Manning YB8, Руководство по эксплуатации и инструкция

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MODEL YB 8 PROGRAMMING SECTION
April 1999/Manning Environmental Inc.
3DJH%
*11 Flow Mode - Totalizing Analog Multiple Bottle Composite
This mode is a combination of *05 (the ability to process an analog signal), and *10 (the ability to 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. For more details on how the analog controller works, refer to the analog programming section on
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, the sample collection process is initiated. The unit will advance the spout and
in rapid succession draw and place its samples. The unit will then pause awaiting the next trigger. Every time
the totalized volume matches the Sample Trigger Volume, the sampler will draw its samples, deposit them,
and wait for another Sample Trigger. The sampler will continue this pattern until the total number of 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). The 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 this case maximum and minimum flow) set in the sampler and the 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 that 100,000 gallons is equal to 4mA. If the parameters do not correspond, there is a
risk that the sampler will potentially not scale the analog signal correctly and will subsequently not take
samples at the anticipated or correct instances.
The override time causes the unit to take samples if the Flow Trigger fails to occur. The override time starts
counting down immediately after pressing <START>. If the Flow Trigger is received, the override time resets
and immediately begins to count down again. NOTE: This means that the override time must be longer than
the time it takes for the sampling sequence to complete. If it is not, the override time will elapse while the
sampler is in the sequence causing the sampler to immediately start another sequence after it finishes the
previous one. The time override 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 to or less than the volume of the sample containers divided by the volume of the sample, to
prevent over filling).