This product is not available for new orders. We recommend ordering: CR3000.
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Overview
The 21X Micrologger featured a self-contained package that had an integrated power supply, keyboard, and display. Its on-board power supply contained alkaline batteries.
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Detailed Description
The 21X Micrologger featured a self-contained package that had an integrated power supply, keyboard, and display. Its on-board power supply contained alkaline batteries.
The 21X provided 8 differential (16 single-ended) analog input channels, 4 switched excitation outputs, 2 continuous analog outputs, 6 control ports, and 4 pulse counting channels. It had a CS I/O port that was labeled Serial I/O; an SC32A or SC32B was required for communications with a PC. The 21X stored up to 19,296 data points in its internal memory.
Internal software PROMs (Firmware), ac rejection, and temperature testing were ordered at time of purchase. The 21X needed three PROMs for any Windows software to communicate with it. Two PROMs had only three *B windows; three PROMS had nine *B windows. For descriptions of PROMs, see Ordering Info.
Compatibility
A typical field-based 21X system consisted of:
• 21X Micrologger
• Weatherproof Enclosure
• Communications Peripheral(s)
• Programming and Communications Software
• Sensors
Specifications
| -NOTE- | Note: Additional specifications are listed in the 21X Specifications Sheet. |
| Analog Input Channels | 8 differential (16 single-ended) |
| Switched Excitation Outputs | 4 |
| Continuous Analog Outputs | 2 |
| Control Ports | 6 |
| Pulse Count Channels | 4 |
| Memory | Stores 19,296 data points in internal memory. |
Documents
Manuals
Technical Papers
Frequently Asked Questions
Number of FAQs related to 21X: 1
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A practical maximum is to connect one multiplexer per every two control terminals on the data logger. Control terminals can be shared between multiplexers to increase the number of connected multiplexers. Sharing terminals, however, requires more complex wiring and programming. Users who would like to connect more than one multiplexer per every two control terminals are advised to contact a sales or support engineer at Campbell Scientific for assistance.
Case Studies
The Long-Term Ecological Research (LTER) program, sponsored by the National Science Foundation, monitors ecological phenomena......read more