Welch Allyn SureTemp Plus 692, SureTemp Plus 690 Service Manual

Service Manual

SureTemp® Plus

Model 690 and 692 Thermometers

Part No. 71221-0000 Rev. G

© 2003 by Welch Allyn, Inc. All rights reserved. No part of this manual may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, without prior consent in writing from Welch Allyn, Inc.

Welch Allyn and SureTemp Plus are trademarks of Welch Allyn, Inc. All rights reserved.

CaviCide® is a registered trademark of Metrex Research Corporation [phone].

Printed in the USA.

U.S. Patent 5,632,555; 6,000,846; 6,036,361; and 6,971,790. Additional U.S. and foreign patents pending.

AGENCY APPROVALS

CERTIFIED TO: CAN/CSA STD C22.2 NO. 601.1

		CONFORMS TO: IEC 60601-1, 60601-1-2, UL STD 2601-1
C	US
	166292
	5/38-46 SOUTH STREET	EMC Framework of Australia
	WELCH ALLYN PTY LTD
	RYDALMERE
	NSW 2116
	AUSTRALIA

The CE mark on this product indicates that the product has been tested to and conforms with the provisions noted within the 93/42/EEC Medical Device Directive.

Authorized European Representative Address:

European Regulatory Manager

Welch Allyn Ltd.

Navan Business Park

Dublin Road

Navan, County Meath

Republic of Ireland

Tel.: + 353 46 90 67700

Fax: + 353 46 90 67756

Table of Contents

Electromagnetic Immunity and Emissions Declaration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Immunity Standard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Emissions Summary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

1 General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

1.1 About this Manual. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1.1.1 Related Document . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1.2 Technical Support and Service Centers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1.3 Return Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1.4 Safety and Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1.5 Classifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

2 Operating Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2.1 Basic System Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2.1.1 Instrument . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2.1.2 Probe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2.1.3 Probe well . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2.1.4 Probe covers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2.1.5 Batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2.1.6 Wall Mount . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

2.2 Model Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2.3 Operating Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.3.1 Instrument Reset. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2.3.2 Power-On Self Test (POST) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2.3.3 Low Power Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2.3.4 Predict Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2.3.5 Monitor Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2.3.6 Pulse Timer Mode (Model 692 only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 2.3.7 Backlight (Model 692 only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 2.3.8 Horn . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 2.3.9 F/C Conversion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 2.3.10 Temperature Recall . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 2.3.11 Biotech Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

2.4 Instrument Security. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

2.4.1 Temperature Count Security Feature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 2.4.2 Instant-On Security Feature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

3 Preventive Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

3.1 Six-Month Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

3.2 Standard Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

3.3 Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

3.3.1 Cleaning the Thermometer and Probe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

3.3.2 Cleaning The Removable Probe Well. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

3.4 Replacing the Batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

3.5 Calibration Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

3.5.1 Cal-Key Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

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3.5.2 Model 9600 Calibration Tester Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 3.5.3 Model 9600 Plus Calibration Tester Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

4 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

4.1 Types of Errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

4.1.1 Battery Indications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

4.1.2 Ambient Temperature Out of Range. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

4.1.3 Patient Temperature Out of Range. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

4.1.4 Probe Errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

4.1.5 Instrument Errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

4.1.6 Error Codes: Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

4.2 Field Serviceable Repairs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

4.3 Field Serviceable Parts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

5 Theory of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

5.1 Technical Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

5.1.1 Temperature Probes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

5.1.2 Probe Switch. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

5.1.3 Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

5.1.4 Low Battery Detection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

5.1.5 Temperature Measurement and Display. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Appendix A Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Appendix B Limited Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

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Electromagnetic Immunity and Emissions Declaration

Immunity Standard

	IEC Basic Standard	IEC 60601-1-2 2001
	Electrostatic discharge IEC 61000-4-2	± 6kVc
		± 8kVc
	RF EMF Immunity IEC 61000-4-3	3/10 V/m
		80 MHz-2.5GHz
	Magnetic field IEC 61000-4-8	3A/m
		150kHz-80MHz

Emissions Summary

The SureTemp® Plus model 690 and 692 thermometers are intended for use in the electromagnetic environment specified below. The customer or the user of the model 690 and 692 should assure that it is used in such an environment.

