Live Maintenance Procedure - Replacing And; Adding A Sensor - MSA ALTAIR 4X Manual De Funcionamiento

4.2 Live Maintenance Procedure -
Replacing and Adding a Sensor
Before handling the PC board, the user must be properly
grounded; otherwise, static charges could damage the
electronics. Such damage is not covered by the warranty.
Grounding straps and kits are available from electronics
suppliers.
Remove and reinstall sensors carefully, ensuring that the
components are not damaged; otherwise instrument
intrinsic safety may be adversely affected, wrong readings
could occur, and persons relying on this product for their
safety could sustain serious personal injury or death.
To add sensor to an instrument that is not already equipped with a
a
full array of sensors, remove the sensor plug from in front of the
formerly unused sensor housing.
While instrument case is open, do not touch any internal
components with metallic/conductive objects or tools.
Damage to the instrument can occur.
1. Verify that the instrument is turned OFF.
2. Remove the four case screws, and remove the case front while
carefully noting the orientation of the sensor gasket.
3. Gently lift out and properly discard the sensor to be replaced.
• Using fingers only, gently remove the toxic, combustible, or
oxygen sensor by gently rocking it while pulling it straight from
its socket.
4. Carefully align the new sensor contact pins with the sockets on the
printed circuit board and pressing it firmly in place.
NOTE: Ensure tab on sensor aligns with groove at top of holder.
• Insert the toxic sensor by placing it in the left-hand position of
the sensor holder.
• Insert the O 2 sensor by placing it in the right-hand position of
the sensor holder.
" CAUTION
" WARNING
" CAUTION
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