Mod.BM43
COM
Vers.1.0
16/11/2005
Page 32 of
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2.5.6 Total spreading time, time difference M93
Digit
T o ta l T im e , D e lta
T im e
6 23 , 80 u S , 2 42 , 12 n S
The measurement method is based on time difference, so the time and other displayed
values can identify a correct installation. In normal operating conditions, the time
difference should be smaller that ten percent (10%). If the pipe diameter is small or the
speed is too low, the difference may be a little higher. If the difference (and also flow and
speed) is too high, it means the signal quality is very bad. The reason may be: pipe’s
features, wrong installation or wrong parameters setting.
2.5.7
Relation betw een calculated and measured transit time
To know if the sensors are well mounted, you should calcolate:
TIME – RATE = TOM * 100
TOS
In normal working conditions it should be 100 +/- 3%.
Digit
T O M / T O S * 1 0 0
x x x , x x %
And eventually confirm the right mounting method.
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