Toshiba LF494 - Manual (Page 109)

TOSHIBA
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IÜ.2 Totalizer and Pulse Output
Jb use the totalizer and pulse ouipui for external use, proceed as follows.
Counting Rate and Pulse Width Settings
Set the counting rate (How volume per count) and the pulse width. Refer to 8.2.10,
“Counting Rate”.
* The counting rate should be set so (hat its rate for KM)% flow rate output is
within the range from 3.6 to 3600000 pulses/h. (Note 4*)
*
The pulse width can be set from 0.5ms lo 500ms. the pulse width should be set
to less than half of the pulse rate for lOO^i? flow rale output. (Note 5.)
Set the pulse width in accordance with response time of receiving instruments. Jf the
pulse output is not used, pulse width setting
i s
not needed,
DO function setting
Select DOl as a pulse output contact signal. Refer to 8.2.9, ‘‘Digital f/0” This is not
needed if the pul
5
C output is not used.
DI function setting (Note 1.)
Set one of the Di functions. Refer to 8,2.9, “Digital I/O”
If the type of the flow^meter which has no optional digital input. Typo Specification
Code LF4t)4***l (Ninth column; "I"), select the DI function according to the w^ay
described in the (Note 1.)
Indicating Unit Setting
Select an indicating unit for UNIT 1 and.'or UNIT 2 among units for totalization
(ni\ 1 ,ml ,bbL gal or COUNT). (Note 2)
* lit case of the converter for special specifications (refer to 7,3.3 “Converter for
Special specifications"’), select an indicaiingunit for UMT 1 and/or UNIT 2 among
units for not only totalization (m^ 1 ,ml ,bbl, gal or COUNT) but also Code of
volumctric.( F, R or 13).
Measurement Mode
Sci the operation mode of the system Lo the measurement mode.Refer to 7.3.1, “Mode
Change.’"
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