ADM-880C 07/20/0926
# Rdg
3 Abs Pres
Avg
28.5 Hg Abs Pres
Sum
85.6 Hg Abs Pres
Min
28.5 Hg Abs Pres
Max
28.6 Hg Abs Pres
Std Dev
0.05 Hg Abs Pres
5.9 MODE KEY
The MODE key is used to access the measurement modes, the TIMED READ setup options, and the CONFIGURATION
setup options for English or metric units, local or standard density, time and date.
5.9.1 MEASUREMENT MODE
The meter has seven measurement modes: differential pressure, absolute pressure, temperature, pitot tube velocity,
VelGrid velocity, AirFoil Velocity, and FlowHood air flow. Press the MODE key repeatedly to scroll through the
measurement modes until the required mode is displayed.
5.9.2 TIMED READING MODE
The TIMED READ mode stores readings at specified intervals. The readings will be stored in the currently active memory
group, unless a new memory group is selected. If a memory group has not been selected, the timed readings will be stored
in memory group “A”. A BEGIN TIME may be specified by the user, or the user may press the READ key while the display
reads TIMED RDY to begin the reading process. A reading INTERVAL may be specified by the user. If the interval is set
to zero, continuous readings will be stored as rapidly as the meter is able to take each reading. An END TIME may be
specified by the user, or, if no end time is specified, the meter will continue to read and store readings until the 2000 reading
storage limit is reached. ALT / ALT may be pressed at any time to exit the TIMED READ setup loop.
It is important to allow enough time to complete the TIMED READ setup before readings are to begin. If the actual time
passes the BEGIN TIME before the setup is complete and the loop is exited, the meter will interpret the BEGIN TIME as
being on the following day.
ENTRY DEFAULT DISPLAY PROCEDURE ALTERNATE PROCEDURE
Interval Length 00:00:15 I Enter interval between
00:00:15 and 24:00:00
Press READ/SELECT to accept 15
second intervals or enter 00:00:00 to
make continuous, no-interval readings
Begin Time Current time Enter begin time Press READ/SELECT to begin readings
when READ key is pressed
End Time Begin Time Enter end time Press READ/SELECT to read until HALT
or STORE FULL
Maximum Readings 2000 M Enter required number
of readings
Press READ/SELECT to read until HALT
or STORE FULL
Setup is begun by selecting the required measurement mode. A new memory group for the TIMED readings may also be
selected as described in Section 5.7.3.1 CHANGE MEMORY GROUP. Press ALT / MODE to access the TIMED READ
selection loop. The meter will display [TIMED s]. Press the READ/SELECT key. The meter will display [00:00:15 I] with
the cursor under the first 0 to the left. The default display is set to an interval of 15 seconds and follows the [HH:MM:SS
I] sequence, where HH is the hour, MM is the minutes and SS is the seconds. The letter I at the right represents
INTERVAL.
Enter the reading interval required by inserting numbers into the display as described in Section 5.1.3 NUMERICAL ENTRY.
The cursor beneath the numbers leads the user through the numerical entries for hours, minutes, and seconds. The
minimum non-zero interval accepted is 15 seconds. The maximum interval accepted is 24 hours. If the user enters all
zeros, the meter will take readings continuously with no pauses between readings, similar to the automatic reading mode.
When the last digit to the right has been entered, the “I” in the display will be replaced by the letter “s”. Press the
READ/SELECT key to confirm the interval time entered and advance to the BEGIN TIME data entry display.
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