Hach SD900 Manuel D'utilisation De Base page 18

Time based collection
1. Select or enter the values for each option.
Option
Pacing interval
Take first sample The program starts immediately or after the first interval.
Variable volume
Use variable volume
Sample pacing is constant time variable volume (CTVV).
1. Select or enter the values for each option.
Option
Select unit
Map 4 mA input
Map 20 mA input
Average flow rate
Time volume desired
Collection period
Minimum sample volume If the flow volume is not sufficient to collect this minimum volume, the sample is
Do not use variable volume
1. Select or enter the values for the option.
Option
Take first sample Select whether the program starts immediately or after the first time interval has passed.
Flow based collection
Specify the flow source for flow based sampling:
• Counts—Refer to Use counts for the flow source
• 4–20 mA input—Refer to
Use counts for the flow source
1. Select or enter the values for each option.
Option
Take sample every Collect samples at regular flow intervals, in counts (1–9999 counts).
Overrride time
18 English
Description
Collect samples at regular time intervals, in hours and minutes (0:01–999:00).
Specify whether the sample volumes vary (flow based). If yes, refer to
volume on page 18. If no, refer to
Description
Select the flow units to use.
Enter the flow rate that agrees with 4 mA input.
Enter the flow rate that agrees with 20 mA input.
Specify the average flow rate for the site (1–999,999). The units are specified by
the units selected above.
Specify the total volume to be collected during the sample program
(10–10,000 ml).
Specify the total collection period in hours and minutes (0:01–999:00).
skipped (10–10,000 ml).
Description
Use 4–20 mA input for the flow source
Description
Collect a sample if the flow volume is very low.
Do not use variable volume
on page 18.
on page 19.
Use variable
on page 18.