Accusonic 8510+ series Reference Manual page 57

7-2 Accusonic Model 8510+ Series Flowmeter
FLOW AVE LVL {0 : 5}
NUMBER OF ACCUM's
AUTO STORE PAR's
REP TIME {0 : 4}
SYSCLK 2, 5, 10 MHz
DISPLAY UNITS 0 : 5
DETECTION METHODS
The time over which the Flow data are averaged.
Applies to the data displayed, logged and output on the analog output.

Set to 0, No time-averaging of the flow data

Set to 1, the flow data are averaged over a period of 1 minute.

Set to 2, the flow data are averaged over a period of 2 minutes.

Set to 3, the flow data are averaged over a period of 5 minutes.

Set to 4, the flow data are averaged over a period of 10 minutes.

Set to 5, the flow data are averaged over a period of 15 minutes.
Number of accumulations of signal waveform for each velocity measurement.
Range 1 to 16. This facility can be useful for increasing the signal/noise ratio.
In high velocity applications, (>10 ft./s, 3m/s)) this parameter should be set to 1,
otherwise signal cancellation can occur.
If the acoustic signal quality is very good, a low value may be used, (1 to 4).
Under adverse noise conditions, set to 8 or more.
The advantage of using a low value is that the measurement cycle is shorter, and a
better "snap-shot" of the flow in the conduit is taken.
Set to 1 normally, so that changed parameters are stored in non-volatile memory
whenever the system is returned to the Measure mode.
If set to 0, changed parameters are used by the system but not stored.
The changed parameters will be lost and the old ones asserted if the power is
cycled.
Sets the time interval between measurements.

Set to 0, the flowmeter meter will run at its maximum rate.

Set to 1, the flowmeter will take readings at 1 second intervals.

Set to 2, the flowmeter will take readings at 2 second intervals.

Set to 3, the flowmeter will take readings at 5 second intervals.

Set to 4, the flowmeter will take readings at 10 second intervals.
Note. If the flowmeter is unable to complete the reading in the time
selected, (because the path lengths are long or too many paths are
selected) then the flowmeter will take the readings as quickly as
possible without attempting to synchronize to any real time.
Sets the sampling rate of the digitizer.

For 1MHz transducers or path lengths less than 50 ft (15m): set to 10.0

For path lengths up to 100ft, (30m) and 500 kHz transducers set to 5.00.

For path lengths up to 300ft, (90m) and 200 kHz transducers set to 2.00.
Note. If using 200kHz transducers, the filter jumpers on the DSP must
be changed.
Selects the characters to indicate the units of the variables displayed on the
optional Liquid Crystal Display. Note this setting does not affect the flow scaling
and only the labels used for the data on the display.
 Set to 0 to display flow in "l/s", level in "m", Volume in Cm, Temp in C.
 set to 1 to display flow in "MLD", level in "m", Volume in ML, Temp in C.
 set to 2 to display flow in "CMS", level in "m", Volume in Cm, Temp in C.
 set to 3 to display flow in "CFS", level in "ft", Volume in CF, Temp in F.
 set to 4 to display flow in "MGD", level in "ft", Volume in MG, Temp in F.
 set to 5 to display flow in "CFS", level in "ft", Volume in AF, Temp in F.
Set to 0, "AUTOMATIC" to enable the flowmeter to use the optimum signal
detection method for the conditions. Used for most applications.
Set to 1, "FIRST NEG" to force the flowmeter to use only detection of the "first