ADS Environmental Services Model 4000 530017 A0 - Manual (Page 15)

System Overview 2-3
ADS Model 4000 Flow Monitor
The ADS Model 4000 flow monitor is a waterproof, airtight,
cylindrical, marine-grade aluminum canister housing a chassis
securing multiple printed circuit boards and a portable power
source. The one-piece internal chassis, attached to the inside of the
monitor lid, provides a mounting surface for the following boards:
Central processing unit (CPU) board
Depth interface board
Velocity interface boards
Modem board
Lightning protection board
4000 flow monitor with chassis (left) removed from enclosure (right)
The processor board mounts directly to one side of the chassis. The
velocity boards mount on top of the processor board. The depth
board mounts directly to the other side of the chassis. The modem
board mounts on top of the depth board, and the lightning
protection board mounts below the depth board. A ten-connector
ribbon cable provides an interface among the processing, depth,
and velocity boards.