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Instruction Manual
Model 4700
VW Temperature Gage
No part of this instruction manual may be reproduced, by any means, without the written consent of Geokon, Inc.
The information contained herein is believed to be accurate and reliable. However, Geokon, Inc. assumes no responsibility for
errors, omissions, or misinterpretation. The information herein is subject to change without notification.
Copyright © 1984-2018 by Geokon, Inc.
(Doc Rev H, 03/01/18)
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Summary of Contents for Geokon 4700
- Page 1 VW Temperature Gage No part of this instruction manual may be reproduced, by any means, without the written consent of Geokon, Inc. The information contained herein is believed to be accurate and reliable. However, Geokon, Inc. assumes no responsibility for errors, omissions, or misinterpretation.
- Page 3 Upon examination by Geokon, if the unit is found to be defective, it will be repaired or replaced at no charge. However, the WARRANTY is VOID if the unit shows evidence of having been tampered with...
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Page 4: Table Of Contents
TABLE of CONTENTS 1. THEORY OF OPERATION ..........................1 2. INSTALLATION ..............................1 3. READOUT PROCEDURES ..........................1 4. DATA REDUCTION .............................. 2 5. TROUBLE SHOOTING ............................2 APPENDIX A. SPECIFICATIONS .......................... 2 APPENDIX B. TYPICAL CALIBRATION SHEET ....................3 APPENDIX C. -
Page 5: Theory Of Operation
The thermal response of the Model 4700 is quite slow; it is not suitable for the measurement of rapidly changing temperatures. (See Appendix A for details.) 2. -
Page 6: Data Reduction
4. DATA REDUCTION The temperature (T) is given by the formula: T = G (R –R ) in degrees Centigrade Equation 1 - Temperature Where; is the initial reading on channel B at 0 °C (from the calibration sheet). is the subsequent reading on channel B G is the gage factor found on the calibration sheet. -
Page 7: Appendix B. Typical Calibration Sheet
APPENDIX B. TYPICAL CALIBRATION SHEET Figure 1 - Typical Calibration Sheet... -
Page 8: Appendix C. Thermistor Temperature Derivation
APPENDIX C. THERMISTOR TEMPERATURE DERIVATION Thermistor Type: YSI 44005, Dale #1C3001-B3, Alpha #13A3001-B3 Resistance to Temperature Equation: A+B ( LnR ) +C(LnR) -273.2 Equation 2 - Resistance to Temperature Where; T = Temperature in °C. LnR = Natural Log of Thermistor Resistance A = 1.4051 ×... -
Page 9: Appendix D. High Temperature Thermistor Linearization
APPENDIX D. HIGH TEMPERATURE THERMISTOR LINEARIZATION Resistance to Temperature Equation for US Sensor 103JL1A: A+B ( LnR ) +C(LnR) -273.2 +D(LnR) Equation 3 - High Temperature Resistance to Temperature Where; T = Temperature in °C. LnR = Natural Log of Thermistor Resistance. A = 1.127670 ×...
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