26
5.1.4. Output Mode – Analogue
Within the limits of measurement range and the scaling of the output, the analogue output can be freely
configured and scaled. Either a standard output signal (0 - 5 V, 0 - 10 V, 0 - 20 mA, 4 - 20 mA) can be selected
or a user defined range for the current / voltage output (e.g. 1 - 9 V).
NOTE:
In case the analogue output is changed (from current to voltage or vice versa), the Jumper J2 on the board
of the signal conditioning electronics has to be relocated as well (see page 25).
5.1.5. Output Mode – Switch (Relay)
In the field for the “Switch-mode”, one can select “Hysteresis” or “Window”.
The field for “Type” is to determine the switch action of the relay, NO = Normally Open (activate to close), NC
= Normally Close (activate to open).
Under
“Measuring range”
in the field “From” the low value of the measuring range can be entered and in the
field “To” the high value.
The hysteresis of the set point is entered as a percentage of the
measuring range.
[measuring range] = high measuring value – low measuring value
e.g. hysteresis
set point = 500 m
3
/h and reset point is 450 m
3
/h
Hysteresis = 50 m
3
/h = 0.5 % of measuring range
Hysteresis
When the measurement value reaches
set point 1
, the relay will be
activated. The value at the reset point is the value at set point 1 minus
the hysteresis.
e.g. set point 1 = 100 m
3
/h and the hysteresis 5 m
3
/h.
the relay switches at 100 m
3
/h. The reset point is at 96 m
3
/h.
Hysteresis = 5 m
3
/h = 5% of the measuring range
t
m
3
/h
0
1
0
1
NC (activate to open)
NO (activate to close)
set point 1
Hysteresis
