E-26-
8205
pH CONTROLLER 8205
4 OPERATION
4.3.8 Alarm Threshold Selection
2 thresholds are set for the relay Alarm: MIN and MAX. Options to invert the relays and
set a delay between 0 and 999 seconds are available. The delay prevents the relay from
too fast activation, e.g. when time for homogenization is required (measurements in tanks
with agitator). If the pH(or T
°
) exceeds a threshold, the controller awaits the delay before
activating the relay. No alarm will be provided, if the measured pH(or T
°
) returns to a
normal value before the delay is elapsed.
Caution! The following condition must be maintained MIN
≤
MAX; and
∆
pH> 0,2
(or
∆
T
°
> 2
°
C) .
OPEN
MANUAL
!
Delay
Delay
Delay
closed
open
ALARM
ENTER
ENTER
0......9
ENTER
ENTER
ENTER
0......9
ENTER
0......9
pH / T
°
min
max
∆
pH > 0,2
∆
T
°
> 2
°
C
MAX
MIN
pH
T
°
(
°
C/
°
F)
0
1
T(s)
INV YES
INV NO
DEL.1
=
030
DEL.1
=
000
MAX
=
06.50
MAX
=
00.00
MIN
=
01.50
MIN
=
00.00
PH ALARM
°
C ALARM
