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10 Safety Assurances and Precautions
10.1 Hazardous Environment Safety
The LumaSense E
T QUASAR M8100-EXP enclosure is designed to hold an explosion inside the
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housing and release the hot gases slowly enough to allow them to cool sufficiently to not ignite
the explosive gases outside the housing. It is important to take care of the mating surfaces
between the housing and its lid. Also be sure to torque the lid bolts to specification.
Factory inspections, assembly and test procedures are strictly followed to ensure the highest
quality, integrity, and functionality of the Explosion Proof Housing. Use care during reassembly
to maintain gasket and surface integrity. Deep scratches or gouges could allow gases to be
released at excessively high temperatures during an explosion.
•
When servicing the instrument, ensure that the main power is disconnected or
switched off. Allow the instrument 20 minutes to cool down prior to opening.
•
When connecting electrical wiring to the circuit board, ensure that the wires are
properly secured to prevent accidental shorting or a hazardous live condition in the
event screws loosen.
•
Check and secure the safety ground connections just prior to lid closure.
•
When attaching the utility conduit, ensure that at least five threads are engaged
and that appropriate seal fittings and practices are followed in accordance to
explosion-proof practices.
•
When replacing the top cover, the sixteen M8 x 1.25 socket head screws must be
torqued to specification (50in-lbs, 5.5n-m).
•
Ensure that the surface temperature of the explosion-proof housing does not
exceed 120 °F (50 °C). Cooling may be required.
•
Take note of all Hazardous Classifications. Refer to Appendix B, Area
Classifications and Protection Concepts, for details.
10.2 Electrical Service Protection
10.2.1 Over-Current Protection / Service Switch
It is necessary to incorporate an external over-current protection device appropriate to the
instrument's service and to include a disconnect switch located near the instrument. The service
disconnect should be clearly marked as pertaining to this instrument.
10.2.2 Over-Voltage Protection
Maximum applied voltage must not exceed the following limits:
•
260∽ Terminal Block 1 (TB1) between terminals or any terminal and GND.
•
120∽ Terminal Block 2 (TB2) terminals 2, 3, and 4 between terminals or any terminal
and GND.
•
20VDC Terminal Block 2 (TB2) terminal 1 and 2 between terminals or any terminal
and GND.
E
T QUASAR Flare Monitors Operation Manual
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Safety Assurances and Precautions • 53
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