AMETEK 7100 Leak Detect Stik - Manual (Page 15)

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3.3: System Software Setup
Although one frame of data is sufficient 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
}
x
{
4.57 Milliseconds
1 Time Slot
}
= 1170 Ms. t 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
}
x
{
3 Bytes
1 Pulse Pair
}
= 720 Bytes Memory Bytes = 16 Frames x
{
The user will want to configure 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 defined
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