X-Stream Operator’s Manual 
WM-OM-E Rev I  49 
The scope’s factory settings result in only two basic scope states: On (LED Green) or Standby 
(LED Off). In this case of Standby (LED Off), the scope is powered off with the exception of some 
“housekeeping” circuitry (approximately 12 watts dissipation). The scope can only be placed in a 
complete power off state by unplugging the instrument’s power cord from the primary power source 
(AC outlet). It is recommended that the power cord be unplugged from the AC outlet if the scope is 
not being used for an extended period of time.  
You have the ability to change the scope original factory settings via the “Power Options 
Properties” menu in Windows by following the path: Settings  Power Options. It is important to note 
that the Windows Power Option named “Standby” provides control of only the scope’s computer 
subsystems (CPU, hard drive, etc.) and does not affect the other subsystems within the scope. In 
general, these other subsystems remain fully powered. For additional information on setting these 
Power Options, see the Windows Help menu or other related technical documentation. In terms of 
control buttons, this scope uses only a power button/switch and therefore references to a sleep 
button are not applicable. 
The scope can always be placed in the Standby state (LED Off)  Power Off (except for some 
“housekeeping” circuits) by pressing and holding in the Standby toggle switch for approximately 5 
seconds. 
Fuse Replacement 
Set the scope’s Standby (power) switch to Standby mode 
(LED off) and disconnect the power cord before 
inspecting or replacing the fuse. Open the black fuse 
holder (located at the rear of the instrument directly to the 
right of the AC inlet) using a small, flat-bladed 
screwdriver. Remove the old fuse, replace it with a new 
5x20 mm “T” rated 10.0 A/250 V fuse, and reinstall the 
fuse holder. 
 WARNING 
For continued fire protection at all 
line voltages, replace fuse with the 
specified type and rating only. 
Disconnect the power cord before 
replacing fuse. 
Calibration 
The recommended calibration interval is one year. Calibration should be performed by qualified 
personnel only. 
Cleaning 
Clean only the exterior of the instrument, using a damp, 
soft cloth. Do not use chemicals or abrasive elements. 
Under no circumstances allow moisture to penetrate the 
instrument. To avoid electrical shock, unplug the power 
cord from the AC outlet before cleaning. 
 WARNING 
Electrical Shock Hazard! 
No operator serviceable parts inside. 
Do not remove covers. 
Refer servicing to qualified personnel.