Fluke 393 - Power; Auto Power Off; Backlight; Power-On Options

CAT III 1500V TRMS Clamp Meter
Before You Start
7
Power
Two AA batteries supply power to the Clamp:
• To turn on the Clamp, rotate the control knob from OFF to a function.
• To turn off the Clamp, rotate the control knob to OFF.
Auto Power Off
The Clamp automatically powers off after 20 minutes of no use. If the Clamp automatically
powers off, turn the control knob to OFF and then to a function to resume operation.
To disable auto power off, see Power-On Options.
Note
Auto power off is always disabled when you use the Min/Max/Avg, Auto Hold,
Fluke Connect, and Data Logging functions.
Backlight
The display on the Clamp includes a backlight that improves the readability in dim work areas.
• 393: Push @ to toggle on/toggle off the backlight.
• 393 FC: Push @ >2 s to toggle on/toggle off the backlight.
The backlight has an auto off feature that turns off the backlight after 2 minutes of no use. To
disable the auto off backlight feature, see Power-On Options.
Power-On Options
Power-on options allow you to customize the controls:
• Disable Auto Power Off
• Disable Auto Backlight Off
• View firmware version and light all LCD segments
• Erase Logging Memory
• Disable Beeper