KROHNE UFM 500 EN - Manual (Page 30)

30
Frequency output for flowrate Q = 100% (full-scale range) for F/R operation and setting in PULSE/UNIT (fct. 3.4.2 +
3.4.3).
T h e freq u en cy at th e ou tpu t alw ays refers to th e settin g of th e forw ard ran ge F
100%
(in case of forw ard flow ) or to th e reverse ran ge
R
100%
(in case of reverse flow ).
5 .9 S tatus outp ut S
5 .9 .1 A p p lication S (fct. 3 .5 .1 )
A p p lication S S etting via fct. 3 .5 .1
F atal error F A T A L E R R .
U ltrason ic error U S E R R O R
F orw ard /R everse in d ication F /R IN D .
T rip poin t T R IP P O IN T
(N ote: w h en th e in d ication ou tpu t con tact is closed , th e open collector ou tpu t is active.)
F or con n ection d iagram s of th e statu s ou tpu t, see sect. 2 .3 .5 .
F atal error
- D ata error in E E P R O M 1 (param eters).
- C alibration d ata lost. (E E P R O M 2 ).
- C u rren t calibration valu es.
- T otalizer cou n ts lost or totalizer overflow .
- R A M error.
- R O M error.
- F overran ge (1 2 5 % ).
- I overran ge (1 2 5 % ).
- E m pty pipe.
C on tact w ill be open w ith F atal error an d closed w h en n o error occu rs.
U S error
O n e or both u ltrason ic path s fail. C on tact w ill be open in case of path failu re an d closed w h en n o path
failu re.
F /R ind . F low d irection in d ication poin t 1 is u sed as h ysteresis in percen tage of th e forw ard fu ll-scale. C on tact w ill
be open d u rin g forw ard flow an d closed d u rin g reverse flow .
T rip p oint P ossibility for open in g or closin g statu s ou tpu t con tact, w h en flow ex ceed s a pre-d efin ed poin t.
If (p oint 1 > p oint 2 ) T h e con tact w ill close if flow rate rises above poin t 1 an d it w ill open if flow rate d rops below poin t 2 .
If (p oint 2 > p oint 1 ) T h e con tact w ill open if flow rate rises above poin t 2 an d it w ill close if flow rate d rops below poin t 1.
5.10 Low-flow cutoff (SMU) for I + F
•
T o avoid erron eou s m easu rem en ts at low flow rates, th e
S M U sw itch es th e cu rren t an d freq u en cy ou tpu ts (I+ F ) off.
I goes to 0 /4 m A (fct. 3 .3 .2 ) or to I
0%
(fct. 3 .3 .3 ) an d F to 0
H z.
•
If “ N O ” is set u n d er fu n ction s 3 .3 .7 + 3 .4 .6 , fixed cu toff
“ on ” an d cu toff “ off” valu es of 0 .1 an d 0 .2 5 % , resp., of
Q
100%
(fu ll-scale ran ge, see fct. 3 .1 .1 ) act on th e ou tpu ts I +
F .
•
If “ YE S ” is set u n d er fu n ction s 3 .3 .7 + 3 .4 .6 , th e cu toff
“ on ” an d cu toff “ off” valu es for I + F are separately
ad ju stable in th e ran ges specified below .
F ct. 3 .3 .7 L ow -flow cutoff (S M U ) for I d esired ?
S et N O or YE S .
F ct. 3 .3 .8 C utoff “ on” value for S M U -I
(appears on ly if “ YE S ” set in fct. 3 .3 .7 ).
R an ge: 0 1 to 1 9 P E R C E N T of Q
100%
.
T h e low -flow cu toff d rives th e cu rren t ou tpu t to 0 /4 m A (fct.
3 .3 .2 ) or to I
0%
(fct. 3 .3 .3 ) w h en th e flow d ecreases to th e
cu toff “ on ” valu e.
F
F
max
(125%)
F
100%
V
max
Max 0
Sound velocity measurement
V
min
V
sound
(m/s)
F5
100 Max % % 0 100 Max
Contact open
Switched off
F
F4
Q
forwar
Q
reverse