3
Operation
Exercise extreme caution when a shock hazard is present. Lethal voltage may be present on cable connector jacks or test fixtures.
The American National Standards Institute (ANSI) states that a shock hazard exists when voltage levels greater than 30V RMS,
42.4V peak, or 60VDC are present.
A good safety practice is to expect that hazardous voltage is present in any unknown
circuit before measuring.
For maximum safety, do not touch the product, test cables, or any other instruments while power is applied to the circuit under
test. ALWAYS remove power from the entire test system and discharge any capacitors before: connecting or disconnecting
cables or jumpers, installing or removing switching cards, or making internal changes, such as installing or removing jumpers.
Do not touch any object that could provide a current path to the common side of the circuit under test or power line (earth)
ground. Always make measurements with dry hands while standing on a dry, insulated surface capable of withstanding the volt-
age being measured.
Do not exceed the maximum signal levels of the instruments and accessories, as defined in the specifications and operating
information, and as shown on the instrument or test fixture panels, or switching card.
Chassis connections must only be used as shield connections for measuring circuits, NOT as safety earth ground connections.
If you are using a test fixture, keep the lid closed while power is applied to the device under test. Safe operation requires the use
of a lid interlock.
Instrumentation and accessories shall not be connected to humans.
Maintenance and service
Inspect the connecting cables, test leads, and jumpers for possible wear, cracks, or breaks before each use.
Before performing any maintenance, disconnect the line cord and all test cables.
Cleaning
Keep the connections free of contaminants (such as dirt, oil, etc.) in order to maintain maximum insulation resistance. If the
connections become contaminated, clean them thoroughly with methanol and allow them to dry completely before use.
Before you install your STP-36CJC
CAUTION
Before you make any connections from an STP-36CJC to the KPCI-3108/7 in your com-
puter, make sure that power to your computer and any accessories is OFF.
Remember the following precautions when connecting any hardware to your system:
• Do NOT connect the STP-36CJC to voltages above those tolerated by the KPCI-3108/7. Although the STP-36CJC is
rated for 60 volts peak-to-peak, the KPCI-3108/7 is rated for a lower voltage. KPCI-3108/7 analog inputs can only tol-
erate 35 volts peak without damage.
• Do NOT mix your data acquisition inputs with the AC line, or you risk damaging the computer. Data acquisition systems
give users access to inputs of the computer. An inadvertent short between data and power lines can cause extensive and
costly damage to your computer. The manufacturer can accept no liability for this type of accident. To prevent this prob-
lem, use the following precautions:
–
Avoid direct connections to the AC line.
–
Make sure all connections are tight and sound so that signal wires are not likely to come loose and short to high
voltages.
–
Use isolation amplifiers and transformers where necessary.
