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Installation Manual
Model 3800/3810
Thermistors & Thermistor Strings
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 ©, 2009-2016 by Geokon, Inc.
(Doc Rev E, 04/07/17)
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Summary of Contents for Geokon 3800
- Page 1 Thermistors & Thermistor Strings 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.
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Page 3: Warranty Statement
13 months from date of purchase. If the unit should malfunction, it must be returned to the factory for evaluation. Upon examination by Geokon, if the unit is found to be defective, it will be repaired or replaced at no charge. - Page 5 Contents CONTENTS ............................... 1 1. INTRODUCTION ............................ 1 2. INSTALLATION ............................ 1 3. READOUT .............................. 1 4. DATALOGGER CONNECTION ....................... 1 FIGURE A‐1: THERMISTOR BRIDGE WIRING ...................... 2 TABLE B‐1: STANDARD THERMISTOR RESISTANCE VERSUS TEMPERATURE ............ 4 TABLE B‐2: HIGH TEMPERATURE THERMISTOR RESISTANCE VERSUS TEMPERATURE......... 6...
- Page 7 4. Datalogger Connection _____________________________________________________ A Multiplexer (Model 8032) is required to connect the Model 3810 Thermistor string to a Datalogger (Model 8021/8025). The Common connection of the Thermistor String limits the ability to connect the string directly to a Datalogger.
- Page 8 -CR1000/CR800 Wiring for Model 8032 reading Thermistor String in 32ch mode CR1000/CR800 Datalogger 8032 Multiplexer Description 12VDC Output Power Ground Control Port # / Reset Digital I/O Port # / Clock Analog Ground *SE# Single Ended CH# input for Thermistor *VX# Excitation VX# * NOTE: The Thermistors are read using a Single Ended Channel and Excited with one of...
- Page 9 NOTE: The DIP Switches for the 8032 Multiplexer should be set for 32 Channel mode. Each individual Thermistor is connected (with common jumper) as shown below. Multiplexer Wiring: 8032 Multiplexer Model 3800/3810 Thermistor Gage 1 Thermistor Common * Thermistor Gage 2...
- Page 10 Standard Temperature Thermistor Linearization using SteinHart-Hart Log Equation Thermistor Type: YSI 44005, Dale #1C3001-B3, Alpha #13A3001-B3 Resistance to Temperature Equation: Equation B-1: Convert Thermistor Resistance to Temperature T Temperature in C Where: LnR Natural Log of Thermistor Resistance A ...
- Page 11 High Temperature Thermistor Linearization using SteinHart-Hart Log Equation Thermistor, High Temperature Versions, Range: -80 to +200° C Accuracy: ±0.5° C) Resistance to Temperature Equation for US Sensor 103JL1A: T Temperature in C. Where; LnR Natural Log of Thermistor Resistance A ...
- Page 12 16,463 4,201 1,340 510.6 224.3 109.8 58.8 33.9 15,712 4,041 1,297 496.7 219.0 107.5 57.7 33.4 14,999 3,888 1,255 483.2 213.9 105.3 56.7 32.9 14,323 3,742 1,215 470.1 208.9 103.2 55.7 32.3 13,681 3,602 1,177 457.5 204.1 101.1 54.7 31.8 13,072 ...
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