Ametek 7100 Leak Detect Stik Manual de usuario descargar pdf (Pagina 15)

3.3: System Software Setup

Although one frame of data is sufcient to obtain valid product, water, and temperature readings, averaging

multiple frames is generally much more appropriate. This is because all elements in the system are subject

to slight uncertainties and/or the effects of electrical noise or mechanical vibration. This includes the

magnetostrictive wire in the probe, the probe electronics, the transmission wire between the probe and the

console, and the console electronics.

The number of frames of data required for a good probe reading is application dependent. Since the number

of frames of data taken is directly proportional to the console update time, the user should review the system

criterion before implementing a design. For the sake of discussion, 16 frames of data will be taken. The

following table shows the particulars of a console taking in 16 frames of data.

The update time is calculated as:

16 Time Slots

1 Frame

}

{

4.57 Milliseconds

1 Time Slot

}

= 1170 Ms.

update

= 16 Frames x

{

NOTE: This update time does not include the time required to become synchronized. Up to one additional

frame is necessary to synchronize making the total 1.24 seconds.

The required memory is calculated as:

15 Pulse Pairs

1 Frame

}

{

3 Bytes

1 Pulse Pair

}

= 720 Bytes

Memory Bytes

= 16 Frames x

{

The user will want to congure the system based on individual requirements for update time and memory

space. Readings are more precise when more frames are read but more time and memory are required.

Parameter Result Notes

Frames Read 16 16 Frames as dened

Pulse Pairs Read 240 16 Frames x 15 Pulse Pairs/Frame

Product Pulse Pairs 96 16 Frames x 6 Pulse Pairs/Frame

Water Pulse Pairs 16 16 Frames x 1 Pulse Pairs/Frame

Temp. Pulse Pairs 128 16 Frames x 8 Pulse Pairs/Frame

Pause Pulse Pairs 0 NO PULSE DURING PAUSE

Console Update Time 1.17 Seconds See Below

Required Memory 720 Bytes See Below

1 2 ... 10 11 12 13 14 15 16 17 18 19 20 21 22

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