MTS Material Test Systems - Manual (Page 38)

addition, it is recommended that the hydraulic power unit be located in a room separate from the test system,
if possible, to reduce noise in the test area.
Mechanical shock/vibration
In testing situations where impact testing is performed or in higher speed fatigue testing, cyclic loads and
simple shock pulses can be introduced into the laboratory floor. Adequate isolation is often possible with
vibration isolators. However, in some cases, an air bag isolation device might be required. Contact an MTS
representative for additional information.
Radiated emissions
Operation of the system can be affected by sources of electromagnetic interference (EMI) that are near the
system controls, computer, and related peripheral equipment. Common sources of EMI are thunderstorms,
broadcast systems, high voltage power lines, power tools, mobile communications, radar, vehicle ignition
systems, static electricity, induction heaters, and fluorescent lights.
The effects of EMI are unpredictable; additional grounding and shielding might be necessary. Techniques
such as using screen cages or other metal surfaces around the system, along with good grounding practices
and proper storage of magnetic memory medium, are recommended.
5.3.0 Electrical Power Distribution
The input line voltage to the system must be adequately rated for the loads required for the system. If possible,
electrical power supplied to the system should be on an isolated circuit or on its own transformer from the
main power box.
Size the power system with adequate reserve for future equipment additions and installation expansion. Both
the hydraulic power unit and the console controls must be considered in the electrical power distribution
system, with emphasis on providing “interference free” electrical power to the controls.
Control console power
Control console power should be filtered from outside RF interference and line-regulated to provide 105-130
VAC or 200-240 VAC, 50-60 Hz. An isolated power source or uninterruptible power supply is recommended
to reduce potential damage to components or fixturing from power loss. Make sure that the service to the
system is not on a line that can be accidentally shut off.
Review the individual component product manuals to ensure that the proper fuses and terminal boxes are
selected for use with the equipment.
Standby power
The system will operate over a normal range of power frequencies and voltages. However, where facility
power is excessively noisy and contains power spikes, either line regulation or the use of a uninterruptible
power supply is recommended.
Hydraulic power supply electrical power
Electrical power is input to the HPU starter box. Ensure proper phasing when connecting electrical power to
the HPU. Refer to the electrical schematic provided with the HPU product manual. Power cable access is
provided into the box with the cable going from the box to the electrical service disconnect. This disconnect
38 MTS Material Test System Operation
5.0 Installation Guidelines