Campbell Scientific CR3000 Micrologger - Manual (Page 43)

Section 4. Quickstart Tutorial
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4.1.5 SDM Channels
SDM (Serial Device for Measurement) devices expand the input and output
capacity of the CR3000. Brief descriptions of SDM device capabilities are found
in the appendix Sensors and Peripherals
.
These devices connect to the CR3000
through C3ports SDM-C1, SDM-C2, and SDM-C3.
4.1.6 Input Expansion Modules
Modules are available from Campbell Scientific to expand the number of input
and digital I/O ports on the CR3000. The appendix Digital I/O (Control Port)
Expansion
(p. 565)
lists available modules.
4.2 Hands-On: Measuring a Thermocouple
This tutorial is designed to illustrate the function of the CR3000. During the
exercise, the following items will be described:
• Attaching a thermocouple to analog differential terminals
• Creating a program for the CR3000
• Making a simple thermocouple measurement
• Sending data from the CR3000 to a PC
• Viewing the data from the CR3000
4.2.1 What You Will Need
The following items are needed to complete this exercise:
• Campbell Scientific CR3000 datalogger
• Campbell Scientific PS100 12 Vdc power supply (or compatible power
supply) with red and black wire leads.
• Thermocouple (included with the CR3000)
• Personal Computer (PC) with an available RS-232 serial port (a USB-to-RS-
232 cable may be used if an RS-232 port is not available).
• RS-232 cable (included with the CR3000).
• PC200W software. This software is available on the Campbell Scientific
ResourceDVD or at www.campbellsci.com.
Note If the PC is to be connected to the RS-232 port for an extended period, use
the Campbell Scientific SC32B interface to provide optical isolation. This protects
low level analog measurements from outside interference.