KROHNE UFM 530 HT EN - Manual (Page 51)

OPERATION
6
51
UFM 530 HT
www.krohne.com 12/2013 - 4002393201- HB UFM 530 HT R02 en
6.4.2 View error messages / reset error messages (menu 0.00.01 and 0.00.02)
All occurred error messages are stored in an error messages list and can be viewed using
function 0.00.01. The messages are kept in this list until the cause of the error(s) has been
removed and the error messages have been reset using function 0.00.02.
Errors that have been reset, but whose cause has not been removed, are kept in the list but are
displayed without bar. This allows identification of previously acknowledged and
unacknowledged errors.
6.4.3 Full-scale value for 100% volume and flow rate units (menu 3.01.01)
The measuring range depends on the diameter (DN) of the pipe and the volume flow velocity:
6.4.4 Low-flow cut-off, cut-off "on"/"off" value (menu 3.01.05...3.01.07)
Due to the extreme low flow sensitivity of the UFM 3030, it will detect the slightest movement of
fluid, even at zero flow. To avoid these measurements causing outputs and totalizer changes, the
low-flow cut-off can be used to force reading to zero. These are set as a percentage of full scale,
as configured in function 1.01.01 or 3.01.01:
• When the flow rate decreases below the "on" value, the display and outputs are set to their
"zero" values.
• When the flow increases above the "off" value, measurements are resumed.
With function 3.01.05 set to NO, factory settings are used for the "on" and "off" values.
v
min
= 0.5 m/s / 1.64 ft/s v
max
= 20 m/s / 65.62 ft/s
Q
min
(m 3 /h) 0.9 x DN 2 -
Q
max
(m 3 /h)
-
31.25 x DN 2
Q
min
(US.Gal/min) 3.9 x DN 2 -
Q
max
(US.Gal/min) - 138 x DN 2
INFORMATION!
The "off" value must be larger than the "on" value by at least 1%.