Xylem H-3531 FlashLite - Manual (Page 9)

Chapter 1
Introduction
H-3531
Introduction 1-1
1.0 Introduction
The W
ATER
LOG H-3531 FlashLite™ is a Highly accurate digital pressure transducer ®
specifically designed for water level monitoring. The H-3531 FlashLite™ directly measures sdry
gas pressure over a broad temperature range. The typical application of the H-3531 FlashLite™
is to be used with the H-355 Gas Purge System however, the H-3531 FlashLite™ is a easy to
setup pressure sensor that can be used in many other applications.
The H-3531 FlashLite™ has SDI-12, RS232, and Modbus “smart” digital interfaces together
with Quadrature, 0-5V analog and 4-20mA output options. The H-3531 FlashLite™ makes
multiple pressure measurements, averages the results and converts the measurement data into
units of PSI, Feet, Meters or other engineering units.
The H-3531 FlashLite™ is easy to use and works with any SDI-12 V1.3 compliant data recorder
with the exception of the SDI-12 CRC commands. The “Serial-Digital Interface” is ideal for data
logging applications.
The H-3531 FlashLite™ has the following features:
! Simple to install, use, and maintain (no on-site calibration required).
! Battery operation with minimal drain.(Less than 1 milliamp)
! Performs extremely accurate measurements of dry gas.
! Linear deviation is less than 0.02%
! Up to 250 feet of SDI-12 cable or up to 1000's of feet with the H-423(SDI-12 to RS485
converter).
! Resolution is 1 part in 1,000,000
! Accuracy over temperature range exceeds ±0.02 ft. of water.
! Enclosure is nonconductive and corrosion proof.
! Sensor has an atmospheric vent for compensation of barometric pressure changes.
! Extended SDI-12 commands for setting the Stage to the current water elevation.
! RS-485 Modbus RTU mode interface.(Industrial mode only)
! RS-485 H-355 Gas Purge System control.(Industrial mode only)
! Simple RS232 menu interface for quick setup time.(No external module required)
! Designed to output a 4-20 mA signal.(Industrial mode only)
! Designed to output a 0-5V signal.(No external module required)
! Designed to output a Quadrature signal.(No external module required)
! Designed to output a RS232 signal.(No external module required)