Sequoia LISST-SL, Руководство по эксплуатации

Страница: 12 / 56

LISST-SL V2.1
User’s Guide
8
1. Parameters Displayed on TCB
Particle Concentration [mg/l]
Mean Particle Size [µm)
Optical Transmission
Depth of instrument
Temperature of water
Water velocity in the river
Pump drive voltage and current (semi-quantitative, bars)
State of Charge of the Battery
2. Operating Specifications
Sediment Concentration: 10-2000 mg/l (nominal) [Depends on grain size].
Silt Density is assumed to be 2.65. [for other values, you will need to adjust
the density as follows: first divide by 2.65 then multiply by new density].
Size Ranges: 1.9
– 381 µm for randomly shaped grains (versus spheres).
Size Resolution: 32 log spaced size classes
[each size is 1.1809 times
previous].
Mean Size: 1.9 to 381 microns. See Appendix A.
Optical Transmission: 0 to 100%. Useful range: 30-98%.
Depth of operation: 0 - 30 m (100ft).
Operating Temperature: 0
– 40 0
C (32
– 104 0
F)
River velocity: 0
– 3 m/sec, or 0-10 ft/sec;
Isokinetic control range
– 0.5 to 3 m/sec, or 1.5 to 10 ft/sec. [pump minimum
speed is set to a low value to prevent sediment accumulation within it].
Power consumption: 24V, 2.5Amp (with pump full on)
3. Datalogger Specifications
128 MB storage capacity; corresponding to at least 100,000 size
distributions and associated sample information [over 20 hours operation.]
Expandable to 4 GB.
RS232 Interface
4. Power
Battery
– Rechargeable Lithium-ion battery pack. 24V x 19.2 A-hr. (inside
TCB)
Battery life on bridge: 8 Hours, nominal.
[WILL NOT CHARGE WHILE TCB IS IN
USE]
Battery Alarm will sound when ½-hour life left on battery.
AC battery charger (120/240VAC) [ 8 hrs recharge time].
5. Physical Dimensions
LISST-SL Sensor
With tail and sail attached: 25.4 x 63.5 x 76.2 cm. [H x W x L]
Weight (in air): 16 kg (35 lbs)
Weight (in water): 7 kg (15 lbs).
Topside Control Box
17.8 x 29.2 x 44.5 cm
Weight: 9 Kg (19 lbs).