Live Maintenance Procedures; Sensor Replacement; Warning - MSA Solaris Manual De Operación

Live Maintenance Procedures

Sensor Replacement

1. Verify that the instrument is turned OFF.
2. Remove the front case.
3. Gently lift out and properly discard the sensor to be replaced.
• Remove the CO or H 2 S sensor with a nonconductive or
nonmetallic flat blade screwdriver or similar tool by pressing
against the sensor holder tab and lifting out the sensor:
• CO sensor holder tab is in upper left corner
• H 2 S sensor holder tab is in upper right corner.
• Remove the combustible or oxygen sensor gently with your
fingers only.
Remove and reinstall sensors carefully, ensuring that the
components are not damaged. Damage can adversely affect
the intrinsic safety of the instrument and result in serious
personal injury or death.
4. Verify that combustible and oxygen sensor standoffs are installed.
NOTE: Sensor positions cannot be changed:
• The CO sensor must be placed in the red sensor holder.
• Note that the CO gasket in the sensor is also red.
• The H 2 S sensor must be placed in the blue sensor holder.
• Note that the H 2 S gasket in the sensor is also blue.
5. Carefully align the new sensor contact pins with the sockets on the
printed circuit board.
6. Press the new sensor into place.
• Press the CO sensor into place by placing the sensor
under the sensor holder tab first; then, press into place
(CO sensor tab is located in the upper left-hand corner of
the sensor Holder).
• Press the H 2 S sensor into place by placing the sensor
under the sensor holder tab first; then, press into place
(H 2 S sensor tab is located in the upper right-hand corner
of the sensor Holder).
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" WARNING