38 Maintenance and Troubleshooting
418
Disposing of Empty Calibration Gas Cylinders
1 Empty the cylinder completely by pushing in the pin of the regulator valve or by pulling out the
pin of the fill valve using a tire valve stem wrench or a pair of needle nose pliers.
2 When the cylinder is empty, either remove the valve stem from the fill (or regulator) hole, or drill a
hole in the cylinder.
3 Write "Empty" on the cylinder and dispose of it appropriately for scrap metal.
WARNING
Ensure that the cylinder is completely empty before trying to remove the valve stem or drill a hole in
the cylinder.
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