KROHNE MFC 400 EN - Manual (Page 76)

6
OPERATION
76
MFC 400
www.krohne.com 08/2013 - 4002075802 - MA MFC 400 R02 en
C3._ Frequency Output X
C3._ Frequency Output X X stands for one of the connection terminals A, B or D
_ stands for Fct. C3.2 (A) / C3.3 (B) / C3.5 (D)
C3._.1 Pulse Shape Specify the pulse shape
Select:
Symmetric (about 50% on and 50% off) /
Automatic (constant pulse with about 50% on and 50% off at 100% pulse
rate) /
Fixed (fixed pulse rate, setting see below Fct. C3._.3 100% pulse rate)
C3._.2 Pulse Width Only available if set to "Fixed" in Fct. C3._.1.
Range: 0.05…2000 ms
Note: max. setting value Tp [ms] ≤ 500 / max. pulse rate [1/s], gives the pulse
width = time where the output is activated
C3._.3 100% Pulse Rate Pulse rate for 100% of the measuring range
Range: 1…10000 Hz
Limitation 100% pulse rate ≤ 100/s: I
max
≤ 100 mA
Limitation 100% pulse rate > 100/s: I
max
≤ 20 mA
C3._.4 Measurement Measurements for activating the output
Select:
Volume Flow / Mass Flow / Temperature / Density / Velocity / Sensor
Average / Sensor Deviation / Drive Level / Tube Frequency / Strain 1 /
Strain 2 / 2 Phase Signal
Depending on the settings for the concentration measurement, the following
measurements are possible:
Concentration 1 / Concentration 2 / Conc. mass flow 1 / Conc. mass flow 2 /
Conc. volume flow 1 / Conc. volume flow 2
C3._.5 Range 0…100% of the measurement set in Fct. C3._.4
x.xx…xx.xx _ _ _ (format and unit depend on the "measurement", see above)
C3._.6 Polarity Set polarity; the flow direction in C1.3.2 must be noted!
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 (always displays positive, with both negative and positive
values)
C3._.7 Limitation Limitation before applying the time constant
± xxx … ±xxx%; range: -150…+150%
C3._.8 Low Flow Cutoff Sets the measurement to "0" for low values
x.xxx ± x.xxx%; range: 0.0…20%
(1st value = switching point / 2nd value = hysteresis),
condition: 2nd value ≤ 1st value
C3._.9 Time Constant Range: 000.1…100 s
C3._.10 Invert Signal Select:
Off (activated output: switch closed) /
On (activated output: switch open)
C3._.11 Phase Shift w.r.t. B Only available when configuring the terminal A or D and only if output B is a
pulse or frequency output. If setting in Fct. C2.5.6 is "Both Polarities", the
phase shift is prefixed by a symbol, e.g. -90° and +90°
Select:
Off (no phase shift) /
0° Phase Shift (between outputs A or D and B, inversion possible) /
90° Phase Shift (between outputs A or D and B, inversion possible) /
180° Phase Shift (between outputs A or D and B, inversion possible)
.book Page 76 Monday, August 26, 2013 9:05 AM