KROHNE CORIMASS G-MFM 4085 EN - Manual (Page 57)

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I. Set the Alarm output, Fct. 3.5.1 to either P1 SAT or ANY OP.SAT. If the pulse output
saturates now the Alarm output will signal a warning.
II. Set the STATUS MSG. function Fct. 1.2.2 to either OUTPUT or ALL MSGS. If the pulse
output becomes saturated now the Status arrow on the display will be lit and the display
will start to flash.
To program the pulse width to 10 ms
Fct. 3.4.(2) PULSE/MASS
↑
Fct. 3.4.(3) PULSE.WIDTH
→
(0)0.4 mSec
↑
(1)0.4 mSec
→ →
10.(4) mSec
6
× ↑
10.0 mSec
↵
Fct. 3.4.(3) PULSE.WIDTH
4
× ↵
Having programmed this, one pulse will be sent from the output for every 20g of process fluid
going through the primary head.
NOTE:
The pulse output ignores the sign, positive or negative of the flow. To ensure reliable operation,
the system should be set for one-way flow with suitable low flow cutoff.
Frequency:
For these values the frequency output sends out a continuous square wave with a frequency
representing the corresponding measured value. As with the current output, the frequency
output is scaled to match the maximum and minimum settings for these values. The range of
the frequency output may also be set by Fct. 1.4.2. or Fct. 3.4.2..
Example 1 :
Measured value
= mass flow
Max flow = 5 kg/min
Min flow = 0
Max frequency = 500 Hz
Flow Frequency
0 kg/min
1 kg/min
5 kg/min
6.5 kg/min
>6.5 kg/min
0 Hz
100 Hz
500 Hz
650 Hz (1.3xMax Flow)
650 Hz