The Display; Detailed Operation - Alnor APM 151 Manual Del Usario

The APM 150 incorporates a custom liquid crystal
display (LCD) to show measured values, units of
measurement, page and line numbers of last data
entered, and an indicator showing if the correction
factor is equal to 1. As a result, measurements
exceeding 9,999 of a given unit of measure will be
displayed in a scientific notation format of XXEY.
The actual reading will be rounded to the nearest
thousand, XX. The Y indicates the number of
With the meter turned on, assemble the hood (see
page 4). The display will show:
• All segments of the display
• The latest software revision
• The type of probe attached (175, 275, 220B)
• Busy message
• An air flow measurement
Note: If the meter displays [
and check the probe connection. If this is the first
time you used the meter, clear the memory (see
page 7).
Check to see if the meter's parameters are set for
your application. The meter always starts
measuring in the SUPPLY mode. To select
exhaust, press the supply/exhaust key ( ). If the
meter is in the exhaust mode, the annunciation
below Ex will be on. If a correction factor is
needed, press the MENU key until [
displayed. Press ↵, then press ↑ or ↓ until the right
value appears, then press ↵. [
displayed. Press ON/OFF to return to the RUN
mode.
To change the units of measure, press the UNIT
] appears. Press the ↑ or ↓ button
key until [
until the annunciation is pointing to the correct
unit. Press ↵.
8
8

THE DISPLAY

DETAILED OPERATION

] turn unit off
] is
] will be
zeros after XX. For example, 12,751 is displayed
as [ ].
The APM 150 is measuring and averaging the
actual value of the reading, not the rounded
scientific notation value. No accuracy loss will be
encountered. When printing the data on the 8521
MicroPrinter or downloading the data to a host
PC, the scientific notation reading will be seen.
To take a measurement, raise the hood assembly to
the diffuser, making certain the hood frame fits
around the entire diffuser and is held tightly
against the ceiling or wall (see page 5). Let the
display settle to a steady reading. Press the HOLD
key (you may use the red button on the right
handle or the HOLD/AVE button on the meter).
The display will flash the measured value. If this
reading is not satisfactory, press the ON/OFF key
to return to the RUN mode without storing the
value. If the reading is satisfactory, press the
HOLD key again to store the value. Repeat this
procedure as many times as needed.
If the data is complete and another set of
measurements is needed, create a new page. To
achieve this, press the MENU key until [
is displayed. Notice the smaller indicator to the
right. This displays the current working page.
Press ↵, the display will automatically increase the
page number. To return to the RUN mode press
ON/OFF.
To examine the stored data, press the MEM key.
The display will show the current working page.
To scroll to any of the stored pages use the ↑ or
↓ key until the desired page number appears, then
press ↵. The display will now show the stored line
number, the value stored and its units. To continue
reviewing the data, press the ↑ key.
]