Siemens RAPIDLAB 248, Operator'S Manual, Page: 49 / 135

Maintaining the System Page 3-11
Changing the Cylinders
WARNING
Compressed gas cylinders require careful handling. To
prevent damage and possible personal injury, observe the following
precautions:
• Never drop cylinders, allow them to strike each other or subject
them to other strong shocks.
• Secure cylinders to a wall or bench, or place in a cylinder base
support stand.
• Never drag, roll or slide cylinders, even for short distances. Use a
suitable hand truck to move cylinders.
• Never tamper with safety devices in regulators or cylinders.
• Use these gases for the calibration of clinical and research
instrumentation only. US Law prohibits dispensing these gases for
drug use.
• The contents are under pressure – do not puncture.
• Do not use or store near heat or open flame.
• Do not expose cylinders to temperatures above 54
°
C (130
°
F) as this
may cause the contents to vent or explode.
• Never throw cylinders into fire or incinerators. Follow the disposal
instructions on the cylinders.
Equipment: Cal gas cylinder; Slope gas cylinder, as required.
1. Stop the 248 system, Page 3-8
2. Remove and dispose of the empty cylinder:
Figure 3-7. Changing the Gas Cylinder
a. Close the cylinder by turning the cylinder valve clockwise.
b. Unscrew the yoke screw to disconnect the gas regulator.
c. Remove the cylinder to a well-ventilated, open area.
d. Position the valve outlet so that it is facing down, away from
people and loose objects.
WARNING
Avoid contact with the gas stream. Gas under pressure
can cause bodily injury or damage to property.
e. Slowly turn the cylinder valve anticlockwise to release the
cylinder contents.
Gas Cylinder Seal
Yoke Screw
Cylinder Valve
Needle Valve