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Overview
The 25998 is a version of the CR206X intended for OEMs. It does not have a label so that the OEM can attach their own branding. The 25998 consists of a small, low-cost unit that can be used as a wireless sensor or simple data logger. It includes an internal 900 MHz spread-spectrum radio for transmitting data to another CR206(X), an RF401 radio, an RF430 radio, or an AVW206 interface. The 900 MHz frequency is used in the US and Canada.
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Detailed Description
The 25998 is a version of the CR206X intended for OEMs. It does not have a label so that the OEM can attach their own branding.
The CR206X is a small, low-cost device that includes an internal 900 MHz spread-spectrum radio for transmitting data to another CR206(X), an RF401 radio, an RF430 radio, or an AVW206 interface. The 900 MHz frequency is used in the US and Canada.
The CR206X provides stand-alone operation in harsh, remote environments. It reads input from one or two sensors, then transmits its data wirelessly via its internal radio. Multiple CR206Xs can be configured as a network or units can be deployed individually.
The CR206X can be used in a wireless sensor network. Wireless sensor networks are appealing because they are often more economical than trenching, laying conduit, and pulling wire. When used as a wireless sensor, the CR206X measures the sensors attached to it, then transmits its data wirelessly via its spread-spectrum radio to a master data logger. The master data logger must support the PakBus communication protocol (e.g., CR800, CR850, CR1000, CR3000).
The CR206X datalogger can measure a variety of sensors including SDI-12 sensors and 4 to 20 mA sensors. However, the CR206X does not make differential measurements and is not compatible with SDM devices, multiplexers, or thermocouples (refer to the Compatibility tab for compatible sensors, peripherals, and software). Recalibration services are not offered for the CR206X dataloggers.
Specifications
| Internal Spread-Spectrum Radio Frequency | 900 MHz |
| Current Drain |
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| A/D Bits | 12 |
| Maximum Scan Rate | Once per second |
| Analog Channels | 5 single-ended (no differential), individually configured |
| Analog Voltage Range | 0 to 2500 mV |
| Analog Voltage Accuracy | ±(0.25% of reading +1.2 mV off set) at -40° to +50°C |
| Measurement Resolution | 0.6 mV |
| Switched Excitation Channels | 2 voltage |
| Switched Battery Port | 1 |
| Pulse Count Channels | 2 |
| Control Ports | 2 |
| Memory |
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| Communication Ports | 1 RS-232 |
| Protocols Supported | PakBus (leaf node only), SDI-12 |
| Warranty | 3 years |
Compatibility
Sensors
The CR206X can measure a variety of sensors including SDI-12 sensors and 4 to 20 mA sensors. Our CS625 Reflectometer and 109 Thermistor were specifically developed for our CR200(X)-series dataloggers. Other compatible sensors include wind sets, tipping buckets, and barometers. For a complete list of compatible sensors, see the CR200X-series brochure.
The CR206X cannot make differential measurements and is not compatible with thermocouples, our geographic position sensor, fuel moisture/temperature probe, and soil heat flux sensors.
Measurement & Control Peripherals
The CR206X is not compatible with SDM devices and multiplexers.
Communications
The CR206X can communicate with a PC via direct connect, NL201 Ethernet interface, MD485 multidrop modem, and digital cellular modems. Data can be viewed on the CD295 DataView II display, Archer-PCon Field PC, or a user-supplied PDA (PConnect or PConnectCE software required).
The CR206X's internal spread spectrum radio can transmit data to other CR206(X) loggers, RF401 radios, RF430 radios, or the AVW206 interface. Certain CR206X settings must match the radio's settings for communications between the data logger and radio to be successful. The factory default settings of these devices might not match; therefore, they may need to be reconfigured before communications can take place. Refer to the Quick Reference Guide for Setting Up RF401-to-CR206(X) Communications application note at right for more information.
If the CR206X is in the transparent mode, it can communicate with the retired CR205 loggers or RF400 radios.
Enclosures
Applications with minimal power requirements can use the ENC200 enclosure to house the data logger and the #16869 sealed rechargeable battery. The ENC200 cannot house a barometer or a battery that is larger than the #16869. However, an ENC10/12 or ENC12/14 enclosure is adequate for most CR206X-based systems.
Power Supplies
When connected to the on-board charging circuit, the sealed rechargeable battery should be 7 A h or smaller. Using larger batteries with the data logger's built-in charger may result in excessive PC board heating. This is especially a concern when the battery is deeply discharged or failing with a shorted cell. Campbell Scientific also recommends that solar panels be 10 W or less and wall chargers be 1 A or smaller.
Software
The CR206X is compatible with the following software packages:
- Short Cut
- PC200W
- PC400 (version 1.0 or higher)
- LoggerNet (version 2.1 or higher)
- PConnect (version 3.0 or higher)
- PConnectCE (version 2.0 or higher)
- VisualWeather (version 2 or higher)
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