Welch Allyn SureTemp 670 Specifiche

SureTemp®Model 678 & Model 679 ThermometerTechnical ManualThermo Menu678 Operation Manual679 Operation Manual679V Operation Manual

Technical Manual1-2 Welch-Allyn, Inc.Batteries The Model 678 and Model 679 thermometers use three standardalkaline “AA” cells. These batteries are re

Operational CharacteristicsSureTemp® Model 678/SureTemp® Model 679 1-3Self TestsInstrument Reset/Self TestsIf a problem is reported with an instrument

Technical Manual1-4 Welch-Allyn, Inc.Probe Warmer Circuit Self TestsProper instrument functionality should be verified first as described in the Instr

Operational CharacteristicsSureTemp® Model 678/SureTemp® Model 679 1-5Normal ModeAfter instrument and probe warmer self tests, the system is ready for

Technical Manual1-6 Welch-Allyn, Inc.Monitor ModeThe instrument can be placed in Monitor mode by pressing and holding the Modeswitch for two seconds a

Operational CharacteristicsSureTemp® Model 678/SureTemp® Model 679 1-7F/C ConversionWhen a final temperature is displayed (in Normal, Recall, or Monit

Technical Manual1-8 Welch-Allyn, Inc.If you cannot enter the Biotech mode, refer to Biotech Mode Problems in theTroubleshooting section.Function Setti

Operational CharacteristicsSureTemp® Model 678/SureTemp® Model 679 1-96. Instant Anti-TheftAudio Alarm System(Model 678 only)The user can select an an

Technical Manual1-10 Welch-Allyn, Inc.

SureTemp® Model 678/SureTemp® Model 679 2-12. PREVENTIVE MAINTENANCEThe following preventive maintenance is recommended to maximize uninterruptedservi

© 1997 by Welch Allyn, Inc. All rights reserved. No part of this manual may bereproduced or transmitted in any form or by any means, electronic orme

Technical Manual2-2 Welch-Allyn, Inc.This type of sterilization may cause some hazing of glossy plastic surfaces and shouldbe used only when absolutel

SureTemp® Model 678/SureTemp® Model 679 3-13. CALIBRATION TESTINGThe Calibration Key provides a convenient means of testing the thermometer.Calibratio

Technical Manual3-2 Welch-Allyn, Inc.

SureTemp® Model 678/SureTemp® Model 679 4-14. THEORY OF OPERATIONTechnical OverviewThe heart of the Model 678 and Model 679 is comprised of two integ

Technical Manual4-2 Welch-Allyn, Inc.Probe EnhancementsThe Model 678 and Model 679 thermometers have the capability to detect probe type -oral / axill

Theory of OperationSureTemp® Model 678/SureTemp® Model 679 4-3The shape of the rising temperature curve is monitored and the best fit to a curve isfou

Technical Manual4-4 Welch-Allyn, Inc.Reset/Self TestsUpon battery installation, (assuming that the electronics have been dischargedsufficiently by pre

Theory of OperationSureTemp® Model 678/SureTemp® Model 679 4-5In effect, this is a single slope converter which measures the time constant of themeasu

Technical Manual4-6 Welch-Allyn, Inc.Q4 and Q5 and the base resistors R15 and R30 form the level shifter and drive circuitfor the fixed end of the tim

Theory of OperationSureTemp® Model 678/SureTemp® Model 679 4-7Circuit OperationR10, R11 (both 1 MΩ pullup resistors to reduce battery drain), J1-F(PRO

SureTemp® Model 678/SureTemp® Model 679 iTABLE OF CONTENTSTABLE OF CONTENTS...

Technical Manual4-8 Welch-Allyn, Inc.Circuit OperationThe warmer circuitry consists of Q5, Q13, Q14, C1, C2, L1, D1, R1, R2, R3, R4, R5,R31, R32, and

Theory of OperationSureTemp® Model 678/SureTemp® Model 679 4-9Probe SwitchWhen the probe has been inserted in the probe holder, the probe switch (S4)

Technical Manual4-10 Welch-Allyn, Inc.

