Acuity AccuRange AR1000, Руководство пользователя

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AR1000 User’s Manual
Rev 1.7 1/10
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ft/sec (4 m/sec). For higher rates of measurement, preceding measured values will be
included in the process to calculate a currently measured value.
8.1.5. Hardware Trigger Mode (DF)
This serial command enables the Trigger input to cause single sample to be measured and
outputs to be generated. The time to measure may also be limited by setting the ST parameter
to a desired value. The maximum suggested trigger is 3.5 Hz (with ST1).
See section 9.2 for Trigger Delay and Edge command (TD) parameters.
Turn the Trigger Mode off when using DF (TM0 x – see section 9.3).
8.1.6. Take Single Sample (DM)
On receipt of this command, a single sample to be measured and outputs is generated. The
time to measure may also be limited by setting the ST parameter to a desired value.
This command does not change any configuration settings.
8.2. Averaging Function (SAx)
Factory default setting is 1.
The SA function commands the sensor to output the average value of the previous 1 to 20
measured values (parameter x has allowed values of 1..20).
Calculation is based on this formula.
8.3. Set Measurement Time (STx)
Factory default setting is 0. This setting affects DT, DS, DF and DM measurement modes.
The ST command allows users to manually set the sample period for the AR1000.
The time required for the AR1000 to take a measurement depends on the selected measurement
mode. Generally, the poorer the surface reflectance of a target, the longer the AR1000 will take to
determine its distance. For example, if error message E15 is output because of poor reflectance
and insufficient time to measure, the ST setting should be increased.
Available ST value range: 0 to 25
x = 0 Measurement time is automatic depending on returned signal. The smallest time
possible for attaining a quality measurement is used. The minimum sample
period with ST0 is 240 ms and the maximum sample period is 6 seconds..
x = 1..25 Measurement time is set approximately to:
x * 240ms for DT mode
x * 150ms for DS mode
One use for the ST command is to reduce the data volume or rate by increasing the time per
measurement.