The CR6 measurement and control datalogger is a powerful core component for your data-acquisition system. It combines the best features of the CR range of dataloggers with added faster communication, low power requirements, built in USB, compact size, and improved analogue input accuracy and resolution. The CR6 also introduces the new universal (U) terminal, an ingenious way to allow virtually any sensor, analogue, digital, or smart, to be connected to any U terminal. It is also capable of making static vibrating-wire measurements.
- CPU: 32 bit with hardware FPU, running at 100 MHz
- Internal Memory: 4 MB SRAM for data storage and optional removable microSD for up to 16 GB, 1 MB flash for program, 6 MB flash for OS
- Micro SD Drive for extended data storage up to 16 GB
- Clock Accuracy: ±3 min per year, optional GPS correction to 10 µs
- USB micro B for direct connection to PC (limited power source during configuration) , 2.0 full speed, 12 Mbps
- 10/100 Ethernet RJ-45 for LAN connection
- CS I/O port for connection to Campbell Scientific modems and displays
- CPI port for terminal expansion using Campbell Distributed modules (CDM)
- Battery terminal pair for regulated 12 V power input or rechargeable 12 V VRLA for UPS mode
- Charge terminal pair for 16 to 32 V from dc power converter or 12 or 24 V solar panel
- Two switched 12 V terminals for powering sensors or communication devices, 1100 mA @ 20°C
- Continuous 12 V terminal
- Maximum Multiplexed Analog Measurement Rate: 354 Hz (2.8 ms)
- Best Analog Accuracy: ±(0.03% of reading + 3 µV), 0° to 40°C
- Best Effective Resolution: 50 nV (±200 mV range, differential measurement, input reversal, 5 Hz Fnotch)
- Weight: 0.42 kg (0.92 lb)
- Dimensions: 20.3 x 10.2 x 6.1 cm (8.0 x 4.0 x 2.4 in)
- RoHS approved
Temperature Range
- Standard: -40° to +70°C
- Extended: -55° to +85°C
Twelve Universal (U) Terminals
U terminals are software configurable for analog or digital functions.
- Analog functions consist of:
- Analog inputs: 12 single-ended or 6 differential with ±5000 mV, ±1000 mV, ±200 mV ranges 24 bit ADC
- Analog outputs: ±2.5 V or ±4 mA ranges for bridge measurements 12 bit DAC
- Static frequency-analyzed vibrating wire: terminal pair both excites to 12 V p-p and 100 Hz to 6.5 kHz and reads vibrating-wire transducers
- Thermistor: completion resistor internal 5 kΩ
- Period average: up to 200 kHz, amplitude dependent
- Low level ac: 1 Hz to 20 kHz, amplitude dependent
- Digital I/O functions consist of 5 V or 3.3 V logic levels for:
- General status/control
- Voltage source 5 V, 3.3 V, 20 mA @ 3.5 V
- Timer I/O
- Switch closure (150 Hz) or high frequency counter (1 MHz)
- Pulse width modulation
- Interrupts
- SDI-12 and SDM
- Serial asynchronous communication Tx/Rx pairs
Four control (C) Terminals
C terminals are software configurable for digital functions. Digital I/O functions consist of 5 or 3.3 V logic levels for:
- General status/control
- Voltage source 5 V, 3.3 V: 11 mA @ 3.5 V
- Timer I/O
- Switched closure (150 Hz) or high frequency counter (1 MHz)
- Pulse width modulation
- Interrupts
- SDI-12 and SDM
- RS-232/RS-485: half or full duplex, Tx/Rx pairs
