Ametek 7100 Leak Detect Stik Manual de usuario descargar pdf (Pagina 11)

NOTE 1: t

s-s

= time from 1st start pulse in one frame to next start pulse in the next frame.

NOTE 2: Start pulse can start anywhere in the 4.5 ms frame. The stop pulse will follow at the correct time.

The t

s-s

is not consistent. The user does not have the 4.5 ms frame as a reference. The user must

use the watchdog timeout during the pause frame to “sync up”. The watchdog timer should be reset

on both the start and stop pulse.

NOTE: Although the timebase is generated with a crystal oscillator, the times shown are NOT exact times.

Also, the initial pulse within a window of the frame does not start at the beginning of the window. See

Section 3.1: Synchronizing with a Watchdog Timer and footnote 3 for more information.

Figure 5: Pause Period Timing

Reset Reset Watchdog Watchdog

4.5mS

s-s

4.5mS

9mS

4.5mS

Product

High Ref

Pause

Temp #1

Water

#15 #16 #1 #2 #3

Figure 4: Start Pulse

1 2 ... 6 7 8 9 10 11 12 13 14 15 16 ... 21 22

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Ametek 7100 Leak Detect Stik Manual de usuario Pagina 11