Hello hhpp,

Please let us know what are the parameters you have put on the BW500.

And please let us know in more details whay you are telling that you can not make span. What is the error message you have on the BW500?

Did you tried initial zero (P377) and initial Span calibration (P388)?

Hope this helps.

Please have a look on this video:

Re test chain - you may be just able to purchase the extra length and connect is. I think it will be hard to return the piece you have. You'll have to remove the shackles for one end of the existing piece and one end of the new one.

Please make sure your wiring is as the drawing attached shows.

Confirm that the BW500 indicates the actual speed of the belt. If in error adjust the speed constant so it reads correctly.

Make sure the shipping stops are removed.Now you will do a zero. Stop the belt. Apply the correct length test chain making sure it is secure. With the belt running perform a series of span adjustments.There should be very very small or no errors between the span checks.

Remove the chain. Recheck the zero. There should be small or no error. Any large variations in error would most likely be due to conveyor, idlers or alignment.

To prove the calibration, you should then perform at least three material tests. Each test should be about 6 minutes in length. Catch the material and compare. Tests 1 and two to check for consistency. Then make the adjustment. Test three to verify the adjustment.

Then factor the test chain value to the correction.

Did you get test weights with your scales?

As you have 3 MSI idlers, so you need a very high precsion. From data sheet it is +/- 0.125%.

So, there are some points we have to take into account to achieve your target.

Hello partners, and thanks again.

First of all the wiring is according to the drawing (Siemens dealer gave me the same drawing).

The parameters speed are as follows: P14= 1,156 m/s; P15-01=236, 1952;
P18 -01 oscilating between 1,103 to t,176 m/s, I think tha´s fine.

Stops removed I do not know what to think, the test chain is really expensive,
test weights are much cheaper ( test chain like 2000 $, test weight 60$ each).

If I decide to buy test weight, what must be the weight?, how many pieces?

At the beginning I used the test chain (the smaller one) for span calibration with the P017=7,62 Kg/m.

In those time I think that everything was fine, I did three times span and the counts were similar.
Then I decided to run the conveyor with material to the mill, the results were really bad
because it was reading much more rate than the real rate ( for instance reading 50 t/h when there were just 20 t/h). After this problem the only Think I could do was the test material P019.
During the test I found out that the BW500 was reading more than the real rate.
So doing and doing the material test I finally found that the P017 was really high. With P017=4,47 the BW500 was just fine ( for instance 500 Kg load(real),
( first test totalizer 502, totalizer=409Kg and so on).

Since then I have been working like that, but I do not know if What I did was really right.Is it really necessary to do 6 minutes of test?, what weight should I use?I been doing the test with 400 Kg (blinker),

I mean putting load over the belt and catching to compare the total weight with the totalizer ( 5 or 6 tests) .

the problem is that I have been doing this in T units, so the totalizer shows 0,400 t.

Is it possible to do the test material in Kg units, and then change to T?

I do not remember that I said 60 tph (the max. is 90 tph) please give a light.

You mean that I could do the balancing with my test chain? How?

Yesterday I saw another problem, Let´s say that the belt conveyor is running with 40 tph, then suddenly the feeder stops and the belt conveyor is running empty, but the BW500 does not show “0” immediately , it takes like 5 minutes go to “0”. How could I solve this problem?

Thanks again

Hp.