Operation
VA 521 EN V1.20
Page
32
o
39
Settings
4-20mA
Channel 1
AutoRange
Settings
4-20mA
Error Current
End Range 169,8m/s 1098,9 m³/h
1098,9 m³/h
The scaling of the 4-20mA channel can be done
automatically "Auto Range = on" or manual "AutoRange
= off" .
With button
„
“
select the menu item „AutoRange“
select with
„OK“
the desired scaling method.
(Automatically or manually)
In case of
AutoRange = off
with
„Scale 4mA“
und
„Scale 20mA“
the scale ranges needs to be defined.
Select with button
„
“
the item „Scale 4mA“ or „Scale
20mA“ and confirm with
„OK“
.
Input of the scaling values will be analogous as
described before for value settings.
Using
„CLR“
clears up the complete settings at once.
For
„Auto on“
, the max. scaling is calculated based on
the inner tube diameter, max. measurement range and
the reference conditions settings.
Takeover of the inputs with
„Save
“ and leaving the
menu with
„Back
“.
This determines the output in case of an error at the
analog output.
2 mA Sensor error / System error
22 mA Sensor error / System error
None Output according Namur (
3.8mA
– 20.5 mA)
< 4mA to 3.8 mA Measuring range under range
>20mA to 20.5 mA Measuring range exceeding
To make changes first select a menu item "Current Error"
with button
„
“
and then select by pressing the
„OK“
the desired mode
For saving the changes done press button
„Save“
to
discard the changes press button
“Cancel”.
Leaving the menu with
„Back
“.
