User guide

A-2 ADS Model 4000 Manual
Operating
Temperature
0° to 60° C (32° to 140° F)
Power
Primary Power: 12-volt battery pack (approximate
life-span of 365 days at 15-minute sample rate)
Memory Backup: 3-volt lithium battery (maintains
monitor memory during primary power loss or
battery swap)
Secondary Backup: Battery-backed RAM
(maintains monitor memory during primary power
and lithium battery failure)
Connectors
U.S. MIL-C-26482 series 1 with gold-plated
contacts
Inputs and
Outputs
Ultrasonic depth sensor input
Doppler velocity sensor input
Pressure depth sensor input
Sampler output/rain gauge input/external power
input
Communication (telemetry or DMI cable)
Processor Board
Processor
80C31 CMOS Microprocessor
Memory
EPROM: 64K bytes (program storage)
RAM: 1024K bytes (battery-backed data storage)
Data Storage
365 days (1 velocity and 2 depth readings at a 15-
minute sample rate)
Programming
Language
BASIC
Protocol
Proprietary YAPP query-response protocol with
CRC-16 error detection for modem and serial
communications
Discrete Input
16-bit counter for counting external contact
closures
Discrete Output
Optically-isolated, open collector programmable
output