PMA Digital 280 Mode D'emploi page 11

MEASURING RANGE -3...22mA FOR CURRENT RANGE 0/4...20mA
A decrease of a 4... 20mA standard current below 2 mA can be signalled by display of
"FbF". This can be configured by selecting 0/2/3/5in the last digit (measured value
alarm) of Con1 / Con3. This means that only 1 or 4 (measured value alarm) may be
selected in the last digit of Con1/Con3 for the 0 ... 20 mA range.
Example for input range: 0...20 mA : Con1 : 0611
HINTS ON THE PARAMETER LEVEL
Filter time constant t_F
Adjust the filter time constant to a value which suppresses signal variations to an
acceptable level. Signal changes above the adjusted bandwidth will be passed through
to the output.
Filter bandwidth b_F
The input signal varies 1,5%, for example. The filter bandwidth must be adjusted
accordingly, i.e. enter 1.5.
CONNECTING EXAMPLES
Connecting example for indicator with two-wire transmitter supply.
9499-040-47801
t_F t_F t_F
b_F b_F b_F
Filter bandwidth
/ Con3: 3001
Configuration
Con1: x61x ; Con2: xx0x; Con3: xxxx
9