Owner's manual

36
Adjustment and functions
9.5.4. Setting the flow rate range
associated to the 4-20 mA output
The 4-20 mA output provides an electrical current, the value of
which reflects the flow rate measured by the device.
• The signal may be inverted, i.e. the flow rate value associated to the
20-mA current is lower than the one associated to the 4-mA current.
• The current output gives a 22-mA current when the device shows
an operating error.
4
20
20 180
mA
l/min
Fig. 38: Example of relation between the measuring range and
the current output
ENTER
0......9
*
0......9
*
ENTER
ENTER
MA
0.200
4ma
1.000
20ma
To function "FILT"
* to move the
decimal point,
simultaneously
press keys
0......9
and
→ Enter the flow rate values, in the unit that has been chosen in the
UNIT parameter, related to the 4-20-mA current range.
9.5.5. Choosing the filter of the flow rate
To function "BRGR"
ENTER
0......9
ENTER
FILT
2
FILT
The "Filter" function is used to attenuate the display and 4-20 mA
output, if any, fluctuations when the flow rate varies in the process.
Ten attenuation levels, from 0 (means no attenuation) to 9 (maximum
attenuation of the fluctuations) are available.
Table 4: Response times of the current output and the display
depending on the filter chosen
Filter N° Response time (10% up to 90%)
0 300 ms
1 1,5 s
2 3 s
3 (by default) 5 s
4 7 s
5 11 s
6 20 s
English
Adjustment and functions