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Toshiba – Toshiba LF494 User Manual

Page 73

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TOSHIBA

6 F 8 A 0 7 7 4

2,

The pulse widlh can be from 0-5mii to MIOtm, The pulse width should be set

to less than half of the pvJse rate for

100

% flow rate output. Hven 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 automatically 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 lOOins.

I'.xa in pic I

Case Range

Counting rate(pulse rate)

:36UUm^7h (ImVs)
:0,U01m^

the pulse ratc for

100

% flow rate

: 360f{mVh)/O.D[)l(m') =3fj00000pulses/h=l000pulsefi/p

the pulse ratc= Ims

* t h e p u l s e w i d t h ( M a x . ) = l n s / 2 = 0 . 5n»s

l£xamplc

2

Case Range

Counting rate(pulsc ratc)

:36ÜümVh (ImVs)

:Ш(Ют^

the pulse rale for

100

% flow ratc

: ЗШ:<пг/Ь) / l()ÍHJ(m") =3.6pulses/h=0.(HJlpulses/p

the pulse rate= lOtHJÜÜOms
the pulse width(Max.) = lÜÜÜÜUÜms / 2 = 500000ms

bul, the pulse width is 500ms Max,
* t h e p u l s e w i d t h ( H a x . ) = 5 0 0 m s

:3fl00m^al (Im^/s)

Examples

Casse Range

Counting rate(pulse rale) :lm^

Setting pulse width :0Tns (autotnaiically set)

the pulse ratc for

100

% flow rate

1

350C

the pulse rate=

10

(Юms

the pulse widih(Max.) = 1000ms

! 2 =

500ms

but, the pulse width that auiomatically set is iDOms Max,

* t h e p u l s e w i d th ( M a x .) - 1 0 0 n s

3, To operate the totalizer, i( is preferable to set the indicating unit (UNITI and/or

UNIT 2) to one of the units appropriate for totalization just to make sure it is

operating correctly.

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