Toxalert TOX-OXY2 - Manual (Page 2)

GUIDE SPECIFICATIONS
TOXALERT INTERNATIONAL, INC., P.O. BOX 159, MOUND, MINNESOTA 55364 (952) 472-4541 FAX (952) 472-4960
Visit our website at www. toxalert. com
Provide a Toxalert Model TOX-OXY2 oxygen depletion Detection and Control systems as
specified.
The oxygen sensor(s) shall have a range of 0 to 25% and a linear 4 to 20mA output signal over its
range. The senor shall be housed in an industrial style explosion proof housing. The sensing
element shall be electro-chemical diffusion barrier type and be designed for ten (10) year ele-
ment life. Sensors with a 3 year or less expected life are not acceptable. The sensor shall be pow-
ered by low voltage and its 4 to 20mA output shall be directly proportional to the percent of
oxygen being detected. When sensor fails it shall drive its output signal to zero indicating alarm
condition.
The oxygen sensor shall have the following diagnostic light emitting diodes (LED’s): 1) Power; 2)
Sensor Failure; 3) LOOP UP (LED varies in intensity indicating 4 to 20mA loop current to
controller). Sensor shall have volt meter terminals on face of sensor to indicate percent oxygen
being detected.
The controller shall monitor the oxygen sensor(s) and shall have two modes of control. The first
mode, “warning” shall light an amber warning lamp and start the mechanical room ventilation (or
purge) system. The second mode, “alarm,” shall light a red alarm light and sound the audible alarm.
The audible alarm shall have momentary push button silence switch to silence the audible portion
of the alarm. The audible alarm, after being silenced, shall automatically reset and sound again at
the next occurrence.
When the oxygen level drops to 19.5% the “warning” mode shall be activated. When the oxygen
level drops to 18.5% the alarm mode shall be activated. Contact outputs shall be supplied for
“warning” and “alarm” modes. The controller panel front shall include the following labeled indicator
light and control switches.
1. Power to system light.
2. Labeled “warning” level indicator light for each sensor
3. Labeled “alarm” level indicator light for each sensor
4. Audible alarm & silence push button.
5. Purge switch to manually activate the mechanical room ventilation equipment.
6. Sensor malfunction light
SPECIFICATIONS
Method: Electochemical cell diffusion barrier
type
Range: 0-25% Oxygen
Warning Set Point: Field adjustable, factory
set @ 19.5%
Alarm Set Point: Field adjustable, factory
set @ 18.5%
Input Power: 120 VAC, 1 amp
Relay Outputs: 5 A @ 120 VAC resistive load
Operating Range:
Temperature: 5º F to 95º F (-15º C to 35º C)
Humidity: -90% RH non-condensing
Pressure: .75 to 1.25 atmospheres
Gas: Oxygen (O
2
)
Sensor Life: 10 years
Zero Drift: Less than 5% per month
Response Time: 10 seconds to 90%
Warning Stage Outputs: Visual Indicator; Form C
relay outputs, @ 120 VAC, 5A.
Alarm Stage Outputs: Visual Indicator; Audible
Horn, with Silence Switch; relay output, 5A @
120 VAC
Sensor Malfunction Output: Visual indicator
Dimensions:
Controller: 14”H x 12”W x 6”H
Sensor: 8.5”H x 4”W x 4.2”D