Technical data

24 / 44  BKI 03 ATEX 027X  spa3804a0600p_06
P28 - - - a Echo loss indication FACTORY DEFAULT: 0
a Echo loss indication Remark
0 Delayed indication
During short echo-loss (for the period of twice the time set in P20) analogue output will hold last
value. After this period the current value according to the setting in P12 and via
HART ERROR CODE 2 will be transmitted.
1 No indication For the time of echo-loss, analogue output will hold last value.
2 Filling simulation
Loosing echo during the filling process, transmitted value will increase according to the filling
speed set in P26
3
Immediate indication
Loosing echo the current value (according to the setting in P12) and the ERROR CODE 2
(via HART) will immediately be transmitted.
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. In such cases it may be useful to
indicate empty tank instead of echo loss.
HART
Current output
Holding value
Holding value
Error Code 2
Current 22mA P12=2
Holding last value P12=0
Current 3,8mA P12=1
Echo loss
Echo LED goes out
2 * ”P20” time