Toxalert TOX-O2/4 - Manual (Page 3)

TOXALERT INTERNATIONAL, INC., P.O. BOX 159, MOUND, MINNESOTA 55364 (952) 472-4541 FAX (952) 472-4960
Visit our website at www. toxalert. com
UNIT INDICATORS:
Refer to Figure 1.
The Tox-O
2
has five LED’s (light emitting
diodes) to assist in installation and system
diagnostics.
1. Power:
Green LED indicates power to
sensor.
2. Loop Current:
Green LED indicates that the 4 to
20 mA loop is flowing in output
circuit. LED intensity varies with
current flow.
3. Sensor Failure:
Red LED indicates the sensor has
failed.
4. Warning Relay (K1):
Red LED indicates oxygen concen-
tration is below relay setpoint and
relay is energized.
5. Alarm Relay (K2):
Red LED indicates oxygen
concentration is below relay
setpoint and relay is energized.
SPECIFICATIONS
Operating Temperature: 41ºF to 104ºF
(5ºC to 40ºC)
Storage Temperature: -4ºF to 140ºF
(-20ºC to 60ºC)
Relative Humidity: 0 to 95% non-condensing
Relay Output Indicator: Red LED when energized
Output Signal:
Tox-O
2
/1 - Linear 4 to 20 mA Sensor failure 2
mA or less
Tox-O
2
/4 - Warning relay and alarm relay
Mounting style: Surface
Weight: 2 pounds
Type: Electrochemical cell diffusion barrier
oxygen sensor.
Range: 0-25% Oxygen
Response Time: 10 seconds to 90% of change
Sensing Element Life: 10 years in normal service
Accuracy: + / - .75% of Full Scale
Electrical Data:
Input voltage: 24 vdc nominal (8.5 to 26.4 vdc)
Input power: Less than one watt
Loop resistance: 600 ohms maximum
Input current: 25 mA
Wiring: 3 wire non-isolated
Unit Construction:
Housing: Division 1, Class 1, Group B, C & D
Physical: 7”H x 4-1/2” W x 3-3/4” D
4