Toshiba LF434 - Manual (Page 111)

TOSHIBA
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10*2 Totalizer and Pulse Output
To use Ihe totalizer and pulse oulpul for exLcnud use, proceed as follows.
Counting Rate and Pulse Width Settings
Set the counting rate (flow voiiime per count) and the pulse width, Refer lo 8.2,10,
'‘Counting Rate”.
* The counting rate should he set so that its rate for 100% flow rate output is
v-hthin the range from 3,6 to 3600000 puJses/h. (Note 4.)
* The pulse width can be set from 0.5ms to 500ms. the pulse width should be sei
to less than half of the pulse rate for 100% flow' rate output, (Note 5,)
Set the pulse width in accordance with response time of receiving instruments, [f the
pulse output is not used, puJse width selling is not needed.
DO runction setting
Select DOl as a pulse output contact signal. Refer to 8.2.9, “Digital I/O’' This is not
needed if the pulse output is nut used.
D1 function setting (Note 1.)
Set one of the D1 functions. Refer lo 8,2.9, “Digital I/O”
If the type of the flowmeter w'hich has no optional digital inpuU Type Specification
Code Lh’404***l (Ninth column; 'T ' ), select the D1 function according to the way
described in the (Note 1,)
Indicating Unit Setting
Select an indicating unit for UNITl and/or UNIT 2 among units for totalization
(m^ 1 ,ml ,bhf gal or COUNT). (Note 2)
* In case of tJie converter for special speciUcations (refer to 7.3.3 “Converter for
Special specifications’'), select an indicating unit for UNIT 1 and'^Or UNIT 2 among
units for not only totalization (m^ 1 ,mJ ,bbL gal or COUNT) but also Code of
volumetric.( F, R or B).
Measurement Mode
Set the operation mode of the j:ystem to the measurement mode.Refer to 7,3,1, “Mode
Change.”
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