Fluke 8845A, User Manual

Page: 53 / 103

Front-Panel Operation
Using the Analyze Functions
3
3-11
2. Press the
MORE
soft key.
3. Press the
HIGH INPUT Z
soft key.
The soft key label becomes highlighted to indicate high input Z is activated. Press the
soft key again to disable the function.
Using the Analyze Functions
The Meter is capable of performing mathematical operations with measured values, as
well as tracking a series of measurements. With the exception of Diode Test and
Continuity, all Meter functions work with all analysis functions. The mathematical
functions include statistics, limits, offset, and mX + b. Meter measurement tracking is
performed through the TrendPlot and Histogram functions.
To access the analyze functions press
J
.
Collecting Statistics on Measurements
The statistical analysis function displays the minimum and maximum measurements of a
series of Meter measurements. The Meter also calculates an average and a standard
deviation value for the same measurement series. This function also provides control over
the starting and stopping of the measurement series.
Starting the Measurement Collection
To start the statistics process:
1.
Press
J
to display the Meter’s analysis menu.
2. Press the
STATS
soft key.
The Meter starts collecting data immediately. Individual readings are never stored in
the Meter, but each reading is added to the Average and Standard Deviation
calculation. At the same time, the measured value is compared to the values stored in
the minimum and maximum registers, and overwrites one of these values if it is
lower than the minimum value or greater than the maximum value.
While a series of measurements are being collected, the process can be stopped by
pressing the
STOP
soft key. To start calculations on another series of measurements,
press the
RESTART
soft key.
Reading the Min, Max, Std. Dev. and Avg. Values
As the measurements are collected, the display is continually updated with the latest
statistical data as shown below.
F1 F2 F3 F4 F5
caw03.eps
The minimum, maximum, average, and standard deviation is displayed along with the
number of measurements the statistics were calculated on.