Hach-Lange SD900 User Manual - Manual (Page 36)

1. Select PROGRAM SETUP>MODIFY SELECTED>ADV SAMPLING from the main menu.
2. Select VARIABLE INTVL>ENABLE.
3. Enter the time or count interval between each sample cycle and push ENTER to save the interval.
Up to 99 intervals can be entered.
Timed bottle sets
The timed bottle option makes a single sampler operate like multiple samplers. This option is useful
for situations such as high flow versus low flow days. The sampler is configured to start a sampling
program in multiple parts. The first part of the program starts for a user-specified time interval. The
second part then operates for a user-specified time interval, followed by the third part, etc.
The sample bottles are also divided into multiple sets. The first set of bottles is assigned to part one
of the sampling program. The second set of bottles is assigned to part two of the sampling program,
etc.
A timed bottle program can run at the same time as the storm program, setpoint sampling and
variable intervals.
When enabled with variable intervals, the timed bottle option will collect samples in each timed bottle
set based on the specified variable intervals. When a timed bottle set switch occurs upon expiration
of the trigger time, the variable interval index is reset.
Note: Timed bottle can be enabled only if the sampler is configured with multiple bottles, non-composite mode and
the distribution mode is set to Bottles/Sample.
1. Go to PROGRAM SETUP>MODIFY SELECTED>ADVANCED SAMPLING.
2. Select TIME BOTTLE>ENABLE.
3. Enter the number of samples to be collected in each timed bottle set.
4. Select one of the timed bottle trigger time methods.
Option Description
24 HR FORMAT The time that must expire every day before one bottle set switches to the next bottle set.
DURATION As long as the controller is not inhibited, the trigger timer starts when RUN is pushed and
START is selected.
The bottle set size is shown.
5. Select when the program will stop.
Option Description
CONTINUOUS The program must be stopped manually.
END AFTER LAST The program stops when the last sample is collected in the last bottle of the last timed
bottle set.
Note: If Take 1st Sample is set to IMMEDIATE on the controller, the first sample of every timed bottle set is
taken immediately. If Take 1st Sample is set to AFTER THE INTERVAL, the first sample of every timed bottle
set is taken after the first interval.
Maintenance
D A N G E R
Multiple hazards. Only qualified personnel must conduct the tasks described in this section of the
document.
34 English