Deif Multi-line 2 Designers Reference Handbook page 96

AGC
Principle
The illustration below shows that when the wire of the input breaks, the measured value will drop
to zero. Then the alarm will occur.
Input signal
(mA, °C, b, %)
Upper failure
limit
Lower failure
limit
PT100 settings
The alarm setpoint of the PT100 inputs can be calculated in percent like this:
= t +
deviation ( 40 )
%
Example:
Required setpoint is 200 °C. The adjustment must be:
VDO settings
The alarm setpoint of the VDO inputs can be calculated in percent like this:
VDO 104, oil pressure:
VDO 105, cooling temp.:
VDO 106, fuel level:
The deviation is the alarm value entered in percent, and the setting is the required alarm setting
in ohms.
Example:
Required setpoint of VDO104 is 180 Ω . The adjustment must be:
DEIF A/S
2 / 9 ,
=
deviation (
%
=
deviation 83
%
deviation =
setting
%
deviation =
setting
%
deviation =
setting
%
=
deviation 180
%
=
deviation 75
%
Wire failure
Wire failure
Wire break
+
200 40 ) 2 / 9 ,
%
/ 240 * 100
/ 530 * 100
/ 240 * 100
/ 240 * 100
%
Designer's Reference Handbook
t
Page 96 of 168