Campbell Scientific HFT3 REBS User Manual

INSTRUCTION MANUAL

HFT3 Soil Heat Flux Plate

Revision: 10/03

Copyright (c) 1987-2003

Campbell Scientific, Inc.

Warranty and Assistance

The HFT3 SOIL HEAT FLUX PLATE is warranted by CAMPBELL
SCIENTIFIC, INC. to be free from defects in materials and workmanship under
normal use and ser vice for twelve (1 2) months from date of shipment unless
specified otherwise. Batteries have no warranty. CAMPBELL SCIENTIFIC,
INC.'s obligation under this warranty is limited to repairing or replacing (at
CAMPBELL SCIENTIFIC, INC.'s option) defective products. The customer
shall assume all costs of removing, reinstalling, and shipping defective products
to CAMPBELL SCIENTIFIC, INC. CAMPBELL SCIENTIFIC, INC. will
return such products by surface carrier prepaid. This warranty shall not apply
to any CAMPBELL SCIENTIFIC, INC. products which have been subjected to
modification, misuse, neglect, accidents of nature, or shipping damage. This
warranty is in lieu of all other warranties, expressed or implied, including
warranties of merchantability or fitness for a particular purpose. CAMPBELL
SCIENTIFIC, INC. is not liable for special, indirect, incidental, or
consequential damages.

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.ca mpbellsci.co m to
determine which Campbell Scientific company serves your country. To obtain
a Returned Materials Authorization (RMA), contact CAMPBELL
SCIENTIFIC, INC., phone [phone]. After an applications 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

CAMPBELL SCIENTIFIC, INC. does not accept collect calls.

HFT3 Table of Contents

PDF viewers note: These page numbers refer to the printed version of this document. Use
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1. General Description ....................................................1

2. Specifications .............................................................1

3. Installation...................................................................2

4. Wiring ..........................................................................3

5. Example Programs .....................................................4

6. Soil Heat Flux and Storage.........................................5

7. Maintenance................................................................6

8. References ..................................................................6

Figures

1. Placement of Heat Flux Plates....................................................................2

2. HFT3 Plate to Datalogger Connections......................................................3

Tables

1. Datalogger Connections for a Single-Ended Measurement.........................3

2. Datalogger Connections for a Differential Measurement............................3

3. Wiring for Example 1.................................................................................4

4. Wiring for Example 2.................................................................................4

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