© Valeport Limited 2003
MIDAS Surveyor Operating Manual
Page 5
0420805d.doc
2
SPECIFICATION
2.1
M
IDAS
SURVEYOR
Materials
Injection moulded ABS case, sealed to IP67, with automatic pressure balancing valve.
Dimensions
50 x 40 x 20cm
Weight
15kg
Display
240 x 128 pixel graphics LCD screen.
Power
Accepts 12 – 24vDC external input for running or charging. Draws approximately 200mA at 12v.
Batteries
Internal 8.4Ah sealed lead acid batteries, charging automatically when external power is applied.
Memory
16Mbyte FLASH memory (holds approximately 30 hours’ data). Optional 32Mbyte FLASH memory.
2.2
TRANSDUCERS
2.2.1
HIGH FREQUENCY
Frequency
210kHz (200kHz option)
Accuracy
greater of ±0.01m or ±0.02% reading.
Resolution
0.01m
Range
0.3 to 100m
Beam Width
7.5°
Sample Rate
6Hz
Dimensions
12cmØ
Cable Length
10m
2.2.2
LOW FREQUENCY
Frequency
33kHz (30kHz option)
Accuracy
greater of ±0.01m or ±0.02% reading.
Resolution
0.01m
Range
0.3 to 100m
Beam Width
16.5°
Sample Rate
6Hz
Dimensions
25cmØ
Cable Length
10m
2.3
GPS
2.3.1
12 CHANNEL GPS
Type
Ashtech A12 DGPS receiver module.
Differential
Onboard SBAS Correction
Accuracy
±2m (CEP), ±4m (95%) with SBAS correction
Update Rate
1Hz
Antenna
Combined GPS / SBAS plane antenna (IP67), 5m cable
