Met One Instruments 597A, Руководство по эксплуатации

Страница: 7 / 20

597A-9800 Manual Rev A Page | 2
4. Product Overview
The 597A ships from Met One Instruments pre-wired for digital output signals including RS--
232, RS-485 and SDI-12. The 597A also includes voltage outputs for AT/RH/BP, and an ID
voltage used by some Met One monitors and dataloggers to identify the sensor. The voltage
outputs are 0-2.5VDC default, and can be changed to 0-1VDC or 0-5VDC.
The 597A uses a piezoresistive pressure sensor, a microprocessor-controlled relative humidity
module, and a platinum RTD temperature sensing element. The response of each element is
linear with negligible hysteresis. Each sensor element in the 597A is controlled using an on-
board microcontroller, which contains an analog-to-digital converter and non-volatile memory
for storage of factory-determined calibration coefficients. The microcontroller polls the sensor
module once per second. Measurements are temperature corrected, the calibration
coefficients applied, and the processed measurement sent out via serial communication.
All wiring terminals on the 597A are protected from static-surge damage by transzorbs and
current-limiting resistors.