Changing ComponentsMSA
ALTAIR 4
GB
15
(1) Disassemble the instrument [→ chapter 3.2].
(2) To add a sensor to an instrument that is not already equipped with a full array
of sensors, remove the sensor plug from in front of the formerly unused sensor
housing.
(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 cir-
cuit board and pressing it firmly in place.
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 middle position of the sensor holder.
Insert the combustible sensor by placing it in the right-hand position of the
sensor holder. Ensure groove in combustible sensor aligns with tab at top of
holder.
If any sensor is not to be installed, ensure that a sensor plug is installed
properly in its place.
(5) Assemble the instrument [→ chapter 3.3].
(6) Calibrate the instrument after the sensors have stabilised.
4.5 Replacing the PCB and Battery assembly
(1) Verify that the instrument is turned off
Attention!
Calibration is required after a sensor is installed; otherwise, the instru-
ment will not perform as expected and persons relying on this product
for their safety could sustain serious personal injury or death.
Allow sensors to stabilise at room temperature for at least 30 minutes
before calibration [→ chapter 6].
Warning!
Before, ensure you are properly grounded; otherwise, static charges
from your body could damage the electronics. Such damage is not cov-
ered by the warranty. Grounding straps and kits are available from elec-
tronics suppliers.
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