21
value to the standard at the frequency shown on line 3.
This instantaneous readout of percent of standard is
particularly useful where the allowable level must
normally be calculated. If you are using a probe in
memory or have entered a numeric correction factor,
the meter will also be correcting for probe frequency
deviation.
6.
Note that pressing
F3
also clears the maximum value
from the meter's memory.
Bar Graph Ranges
The
Range
key is used to control how the bar graph displays
information. The
digital display is not affected
and the meter
automatically displays a digital value over the probe’s entire
measurement range. There are four available settings:
AUTO,
HIGH, MID,
and
LOW
. The bar graph has 100 divisions.
You will probably find it convenient to use the
AUTO
setting
most of the time, but under a few conditions you may find one of
the three fixed ranges useful. The following table illustrates how
the range setting will affect the bar graph. For simplicity, a
probe with a full scale rating of 100 mW/cm
2
is used as an
example.
Range
Measurement Range
AUTO
As the level increases the bar graph
automatically switches between three ranges:
0.01 to 1, 1 to 10, and 10 to 100.
HIGH
1 to 100
MID
0.1 to 10
LOW
0.01 to 1
If you exceed the upper limit of either the
MID
or
LOW
range, the
bar graph will be replaced with the message
RANGE
OVERLOAD
. The digital display will continue to show the
correct value.
N
ote
The Range Key only
affects how the bar
graph displays
information.
