Manning YB8, Руководство по эксплуатации и инструкция

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PROGRAMMING SECTION MODEL YB8
April 1999/Manning Environmental Inc.
3DJH%
Analog Sampling Programs
*05 Flow Mode - Totalizing Analog
The *05 mode works much like FLOW mode except instead of relying on a contact closure, the sampler
integrates and totalizes an analog signal (4-20mA) from an external device which
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 by the user, the sample collection process is initiated. The unit will advance
the spout, take a sample and deposit it in the first bottle. Every time the totalized volume matches the Sample
Trigger Volume, the sampler will take a sample and deposit it, and then move to the next bottle in sequence.
The sampler will continue this pattern of depositing a sample in each bottle, 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.
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.
Display on LCD Explanation
SAMPLER READY
04/30 04:30:02
This display indicates the sampler is ready to program and displays
the current time. Press the
*
key to begin programming.
ENTER * MODE
__ __ 04:30:02
The sampler is now prompting for a star mode to be input. Enter the
numbers which represent the star mode of choice, in this example 05,
and press <ENTER>.
MAXIMUM FLOW RATE?
__ __ __ __ 04:30:02
Input the 4 most significant digits of the Maximum anticipated flow
rate. Since the unit of measurement is generic it can stand for any
volume/unit of time. If the flow rate is 40, it could be entered as:
4000, 0400, or 0040. The decimal point is implied, in each case, so
be consistent with all entries. Rate must be in units per minute.
MINIMUM FLOW RATE?
__ __ __ __ 04:30:02
Enter the 4 most significant digits of the Minimum anticipated flow
rate. The same criteria apply to this input as to Maximum Flow
Rate.
FLOW MULTIPLIER?
__ __ __ __ 04:30:02
The Flow Multiplier is used to scale the Maximum & Minimum Flow
Rates. If the Max flow rate is 40,000, enter it as 4000 (first 4
significant digits). The user would then enter a Flow Multiplier of 10
(4000 x 10 = 40,000) to have the unit scale the flow rate as 40,000.