Monitoring Modes; Monitor Key; Displaying Signal Frequency; Displaying Standard Deviation - Fluke 8508A User Manual

Monitoring Modes

Monitor Key

Press the
Monitor

Displaying Signal Frequency

When measuring AC voltage or current, select the
corresponding to the rms value shown on the main display. The response rate for the
function frequency measurements can be set in the
is not selected, the frequency measurements are made with a 1 s response rate at a 6.5-
digit resolution, otherwise all frequency measurements are made with a 50 ms response
rate at a 4.5-digit resolution. The 1 s response rate will slow down the

Displaying Standard Deviation

Press the key to calculate and display the population standard deviation of a block of
Devn
readings.
The population standard deviation is calculated as
For the standard deviation of a rolling block of readings the
configured and selected from the
For the standard deviation of a fixed block of readings the
configured and selected from the

Devn Menu

This menu allows selection of the displayed format for the standard deviation.
Displays the standard deviation of the block relative to the block mean.
ppm
Displays the standard deviation of the block as an absolute value.
Abs
key to display
MONITOR
MONITOR menu
menus.
MATH
menus.
MATH
Standard Deviation Menu
STD DEVIATION = xxxxxxxx
Standard Deviation display
menu:
key to display the frequency
Freq
MONITOR CONFIG
n
∑
2
x x
1
n 1
rolling avarage mode must be
AvR
lock avarage mode must be
BlocN b
Making Measurements

Monitoring Modes

adj116f.eps
ACV
menu. When
Fast
reading rate.
ACV
adj146f.eps
adj147f.eps
3
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