E126-P-EG
User Manual
FW_E126-P-EG_M_v0301-01_EN
Page 31
8
ANALOG OUTPUT
8.2 RATE MIN (4MA)
Enter the flowrate at which the output should generate the minimum signal
(4 mA) – in most applications at flowrate “0”.
The number of decimals displayed depends on the settings in
2.3: FLOWRATE > DECIMALS
.
The measuring units and the time (L/min for example) depend on the
settings in
2.1: FLOWRATE > UNIT
and
2.2: FLOWRATE > TIME
and are displayed
during editing.
If required, you can program the analog output 'up-side-down'. The 4 mA
then represents the maximum flowrate.
For example, enter 800 L/min.
8.3 RATE MAX (20MA)
Enter the flowrate at which the output should generate the maximum signal
(20 mA) – in most applications at maximum flow.
The number of decimals displayed depends on the settings in
2.3: FLOWRATE > DECIMALS
.
The measuring units and the time (L/min for example) depend on the
settings in
2.1: FLOWRATE > UNIT
and
2.2: FLOWRATE > TIME
and are displayed
during editing.
If required, you can program the analog output 'up-side-down'. The 20 mA
then represents the minimum flowrate.
For example, enter 0 L/min.
8.4 CUT-OFF
A low flow cut-off can be set as a percentage of the full range of 16 mA, for
example, to ignore leakage.
When the flow is less than the required rate, the current will be the
minimum signal (4 mA, or 20mA when the analog output is programmed
‘up-side-down’).
CUT-OFF CALCULATION EXAMPLES
Cut-off
Rate-min
4 mA
Rate-max
20 mA
Required rate
before reading
Output
at required rate
2.0%
0 L/min
100 L/min (100-0)*2.0% + 0 = 2.0 L/min
4 + (16*2.0%) = 4.32 mA
3.5%
20 L/min
800 L/min (800-20)*3.5% + 20 = 27.3 L/min 4 + (16*3.5%) = 4.56 mA
3.5% up-side-down
800 L/min 20 L/min
(800-20)*3.5% + 20 = 27.3 L/min 20 - (16*3.5%) = 19.44 mA
8.5 TUNE MIN (4MA)
Use this setting to precisely tune the minimum analog output value (initial
value is 4 mA). This value can differ slightly due to ambient influences such
as temperature.
Before tuning the signal, make sure the analog signal is not being
used for any application.
After pressing PROG, the current will be about 4 mA. The current can be
increased / decreased with the arrow-keys and is directly active. Press
PROG to store the new value.
8.6 TUNE MAX (20MA)
Use this setting to precisely tune the maximum analog output value (initial
value is 20 mA). This value can differ slightly due to ambient influences
such as temperature.
Before tuning the signal, make sure the analog signal is not being
used for any application.
After pressing PROG, the current will be about 20 mA. The current can be
increased / decreased with the arrow-keys and is directly active. Press
PROG to store the new value.
