Toshiba LF494 - Manual (Page 72)

TOSHIBA
6 F 8 A 0 7 7 4
Counting Rate (pulse rate)
When ;hc tuliilizer is us&d for toial flow measurement, per-couut (pulse) value is the
couiUing rate. Pulse output is also available for external totalization. In this ilcrn, the
counting rate and the pulse width for pulse output can be checked or changed. The
counting rate is set using three digits and exponential quotient.
For example, 0.123 -> 1.23^-1
(3,23>i
10
'' m-)
Proceed as follows to check or change the counting rate.
■ To check the counting rate and pulse width:
Key operation Display example Description
SliT
□
Gl: COUNT RATE
I. 00E-2m’
Press [SET] first to start the items selection sequence
and se 1 ect Cl: COUNT RATE from a mong t he
configuration items using [ ► ] and [
a . ] keys. Then
press iSE’1’1 asain to display the current counting rate.
SET
□ Gl: COUNT RATE Prcsssing [SETj, the system returns to the items
selection sequence.
Counting rate and pulse width can be selecicd by the configuration items as follows:
Counting rate d ^ COUNT RATE
Pulse width G2: PLS. WIDTH
NOTKS
1, The counting rale should be set so that its rale for 100?^ flow rate output is
within the range from to 36U()()(K) p u l s e I f you try to set the counting rale
outside of this range, an error message ^ H. OVER SPEC or i L. OVER SPEC
appears.
Set the counting rate within the specified range,
Example
Case Range :36tl0m’^/h (ImVs)
Counting rate(pulse rate)
Min.: 36OO(m‘Vh)/36UOOOD(pulses/h)=^0, 001 j
Max.: 3fiiH)(m^/h) / 3.6(pulses/h) =1000
-
71
-