Franklin-fueling-systems Colibri CL6 Setup and Operators Guide Manual de usuario descargar pdf (Pagina 29)

To See If a Tank Is Autocal Ready

• Use the previous month’s DIM Reconciliation Report to

look for explanations for the Over / Short status. A typical

tank that needs calibration will show a consistently

high variance, but not very high. If the Daily Variance

is higher than 10% of the sales for that day, then the

problem is probably being caused by something that will

not be resolved by using Autocal.

• Check the Active Alarms and Alarm History for probe

problems on the tank to be calibrated.

• Check the tank setup. Each tank must have its own

Special Tank, and each tank type must be the Special

Tank of the same number (e.g. Tank 1 type = Special 1,

Tank 2 type = Special 2).

• Make sure that the Tank Length (or estimated Length

for berglass) is programmed correctly. If it is not, there

may be a false delivery recorded at the time between

the old tank chart being cleared and the rst point being

put in. To see how to adjust the length of your tank

correctly, refer to the following section called Adjusting

Length rst.

• Are there any known problems at the site in the past that

might effect variance?

• Record the daily usage from the ATG in order to

estimate how long Autocal will take to complete.

• If Autocal has been attempted before, make sure that it

was stopped and that the original tank information was

programmed back in prior to starting Autocal again.

If the above bulleted points have all been addressed, then

you are ready to start Autocal.

Calibration Procedure

FFS recommends that calibration be started with the

tank lled to more than 90% of its total volume, and that

the tank be then allowed to drain down to at least 10% of

its total volume. When the Autocal program senses 80%

volume coverage, it will end automatically, but it can also

be stopped manually at any time.

As long as the coverage is around 70%, it should be

sufcient. The key is that the new tank chart covers the

level range that the tank stays in during normal operation.

Delivery during Calibration

If a delivery occurs during the Autocal process that raises

the fuel level to a point above the calibration starting point,

Autocal will STOP.

Adjusting Length First

If the Tank Length (or estimated Length for berglass) isn’t

programmed correctly, then there may be a false delivery

recorded at the time between the old tank chart being

cleared and the rst point being entered in. Make sure that

your Tank Length is programmed correctly, and refer to the

appropriate section below based on your tank type.

Flat Ends (Steel)

If the ends of the tank are at so that the tank is a true

cylinder, then the ATG should only need to know the

length and diameter and should not need to be calibrated.

Adjusting the Length may correct the problem.

If the Daily Variance is always negative or always positive,

then it is likely that the Length is wrong. Check the delivery

accuracy, and it will likely show an error also, though

probably in the opposite direction of the variance.

If the Daily Variance is consistently NEGATIVE (with

positive deliveries), then the tank is TOO BIG and the

Length should be shortened and vice versa. Adjust the

Length of the tank. As a rule of thumb, calculate the

average variance for the past ve days. Figure out what

percentage of the total tank volume this average variance

is equal to, and modify the length of the tank by the same

percentage. Monitor the Daily Variance of the modied

tank for several days to see what the effect has been.

Dome Ends (Fiberglass)

If the tank is berglass with domed ends, then there is no

set Length. An approximate Length should be calculated

based on the Diameter and Volume capacity of the tank by

using this formula: Length = 231 (4V/πD2) (for metric units

replace 231 with 10,000,000). Enter the Correction Points

from the manufacturer’s tank chart at least every 5 inches

(12.7 cm) - the more points entered the better.

Length and Volume Unknown

If the Length and Volume of the tank are unknown and you

don’t have a tank chart, then the default reference volume

will not be accurate enough. Follow these steps to obtain,

and enter, an accurate reference volume in the tank:

1. Enter an approximate length.

2. Drain the tank completely dry (the product drop in

the next step will be off by whatever amount is not

removed).

3. Drop an accurately measured amount of fuel into

the tank — the more measured fuel added, the

better.

4. Adjust the Length until the ATG reads about the

same amount as was dropped.

5. Enter the amount dropped as the reference

volume when prompted during the Autocal start.

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Franklin-fueling-systems Colibri CL6 Setup and Operators Guide Manual de usuario Pagina 29

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