Campbell Scientific CDM-VW300 Series Dynamic Vibrating-Wire Analyzer System User Manual
Page 19
CDM-VW300 Series Dynamic Vibrating-Wire Analyzers
Sensor resonant frequency
range:
TABLE 5-2. CDM-VW300/305
Sensor Resonant Frequency Range (Hz)
Sample Rate
Minimum Sensor
Frequency
Maximum Sensor
Frequency
20 290 6000
50 290 6000
100 580 6000
200
3
1150 6000
333.3
3
2300 6000
Effective resolution (precision):
TABLE 5-3. CDM-VW300/305
Effective Frequency Measurement Resolution
4
Sample Rate (Hz)
Noise Level (Hz RMS)
5
1 0.005
20 0.008
50 0.015
100 0.035
200
3
0.11
333.3
3
0.45
Sustained input voltage without
damage:
–0.5 to 7.1 V
Temperature measurement:
Temperature measurement is
available for sensors so equipped.
Excitation and half-bridge
measurement circuits are integrated
into the CDM-VW300 and CDM-
VW305 analyzers.
Accuracy:
0.15% of reading
6
Resolution:
0.002 Ω RMS @ 5 kΩ thermistor
resistance
Bridge resistor:
4.99 kΩ 0.1%
Excitation voltage:
1.5 V
Measurement rate:
1 Hz
9