Select The Sample Volume - Hach AS950 Operation Manual

Option Description
Time Collects a sample at two or more time intervals. Select this option for time-weighted sampling.
Table
Time Intervals—Selects the number of time intervals. Edit Intervals—Configures each time
interval.
Example: The time intervals selected are 50, 70 and 100 minutes. The Take First setting is set
to After Interval. The Sample End setting is set to None (continuous sampling). The sampler
collects a sample after 50, 120, 220, 270 and 340 minutes and so on after the program starts.
When the Sample End setting is set to 6 samples, a sample is collected after 50, 120, 220, 270,
340 and 440 minutes after the program starts and then the sampling program is complete and
stops.
Flow Collects a sample at two or more flow intervals. Select this option for flow-weighted sampling.
Table An external flow meter or an optional flow sensor is necessary. Refer to the sampler
documentation to connect a flow meter or flow sensor.
Flow Source—Selects the source of the flow measurement signal: AUX I/O port (e.g, AUX-mA),
sensor port (e.g., Flow 1) or the optional IO9000 module (e.g., IO 1). A flow measurement
supplied through a sensor port or the IO9000 module is only available for selection if the flow
measurement is recorded to the data log. Refer to
—When enabled, collects a sample even if the flow is lower than estimated. Enter the maximum
time between samples. When a flow-based sample is collected, the override timer is set to zero.
Flow Intervals—Selects the number of flow intervals. Edit Intervals—Configures the flow
intervals. Take First—Sets the first sample to be collected immediately or collected after the first
interval.
Example: The flow intervals selected are 50, 70 and 100 gallons. The Take First setting is set to
After Interval. The Sample End setting is set to None (continuous sampling). The sampler
collects a sample after 50, 120, 220, 270 and 340 gallons and so on after the program starts.
When the Sample End setting is set to 6 samples, a sample is collected after 50, 120, 220, 270,
340 and 440 gallons after the program starts and then the sampling program is complete and
stops.
Event Collects a sample when one or more of the selected channel alarms occur. Select this option for
upset sampling.
Event Type—Selects the type of event. Options: Setpoint. Event—Selects the channel alarm(s)
for the event trigger. To configure more channel alarms, select Add New Alarm and refer to
Select and configure the alarms
when any or all of the selected alarms occur.

Select the sample volume

Select the volume of a sample. For example, set the sampling program to collect 50 mL samples.
1. Push MENU.
2. Go to Programming>Sample Programming>Sample Volume.
3. Select an option.
Option Description
Fixed Sets the sample volume to a fixed quantity, such as 500 mL. Volume—Sets the volume of each
sample (10 to 10,000 mL).
Variable Sets the sample volume to increase linearly as the flow rate increases (or decreases) between the
low flow rate and high flow rate that is entered. An external flow meter or an optional flow sensor is
necessary. Refer to the sampler documentation to connect a flow meter or flow sensor.
Note: The liquid sensor must be enabled.
Flow Source—Selects the source of the flow measurement signal: AUX I/O port (e.g, AUX-mA),
sensor port (e.g., Flow 1) or the optional IO9000 module (e.g., IO 1). A flow measurement supplied
through a sensor port or the IO9000 module is only available for selection if the flow measurement
is recorded to the data log. Refer to
measurement units for flow. Low Flow—Enter the actual flow rate that agrees with 4 mA. Low
Flow Sample—Sets the sample volume to collect when the flow is at the low flow rate. High Flow
—Enter the actual high flow rate that agrees with 20 mA. High Flow Sample—Sets the sample
volume to collect when the flow is at the high flow rate.
For a description of fixed time interval, variable volume sampling, refer to
on page 16.
Configure data logging
on page 12. Event Trigger—Sets a sample to be collected
Configure data logging on page 11. Flow Unit—Selects the
on page 11. Override
CTVV sampling
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