IMPORTANT
Be sure to read and understand this instruction manual before installing, operating
or servicing the gas detection equipment.
WARNING
• Do not open the sensor enclosure with power applied unless it is verified that no
combustible gases or vapors are present. Calibration or maintenance should not
be performed if there is any indication of the presence of combustible gas near
the sensor.
• If anytime an intrusive sensor calibration procedure has to be performed then de-
classify the area before opening the sensor junction box.
• The sintered flame arrestor on the stainless steel sensor head is an integral part of
the complete sensor assembly. Do not operate the gas sensor with the flame
arrestor removed or damaged.
CAUTION
• If needed the sensor threads should be coated with silicone free grease. The
junction box cover threads should also be lubricated .
Silicone based lubricants must never be used.
• Follow the wiring instruction for proper and safe operation under normal
conditions. Be sure that all wiring complies with NEC and all local ordinances.
PT295 Series Toxic Sensor Rev 5.1
5
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