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Custom Modifications
The 9700 is microprocessor-controlled and employs a flexible and expandable
user-interface. New features and operating modes often can be added without
hardware modifications by merely modifying the software contained inside the 9700
- contact Quantum Composers for details.
Safety Issues
Normal use of test equipment exposes users to a certain amount of danger from
electrical shock because testing must be performed where exposed voltage is present.
An electrical shock causing 10 milliamps of current to pass through the heart will
stop most human heartbeats. Voltage as low as 35 VDC or RMS AC should be
considered dangerous and hazardous since it can produce a lethal current under
certain conditions. Higher voltages pose an even greater threat because such voltage
can more easily produce a lethal current. Your normal work habits should include all
accepted practices that will prevent contact with exposed high voltage, and those that
will steer current away from your heart in case of accidental contact with a high
voltage. You will significantly reduce the risk factor if you know and observe the
following safety precautions:
1. Do not expose high voltage components needlessly. Remove
housings and covers only when necessary. Turn off
equipment while making test connections in high-voltage
circuits. Discharge high-voltage capacitors after removing
power.
2. If possible, familiarize yourself with the equipment being
tested and the location of high voltage points. However,
remember that high voltage may appear at unexpected points
in defective equipment.
3. Use an insulated floor material or a large, insulated floor mat
to stand on, and an insulated work surface on which to place
equipment. Make certain such surfaces are not damp or wet.
4. Use the time-proven "one hand in the pocket" technique
while handling an instrument probe. Be particularly careful
to avoid contacting a nearby metal object that could provide a
good ground return path.
5. When testing AC powered equipment, remember that AC line
voltage is usually present on some power input circuits, such
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