Campbell Scientific 4WPB10 User Manual

4WPB100, 4WPB1K PRT Bridge

Terminal Input Modules

Revision: 12/06

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Copyright © 1996-2006

Campbell Scientific, Inc.

Warranty and Assistance

The 4WPB100, 4WPB1K PRT BRIDGE TERMINAL INPUT MOUDLES
are warranted by CAMPBELL SCIENTIFIC, INC. to be free from defects in
materials and workmanship under normal use and service for twelve (12)
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.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
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.

4WPB100, 4WPB1K Table of Contents

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

1. Function........................................................................1

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

3. Wiring............................................................................2

4. Programming Examples..............................................3

4.1 CR10(X) ...................................................................................................5

4.2 21X...........................................................................................................5

4.3 CR7...........................................................................................................6

4.4 CR9000X..................................................................................................6

4.5 CR1000.....................................................................................................7

5. PRT in 4 Wire Half Bridge ...........................................7

Figures

Tables

5.1 Excitation Voltage....................................................................................8

5.2 Calibrating a PRT.....................................................................................8

1-1. Terminal Input Module ...........................................................................1

2-1. Circuit Schematic....................................................................................2

3-1. Wiring for Example Programs ................................................................2

3-1. 4WPB100/4WPB1K Connections to Campbell Scientific Dataloggers..3
4-1. Excitation Voltage for 100 Ohm PRT in 4WPB100 Based on

Maximum Temperature and Input Voltage Range...............................3

4-2. Excitation Voltage for 1000 Ohm PRT in 4WPB1000 Based on

Maximum Temperature and Input Voltage Range...............................4

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4WPB100, 4WPB1K PRT Bridge Terminal Input Modules

1. Function

Terminal input modules connect directly to the datalogger's input terminals to
provide completion resistors for resistive bridge measurements, voltage
dividers, and precision current shunts. The 4WPB100 and 4WPB1K are used
to provide completion resistors for 4 wire half bridge measurements of 100
Ohm and 1 killohm Platinum Resistance Thermometer (PRT), respectively.

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2. Specifications

FIGURE 1-1. Terminal Input Module

Current limiting 10 kOhm Resistor
Tolerance @ 25 °C ±5%
Power rating 0.25 W

Completion Resistor
Tolerance @ 25 °C ±0.01%
Temperature coefficient
0-60 °C

-55-125 °C
Power rating 0.25 W

4 ppm/°C
8 ppm/°C

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