Model
8020-47 DSP Digital Signal Processor
The Model 8020-47 DSP Digital Signal Processor
is designed to be used with Geokon vibrating wire instruments for the
elimination of spurious noise effected readings such as those caused
by high voltage electrical cables and other forms of electrical interference.
The digital signal processor removes the “errant” data by using
proprietary techniques of digital filtering. It is ideal for unattended
data acquisition systems where alarms may be triggered by preset threshold
values. The DSP can also be directly interfaced with PCs to provide
a stand-alone data acquisition system (contact Geokon for details).
| Specifications | |
| Measurement Range | 100 - 6000 Hz |
| Measurement Resolution | 100 ns/cycles counted |
| Operating Power | 12 V @ 60 mA |
| Temperature Range | –40°C to +60°C (no display) |
| L x W x H | 200 × 250 × 175 mm (with cover) |
Model
8020-50 Spread Spectrum Wireless Field Station
The Model 8020-50 Spread Spectrum Wireless Field
Station is a self contained, battery powered and wireless modem designed
to provide short range, full duplex data communication between Geokon
LC-1 and Micro-10 dataloggers and the operators PC. The L.O.S. range
is 1.6 km but this can be increased up to 8 km using optional “gain”
type antennas. The 902-928 MHz ISM Band Recombinant Spread Spectrum
transceiver eliminates the problems of interference common to most short
range wireless communication systems.
| Specifications | |
| Power Requirements | (internal) 12
VDC, 2.4 Ahr gelled electrolyte sealed lead-acid battery (external) 18 - 22 VDC, 500 mA, supplied through charger |
| Internal Charger | 400 mA Constant Current, 13.8 V trickle dual-mode |
| Current Consumption | (standby) 65 mA / (transmit) 650 mA |
| Line-of-Sight Range | 1.6 km with 0dB antennas (approximately) |
| Frequency Range | 2.4 - 2.4835 GHz ISM |
| Temperature Range | 0°C to +70°C |
Model
8020-54 VW Frequency to Analog Converter
The Model 8020-54 Vibrating Wire (VW) to Analog
Converter provides a simple way to connect Geokon’s vibrating wire
transducers to data acquisition systems which are not capable of reading
frequency signals nor able to generate the proper signals required to
excite VW transducers. The Model 8020-54 can operate with single transducers
as a stand-alone device, or with multiple transducers in conjunction
with the Geokon Model 8032 Multiplexer. The Model 8020-54 is powered
using a 12 V (nominal) supply, or the optional 24 V DC-DC converter
can be used to allow powering from a standard 24 V, 4-20 mA current
loop.
| Specifications | |
| Power Requirements | 40 mA @ 12 V
(operation), 50 µA (standby) 60 mA @ 24 V |
| Operation Modes | Single Channel, 16 VW sensors with thermistors,or 32 VW sensors |
| Output (Analog) | 0-5 V and 4-20 mA (scaled to range of transducer) |
| Accuracy | 0.1% F.S. |
| Resolution | 16 bit |
| Temperature Range | –20°C to +80°C |
| L x W x H | 111 x 108 x 36 mm (with cover) |