Clock accuracy:
±3 minutes per year
Measurement interval range:
1 s to 1 day
USB Micro-B:
Direct connect to computer (supplies power for configuration
and data collection), 2.0 full speed, 12 Mbps
Configuration:
Software configurable, no programming required
Measurements
Channel count:
Three vibrating-wire (VW) and three thermistor/RTD
(temperature) measurements
Measurement speed:
1 s per sensor (VW and temperature)
Vibrating wire
Measurement excitation
options:
2 VDC (±1 VDC), 5 VDC (±2.5 VDC), 12 VDC (±6 VDC)
Measurement (frequency)
resolution:
0.001 Hz RMS (–40 to 70 °C)
Time series basic resolution:
24-bit ADC
Measurement accuracy:
±0.005% of reading (–40 to 70 °C)
Measurement method:
VSPECT (spectral analysis), U.S. Patent No. 7,779,690, includes
diagnostic data
Temperature (resistance)*
Measurement method:
Half-bridge ratiometric, 24-bit ADC, built-in completion
resistor 4.99 kΩ 0.1%
Thermistor precision:
0.020 Ω RMS @ 3000 Ω (approximately 0.00015 °C RMS for
most vibrating wire thermistors)
Accuracy:
±0.15% of reading (–40 to 70 °C)
Power
Charge terminal:
16 to 28 VDC from solar panel or DC power converter
Battery options:
Rechargeable 7 Ah or 8 D cell alkaline
Physical
Weight:
4.2 kg (9.2 lb) with rechargeable battery or 3.0 kg (6.6 lb) with
alkaline batteries
Operating temperature
range:
–40 to 70 °C
CRVW3 3-Channel Vibrating-Wire Data Logger
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