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Overview The CR300 is a multi-purpose, compact measurement and control data logger. This small, low-cost, high-value data logger offers fast communications, low power requirements, built-in USB, and excellent analog input accuracy and resolution.

The CR300 can measure most hydrological, meteorological, environmental, and industrial sensors. It concentrates data, makes it available over varied networks, and delivers it using your preferred protocol. It also performs automated on-site or remote decision making for control and M2M communications. The CR300 is ideal for small applications requiring long-term remote monitoring and control.

The CR300 series includes Wi-Fi, cellular, or the following radio options for different regions: • CR300-RF407: US and Canada • CR300-RF412: Australia and New Zealand • CR300-RF422: Europe Note: Campbell Scientific does not recommend the CR300 for use as a PakBus router in networks with more than 50 devices. Large arrays or string variables may also reach memory limits. For such applications, a is recommended. NOTE- Additional specifications are listed in the. Operating Temperature Range • -40° to +70°C (standard) • Non-condensing environment Analog Inputs 6 single-ended or 3 differential (individually configured) Pulse Counters 8 (P_SW, P_LL, C1, C2, and SE1 to SE4) Voltage Excitation Terminals 2 (VX1, VX2) Communications Ports • USB • RS-232 Switched 12 Volt 1 terminal Digital I/O 7 terminals (C1, C2, P_SW, and SE1 to SE4) configurable for digital input and output. Includes status high/low, pulse width modulation, external interrupt, and communication functions. Exception: The SE4 terminal doesn't do external interrupt.

Input Limits -100 mV to +2500 mV Analog Voltage Accuracy • Accuracy specifications do not include sensor or measurement noise. • ±(0.04% of measurement + offset) at 0° to 40°C • ±(0.1% of measurement + offset) at -40° to +70°C ADC 24-bit Power Requirements 10 to 18 Vdc; 16 to 32 Vdc Real-Time Clock Accuracy ±1 min. Software Product Compatible Note Version 2.12 or higher Version 1.3 or higher Version 1.5 or higher Version 4.4 or higher Version 1.1 or higher Version 4.4 or higher Version 4.4 or higher Version 3.2 or higher Additional Compatibility Information Sensors With several channel types, the CR300 is compatible with nearly every available sensor.

This includes analog output voltage (0 to 2.5 V) and current (0 to 20 mA or 4 to 20 mA) sensors, thermistors, and RTDs to name a few. It is also compatible with pulse or frequency output sensors such as anemometers, rain gauges, and flow meters. CR300 dataloggers are not capable of applying reverse excitation, and they cannot be used with some conductivity or soil matric potential sensors. SDI-12, Modbus, and other serial sensors are supported with the RS-232 port and C1 and C2 as a Tx/Rx pair. The CR300 does not directly support RS-485 sensors. Measurement & Control Peripherals The CR300 is compatible with low current and voltage solid-statey relays but not with SDM or CDM devices.

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