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
.
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 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
