Dataman 520 Series - Manual (Page 11)

DATAMAN oscilloscope
User’s Guide
voltage lowers with rising frequency. For example voltage of 100Vp with frequency
200 kHz is the limit. You can always connect voltage with peak value up to 4 times
the input range set (32 time the sensitivity in v/div) independent on frequency.
- never connect voltage lower than –10V and higher than +13V to the external
triggering input (frequency lower than 20 kHz). Over 20 kHz, voltage lower than –
0.5V or higher than +4V is not recommended.
- the measuring ground is common for all of the measuring connectors. The voltage
connected to one of these grounds appears also on the rest two of them. Do not
connect different voltages to the grounds of the measuring connectors. It can destroy
the measuring instrument and/or the measured device.
- when the voltage above 50V is connected to one of the measuring connector’s
ground, touching the rest of two of them can be dangerous for your helth.
- when you connect the voltage higher then 50V to the measuring ground, please be
sure, that the instrument is dry. If you brought the instrument from the colder
environment please wait until it warms up to the temperature of the new environment.
- when the voltage higher than 50V is connected to the measuring ground, for safety
reasons we recommend connect the chassis ground of the instrument (connector on
the back side of the instrument) to the ground of the environment (i.e. main’s ground,
water pipe, etc...). The grounding cable is in the standard package.
- do not connect voltage higher than 500 Vp to the measuring ground. Also the V *
Hz factor should be lower than 50000. For example if the voltage is 500V its
frequency should be lower than 100 Hz.
- never disassemble the device, since there are no user serviceable parts inside.
- touching parts under test with voltage higher than 50V can be dangerous for your
health
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