Instruction Manual FireGuard 2
Settings
54
13542E/5
8.2.6
Calculating the gradient
A constant mean value (Mw 1/2) is calculated from two consecutive five-second intervals
(first block with 10 measuring values, second block with 10 measuring values).
The difference between both mean values forms the gradient, which is then scaled to one
minute. The gradient of the turbidity value and temperature is calculated.
Figure
30
: Calculating the gradient
The turbidity gradient is determined from the integrated measuring value. Changing the
integration time thus also has an effect on the turbidity gradient.
8.2.7
Reading if limit exceeded or undershot
If a limit event occurs during operation, it has the
following effects on measuring mode:
▪
Threshold value display indicates an unusual
state.
▪
If an output for the corresponding limit channel
is programmed, it is switched.
If the message
Limit
appears, the color of the sta-
tus display changes to
white
and the numbers of
the limit channels are listed with their channel num-
bers in
red
if limits have been exceeded or under-
shot.
Inactive limits are indicated with
"
_
".
