Campbell Scientific 108-L User Manual

INSTRUCTION MANUAL

Model 108 Temperature Probe

Copyright © 1985- 2014

Campbell Scientific, Inc.

Revision: 3/14

Limited Warranty

“Products manufactured by CSI are warranted by CSI to be free from defects in
materials and workmanship under normal use and service for twelve months
from the date of shipment unless otherwise specified in the corresponding
product manual. (Product manuals are available for review online at

www.campbellsci.com.) Products not manufactured by CSI, but that are resold

by CSI, are warranted only to the limits extended by the original manufacturer.
Batteries, fine-wire thermocouples, desiccant, and other consumables have no
warranty. CSI’s obligation under this warranty is limited to repairing or
replacing (at CSI’s option) defective Products, which shall be the sole and
exclusive remedy under this warranty. The Customer assumes all costs of
removing, reinstalling, and shipping defective Products to CSI. CSI will return
such Products by surface carrier prepaid within the continental United States of
America. To all other locations, CSI will return such Products best way CIP
(port of entry) per Incoterms ® 2010. This warranty shall not apply to any
Products which have been subjected to modification, misuse, neglect, improper
service, accidents of nature, or shipping damage. This warranty is in lieu of all
other warranties, expressed or implied. The warranty for installation services
performed by CSI such as programming to customer specifications, electrical
connections to Products manufactured by CSI, and Product specific training, is
part of CSI's product warranty. CSI EXPRESSLY DISCLAIMS AND

EXCLUDES ANY IMPLIED WARRANTIES OF MERCHANTABILITY
OR FITNESS FOR A PARTICULAR PURPOSE. CSI hereby disclaims,
to the fullest extent allowed by applicable law, any and all warranties and
conditions with respect to the Products, whether express, implied or
statutory, other than those expressly provided herein.”

Assistance

Products may not be returned without prior authorization. The following
contact information is for US and international customers residing in countries
served by Campbell Scientific, Inc. directly. Affiliate companies handle
repairs for customers within their territories. Please visit

www.campbellsci.com to determine which Campbell Scientific company serves

your country.

To obtain a Returned Materials Authorization (RMA), contact CAMPBELL
SCIENTIFIC, INC., phone [phone]. After an application engineer
determines the nature of the problem, an RMA number will be issued. Please
write this number clearly on the outside of the shipping container. Campbell
Scientific’s shipping address is:

CAMPBELL SCIENTIFIC, INC.
RMA#_____
815 West 1800 North
Logan, Utah 84321-1784

For all returns, the customer must fill out a “Statement of Product Cleanliness
and Decontamination” form and comply with the requirements specified in it.
The form is available from our web site at www.campbellsci.com/repair. A
completed form must be either emailed to [e-mail] or faxed to
[phone]. Campbell Scientific is unable to process any returns until we
receive this form. If the form is not received within three days of product
receipt or is incomplete, the product will be returned to the customer at the
customer’s expense. Campbell Scientific reserves the right to refuse service on
products that were exposed to contaminants that may cause health or safety
concerns for our employees.

Table of Contents

PDF viewers: These page numbers refer to the printed version of this document. Use the
PDF reader bookmarks tab for links to specific sections.

1. Introduction ................................................................. 1

2. Cautionary Statements ............................................... 1

3. Initial Inspection ......................................................... 1

4. Quickstart .................................................................... 1

5. Overview ...................................................................... 4

6. Specifications ............................................................. 4

7. Installation ................................................................... 6

7.1 Wiring to Datalogger ............................................................................ 6

7.2 Datalogger Programming ..................................................................... 6

7.2.1 CRBasic ........................................................................................ 7

7.2.2 Edlog ............................................................................................. 7

7.3 Air Temperature Installation ................................................................ 8

7.4 Water Temperature Installation .......................................................... 10

7.5 Soil Temperature ................................................................................ 10

8. Operation ................................................................... 10

8.1 Sensor Schematic ............................................................................... 10

8.2 Measurement and Output Linearization ............................................. 10

8.3 Electrically Noisy Environments........................................................ 12

8.4 Long Cable Lengths ........................................................................... 12

9. Troubleshooting and Maintenance ......................... 13

9.1 Troubleshooting ................................................................................. 13

9.2 Maintenance ....................................................................................... 14

9.3 Calibration .......................................................................................... 14

10. Attributions and References .................................... 14

Appendices

Importing Short Cut Code ...................................... A-1

A.