Guidance and Manufacturer’s declaration - electromagnetic emissions

Emissions test	Compliance
RF emissions	Group 1
CISPR 11	Class B
Harmonic emissions	Complies
IEC 61000-3-2
Voltage fluctuations	Complies
and flicker emissions
IEC 61000-3-3

Electromagnetic environment-guidance

The SureTemp® Plus model 690 and 692 Thermometers are suitable for use in all establishments, including establishments that are connected to the public low-voltage power supply network.

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1.General Information

1.1About this Manual

This manual describes maintenance and troubleshooting procedures for the SureTemp® Plus Model 690 and 692 Thermometers. Most topics and procedures described in this manual are applicable to both products. Where there are differences, it is noted to which product the topic refers.

1.1.1 Related Document

End-user operation of the Model 690 and 692 Thermometers is covered in the SureTemp® Plus Model 690 and 692 Operator's Manual PN 71213-0000.

1.2Technical Support and Service Centers

For information about any Welch Allyn product, call Welch Allyn Customer Support:

USA	[phone]	Australia	+61	2 9638 3000
	+ 1 315 685 4560		[phone]
Canada	[phone]	China	+86	21 6327 9631
European Call Center	[phone]	France	+33	1 55 69 58 49
Germany	[phone]	Japan	[phone]
Latin America	[phone]	Netherlands	+31	157 505 000
Singapore	[phone]	South Africa	+27	11 777 7555
United Kingdom	[phone]	Sweden	+46	85 853 6551

1.3Return Procedure

Please contact Welch Allyn® Customer Care at [phone] before returning a Model 690 or 692 Thermometer to the factory for service.

If you are authorized to return a thermometer to Welch Allyn:

1.Contact Welch Allyn and request a Return Material Authorization Number (RMA).

2.Repackage the thermometer carefully in its original box or any sturdy carton with enough packing material to prevent damage. List the RMA # on the shipping label, along with the authorized service center address listed in Section 1.2, Technical Support and Service Centers.

3.Include a note that describes the problem, RMA number, return address, contact name, telephone number, and any other necessary information. Ship the thermometer to the authorized service center nearest you. See Section 1.2, Technical Support and Service Centers.

1.4Safety and Warnings

•In order to obtain accurate and reliable temperature results and ensure patient safety, it is important that this manual is read thoroughly prior to using the instrument. If you have any technical or clinical questions concerning the thermometer’s use and/or care, please contact the Welch Allyn Customer Service Department.

2	71221-0000 Rev. G

•Use single-use Welch Allyn disposable probe covers to limit patient cross-contamination. The use of any other probe cover may produce temperature measurement errors or result in inaccurate readings.

•Do not take a patient’s temperature without using a Welch Allyn disposable probe cover. Doing so can cause patient discomfort, patient cross contamination, and erroneous temperature readings.

•Long-term continuous monitoring beyond three to five minutes is not recommended in any mode.

•Biting the probe tip while taking a temperature may result in damage to the probe.

•Oral/axillary probes (blue ejection button at top of probe) and blue oral/axillary removable probe wells are used for taking oral and axillary temperatures only. Rectal probes (red ejection button) and red rectal removable probe wells are used for taking rectal temperatures only. Use of the probe at the wrong site will result in temperature errors. Use of the incorrect removable probe well could result in patient cross contamination.

•To ensure patient safety and temperature measurement accuracy, use only accessories and supplies recommended or supplied by Welch Allyn.

•Equipment is not suitable for use in the presence of a flammable anesthetic mixture with air or with oxygen or nitrous oxide.

