Manning YB8 - Flow Mode - Totalizing Analog Multiple Bottle Composite

MODEL YB8 PROGRAMMING SECTION
April 1999/Manning Environmental Inc.
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*11 Flow Mode - Totalizing Analog Multiple Bottle Composite
This mode is a combination of *05 (the ability t o process an analog signal), and *10 (the ability t o use
Multiple Bottles per Sample and Multiple Samples per Bottle together). *11 works by integrating and
totalizing an analog signal ( 4-20mA, 0-20mA, 0-1V, or 1-5V DC) from an external device that represents
flow rate. F or mo re details on how the analog controller works, refer to t he analog programming section o n
page 2-12. Since the sampler does not ask for a definition of the volume unit of the flow rate, ANY can be
used, i.e. cubic feet, liters or gallons. Once the unit is programmed, it begins reading the analog signal once
per minute to internally totalize and keep track of the volume. When the totalized flow rate matches the
Sample Trigger Volume entered, t he sample collection process is initiated. The unit will advance t he spout and
in rapid succession draw and place its samples. The unit will then pause awaiting the next t rigger. E very time
the totalized volume matches t he Sample Trigger Volume, t he sampler will draw its samples, deposit t hem,
and wait for another Sample Trigger. T he sampler will continue t his pattern until t he total number o f bottles
the unit is configured for (set in *99) each have a sample placed in them or a bottle full condition occurs.
For example, assume the sampler is configured for 24 bottles and Samples per Bottle is set to 3 (see step by
step programming below). T he sampler, after receiving a contact closure, will in rapid succession place 1
sample in each bottle it is configured for (set in *99). In this case, since the sampler is configured for 24
bottles, a total of 24 samples would be deposited (one in each bottle). After depositing this set of samples the
unit would pause awaiting the next contact closure to place the second set of samples in the bottles (there
would be 48 total samples taken after the second contact closure - 2 in each bottle). After the third set, the
sampler would end the sequence and wait for a new program (there would be 72 total samples taken - 3 in
each bottle).
NOTE: In order for the sampler to correctly scale the analog signal being output from the external device, the
parameters (in t his case maximum and minimum flo w) s et in t he sampler and t he external device must be the
same. This is to ensure that if the external device is reading 100,000 gallons and outputting a 4mA signal, the
sampler will also know t hat 100,000 gallons is equal to 4mA. If the parameters do not correspond, there is a
risk that t he sampler will potentially not scale the analog signal correctly and will subsequently not t ake
samples at the anticipated or correct instances.
The override t ime causes the unit to t ake samples if t he Flow Trigger fails to o ccur. T he override t ime starts
counting down immediately after pressing <START>. I f t he Flow Trigger is received, the override time resets
and immediately begins t o count down again. N OTE: T his means t hat t he o verride time must be longer t han
the time it takes fo r the sampling sequence t o complete. I f it is not, the override t ime will elapse while the
sampler is in t he sequence causing the sampler t o immediately start another sequence after it finishes the
previous one. T he time o verride fills bottles the same way as if a Flow Trigger were received. This will
continue until the maximum number of samples (1-99) have been placed in the bottles (the number of samples
should be equal t o o r less than the volume of t he sample containers divided by t he volume o f the sample, t o
prevent o ver filling).