Keysight DSOX3104T - Maximum Input Voltage at Digital Channels; Environmental Conditions

Reference 24
Keysight InfiniiVision 3000T X-Series Oscilloscopes User's Guide 377
Environmental Conditions
CAUTION
When measuring voltages over 30 V, use a 10:1 probe.
CAUTION
Maximum input voltage at digital channels
±40 V peak
Environment Indoor use only.
Ambient
temperature
Operating 0 °C to +55 °C; non-operating –30 °C to +70 °C
Humidity Operating: 50% to 95% RH at 40 °C for 5 days.
Non-operating: 90% RH at 65 °C for 24 hr.
Altitude Maximum operating altitude: 3,000 m (9,842 ft)
Overvoltage
Category
This product is intended to be powered by MAINS that comply to Overvoltage
Category II, which is typical of cord-and-plug connected equipment.
Pollution Degree The InfiniiVision 3000T X-Series oscilloscopes may be operated in environments
of Pollution Degree 2 (or Pollution Degree 1).
Pollution Degree
Definitions
Pollution Degree 1: No pollution or only dry, non-conductive pollution occurs.
The pollution has no influence. Example: A clean room or climate controlled
office environment.
Pollution Degree 2. Normally only dry non-conductive pollution occurs.
Occasionally a temporary conductivity caused by condensation may occur.
Example: General indoor environment.
Pollution Degree 3: Conductive pollution occurs, or dry, non-conductive
pollution occurs which becomes conductive due to condensation which is
expected. Example: Sheltered outdoor environment.