•The thermometer case, connectors, and probe are not waterproof. Do not immerse or drip fluids on these items. Should this occur, dry the device with warm air. Check all operating functions for proper operation.

•Do not take an axillary temperature through patient’s clothing. Direct probe cover to skin contact is required.

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•The Welch Allyn SureTemp Plus thermometer consists of high quality precision parts. Protect it from severe impact and shock. A qualified service technician must check any SureTemp Plus thermometer which is dropped or damaged to ensure proper operation prior to further use. Do not use the thermometer if you notice any signs of damage to the probe or instrument. Contact the Welch Allyn Customer Service Department for assistance.

•Welch Allyn recommends that batteries are removed for long term storage since alkaline batteries can deteriorate and leak over extended periods of time, and possibly cause damage to the thermometer.

•Do not autoclave. Please note the cleaning procedures described on page 14 of this manual.

•Do not use this instrument for any purpose other than that specified in this manual. Doing so will invalidate the instrument’s warranty.

•This thermometer complies with current required standards for electromagnetic interference and should not present a problem to other equipment nor is it effected by other devices. As a precaution, avoid using this device in close proximity to other equipment.

1.5Classifications

Type of protection against electric shock:	Internally powered equipment
Degree of protection against	Type BF applied part
electric shock:
Degree of protection against	Not protected
ingress of liquids:
Degree of safety in the	Equipment not suitable for use with
presence of flammable	flammable anesthetics
anesthetics:
Mode of operation:	Continuous

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2.Operating Characteristics

2.1Basic System Description

The Welch Allyn® SureTemp® Plus Model 690 and 692 thermometers are portable electronic thermistor thermometers. Users can measure a patient's temperature in the oral, axillary, and rectal body sites of adult, pediatric, and newborn patients.

Probe

Thermometer

LCD Display

Celsius/Fahrenheit Toggle

Button

Pulse Timer Button (M692 only)

Recall Button

Mode Selection Button

Probe Cover Ejection Button

Box of Probe Covers

Removable Probe Well

Latching Probe

Connector

Battery Door/Probe

Cover Storage

Holder

Figure 1: Model 692 Thermometer

The thermometer consists of six main components: the instrument, the probe, the removable probe well, the probe cover, the batteries, and the wall mount.

2.1.1 Instrument

The instrument includes a removable probe well and detachable probe.

2.1.2 Probe

The detachable probes are available in short (standard) or long cord versions and include a mechanical probe cover ejection mechanism, which is triggered by the user through a simple finger press. The probes are designed for easy exchange in the clinical environment.

•The short (standard) coiled cord probe stretches to approximately 4' and has a retracted length of approximately 10".

•The long version stretches to approximately 9’ and has a retracted length of approximately 28".

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Four probe types are available and interchangeable on the thermometer:

1.A blue Oral/Axillary probe with a short (standard) coiled cord

2.A red Rectal probe with a short (standard) coiled cord

3.A blue Oral/Axillary probe with a long coiled cord

4.A red Rectal probe with a long coiled cord

2.1.3 Probe well

This unit has a removable probe well to allow for ease of cleaning and replacement. The blue probe well is used with Oral and Axillary probes, and the red probe well is used with Rectal probes.

2.1.4 Probe covers

The SureTemp® Plus Thermometers must use the standard Welch Allyn® thermistor probe

covers, Part No. 05031. The probe covers are compatible across all Welch Allyn® thermistorbased thermometers.

2.1.5 Batteries

The Model 690 and 692 thermometers use three standard alkaline AA batteries, which provide longer life than standard AA batteries. No battery charging is available. The thermometer display will indicate when the batteries need replacement.

2.1.6 Wall Mount

The wall holder is easily secured to a wall. A locking mechanism with a removable key for securing the instrument is standard on the Model 692 Thermometer and is available as an option for the Model 690. Through the use of available long cord probes, the thermometer may be used without removing it from the wall holder.

6	71221-0000 Rev. G