• If you choose to use a cross-section, you must
then indicate dimensions as follows.
Area:
(Also to review the Area or selected horn)
When selected by pressing the ↵ key, the
following will appear:
• The current units, either ft
• The current horn (if previously used)
• The numeric value of the calculated area.
Note: If you only wanted to review, press the
ON/OFF key.
• If you press the ↵ key, the ↑ or ↓ key (value
change), then the ↵ key, you change the method
of measurement to [
Rectangular:
• After [
] is selected, the display will show
starting X dimension values [
[
] meters. Accepting the X value affects
choice of a volume dimension (e.g. cfm).
• Change these values using ↑ or ↓. Press the
↵ key to accept.
• The next display shows desired Y dimension
values of [
] in inches or [
• Change these values using ↑ or ↓. Press the
↵ key to accept.
Round:
• After [
] is selected, the display will show
starting point diameter values [
or [
] meters.
• Change the value to the necessary diameter using
↑ or ↓. Press the ↵ key to accept.
Horn:
• When selected, use the ↑ or ↓ keys to scroll
through the following options:
—AM100 [
]
—AM300 [
]
—AM600 [
]
—AM1200 [
]
2
2
[
] or m
[
]
].
] in inches or
] meters.
] in inches
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↵
• Press
to select one of these choices.
• To review, see Area.
Data Storage
All measurements stored in the instrument's
memory are recorded on pages. A page is created
whenever:
• the unit of measurement changes,
• or page is selected from the MENU.
For example, if you are measuring feet per second
and decide to take measurements in miles per
hour, a new page will be created.
The APM 150 memory has a total capacity of 100
sets of data. This means you can have one page of
100 lines, or one hundred pages of one line, or any
combination of pages and lines totaling 100
readings.
Each time the HOLD key is pressed for the
"second" time, the instrument will store
measurements and the correction factor. Readings
are stored in battery-backed memory so that
powering off or changing batteries does not erase
readings. These stored readings will remain in
memory until they are cleared or if the instrument
is damaged or malfunctions.
A copy of this data can be obtained if a printer or
computer is attached to the instrument.
If a printer is connected:
• Press the MENU key, then the ↑ or ↓ key until
[
] appears.
• Press ↵ to print the data.
• To escape from the print routine, press and hold
the ON/OFF key until [
press the ON/OFF key to return to the RUN
mode.
To erase stored data:
• Press the CLR key until [
• Push the ↑ or ↓ key until [
• Press ↵ to clear the memory.
Note: Keep in mind that you cannot erase
individual pages. Clearing data erases
every page in the instrument's memory.
] appears, then
] appears.
] appears.
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