A.1 Importing Short Cut Code into a Program Editor ........................... A-1

A.1.1 CRBasic Datalogger ................................................................. A-1

A.1.2 Edlog ........................................................................................ A-2

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Table of Contents

B. Example Programs .................................................. B-1

B.1 Example CRBasic Program ............................................................. B-1

B.2 Example Edlog Program .................................................................. B-1

C. Conversion of Thermistor Resistance or

Voltage Ratio to Temperature .............................. C-1

Figures

6-1. Linearization error, where error is the difference between actual

and datalogger-computed temperature. ............................................ 5

7-1. 108 and 41303-5A Radiation Shield on a tripod mast ......................... 9

7-2. 108 and 41303-5A Radiation Shield on a CM200 Series Crossarm .... 9

8-1. 108 thermistor probe schematic ......................................................... 10

Tables

7-1. Wire Color, Function, and Datalogger Connection ............................. 6

8-1. 108 Measurement Details .................................................................. 11

8-2. 108 Temperature Calculation ............................................................ 11

C-1. Voltage Ratio, Resistance, and Temperature ................................... C-1

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Model 108 Temperature Probe

1. Introduction

The 108 temperature probe uses a thermistor to measure temperature in air,
soil, and water. It is compatible with all current dataloggers except the
CR200(X) series and CR9000(X).

2. Cautionary Statements

Santoprene® rubber, which composes the black outer jacket of the 108 cable,
will support combustion in air. It is used because of its resistance to
temperature extremes, moisture, and UV degradation. It is rated as slow
burning when tested according to U.L. 94 H.B. and passes FMVSS302.
However, local fire codes may preclude its use inside buildings.

3. Initial Inspection

• Check the packaging and contents of the shipment. If damage occurred

during transport, immediately file a claim with the carrier. Contact
Campbell Scientific to facilitate repair or replacement.

4. Quickstart

• Check model information against the shipping documents to ensure the

expected products and the correct lengths of cable are received. Model
numbers are found on each product. On cables and cabled items, the
model number is usually found at the connection end of the cable. Report
any shortages immediately to Campbell Scientific.

Short Cut is an easy way to program your datalogger to measure the 108 probe
and assign datalogger wiring terminals. Use the following procedure to get
started.

1. Install Short Cut by clicking on the install file icon. Get the install file

from either www.campbellsci.com, the ResourceDVD, or find it in
installations of LoggerNet, PC200W, PC400, or RTDAQ software.

2. The Short Cut installation should place a shortcut icon on the desktop of

your computer. To open Short Cut, click on this icon.

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Model 108 Temperature Probe

3. When Short Cut opens, select New Program.

4. Select Datalogger Model and Scan Interval (default of 5 seconds is OK

for most applications). Click Next.

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Model 108 Temperature Probe

5. Under the Available Sensors and Devices list, select the Sensors |

Temperature folder. Select 108 Temperature Probe. Click to

move the selection to the Selected device window. Data defaults to degree
Celsius. This can be changed by clicking the Deg C box and selecting
Deg F, for degrees Fahrenheit, or K, for Kelvin.

6. After selecting the sensor, click at the left of the screen on Wiring

Diagram to see how the sensor is to be wired to the datalogger. The
wiring diagram can be printed out now or after more sensors are added.

7. Select any other sensors you have, and then finish the remaining Short Cut

steps to complete the program. The remaining steps are outlined in Short

Cut Help, which is accessed by clicking on Help | Contents |
Programming Steps.

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