AW Gear Meters EMO-1005 - Manual (Page 20)

AW-Lake Company 8809 Industrial Drive, Franksville, WI 53126  web: www.awgearmeters.com
 Tel: 262-884-9800  Fax: 262-884-9810  Email: [email protected]
REV. 1a 05/98 EMO-1005 Manual.DOC
19
CUTOFF FREQUENCY (Display 7)
CUTOFF FREQ.
CURRENT=XXXXXXXX
The cutoff frequency can be entered in this display. The cutoff frequency is used to remove a slowly
decreasing rate being displayed when the flow is shut off - this is a display function only and pulses are
not being counted. When actual flow stops, however, the unit will momentarily look for the next pulse
and for a very short period, the displayed flow rate will tail away to zero. To avoid this confusing an
operator, if the cutoff frequency is programmed, the display will drop to zero at frequencies below this.
The cutoff frequency is a number between 000 and 255. This number relates to a frequency between
0.00 and 2.55 Hz.
The totalizer is not affected by the Cutoff Frequency. The default value is 00000050
(corresponding to 0.5 Hz).
After having the right number press the ENT key.
ANALOG IN GAIN (Display 8)
ANALOG IN GAIN
CURRENT= XXXXXXXX
The Analog In Gain factor is used at the present time in the PI Mode as a relationship between Analog
Input signal from a PLC or PC, if used, and the set value.
The formula is as follows:
Freq. * 100
Analog In gain =
205
Freq. Is the actual frequency feedback from the flow meter (in Hz) at 20 mA analog input signal from
the PLC. This can be established for most systems by fully opening the fluid regulator and reading the
feedback frequency signal in status display mode.
THE PROGRAMMING IS NOW OVER
WARNING: TO PID USERS: The default value is 00000000, however, if PID user has PLC
analog Input control - ZERO in Analog-In Gain will cause failure. We suggest a value in the
range 20-50. After having the right number, press the ENT key.