Braun BB 3200 User manual

Thermo Menu

Operator Manual

Infrared Temperature

Reference

Model: BB 3200

Service Manual

Part Number 501650B

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 BB 3200 Operator’s Manual for warranty information.

The information and specifications contained within this service manual are subject to change without notification.

Copyright 1998 Braun ThermoScan.

All Rights Reserved

Printed in the U.S.A.

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Braun ThermoScan

BB 3200 Service Manual

ThermoScan

Table of Contents

CHAPTER 1		GENERAL INFORMATION .........................................................................................	1
1.1	INTRODUCTION.......................................................................................................................................		1
1.2	PRINCIPLE OF OPERATION......................................................................................................................		1
	1.2.1	Thermal Radiation Energy ......................................................................................................	1
	1.2.2 How the BB 3200 Works.........................................................................................................		2
1.3	CONSTRUCTION .....................................................................................................................................		3
1.4	SPECIFICATIONS .................................................................................................................................		1-4
1.5	CONTROLS (INPUTS/OUTPUTS)...............................................................................................................		5
CHAPTER 2		FUNCTIONAL DESCRIPTION ....................................................................................	1
2.1	INTRODUCTION.......................................................................................................................................		1
2.2	POWER SUPPLY.....................................................................................................................................		2
2.3	FAN.......................................................................................................................................................		2
2.4	HEATER.................................................................................................................................................		2
2.5	NULL-BALANCED BRIDGE, ANALOG, PULSE WIDTH MODULATOR, AND COMPARATOR CIRCUITS ................		2
2.6	SELF-MONITOR CIRCUIT.........................................................................................................................		2
2.7	TIMER CIRCUIT ......................................................................................................................................		3
2.8	SWITCHES .............................................................................................................................................		3
CHAPTER 3		PREVENTIVE MAINTENANCE ...................................................................................	1
3.1	INTRODUCTION......................................................................................................................................		1
	3.1.1	Maintenance and Calibration ..................................................................................................	1
	3.1.2	Cavity Inspection ....................................................................................................................	1
	3.1.3 Thermistor and Emissivity Calibration ....................................................................................		2
	3.1.4	Cleaning..................................................................................................................................	2
3.2	SERVICE/TECHNICAL INQUIRIES (NORTH AMERICA) .................................................................................		2
CHAPTER 4		TROUBLESHOOTING.................................................................................................	1
4.1	INTRODUCTION.......................................................................................................................................		1
4.2	POSSIBLE MALFUNCTIONS......................................................................................................................		1

List of Figures

FIGURE 1-1 THERMAL RADIATION FROM THE EAR CANAL AND FROM THE CAVITY-TYPE BLACKBODY SOURCE .1-2

FIGURE 1-2	MAIN MECHANICAL COMPONENTS ..........................................................................................	1-3
FIGURE 2-1	BB 3200 ELECTRICAL BLOCK DIAGRAM..................................................................................	2-1
FIGURE 2-2	BB 3200 SCHEMATIC DIAGRAM..............................................................................................	2-4

List of Tables

TABLE 1-2	COMMON ABBREVIATIONS .........................................................................................................	1-6
TABLE 4-1	TROUBLESHOOTING...................................................................................................................	4-2
TABLE 4-1	TROUBLESHOOTING (CONT.)......................................................................................................	4-3

BB 3200 Service Manual

Braun ThermoScan iii

Table of Contents

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Braun ThermoScan

BB 3200 Service Manual

1.Chapter 1

General Information

1.1Introduction

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BB 3200 Service Manual

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