Shortridge Instruments Airdata ADM-870, Руководство по эксплуатации

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ADM-870 05/23/08 13
If the meter's full capacity of 100 readings has been reached, STOR FULL will be displayed. Press the STORE
key to alternately display the average and sum, or one of the RCL keys for recall of the individual readings. The
memory must be cleared before a new reading sequence begins.
5.2.2 RECALL
The RCL keys are used to sequentially recall all readings that are in memory, and in general are used after the
STORE key has been pressed. A brief press of a RCL key will advance the display one number at a time.
Holding a recall key down will fast forward or fast reverse the display through all the numbers that are in memory.
5.2.3 DISCARD READING
A displayed reading may appear to be abnormal, may have been taken at the wrong time, or with an improperly
positioned sensor. If a RCL key is pressed while a reading is still on display, that reading will be bypassed, and
discarded, and will not be entered into memory. The interrupted sequence may be resumed by pressing the
READ key. The readings taken after pressing the recall key to discard a reading will be integrated with the
readings already in memory.
5.2.4 CLEAR MEMORY
The memory is cleared by pressing the SHIFT key followed by the STORE key. This sequence removes all
readings from memory. Press the STORE key a second time and a new averaging sequence will be initiated.
NOTE: Readings are still in memory after the SHIFT key has been pressed. Pressing the SHIFT key a second
time will return the meter to the previous mode and the existing readings will remain in memory.
The measurement mode or other conditions may not be changed while the meter is in the memory function. The
meter may not be turned off, either automatically or manually, after the first reading has been placed in memory
unless the SHIFT key is first pressed, followed by the CLEAR key. This feature reduces the risk of accidental
loss of readings from memory.
5.2.5 ERROR
ERROR will be displayed if the TemProbe is inserted or removed during an averaging sequence for flow or
velocity readings. That is, if the first reading in memory was taken with the TemProbe installed, then all following
readings must be taken with the TemProbe in place.
5.3 AUTOMATIC READING MEMORY
The automatic reading function and the memory function may be combined to gain the increased resolution
afforded by the increased time base of the measurement interval. This function permits the operator to store
up to 100 fully automatic , repeated readings for the same function. This measurement and storage process
will continue until interrupted by the operator, or until the meter registers STORFULL at 100 readings.
The auto-reading memory sequence is initiated by first pressing the function and units keys required. Then
press the SHIFT key, followed by the AUTO/READ key, then press the STORE key. The meter will display
AUTOSTOR, at which point the actual measurements are initiated by pressing READ.
The auto-reading memory sequence may be interrupted by holding the READ key down until the measurement
in process has been completed. Release the READ key when HALT is displayed. The auto-reading memory
sequence will be resumed if the READ key is pressed again. When the auto-reading memory sequence has
been completed or interrupted, press the STORE key. The number of readings and the average will be
displayed. Press the STORE key a second time to display the sum of the readings, or press one of the RCL
keys to recall individual readings. This function may be exited by holding the READ key down until the display
reads HALT, then pressing the SHIFT key followed by the CLEAR key.
5.4 SPEED-READ FEATURE Note: Accuracy specifications do not apply to SPEED readings.
The SPEED-READ feature is used for fast automatic readings. This mode may be used for all primary functions
and is especially useful for proportional air balance, which requires that the damper positions be adjusted while
the air flow is being measured at the outlet. One person using the FlowHood set for SPEED-READ, can very
quickly relay the required damper changes to another person who is adjusting the dampers. Damper
adjustments must always be made on a proportional, percentage change basis when using the SPEED-READ
feature, since these readings are not compensated for backpressure.
SPEED-READ is also useful for monitoring or averaging any measurements that are changing rapidly, such as
fluctuating or "hunting" damper or temperature controls. Velocity readings at turbulent locations can also be
quickly averaged by using the memory mode.
SPEED-READ must not be used for tasks which require moving a probe or the FlowHood from one location to
another. Examples of improper uses are pitot tube traverses, preliminary and final outlet readings using the