Shortridge Instruments Airdata ADM-870, Operating Instructions Manual

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ADM-870 05/23/08 8
IN: ± nnnnn
Indicates that the result represents a differential pressure measurement (in wc).
Metric Units
BAR n.nnn
Indicates that the result represents an absolute pressure measurement (bar). (One bar = 100 kPa).
/ C: ± nnn.n
Indicates that the displayed result represents a temperature measurement ( / C).
LS:
c
± nnnn
Indicates that the result represents an air flow measurement (L/s). "C" indicates that the result has been
compensated for backpressure effects.
LS:
u
± nnnn
Indicates that the result represents an air flow measurement (L/S). "U" indicates that the result has not been
compensated for backpressure effects.
PA: ± nnnnn
Indicates that the result represents a differential pressure measurement (Pa).
/ S: ± nnnnnn
Indicates that the displayed result represents a velocity measurement (m/s).
4.3 FUNCTION READOUTS
The following prompts and messages are listed in alphabetical order.
8.8:8.8.8.8.8.8
A sequence of eights will be flashed briefly to test the operation of the display each time the meter is turned
on.
ABS PRES
This signal will be flashed when the absolute pressure mode is selected, and also each time the READ key
is pressed when in the absolute pressure mode.
AIRFOIL
This signal will be flashed when the AirFoil probe mode is selected and also upon each subsequent
operation of the READ key.
AUTOSTOR
This message indicates that the meter has been placed in the automatic memory mode, which integrates
the automatic reading function with the sequential storage function, and permits recall of the readings, sum
or average at any point. Press the READ key to initiate the actual reading process. Press and hold the
READ key until HALT is displayed in order to stop the automatic reading sequence.
AUTO RDY
This message indicates that the meter has been placed in the automatic reading function. Press the READ
key to initiate the actual measurement and hold the READ key down to halt the process.
CAL
When the meter is first turned ON, it will perform a self-calibration process that takes a few seconds. The
display will read CAL during this period and the operating controls will be inhibited. No READ operations
or function changes may be made during the CAL period. The meter will also perform a brief CAL cycle
about once every thirty seconds throughout normal operation.
CALC
This message indicates that the measurement sampling period has been completed, and that the
calculations are in process. When CALC has been displayed, the sensors, or the FlowHood, may be
removed from the measurement position without affecting the result.
CF: CORR
This message indicates that the air flow measurement being performed will be backpressure compensated.