ADM-860C 04/14/0816
5.0 USING THE AIRDATA MULTIMETER
5.1 GENERAL USE
The ADM-860C keypad has eight keys, two of which are dual-purpose keys. The dual-purpose keys are
OFF/ON and CLEAR/STORE. The functions shown in the lower, dark colored section of these keys may be
activated by pressing the desired key. The functions in the upper, silver colored sections of the keys are
accessed by first pressing the SHIFT key, then the key of the desired function.
Press the ON key to turn the meter on. The meter will display a row of pixel blocks to test the display, and will
then display AUTO ZERO while performing a brief internal calibration test.
The MODE key may be pressed repeatedly to select one of the following measurement modes: temperature,
VelGrid velocity, AirFoil probe velocity, pitot tube velocity, differential pressure, absolute pressure. Selecting
the FlowHood air flow mode is discussed in the next paragraph. When a mode is selected, the meter will briefly
display the mode, followed by a two-letter symbol for the units to be used, and then display READ. For
example, if the mode selected is pitot tube, the message would read PITOTUBE briefly, followed by FP: READ.
If the FlowHood flaps plug has been plugged into the meter, the meter will initialize in the FlowHood
measurement mode, and will display FLO-HOOD briefly, followed by CF: READ. Press the Mode key
repeatedly while the flaps plug is connected to cycle the meter through the only measurement modes which are
appropriate when the meter is used on the FlowHood assembly. These modes are temperature, absolute
pressure and air flow.
Press the READ key to take a reading in the selected mode. The meter will briefly display the selected function
again, followed by the measurement result. Pressing the READ key again will trigger another measurement,
which will clear all previous data from the display and display the new result.
The display has a back-light for use in low-light conditions. The back-light may be turned on or off by pressing
the ON/OFF key while the meter is turned on. The display will read LIGHT ON or LIGHT OFF as appropriate.
The third character (colon) in each READ display is replaced by a schematic light symbol (
') when the light is
on.
Note that using the back-light significantly increases the drain on the batteries and reduces operating time
(continuous reading operation) by about 50 percent. The back-light may not be turned on when the battery
charge is very low. The display will read NO LIGHT/BATTERY/TOO LOW.
The back-light will turn off automatically if the meter has not been used for several minutes. Press any key to
turn the light back on.
The meter is turned off manually by pressing the SHIFT key, and then pressing the OFF key. The meter will
turn itself OFF automatically to save battery power if the meter has not been used for several minutes, unless
there are stored readings in memory or the meter is in TREND mode.
The meter saves any readings stored in memory, the measurement mode (pitot tube or differential pressure,
for example) and the type of units (English or metric) during a normal shut-down, and will default to the stored
settings when turned on again. The last reading stored in memory will be displayed.
Information stored in memory will be saved in blocks of 50 readings if the meter must be reset while readings
are in memory. If the meter was turned off, then on again, while readings were in memory, but prior to resetting
the meter, all readings saved prior to turning the meter off will remain in memory after the meter is reset.
The AA-NICAD batteries supplied with the meter are capable of supplying power for more than 3000 readings
after one 10-hour charging period. When the batteries are nearing the end of their useful charge, the meter will
display LOCHARGE and the symbol of a discharged battery cell will appear in the third block of the displayed
reading. The meter will not display LOCHARGE again, but the symbol for the empty battery cell will remain on
the display. Battery charge may be conserved by keeping the back-light turned off and turning the meter off
between reading sessions.
To Next Page
Loading...
Need help?
General
