Summary Of Power-On Options; Digital And Analog Displays - Fluke 87 TRUE RMS MULTIMETER User Manual

C
Relative Readings
Press Cto enter the Relative mode, zero the
display, and store the displayed reading as a
reference value. The relative mode annunciator ( ) is
displayed. Press Cagain to exit the relative
mode.
In the Relative mode, the value shown on the LCD is
always the difference between the stored reference
value and the present reading. For example, if the
reference value is 15.00V and the present reading is
14.10V, the display will indicate -0.90V. If the new
reading is the same as the reference value, the
display will be zero.
F
Frequency Counter Mode and Duty
Cycle
Press the Fto select the Frequency Counter
mode; press again to select duty cycle (the alternate
counter function); press again to exit. The analog
display does not operate in either the Frequency
Counter mode or duty cycle.
In Frequency Counter mode, the Hz annunciator is
displayed. The frequency function autoranges over
five ranges: 199.99 Hz, 1999.9 Hz, 19.999 kHz,
199.99 kHz, and greater than 200 kHz. The RANGE
button manually selects the voltage or current input
range. If duty cycle is selected, readings from 0.1
through 99.9 are displayed. The "Hz" annunciator
turns off and "%" turns on.
Power-On Option: High Input Impedance Mode
The input impedance of the l function (400 mV
range) is changed from 10 megohms to greater than
4000 megohms.

Summary of Power-On Options

You can select a number of options each time you turn the
meter on. These power-on options (also listed on the rear
of the meter) are selected b holding down one or more of
the pushbuttons for approximately 2 second while turning
the function switch to any ON position. All power-on option
are only disabled when the rotary switch is turned to OFF.
Each power-o option is discussed in detail under
"Pushbuttons" and summarized in Table 4.

Digital and Analog Displays

Items 14-19 describe the digital and analog displays and
LCD annunciators.
How to Use the Meter
13