Hach-Lange Sigma SD900 Portable - Manual (Page 55)

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Advanced sampling
5.3.3 Operate from external signal (setpoint sample)
The setpoint sample option starts and stops the sampler after
receiving a signal from an external device such as a flow meter.
The current status indicates when the sample program is being
inhibited by an external device.
Note: Setpoint and stormwater sampling cannot be enabled at the
same time.
Procedure:
1. Select PROGRAM SETUP > MODIFY SELECTED > ADV SAMPLING
from the main menu.
2. Select SETPT SAMPLE > ENABLE .
3. Select one of the setpoint options:
• START ON SETPT —starts a sample program when the
signal is received, ignoring all future transitions, and
continues until the program is complete.
• START/STOP —starts a sample program when the signal is
received and stops the program when the signal is no
longer received.
4. Enter a delay time in hours and/or minutes that must expire
before the sample program starts. The delay time will begin
when the external signal is received. The program will begin
after the delay time has passed.
5.3.4 Set multiple start and stop times
The start/stop time option creates an intermittent sampling
schedule. The program begins sampling at the first start time and
continues until the first stop time. Up to 12 start and 12 stop times
can be specified.
Procedure:
1. Select PROGRAM SETUP > MODIFY SELECTED > ADV SAMPLING
from the main menu.
2. Select STRT/STOP TIME > ENABLE .
3. If the sample program is configured for multiple bottles, select
ENABLE to start sampling at bottle 1 when each start time is
reached. Select DISABLE to continue the distribution sequence
from the last stop time.
4. Enter the time (24 hour) and date for the first start time.
5. Enter the time (24 hour) and date for the first stop time.
6. Repeat steps 4 and 5 until all start and stop times have
been entered.