Campbell Scientific CR3000 CR3000 Micrologger - Page 43
Hands-On: Measuring a Thermocouple
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Section 4. Quickstart Tutorial 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. 43
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