KROHNE H250 M8-M9-M10 EN - Manual (Page 54)

6
OPERATION
54
H250
www.krohne.com 04/2011 - 4000269302 MA H250-R02 en
3.14 LFC LFC stands for Low Flow Cutoff.
With variable area flowmeters, the flow range from 0 to 10% is not
defined.
In order to ensure a stable zero point of the analogue output, the
analogue output can be set to a stable value of 4.00mA in a selectable
range from 0 to 20%.
3.14.1 CONTROL INACTIVE LFC is switched off
ACTIVE LFC is switched on
3.14.2 LFC
ON_VALUE
1…19 % Switch-on value 1:
The flow is greater than 20%.
The current output corresponds to this.
If the flow rate falls, then the current output follows it until the ON value.
If the flow value continues to fall, the current output is switched to
4.00 mA 3.
3.14.3 LFC
OFF_VALUE
2…20 % Switch-off value 2:
The flow rate is 0. The current output is 4.00 mA 3.
If the flow rate rises, the current output remains at 4.00 mA 3 until the
OFF value, and is switched to the corresponding flow value if the flow
value rises further.
3.15 INP. CODE YES The input code is used to prevent authorised adjustment of the
measurement parameters.
The input code is not active by default.
If YES is selected, the last code entered must be typed in.
Factory code: → → → ^ ^ ^ ↑ ↑ ↑
If, after confirmation with YES, the button → is also pressed, then a new,
individual, nine-element code can be typed in.
The display shows the required key combination.
NO
3.16 BASIC
SETTING
YES This menu item can be used to select the calibrated basic setting.
This can be helpful if operating data have been changed a number of
times.
This menu item cannot be used to reset the calibration.
NO
Level Designation Selection /
Input Explanation
MA_H250_R02_en_269302_PRT.book Page 54 Tuesday, April 12, 2011 10:17 AM