Emergency Events; Solving Problems - Chroma 19071 User Manual

Remote control system
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This system is capable of remote control. Usually it uses external control signal to do the
high voltage output control. For your safety and to prevent accidents, the following
principles of control must be performed accurately. Do not allow any unexpected high
voltage output to cause any hazards. When the system has high voltage output,
operators and other personnel are not allowed to touch the DUT, test cable and probe
and output terminal, etc.
Turn the power switch on or off Attention
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The product should be so positioned that the power switch can be easily reached by the
operator during emergency. Once the power switch is cut off, wait a few seconds to turn it
on again. Do not turn on/off the power switch repeatedly to avoid causing any errors. It is
very dangerous to do repeating power on/of in high voltage output state.
The high voltage output terminal cannot connect to any objects during power on
or off to avoid hazards caused by abnormal high voltage output.
Miscellaneous notices
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Do not short circuit the instrument output line, grounding line, transmission line, or other
connector grounding line, and AC source to avoid the entire test device being charged to
a very dangerous voltage. To short circuit the High Voltage Output Terminal and
Common Test Terminal, the instrument chassis must be grounded to earth first.

3.1.2 Emergency Events

Emergency management
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In the emergency situations of electric shock, DUT on fire or system on fire, follow the
steps below to avoid causing bigger hazards.
•
First, cut off the power switch.
•
Then, unplug the power cord.

3.1.3 Solving Problems

When problem happens
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The problems in the following conditions are very dangerous. The output terminal may
still have high voltage output even the [STOP] button is pressed, so you need to be very
careful.
•
The DANGER indicator still lights up after the [STOP] button is pressed.
•
There is no reading on voltage meter, however the DANGER indicator is lit.
When any of the above conditions happens, turn off the power and unplug the AC
power cord. Do not use it again as the failure is very dangerous. Send it back
Chroma or dealer for repair and services.
DANGER indicator failure
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If you press the [START] button and the voltage meter shows readings but the DANGER
indicator is still off, it means the indicator may be failure. Turn the instrument off and
replace it immediately, then return the malfunction device to Chroma or dealer for repair
and services.
Notices when operating the instrument of long duration under normal condition
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If the setting high limit closes to the rated value, pay attention to the temperature
changes. Stop using it if the ambient temperature is over 40°C. Wait until the
Installation and Maintenance
3-3