External Connections - pico Technology PicoScope 4444 Guide De Démarrage Rapide

PicoScope USB Oscilloscope
WARNING
To prevent injury or death, the oscilloscope must not be directly connected to
hazardous live signals as defined by EN 61010. To measure such voltages, use
a differential probe specifically rated for this use, such as the PicoConnect 442
1000 V CAT III differential probe.
CAUTION
Exceeding the overload protection range of the oscilloscope and its recommended
accessories can cause permanent damage to the oscilloscope and other connected
equipment.
If the signal voltage exceeds the measurement input range, the PicoScope software displays
the red overrange indicator in the top left corner of the display, with the message "Channel
overrange". A smaller version appears next to the vertical axis of the affected channel. The
waveform will be clipped: no data outside the measurement input range will be shown. In the
software, increase the input range of the affected channel until the indicator disappears.
If the common-mode voltage of the differential input exceeds the scope's common-mode
input range, the yellow common-mode overrange indicator
"Common-mode overrange". Again, a smaller version appears next to the vertical axis of the
affected channel. Exceeding the common-mode input range of the scope causes inaccurate
measurements and can lead to severe signal distortion.
1.2.3 Grounding
WARNING
The oscilloscope's ground connections through the USB cable and through the
ground terminal are for measurement purposes only. The oscilloscope does not
have a protective safety ground.
WARNING
Never connect the ground terminal (chassis) to any electrical power source. To
prevent personal injury or death, use a voltmeter to check that there is no significant
AC or DC voltage between the oscilloscope ground and the point to which you
intend to connect it.
CAUTION
Applying a voltage to the ground input is likely to cause permanent damage to the
oscilloscope, the attached computer, and other equipment.
CAUTION
To prevent measurement errors caused by poor grounding, always use the high-
quality USB cable supplied with the oscilloscope.
2
appears, with the message
Copyright © 2017–2019 Pico Technology Ltd. All rights reserved.
1.2.4

External connections

WARNING
To prevent injury or death, only use the power cord and adaptor supplied with the
product. These are approved for the voltage and plug configuration in your country.
USB connection
Voltage (V)
USB 3.0 5 V
Depending on the combined power requirements of the accessories connected to it, the
PicoScope 4444 can operate with or without a DC power input. If the USB connection alone is
insufficient to power all the accessories connected, the PicoScope software will prompt you to
connect the DC power supply.
1.2.5 Environment
WARNING
To prevent injury or death, do not use in wet or damp conditions, or near explosive
gas or vapor.
CAUTION
To prevent damage, always use and store your oscilloscope in appropriate
environments, as specified below.
Storage
Temperature –20 to +60 °C
5 to 95 %RH
Humidity
(non-condensing)
Altitude
Pollution degree
Quick Start Guide
DC power input
Current (A pk) Total power (W)
3 A 15 W
Operating Quoted accuracy
0 to 45 °C 15 to 30 °C
5 to 80 %RH
N/A
(non-condensing)
Up to 2000 m
Pollution degree 2
DO282-3