The CR211X is a small, low-cost datalogger that includes an internal 922 MHz spread-spectrum radio for transmitting data to another CR211(X), an RF411 radio, or an RF431 radio. The 922 MHz frequency is used in Australia and Israel.
The CR211X 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 CR211Xs can be configured as a network, or units can be deployed individually.Read More
For new projects, the CR300-series dataloggers are recommended instead of the CR200X-series dataloggers. The CR300-series builds on the successful features of the CR200X-series dataloggers, while adding new features. The CR200X-series dataloggers will continue to be available for customers with existing CR200X networks until 16 January 2018. Refer to the CR200X-Series Datalogger Discontinuation Notice for details.
The CR211X 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 CR211X measures the sensors attached to it, then transmits its data wirelessly via its spread-spectrum radio to a master datalogger. The master datalogger must support the PakBus communication protocol (e.g., CR800, CR850, CR1000, CR3000). For more information on how to configure a PakBus system, please read our PakBus Networking Guide.
The CR211X has several input channels for measuring a variety of sensors. Gas discharge tubes provide rugged electrostatic discharge protection for the inputs.
The CR211X does not make differential measurements and is not compatible with SDM devices, multiplexers, or thermocouples. (Refer to the Compatibility section on the web page for compatible sensors, peripherals, and software.) Recalibration services are not offered for the CR211X datalogger.
|-NOTE-||Note: Additional specifications are listed in the CR200X-Series Specifications Sheet.|
|Internal Spread-Spectrum Radio Operating Frequency Range||920 to 928 MHz|
Older CR211X dataloggers (serial # < 19143) have 100 mW radios.
|Transmitter Power Output||100 mW|
|Maximum Scan Rate||1 Hz|
|Pulse Count Channels||2|
|Switched Excitation Channels||2 voltage|
|Communication Ports||1 RS-232|
|Switched Battery Port||1|
|Input Voltage Range||0 to 2500 mV|
|Analog Voltage Accuracy||±(0.25% of reading + (1.2 mV)x(offset)) at -40° to +50°C|
|Analog Voltage Resolution||0.6 mV|
|Operating Temperature||-40° to +50°C|
|Power Requirements||7 to 16 Vdc|
|Typical Current Drain||
|Protocols Supported||PakBus (leaf node only), SDI-12 (@ -40° to +50°C)|
|Dimensions||14.0 x 7.6 x 4.8 cm (5.5 x 3.0 x 1.9 in.)|
|Weight||271 g (9.5 oz)|
|Final Storage||512 kB of flash memory for approximately 125,000 data points|
|Operating System||106 kB of flash memory|
|Intermediate Storage||8 kB of SRAM for communication buffers, calculations, variables, etc.|
The CR211X can communicate with a PC via direct connect, NL201 Network Link Interface, NL240 Wi-Fi Network Link, MD485 multidrop modem, and digital cellular modems. Data can be viewed on an iOS device, an Android device, CD295 DataView II Display, or a user-supplied PDA. To use an iOS or Android device, go to the Apple Store or Google Play and download our LoggerLink Mobile Apps free of charge. User-supplied PDAs require either PConnect or PConnectCE software.
The CR211X's internal spread spectrum radio can transmit data to other CR211(X) loggers, RF411 radios, or RF431 radios. Certain CR211X settings must match the radio's settings for communications between the datalogger 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.
If the CR211X is in the transparent mode, it can communicate with the retired CR210 loggers or RF410 radios.
Campbell Scientific’s SDM devices and multiplexers are not supported.
The CR211X can measure a variety of sensors including SDI-12 sensors and 4 to 20 mA sensors. It cannot make differential measurements and is not compatible with the freezing-rain/ice, fuel moisture/temperature, geographic position, present weather, soil heat flux, soil matric water potential, and strain sensors listed on our price lists.
The currently available sensors that the CR211X can measure are shown below:
Applications with minimal power requirements can use the ENC200 enclosure to house the datalogger 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 CR211X-based systems.
The CR211X uses an external power supply and has a built-in regulator. When connected to the on-board charging circuit, the sealed rechargeable battery should be 7 A h or smaller. Using larger batteries with the datalogger'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.
The CR211X is compatible with the following software packages:
Newer dataloggers with 250 mW radios must use OS 3 or higher for their datalogger operating system.
Execution of this download installs the Operating System and Compiler on your computer for the following dataloggers:CR200X, CR206X, CR211X, CR216X and CR295X. It also updates the support files for the CRBasic Editor.
Note: Newer CR206X dataloggers (serial # ≥ 19122) and newer CR211X dataloggers (serial # ≥ 19143) have 250 mW radios that must use OS 3 or higher for their datalogger operating system.
Number of FAQs related to CR211X: 40
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Not directly. If the CS15-L is connected to a CR200(X) datalogger, the datalogger can take the ac measurement and control a solid-state relay based on some threshold within the datalogger program. The solid-state relay can then control other relays, solenoids, or motor starters. (Use of a solid-state relay is preferred because the datalogger can trigger it with a small 5 Vdc mA signal.) For more information, see the “Measurement and Control Peripherals” section of the operator’s manual.
Yes. The BMP5 Direct SDK can communicate with the datalogger as long as two conditions are met:
Current dataloggers compatible with the BMP5 Direct SDK are the CR200X-series, CR1000, CR3000, CR800, and CR850.
Retired compatible dataloggers include the CR10X-PB, CR23X-PB, and CR510-PB. These dataloggers must have the optional PakBus operating system installed, which is available on the Downloads page of our website.
Yes. The simplest method is to use conditional program statements that execute most of the code based on time. For example, the data could be scheduled to log at 6 a.m. and finish at 8 p.m. using CRBasic instructions such as IfTime(). Another option is to use an IfThen/EndIf construction that does a logical test of light-level measurements based on a light sensor. An additional option is to use calculated sunrise and sunset times along with a combination of RealTime() and Case instructions.
For more information, see the “Decisions, Decisions, Decisions…” article.
Technically, the SRM-5A is compatible with the CR200X-series dataloggers, but it is more complicated to use it with these dataloggers. To use a SRM-5A with a CR200X-series datalogger, the SRM-5A must be in the DTE position on the station modem. In addition, user-supplied adapters and gender changers are needed to complete the connections between the SRM-5A and the RS-232 port of the datalogger. Contact Campbell Scientific for more information.
The CR200X-series and the retired CR200-series dataloggers are NOT compatible with SDMs or multiplexers. If more channels are needed or may be needed in the future, consider purchasing a CR800, CR850, or CR1000 instead.
If small amounts of data are transferred per transmission, it will not be a problem. Larger amounts of data can overrun buffers in the modem, causing lost data. In that situation, lower the baud rate on the datalogger to avoid the issue.
The maximum cable length depends on the interface being used.
A datalogger can be programmed to initiate data transfer by using the SendVariables() or ModemCallback() instruction in CRBasic.
NOTE: These instructions are not supported in the CR200X operating system.