Auto Backlight Off; Measurements; Manual And Auto Range Selection; Data Hold - Fluke 15B+ User Manual

15B+/17B+/18B+
Users Manual

Auto Backlight Off

The backlight automatically turns off after 2 minutes of inactivity.
To disable the Auto Backlight Off function, hold down D when turning on the Product, until
LoFF shows on the display.

Measurements

To prevent possible electrical shock, fire, or personal injury, disconnect power
and discharge all high-voltage capacitors before you measure resistance,
continuity, capacitance, or a diode junction.

Manual and Auto Range Selection

The Product has both manual and auto range options. In the auto range mode, the Product
selects the best range for the input detected. This allows you to switch test points without
having to reset the range. You can override auto ranging by selecting the range manually.
By default, the Product uses the auto range mode in measurement functions that have more
than one range and shows Auto Range on the display.
To enter the manual range mode, push
Each push of
R
wraps to the lowest range.
To exit the manual range mode, push and hold

Data Hold

To prevent possible electrical shock, fire or personal injury, do not use the HOLD
function to measure unknown potentials. When HOLD is turned on, the display
does not change when a different potential is measured.
To hold the present reading, push

Relative Measurements (17B+ only)

The Product allows relative measurements for all functions except frequency, resistance,
continuity, duty cycle, and diode.
To do relative measurements:
1. With the Product in the desired function, touch the test leads to the circuit on which you
want future measurements to be based.
4
XW Warning
R
increments the range. When the highest range is reached, the Meter
XW Warning
. Push
H
.
Note
for two seconds.
R
again to resume normal operation.
H