Fluke 287 Fluke 287 and 289 Multimeter Users Manual - Page 34

Move the menu selector, and place the Meter leads on the voltage to be measured.

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287/289 Users Manual To select another reference value, press the softkey labeled Ref to display a message box with the current reference value. Pressing 7 or 8, scrolls through the nine predefined references: 4, 8, 16, 25, 32, 50, 75, 600, and 1000. Set the reference by pressing the softkey labeled OK. To add a custom reference impedance, see the "Setting a Custom dBm Reference" section later in this manual. A dBV measurement uses a 1 volt reference voltage to compare the present measurement against. The difference between the two ac signals is displayed as a dBV value. The reference impedance setting is not part of a dBV measurement. To make a dBV measurement, position the rotary switch to V or T and place the Meter leads on the voltage to be measured. Next, press the softkey labeled Menu. Move the menu selector to the menu item labeled dBV and press the softkey labeled dBV. The Meter displays the voltage in dBV. To exit the dBV or dBm function, press the softkey labeled Menu followed by the softkey labeled dBV or dBm, respectively. Selecting one of the other modifiers such as ms, %, or CF also cancels dBV or dBm. 24

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Users Manual
24
To select another reference value, press the softkey labeled
Ref
to display a message box with the current reference value.
Pressing
7
or
8
, scrolls through the nine predefined references:
4, 8, 16, 25, 32, 50, 75, 600, and 1000. Set the reference by
pressing the softkey labeled
OK
. To add a custom reference
impedance, see the “Setting a Custom dBm Reference” section
later in this manual.
A dBV measurement uses a 1 volt reference voltage to compare
the present measurement against. The difference between the
two ac signals is displayed as a dBV value. The reference
impedance setting is not part of a dBV measurement.
To make a dBV measurement, position the rotary switch to
V
or
T
and place the Meter leads on the voltage to be measured.
Next, press the softkey labeled
Menu
. Move the menu selector
to the menu item labeled
dBV
and press the softkey labeled
dBV
. The Meter displays the voltage in dBV.
To exit the dBV or dBm function, press the softkey labeled
Menu
followed by the softkey labeled
dBV
or
dBm
, respectively.
Selecting one of the other modifiers such as
ms
,
%
, or
CF
also
cancels dBV or dBm.