MTS Model 293-22 Hydraulic Service Manifold - Manual (Page 31)

Do not use RF transmitters
Keep radio frequency (RF) transmitters away from the workstation computers, remote terminals, and
electronics consoles. Intense RF fields can cause erratic operation of the more sensitive circuits in the
system.
Know compressed gas hazards
Some environmental chambers use liquid nitrogen or some inert gas to achieve a required test atmosphere.
Typically these gasses are supplied in pressurized tanks.
Observe the following safety practices when you work with high-pressure air or gases:
• When you charge an accumulator, follow all the charging instructions provided in the appropriate product
information manuals. When precharging accumulators, properly identify the type of gas to be used and
the type of accumulator to be precharged.
• Use only dry-pumped nitrogen to precharge nitrogen-charged accumulators. (Dry-pumped nitrogen
can also be labeled “oil pumped” or “dry water pumped.”) Do not use compressed air or oxygen for
precharging: the temperature increase caused by rapid gas compression can result in highly explosive
conditions when hydraulic fluid is in the presence of oxygen or compressed air.
• Always follow the recommended bleeding procedures before you remove or disassemble components
that contain pressurized gas. When you bleed a gas or remove a fitting, hose, or component that
contains a gas, remember that many gases cannot support life. Therefore, as the ratio of released gas
to oxygen increases, so does the potential for suffocation.
• Wear appropriate safety devices to protect your hearing. Escaping air or gas can create a noise level
that can damage your hearing.
• Ensure that all pressurized air or gas is bled out of a pneumatic or gas-charged device before you start
to disassemble it. A thorough understanding of the assembly and its pressurized areas is necessary
before you undertake any maintenance. Refer to the appropriate product information for the correct
bleeding procedure.
It may not be obvious or intuitive which bolts or fittings are used to restrain a pressurized area. On
some assemblies, you must remove a cover plate to gain access to the structural bolts. Sometimes, to
protect you from a rapid release of trapped gases, a small port is exposed when you remove this cover
plate. Exposing this port ensures that the gas precharge is fully bled before disassembly. However,
this is not the recommended procedure for bleeding a pneumatic or gas-charged device, because it
can expose you to the dangers of escaping compressed gas and particulates that are expelled from
the chamber or around the seals. Do not assume that cover plates and ports are installed in all the
critical locations.
Consult MTS when in doubt about the safety or reliability of any system-related procedure or modification
that involves devices that contain any type of compressed gas.
Model 293.22 Hydraulic Service Manifold | 31
Safety