22May2002
Page
1
2-Wire Toxic Smarter
Transmitter
I. Description:
The model TA-2102
smarter
Transmitter provides remote detection of a specific toxic gas
using Mil-Ram’s patented
no false alarms
electrochemical sensor technology. The
transmitter is two-wire loop powered and transmits a standard 4-20mA signal. The
smarter
transmitter operates on 10-30 VDC.
II.
Smarter
Features:
•
2-Wire Loop Powered
– operates on 10-30 VDC and generates a standard 4-20mA
signal
•
Self-Calibration
– unattended span calibration adjustments performed every 30 days
based on life curve for sensor
•
Auto-Calibration
– non-intrusive calibrations using a magnet to activate zero and span
switches located behind glass window of explosion-proof junction box – no mechanical
adjustments required
•
LCD Display
– 12 character x 2 line display provides meter readings, calculated values
and diagnostic messages
•
Life Remaining
– sensor life remaining based on calibration history, life curve for sensor
and electrical characteristics of sensor
•
Peak Value/15-min. TWA/Number of days since last gas calibration
—Transmitter
displays this information on demand
•
Loop Test
–
Output 4/8/12/16/20mA to verify readings and alarms at controller
electronics
•
Calibration Mode Alarm Inhibit
– during span calibration and for a period of 5 minutes
after calibration, the transmitter outputs 4.0mA
•
Diagnostics
– continuous diagnostics related to both hardware and software operation
with auto reset of micro-controller in the event of software failure – provide messages
including Replace Sensor, Remaining Sensor Life and Sensor Disconnected
