Teledyne 6712SR - Manual (Page 101)

6712SR Refrigerated Sampler
Section 5 Extended Programming
5-13
conditions becomes true. The default distribution setting for
event-paced sampling is sequential (each time an event occurs,
the sampler takes one sample, placing it in one bottle). However,
any distribution setting may be used.
If you have programmed multiple conditions, and more than one
condition comes true at the same time (within your measurement
interval), one sample will be taken and all conditions that caused
the event will be noted on reports.
Although you can combine flow pacing and all time pacing types
with any distribution, event paced programs by definition use
only sequential distribution. The sampler finishes an event
paced program after depositing a sample in each bottle.
Table 5-3 uses rate of change for the event condition (see step
7). This feature enables the event condition under specific cir-
cumstances.
In the example below, a rate of change is set so that if the level
rises more than one foot in a two hour time period, the event con-
dition would be enabled and a sample taken.
In determining if the rise occurs in this example, the sampler
looks back at the previous two hour time period to see if there is
a rise of more than one foot between any valley (low point) or
peak (high point) within that time period.
Once the condition becomes true (a rise of more than one foot is
noted), the event condition is enabled. It will not be enabled
again unless the condition becomes false, and then true again,
within the two hour time window.
In event pacing, up to three different rate of change event condi-
tions can be programmed (for two-part programs, a total of six
rate of change event conditions can be defined, three for each
part).
5.9.2 Event Paced Sampling This example uses a sampler with an attached 730 Bubbler Flow
Module, Rain Gauge, and an SDI-12 sonde at address 5 with four
parameters.
Table 5-3 Event Paced Sampling
1
UNIFORM TIME PACED
FLOW PACED
EVENT PACED
NONUNIFORM TIME
Select EVENT PACED.
2
EVENT01:
RAIN LEVEL FLOW
TEMP5 pH5 SP_CO 5
DO5 DONE
Select the parameters that will trigger the event. Use the arrow keys to
move through the parameters.
To define the first event for this example, select LEVEL.
3
“LEVEL” CONDITION:
SET POINT
RANGE
RATE OF CHANGE
Choose SET POINT.