ADS Environmental Services Model 3600 530002 A2 - Manual (Page 122)

A-4 ADS 3600 Flow Monitor O&M Manual
Downloaded
Software
The downloaded BASIC program enables the QS3600 flow monitor to scan input
devices and store readings on the processor board.
A BASIC program is maintained in the battery-backed RAM to protect against program
loss in event of a battery failure.
The onboard BASIC interpreter provides sophisticated mathematical functions.
The central computer downloads the BASIC program to the monitor via a modem and
telephone line.
A BASIC program can be downloaded to the monitor to reconfigure monitor functions.
Optional programming is now available to allow for specialized monitoring, storing, and
alarming.
Computer and
QuadraScan
Software
The central computer and the installed software (IBM or IBM-compatible personal
computer with ADS QuadraScan software installed) activate the monitor and provide
data processing, reporting, and data storage functions.
Communication The monitor has a logic-level serial bus for communications between the processor and
input boards.
A modem and modem interface allow communication and data transfer between the
monitor and the central computer and between the monitor and the event notification
station.
The modem communicates at a 1200/2400 baud communications rate over standard
voice-grade telephone lines. The standard interface allows a direct connection for
servicing by an ADS IS certified technician.
The YAPP Communication Protocol (ADS proprietary protocol) for communications
ensures high data integrity by utilizing block message structure with appended CRC-16
check digits. Response is prohibited until a correct identification (ID) is transmitted. Re-
transfer of messages is permitted when an error is detected. Acknowledgments of
receipt are required for each transmission. A terminal mode for input/output (I/O) board
remote diagnostics is provided.
Lightning protection on the incoming telephone line protects against nominal lightning
transients.
Internal
Monitoring
The monitor records internal conditions that are reported in a hardware log, such as the
9 V battery pack regulated voltage, the EMU battery status (if applicable), the internal
monitor temperature, the BASIC code status, pending event status changes, and latest
data time.
Data Collection
and Storage
The monitor scans data inputs at specified time intervals to obtain readings for flow rate
measurement and other functions.
The monitor periodically samples the ultrasonic depth, Doppler velocity, and pressure
depth sensors/boards in standard intervals of 2.5, 5, 7.5, 10, or 15 min (Other intervals
between 1 min and approximately 18 hr can be specified, depending on the application.)
The monitor stores data readings in its own memory until the central computer collects
the data. When monitor memory storage locations are full, the monitor writes new
readings over the oldest data. The period of time during which data can be stored
before being overwritten depends on how many inputs are read and how often readings
are stored.