F (10°C - 40°C)

Ambient Temperature Range

50°F - 104°F (10°C - 40°C)

Displayed Temperature Range

68°F- 108°F (20°C - 42.2°C)

Time Between Readings

2 seconds

Battery Type and Expected Life

2 x CR2032 (Lithium)

Display Mode

“EAR” in °C or °F

Probe Window

Hard Window

Disposable Probe Cover

Yes

Probe Cover Ejector

Yes

Probe Cover Detector

Yes

Beep

1 second after activation button is depressed.

5,000 temps (6 months heavy use)

Also, indicates error conditions

Shock Resistant Cover

Pro 3000 Service Manual

Yes

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General Information 1.4 Construction
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General Information 1.6 Specifications Accuracy Meets American Society for Testing and Materials (ASTM) Standard E1965-98

96.8°F – 102.2°F ………………. 0.4°F 36°C – 39°C ……………………. 0.2°C Outside this range: ……………..0.5°F (0.3°C)

Automatic “Power Down”:

30 seconds if no temperature taken

Battery Life:

5,000 temperatures (6 months heavy use)

Battery Type:

2 x CR2032 (Lithium) (Nominal capacity of battery is 170mA)

Case:

Durable, lightweight, plastic

Dimension:

6.4” x 1.7” x 1.2” (16.3 cm x 4.4 cm x 3.1 cm)

Measurement Time:

1 second

Min. Time Between Readings:

2 seconds

Relative Humidity:

Up to 95% relative humidity, non-condensing

Storage, Shipping, and Operating

Resolution:

0.1°F or °C

Shock Resistance:

Withstands 1 meter drop

Temperature Range:

Patient: Ambient: Storage:

Weight:

68°F to 108°F (20°C to 42.2°C) 50°F to 104°F (10°C to 40°C) -4°F to 122°F (-20°C to 50°C)

3.5 ounces (100 grams)

(without batteries)

Pro 3000 Service Manual

Braun ThermoScan

1-5

General Information 1.7 Accessories Figure 1-2

Pro 3000 Base (shown with thermometer and probe covers, not included)

Figure 1-3

Infrared Temperature Reference Model No. BB 3200 (120V & 230V)

1-6

Braun ThermoScan

Pro 3000 Service Manual

General Information 1.8 Controls and Display




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2. Chapter 2

Functional Description 2.1 Introduction
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Functional Description 2.2.2 Probe Window

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Pro 3000 Service Manual

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Functional Description 2.3 Electronic Circuits Figure 2-2

Pro 3000 Block Diagram

Voltage Regulator

Vref

Voltage Reference

& Shut Off Control & Reset Generation Battery Monitoring

Ambient Sensor

Analog Multiplexer

TAmb Thermopile

Filter Amplifier

Chopper Amplifier

Channel Switch

Ts

Control Unit

Sensor

VBAT

Power Supply

Analog to Digital Converter

ASIC VDD

Back Light

Non Volatile Mem ory

Digital Control & Temperature Calculation

Display

Switches Microcontroller

Calibration Interface

Buzzer

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Functional Description           " 
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Braun ThermoScan

Pro 3000 Service Manual

Functional Description 2.3.5 Non Volatile Memory

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Pro 3000 Service Manual

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2-7

Functional Description Figure 2-3

2-8

Pro 3000 Schematic

Braun ThermoScan

Pro 3000 Service Manual