2 specifications, Specifications, 1. cdm-vw300 / datalogger compatibility – Campbell Scientific CDM-VW300 Series Dynamic Vibrating-Wire Analyzer System User Manual
Page 18: See table 5-1
CDM-VW300 Series Dynamic Vibrating-Wire Analyzers
5.2 Specifications
Electrical specifications are valid from –25 to 50 °C unless otherwise specified.
Non-condensing environment required. Specifications are subject to change.
Compatibility:
TABLE 5-1. CDM-VW300 / Datalogger Compatibility
Datalogger
Connect with
SC-CPI
1
Module
Maximum
Measurement
Rate (Hz)
Maximum CDM-
VW305 Analyzers
at Max Rate /
Maximum
Channels
CR3000 *
100
2
1/8
– – 50 3/24
– – 20 6/48
CR800 /
CR1000
* 50
1/8
– – 20 4/32
Frequency measurement:
A vibrating-wire circuit is excited and
measured through the same coil
connection. Sinusoidal excitation
persists for a few cycles of the wire
oscillation. The wire is maintained in a
continuously vibrating state. Excitation
voltage varies automatically to maintain
the desired return signal strength.
Dynamic measurement
rates:
20, 50, 100, 200
3
, and 333.3
3
Hz
Accuracy:
±(0.005% of reading + effective
measurement resolution)
Input resistance:
5 kΩ
Excitation voltage
Range:
0 to ±3 V (6 V peak-to-peak)
Resolution:
26 mV
8