Dynasonics TFX Ultra Transit Time Flow Meters Manuel d'utilisateur télécharger pdf (Page 96)

M A L E C ON D U IT FITTIN G

DY NASONICS P/ N: D005-09 38-002

STE E L CITY P/ N: L T7 01*

A R M OU R ED C ON D U IT

DY NASONICS P/ N: D002-1401-003

ANACONDA 1/ 2" UA G R AY *

* OR E Q UIVAL E NT

Figure 73: CE compliance drawing, DC power

K FACTORS EXPLAINED

The K factor (with regards to flow) is the number of pulses that must be accumulated to equal a particular volume of fluid. You

can think of each pulse as representing a small fraction of the totalizing unit.

An example might be a K factor of 1000 (pulses per gallon). This means that if you were counting pulses, when the count total

reached 1000, you would have accumulated one gallon of liquid. Using the same reasoning, each individual pulse represents

an accumulation of 1/1000 of a gallon. This relationship is independent of the time it takes to accumulate the counts.

The frequency aspect of K factors is a little more confusing because it also involves the flow rate. The same K factor number,

with a time frame added, can be converted into a flow rate. If you accumulated 1000 counts (one gallon) in one minute, then

your flow rate would be one gpm. The output frequency, in Hz, is found simply by dividing the number of counts (1000) by

the number of seconds in a minute (60) to get the output frequency.

1000 ÷ 60 = 16.6666 Hz. If you were looking at the pulse output on a frequency counter, an output frequency of 16.666

Hz would be equal to one gpm. If the frequency counter registered 33.333 Hz (2 × 16.666 Hz), then the flow rate would be

two gpm.

K FACTORS EXPLAINED

Page 96 March 2014

1 2 ... 91 92 93 94 95 96 97 98 99 100 101 ... 107 108

Pas de commentaire

Dynasonics TFX Ultra Transit Time Flow Meters Manuel d'utilisateur Page 96