KROHNE OPTISONIC 7300 EN - Manual (Page 73)

OPERATION
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73
OPTISONIC 7300
www.krohne.com 09/2012 - 4001102303 - MA OPTISONIC 7300 R03 en
frequency output X
C2. frequency output X X stands for one of the connection terminals A, B or D.
stands for A, B or D.
C2. .1 pulse shape Specify the pulse shape.
Select:
Symmetric (about 50% on and 50% off).
Automatic (constant pulse width, at 100% pulse rate about 50% on and
50% off)
Fixed (fixed pulse rate, setting see Fct. C2. .3 100% pulse rate)
C2. .2 pulse width Only available if Fct. C2. .1 is set to "Fixed".
Range: 0.05…2000 ms
Note: max. setting value T
p
[ms] ≤ 500 / max. pulse rate [1/s], gives the
pulse width = time where the output is activated.
C2. .3 100 % pulse rate Pulse rate for 100% of the measuring range.
Range: 0.0…10000 Hz
Limitation 100% pulse rate ≤ 100/s: I
max
≤ 100 mA
Limitation 100% pulse rate > 100/s: I
max
≤ 20 mA
C2. .4 measurement Measurements for activating the output.
Select: volume flow / corr. volume flow / mass flow / molar mass / flow
speed / velocity of sound / gain / diagnostics 1, 2, 3
C2. .5 range 0…100% of the measurement set in Fct. C2. .4
0…xx.xx _ _ _ (format and unit depend on the measurement, see
above)
C2. .6 polarity Set polarity of frequency output, please note flow direction in C1.3.2!
Select: both polarities (plus and minus values are displayed) / positive
polarity (display for negative values = 0) / negative polarity (display for
positive values = 0) / absolute value (use for the output)
C2. .7 limitation Set lower and upper limit for frequency output before applying the time
constant.
± xxx … ±xxx%
Range: -150…+150%
C2. .8 low flow cutoff Below set value, frequency output is set to zero.
x.xxx ± x.xxx%
Range: 0.0…20%
1 st value = switching point / 2 nd value = hysteresis
Condition: 2 nd value ≤ 1 st value
C2. .9 time constant Averages measurement
Increasing value improves stability but delays the reaction.
Range: 000.1…100 s
C2. .10 invert signal Define frequency output activation.
Off (switch closed)
On (switch open)