Fluke 87 III - Manual (Page 15)

Your Meter’s Features
7
Table 4. Pushbuttons (cont)
Button Function Button Function Page
b
Model 87:
yellow button
b
Models 83,
85: gray
button
Any switch
position Turns the backlight on and off.
For Model 87, hold the yellow button down for one second to enter the
4-1/2 digit mode. To return to the 3-1/2 digit mode, hold the button down
only until all display segments turn on (about one second).
NA
29
T
Continuity
ReE
MIN MAX
recording
Power-up
Turns the continuity beeper on and off.
On Model 87, switches between 250
µ
s and 100 ms or 1 s response
times.
Disables the beeper for all functions.
14
30
NA
C
(Relative
mode)
Any switch
position
Power-up
Stores the present reading as a reference for subsequent readings. The
display is zeroed, and the stored reading is subtracted from all
subsequent readings.
For Models 83 and 85, enables zoom mode for the bar graph.
32
32
F
Any switch
position
Power-up
Starts the frequency counter.
Press again to enter duty cycle mode.
Provides >4000 M
Ω
input impedance for the 400 mV dc range.
25
27
NA