OWON HDS1021M User Manual
Page 12
OWON HDS1021M Handheld DSO & DMM 2-Safety Information
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Voltage ratings that are mentioned in the warning are giver as limits for “working
voltage”. The represent V ac rms (50-60Hz) for AC sine wave applications and as V dc
for DC applications. Overvoltage Category Ⅱ refers to local level , which is applicable
for appliances and portable equipment .
Only qualified technical personnel are permitted to perform maintenance.
Pay attention to the nominal values of all terminals: To avoid fire or electric shock, please keep
a watchful eye on all nominal values and marks specified for this product. Before any connection
performed on this product, carefully read the user’s manual of the product for further information
of nominal values.
No operation is allowed without the instrument cover plate: If the cover plate or panel has
been removed, do not perform any operation on this product.
No touch is allowed on bare conductors: When the product is powered on, do not touch any bare
joints or parts of the scope meter.
Operation is prohibited in case of any undetermined failure: When in doubt any damage on
this product, consult the qualified personnel for checking on it.
Keep ventilation in good condition: Refer to the user manual for detail installation instructions
in order to fix this product correctly and provide it with good ventilation conditions.
No operation is allowed under a humid environment.
No operation is allowed under an explosive environment.
Keep clean and dry on the product surface.
The method which stipulated according to the factory does not use the equipment, possibly can
damage the protection which the equipment provides.
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