Shortridge Instruments AIRDATA ADM-880C, Руководство по эксплуатации

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ADM-880C 07/20/09 20
may briefly display the temperature probe status and the density selection before displaying the measurement result.
Press ALT / OFF to turn the meter off. Turning the meter off will not affect the following settings:
Measurement mode, unless the FlowHood or TemProbe connections have been changed
Units selection (English or metric)
Time
Date
Store mode
Readings in memory
Turning the meter off will reset the density selection to local density, unless readings have been stored in the standard
density mode in the current memory group.
5.2 ALT KEY
The ALT key functions as an alternative function key, an escape key and also may be used to view the battery status and
selections at any time.
5.2.1 ALTERNATE FUNCTION
Pressing the ALT key prior to one of the other function keys, switches that function key into the second or third level loop
accessed using that key. For example, pressing the MODE key accesses the primary selection loop which is the
measurement mode. Pressing ALT / MODE accesses the secondary selection loop which is the TIMED READ mode.
Pressing ALT / MODE / ALT / MODE accesses the CONFIGURATION loop.
5.2.2 ESCAPE
The secondary function of the ALT key serves as an escape key. Pressing ALT / ALT before pressing the READ/SELECT
key will cause the meter to exit a loop and return to the previous settings. Pressing ALT / ALT does not affect the memory
contents. This ESCAPE function is very useful if the user is in the process of selection loop changes and is interrupted.
The user can press ALT / ALT and begin again.
5.2.3 VIEW BATTERY LEVEL AND METER SETTINGS
The battery status and meter mode selections can always be viewed by pressing ALT / ALT. The display will read
[ESCAPE], followed by the approximate remaining battery life: [BATTFULL], [BATT 2/3], [BATT 1/3] or [LOCHARGE]. The
meter will then display the selected measurement mode (for instance, [VELGRID]), and the density selected ([LOCAL] or
[STANDARD]). If the TemProbe is connected, [PROBE] will be displayed, followed by the date and time. If the temperature
probe is not being used during flow or velocity readings, the standard temperature ([STD 70
/ F] or [STD 21.1 / C]) will be
displayed.
5.3 ON/OFF KEY
The ON/OFF key is used to turn the meter on and off, and to control the backlight.
5.3.1 ON AND OFF
Press the ON/OFF key to turn the meter on. The meter is turned off by pressing the ALT key, then the ON/OFF key. The
meter will turn itself off automatically if not used for several minutes.
If the selected measurement mode was temperature when the meter was turned off, and the TemProbe was disconnected
before the meter was turned on again, the meter will initialize in the differential pressure mode. If the meter was in the
FlowHood mode when the meter was turned off, and the flaps jack is no longer connected when the meter is turned on
again, the meter will initialize in the differential pressure mode. The meter turns on in a useful mode rather than one that
would require an immediate warning.
5.3.2 BACKLIGHT
The display has a backlight for use in low light conditions. The backlight may be turned on by pressing the ON/OFF key
when the meter is already on. The meter will briefly display [LIGHT ON]. Press the ON/OFF key again to turn the backlight
off. The meter will briefly display [LIGHT OFF].
Note that using the backlight significantly increases the drain on the batteries and reduces the operating time (continuous
reading operation) by about 50 percent. The backlight may not be turned on when the battery charge is insufficient. The
display will read [NO LIGHT / BATTERY / TOO LOW].
5.4
=
SCAN KEY
5.4.1 SCROLL THROUGH MEMORY - DESCENDING
Pressing the
=
SCAN key scrolls through all the readings in memory in descending order. The scan begins with the last
reading in the most recently saved memory group, and scrolls through all readings in memory. The speed of a scan will