MODEL 8800 SERIES GEONET WIRELESS DATA HOSTING SYSTEM
| SPECIFICATIONS |
29
APPENDIX A.
SPECIFICATIONS
A.1 GATEWAY SPECIFICATIONS
TABLE 11:
Gateway Specifications
A.2 LOGGER SPECIFICATIONS
TABLE 12:
Logger Specifications
A.3 NETWORK SPECIFICATIONS
13:
TABLE 13:
Network Specifications
Data Memory
11:
32 MB
Storage Capacity
> 1.04 M Arrays
Communication Type
USB, RS-232
Communication Speed
115.2 kBits/second
Communication Parameters
8,N,1 (data bits, parity, stop bits)
Scan Interval
10-1440 Minutes
USB Driver
FTDI
Power Supply
Cellular Gateway: Battery pack, or 9
‑
24V DC external
Local Gateway: D cell, alkaline or lithium (2x), or 12V external
Operating Time
Please contact
GEOKON
Operating Temperature
−40 °C to +85 °C
(L
×
W
×
H)
Cellular Gateway: 160 × 260 × 91 mm
Local Gateway: 120 × 122 × 91 mm
Data Memory
12:
32 MB
Storage Capacity
Varies by model
Trueness
0.082 Hz
Frequency Precision
±0.146Hz (99% CI)
Frequency Resolution
±0.002 Hz
Thermistor Accuracy
External thermistor: ±0.5 °C
On-board sensor: ±0.4 °C
Thermistor Resolution
External thermistor: ±0.032 °C
On-board sensor: ±0.1 °C
Scan Interval
10-1440 Minutes
Power Supply
D cell, Alkaline or Lithium (2x), or 12V external
Operating Temperature
−40 °C to +85 °C
VW Excitation Peak Current
25 mA (max)
VW Frequency Range
400 Hz - 5000 Hz
Sweep/Read Duration/Channel
< 500 mS
Battery Life
Refer to Section 4.2
Dimensions (L×W×H)
120 × 122 × 91 mm (single-channel)
160 × 260 × 91 mm (four-channel)
180 × 280 × 101 mm (eight-channel)
Vibrating Wire Channel
Lightning Protection
Gas discharge tube
High-speed surge protector
Transient voltage suppression diode
Thermistor Channel
Gas discharge tube
Inductor (lower resistance than high
‑
speed surge protectors)
Transient voltage suppression diode
Network
North America
Brazil
Australia
Radio Frequency, ISM Band
902-928 MHz
902-906, 915
‑
928 MHz
915
‑
928 MHz
Topology
Star/Mesh/Cluster Tree (Automatic)
Radio Technology
FHSS
Channels
12
Range
1
1.22
km (
30
5 km x 4 hops)
Transmit Power
250
W
Receiver Sensitivity
−
101
dBm
Antenna (Half
‑
Wave Dipole)
2.1 dBi
1
Line-of-sight, maximum 4 hops
26
km (
6.
5 km x 4 hops)