D&R HYBRID-1 Manuel de l'utilisateur - Page 11
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PRODUCT SAFETY
This product is manufactured with the highest standards and is double checked
in our quality control department for reliability in the "HIGH VOLTAGE" section.
CAUTION
Never remove any panels, or open this equipment. No user serviceable parts
inside. Equipment power supply must be grounded at all times.
Only use this product as described, in user manual or brochure.
Do not operate this equipment in high humidity or expose it to water or other
liquids. Check the AC power supply cable to assure secure contact.
Have your equipment checked yearly by a qualified dealer service center.
Hazardous electrical shock can be avoided by carefully following the above
rules.
PLEASE READ THE FOLLOWING INFORMATION
Especially in sound equipment on stage the following information is essential to know.
An electrical shock is caused by voltage and current, actually it is the current that causes the shock. In practice the
higher the voltage the higher the current will be and the higher the shock. But there is another thing to consider and
it is resistance.
When the resistance in Ohms is high between two poles, the current will be low and vice versa. All three of these;
voltage, current. and resistance are important in determining the effect of an electrical shock.
However, the severity of a shock primarily determined by the amount of current flowing through a person.
A person can feel a shock because the muscles in a body respond to electrical current and because the heart is a
muscle it can affect, when the current is high enough.
Current can also be fatal when it causes the chest muscles to contract and stop breathing. At what potential is cur-
rent dangerous. Well the first feeling of current is a tingle at 0.001 Amp of current. The current between 0.1 Amp
and 0.2 Amp is fatal.
Imagine that your home fuses of 20 Amp can handle 200 times more current than is necessary to kill. How does
resistance affect the shock a person feels.
A typical resistance between one hand to the other in "dry" condition could well over
100,000 Ohm.
If you are playing on stage your body is perspiring extensively and your body resistance is lowered by more than
50%. This is a situation in which current can easily flow.
Current will flow when there is a difference in ground potential between equipment on stage and in the P.A. system.
Please do check if there is any potential between the housing of the mikes and the guitar synth amps, which will be
linked by your body on stage. Imagine, a guitar in your hand and your lips close to the mike! A ground potential dif-
ference of above 10 volts is not unusual, in improperly wired buildings it can possibly be as high as 240 volts.
Although removing the ground wire sometimes cures a system hum, it will create a very hazardous situation for the
performing musician. Always earth all your equipment by the grounding pin in your mains plug.
Hum loops should be only cured by proper wiring and isolation input/output transformers.
Replace fuses always with the same type and rating after the equipment has been turned off and unplugged.
If the fuse blows again you have an equipment failure, do not use it again and return it to your dealer for repair.
And last but not least be careful not to touch a person being shocked as you, yourself could also be shocked.
Once removed from the shock, have someone send for medical help immediately
Always keep the above mentioned information in mind when using
electrically powered equipment.
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