SureTemp® Model 678/SureTemp® Model 679 5-15. TROUBLESHOOTINGMany thermometer operational parameters can be tested for proper operation beforethe unit

Technical Manual5-2 Welch-Allyn, Inc.70898-0000AInstrument circuitry error codes are listed in the table below.CLASS ERR NUM SELF-TEST DESCRIPTIONProb

TroubleshootingSureTemp® Model 678/SureTemp® Model 679 5-3Troubleshooting TableSYMPTOM POSSIBLE CAUSE PROCEDURENo operation Dead batteries, no batteri

Technical Manual5-4 Welch-Allyn, Inc.70898-0000ATroubleshooting Table (continued)SYMPTOM POSSIBLE CAUSE PROCEDUREDisplay problems(continued)Cracked LC

TroubleshootingSureTemp® Model 678/SureTemp® Model 679 5-5Troubleshooting Table (continued)SYMPTOM POSSIBLE CAUSE PROCEDUREProbe: Wrong typedisplayed

Technical Manual5-6 Welch-Allyn, Inc.70898-0000ATroubleshooting Table (continued)SYMPTOM POSSIBLE CAUSE PROCEDUREBattery Life Problems Excessive alarm

TroubleshootingSureTemp® Model 678/SureTemp® Model 679 5-7Troubleshooting Table (continued)SYMPTOM POSSIBLE CAUSE PROCEDUREMonitor modetemperature rea

ii Welch-Allyn, Inc.4. THEORY OF OPERATION... 4-1Technica

Technical Manual5-8 Welch-Allyn, Inc.70898-0000AField Serviceable RepairsRepairs are considered field serviceable if the repair will not alter the cal

TroubleshootingSureTemp® Model 678/SureTemp® Model 679 5-9Model 678/679 Replacement PartsPart Number Description25228-0000 (678 Only) SWITCH ARRAY, M6

Technical Manual5-10 Welch-Allyn, Inc.70898-0000AReplacement Parts-Circuit Board AssembliesPartNumberDescription Reference Designator21001-0011 PCA MA

TroubleshootingSureTemp® Model 678/SureTemp® Model 679 5-11Part Number Description Reference Designator21001-1010 PCA, MAIN, M678 F/C W/BCKLGHT25229-0

Technical Manual5-12 Welch-Allyn, Inc.70898-0000AThermometer DisassemblyPlease note that if your thermometer is within the warranty period, you should

TroubleshootingSureTemp® Model 678/SureTemp® Model 679 5-13Figure 7 - Thermometer Assembly Drawing1 Printed Circuit Assy. 7 Battery 3 “AA” 13 O rings

Technical Manual5-14 Welch-Allyn, Inc.70898-0000AFigure 8 - Main PCANotes: Unless otherwise specified:1. Maximum lead protrusion after trimming to be

TroubleshootingSureTemp® Model 678/SureTemp® Model 679 5-15Notes: Unless otherwise specified:1. Refer to manufacturing procedures 97033-0000, 97034-0

1 2 3 4 5 6 7 8ABCD87654321DCBATitleNumber RevisionSizeOrcad DDate: 7-Apr-2000 Sheet of File: I:\Documentation\..\55105C.SCH Drawn By:CONFIDENTIAL

Technical Manual5-16 Welch-Allyn, Inc.70898-0000A

SureTemp® Model 678/SureTemp® Model 679 iiiLIST OF FIGURESFIGURE 1 - THERMOMETER DIAGRAM...

iv Welch-Allyn, Inc.WARRANTY3-YEAR LIMITED WARRANTY ON NEW M678 AND ON M679 ONE PER ROOMINSTRUMENTS. 1-YEAR LIMITED WARRANTY ON NEW M679 INSTRUMENT:In

SureTemp® Model 678/SureTemp® Model 679 vSPECIFICATIONS• Case Dimensions(nominal):2.25 in. x 3 in. x 7 in5.7 cm x 7.6 cm. x 17.8 cm• Case Material:ABS

vi Welch-Allyn, Inc.TERMINOLOGYMany standard abbreviations are used in this Technical Manual.Abbreviation DefinitionPCB printed circuit board(the boar

SureTemp® Model 678/SureTemp® Model 679 1-11. OPERATIONAL CHARACTERISTICSNote: This manual describes both the Model 678 and the Model 679 thermometer