Hantek DSO-2250 USB User Manual
User’s Guide
DSO-2250 USB
PC Based Digital Oscilloscope
Operation Manual
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Certificate of Product Warranty
This product’s warranty, provided by our company, covers a period of 1 year
form the date of purchase. All faulty parts and/or functions, resulting despite
user’s normal use, will be repaired and/or replaced at no charge during the
warranty period.
However, if any of the malfunctions are caused by user carelessness, inadequate
maintenance, or natural disaster, we will the provide repair and/or replacement
services for a fee regardless of warranty period.
In the event our product does not prove suitable for your application you can
return the product for an exchange or refund. To claim, the product must be
returned in good condition within 14 days. Before returning a product, please
contact and provide us a serial number. The customer is responsible for all
shipping costs.
Products covered by this warranty are limited to those that are registered at the
We headquarter or branch offices and repairs, replacements, or refunds will be
issued according to manufacturer’s discretion. When in need of warranty services,
the purchaser may visit our headquarter or one of our sales offices with the
product or send the product with a detailed description of services required via
postal service to any of our sales offices (the purchaser will be responsible for
packaging, postage, and any postal insurance).Once repair services are completed,
the supplier will return the product to the purchaser (return postage will be paid
by the supplier).
However, if we determined required services to be outside the boundaries of the
warranty coverage, we will first contact the purchaser and provide an estimate of
repair costs and obtain authorization to conduct services before any work is done.
In such a case, return postage along with the repair costs will be billed to the
purchaser when the repaired product is returned.
We do not warrant that the software and the product with which it was supplied
are completely error free or that will function correctly in all operating
environments. It is essential that you, the users, should verify that the software
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and product are functioning to your requirements before relying caused on them
or the data that they generate. We do not accept responsibility for any loss or
injury caused by the use of the product or software. It is the user’s responsibility
to ensure that the product is suitable for the user’s application.
We will not be held legally for any malfunction resulting from user carelessness,
abnormal use, and/or natural disaster. Even if we are in receipt of prior
notification of such dangers, we will not be held legally liable.
Product Warranty Guide
Please read through the ¡°Precautions for Safety¡± carefully to obtain a long and
safe use of this product.
This product has been processed through careful quality control and testing
procedures. Any malfunctions occurring during normal use are covered under the
guidelines of the ¡°Certificate of Product Warranty¡±, which is included in this
Manual.
If you experience product malfunction, please contact our headquarters or any of
our sales offices.
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Precautions for Safety
The following instructions are provided for safe and correct use of the product
and to prevent a potentially dangerous situation or damage in advance. Be sure to
read through them before you use the product.
Recommended Usage Environment
l The ambient temperature and relative humidity should be 0-40℃ and
10-80% respective for the normal operation of the product.
Power Source
l The USB terminal and DSO-2250 USB are connected via a USB cable for
DC +5V power from the PC. The product does not require an outside power
source.
Warning: Be careful not to input excessive power voltage
l The product’s input power capacity is fixed as shown below to prevent
electric shock and/or fire. Please DO NOT use voltage higher than that
prescribed below.
(Warning) Be sure to check the probe attenuation before measuring the
voltage. The voltage that is higher than the maximum input voltage can
cause damage to the device and you. In particular, there is the risk of
an electric shock when measuring high voltage. So you need to pay
extra attention not to have your hand touch the terminal.
l Please eliminate all unused probes or tester leads so that they do not come in
contact with surrounding high voltage parts.
l Make sure that the PC’s power source is grounded.
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Handing Precautions
l The probe ground lead is at ground potential. Do not connect the ground
lead to an elevated voltage. Connect the ground lead of the probe to earth
ground only.
If measuring the floating potential, we will recommend the measurement by
the differential motion method using CH1 and CH2.
l Do not connect or disconnect the product with the probe or test lead which
is connected to a voltage source.
l Do not attempt to operate the product at the situation that a risk of
dysfunction or shock expected to happen.
l Stop using the product immediately when you notice something unusual
about the smell, smoke or sound.
And then remove the USB connection form your computer.
l Keep the product out of the reach of children or those who cannot be trusted
with the use.
l Do not use the product with your hands wet. It can cause an electric shock.
l Do not try the product for the purposes other than those stated.
Usage Location
l If the products crevice is exposed to electric conductors (solids or liquids),
the product will short circuit and possibly create dangers of electric shock or
fire. Please keep this product away form humidity, water, or dust.
l DO NOT use this product near gas as well as other flammable and/or
explosive materials.
l Store the product where direct sunlight can’t reach.
l DO NOT use the product where it’s dirty, other machines are operated, or
there is a high level of electromagnetic waves.
l DO NOT place the product on an unstable cart, stand, or tripod. Such usage
creates the dangers of accident and/or damage to product.
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