Oval EL4101 - ② Density Pulse Input Internal Ref. Oscillator Corr. Factor (REF. OSCILLATOR)

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−−−−−＜ＳＥＴ ＭＯＤＥ＞−−−−−−
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−−−−−−−＜ＩＮＰＵＴ＞−−−−−−−
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 ＥＸＩＴ｜ ＣＥＬ｜    ｜ＥＮＴＲ 
E-880TM-3-E
3
② Density pulse input – internal reference oscillator correction factor
(REF. OSCILLATOR)
The correction factor of internal reference oscillator used in (the) period measurement of density pulse
input is set up here.
- How internal reference oscillator (5MHz) is corrected -
While the reference clock in instant flowrate measurement is 5MHz, slight errors exist between flow
computers.
To reduce measurement errors due to these errors to a minimum, a correction factor in the following
formula plays a role of correcting the internal reference oscillator. The correction factor for the
reference oscillator is determined by
K
C
＝K
T
－1＝ －1
Reference clock (5MHz)
Measured frequency (Hz)
Density pulse input submenu screen p. 72
←Numerical value input setup
For details of numerical value input setup, see “(1) Numerical value setup screen
(INPUT) ”on page 43.