Hach AS950 Fonctionnement page 10

Table 6 Configuration options—AV9000S sensor (continued)
Option Description
Advanced Settings
AV9000S Level Filter Settings—Selects the type of filter and the filter size (factory default is
none). Takes the average and/or median of 3, 5, 7, 9 or 11 data points to reduce
noise or outliers. Only the average and/or median values are logged—raw data
values are not logged. A significant delay can occur before sudden changes in
flow are logged, therefore this option is not recommended for stormwater
applications. Options: None, Average, Median or Average and Median.
AV9000S Neg. Vel to Zero—Enable to replace all negative velocity measurements with 0.
Velocity Site Multiplier—The value that adjusts the sensor velocity reading to be the
same as the velocity reading from a different instrument. If not sure, use the
default value of 1.0. Low Level Cutout—Forces the velocity to a substitute value
when the level measurement is below a user-specified value. The value of the
substitute velocity is typically 0. The factory default is enabled at 0.8 inches. Filter
Settings—Selects the type of filter and the filter size (factory default is none).
Takes the average and/or median of 3, 5, 7, 9 or 11 data points to reduce noise
or outliers. Only the average and/or median values are logged—raw data values
are not logged. A significant delay can occur before sudden changes in flow are
logged, therefore this option is not recommended for stormwater applications.
Options: None, Average, Median or Average and Median.
4.1.2.2 Configure the AUX I/O port
Configure the AUX I/O port if the AUX I/O port is connected to a Hach flow meter or third-party
device.
Note: If the optional IO9000 module is connected to the AUX I/O port, refer to the IO9000 module documentation to
configure the AUX I/O port.
1. Push MENU.
2. Select Hardware Setup>AUX and I/O Port.
3. Make sure that Type is set to AUX.
4. Select an option.
Option Description
Mode Selects the AUX I/O port mode of operation. Sample Event—Sends sample
information to a Hach flow meter when a sample is collected: time stamp for the
sample, success or fail and the bottle number. When there are two sampling
programs, the sample information is sent when a sample is collected by either
sampling program. Program Complete—Sends a signal when the sampling
program is complete. Refer to the auxiliary connector information in the
AS950 sampler documentation. When there are two sampling programs, a signal
is sent when both sampling programs are complete.
Flow Selects the type of flow input signal that is supplied by the flow meter to the AUX
Reading I/O port. Options: AUX-Pulse or AUX-mA (4–20 mA).
5. When Flow Reading is set to AUX-Pulse, configure the sampler pacing setting of the external flow
meter. The sampler pacing setting identifies the flow volume that agrees with one pulse (one
count) from the flow meter. Refer to the flow meter documentation.
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