Note to Design Engineer:|
The ToxControl controller is designed to monitor analog input signals from remote sensors, indicate system alarm status and to control ventilation fans. The front panel display is normally custom designed for each project. Usually 2 color LED's (green & red) are used to indicate "Warning" (fan ON) and "Alarm" level for each sensor.
Optional digital displays may be supplied on the face of the panel. One digital display for each type of gas being sensed is often supplied and the display automatically displays the highest value being sensed. Manual PB switches can be applied to switch in the sensor reading desired.
A "loss of sensor signal" alarm should be required to indicate sensor failure.
Provide a ToxControl controller to monitor the [type of sensor] sensors and shall start the exhaust fan(s) per the table on the drawings. When a sensor indicates a gas concentration of [xx PPM] or [30% LEL (low explosive level)] or higher the associated exhaust fan(s) shall start and an LED on the face of the controller shall indicate "Warning level" (exhaust fan on) operation. If the gas concentration reaches [yy PPM] [50% LEL] or higher a red alarm LED on the face of the controller shall light and the audible alarm shall sound and an alarm set of contacts shall close. The audible alarm shall be a minimum of 68dB and have a momentary push button silence switch.
Provide one each labeled, two color LED (light emitting diode) or two different colored lights for each sensor input. The LED or lights shall light green to indicate "Warning level" and light red for "Alarm level."
Provide "Sensor failure" indication for each sensor. The sensor shall be designed such that the controller can detect when a sensor has failed. Provide a light or LED on the face of the controller panel for each sensor input to indicate sensor failure. The detection of a failed sensor shall sound the audible alarm.
The gas monitor and control system shall utilize non-volatile memory and/or shall maintain all programs for a minimum of 72 hours during power loss. The gas detection and control system shall be as manufactured by Toxalert International, Inc.
Note to Engineer:
[Provide day and time table for equipment to operate]
If special functions are required please call Craig Wolfe of Toxalert International, Inc. [Phone (952) 472-4541] for special consultation. We will gladly assist in writing your special system specifications.
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