Toshiba LF434 - Manual (Page 75)

TOSHIBA
6F.8A0 7 7 0.
2. The paiic width cim be set from 0,5ms to 500ms, The puhe width should be set
to less than half of the pulse rale for 1009?) flow Title output. Even if the value
over 500ms is inputted, the pulse width is set to 500ms,
When the pulse width is set to 0 (zero)» it will be autontatically set to half of the
pulse rate for 100% flow rate output. If this calculated value is over lOOms, the
pulse width is set to 100ms.
Example 1
Case Range :36U0m^/h
Counting ratc(pulsc rate) ;Ь.0Ь1 nr^
( I m V s )
the pulse rate for 100% flow rate
: 3600(in‘Vh)/0.001 (m^) =5600000pute/h^l000pulscs,p
ihe pulse rate= Ims
*lhe pulse ffidlh(Hax.) = Ims / 2 = 0. 5ms
ExampleZ
Case Range
Counting ralc(pulse rate)
:5600m Vh (Im'/s)
:1000m^
lhe puise rate for 100% flow rate
: 35t>Ü(m‘Vh)/ lOÜÜ(m^) ^3.6pu!ses/h=0.Ü01pulscs/p
lhe puise rate= lOOOOdOms
Ihc puise widlli(Max.) = lOOOOOOriis / 2 = SODOOOms
but, lhe puise wJdth is 500ms Max.
* t h e p u i s e w i d t h C M a x . ) = SODtiis
RxampJe3
Case Range
Counting ratc(pulsc rate) :1m
Setting pulse width :0ms (automatically set)
:3fi00m7h (ImVs)
the pulse rate for 100% flow rate
: 360n(m^/h)/ l(m^) =3600pulseK/h-lpuJses/p
the pulse rates lOOOms
the pulse widlh(Max.) = lUOOms / 2 = 500ms
but, Ihc pulse width that automatically set is lOOnis Max.
i t h e p u l s e width (Max,) = 1 0 0 m s
3. To operate the totalizer, i: is preferable to set the indicating unit (UNO 1 and/or
UNIT 2) to one of the units appropriate for totalization jus! lo make sure il is
opera ling correctly.
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