ChemDAQ Steri-Trac, Руководство по эксплуатации

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voltage electrical connections out to the remote displays, signal connections for the DAQ computers,
and dry relay contacts that respond to alarm conditions.
Cables are usually brought to the wall box via conduit from above, but the wall box is designed to
accommodate other orientations as well. Please see the
Steri-Trac Installation Guide for a complete
description.
Relays in the Wall Box: The wall box contains dry relay contacts which open or close when the monitor
alarms. These contacts can be used to send a signal to a central alarm system or to activate other systems
such as exhaust fans.
There is a set of contacts for the low level alarm and a set for the high level alarm. The normally open
contacts are energized open when conditions are normal, and close during alarm conditions. The
normally closed contacts are energized closed when conditions are normal, and open during alarm
conditions.
The power supply in the wall box accepts either a 110 or 220 V AC supply at 50/60 Hz and provides
power to the instrument together with up to three remote displays.
Major Components of the Steri-Trac Monitor
Display and Horn

Display – Four digit ultra-bright 5x8 Tri-Color LED blocks that show the gas concentration in
parts per million (ppm). When the gas concentration is at safe levels (determined by user-defined
thresholds), the display is steady green. When the first user-defined alarm threshold is met the
display shows the real time gas concentration in orange to indicate the higher level or alert.
When the gas concentration exceeds the user-defined second alarm threshold the display turns to
red and flashes the real time gas concentration to alert all users of the dangerous situation.

Horn – The Steri-Trac includes an 85 dB horn that produces a loud cycling horn to notify users
that the gas concentration is above the first alarm threshold.
Alarm Silence Button Pressing the alarm silence button silences the alarm if the instrument is in alarm.
The default setting is that the alarm will stay silent so long as the gas concentration does not rise through
Sensor
Module
Monitor Body
LED Display
Alarm Silence /
Menu Button
Horn