30
SE/SG-300 series two-wire compact ultrasonic level transmitters
P28: - - - a
Echo loss indication
a
Echo loss indication
Remark
0
Delayed indication
During echo-loss, display and analogue output will hold last value.
If the echo-loss prevails for 10 sec plus the time period set in
P20
(damping time), the reading on the
display will change to
"
no Echo
"
and the outputs will change according to the
"
Error Indication Mode
"
preset in
P12
Readout
holding value
for "P20" time
t
No Echo
Echo loss LED
goes out
Current output
holding
P12 = 2
holding value
current 22 mA
P12 = 1
current 3,6 mA
P12 = 0
value blinking
for "P20" time
1
No indication
For the time of echo-loss, display and analogue output will hold last value.
2
Advance to full
During echo-loss in case of filling, the reading on the display and analogue output will shift towards the
"
full
"
tank state with a level elevation rate (filling speed) preset in
P26
3
Immediate indication
In case of echo-loss, the display will immediately change to “no Echo”, and the outputs will change
according to the
"
Error Indication Mode
"
preset in
P12
4
Empty tank indication
Echo-loss may occur in completely empty tanks with a spherical bottom due to deflection of the
ultrasonic beam, or in case of silos with an open outlet.
If the echo is lost when the tank is completely empty, the indication will correspond to empty tank, in all
other cases echo-loss indication will function according to the “Delayed”.
FACTORY VALUE: 0
Содержание SE-300 Series
Страница 4: ......
Страница 52: ...sea3802a0600_01 June 2002 Technical specification may be changed without notice ...