Description of the relay outputs
38
Alarm (fault message output)
The "Alarm" output is a volt-free change-over relay contact. During
trouble-free operation, the contact between the terminals 15 – 16 is
closed and the one between terminals 14 – 16 is open. In case of a
voltage breakdown, the contact between the terminals 14 – 16 is
closed and the one between terminals 15 – 16 is open.
The instrument is equipped with a range of monitoring functions. You
can define the individual statuses as a fault and program the corre-
sponding message either as a continuous contact (A) or as a
message impulse (M).
Functions/Behaviour of the "Alarm" output:
-
With a continuous contact, the "Alarm" output remains activated
(terminals 14 – 16 closed) as long as the fault persists
.
-
With a message impulse, the output is switched 'on' for 2
seconds and then switched 'off' for 5 seconds.
-
If several faults with differently programmed messages are sig-
nalled simultaneously, the output is switched to continuous con-
tact.
-
The red LED "Alarm" and the text on the display indicate a fault.
-
The fault message signal at the "Alarm" output is deleted by con-
firming the fault via the "Horn" key.
-
The error message can only be deleted if the fault has been
eliminated.
-
Exception: The maintenance date has been exceeded. This mes-
sage is confirmed in the M menu, see below (Maintenance).
-
Each new fault is entered into the error history (also see "i
menu").
-
There is
no
additional alarm via the fault message output when
the limit value is exceeded!
The error messages are described under "Error messages / Trouble-
shooting"
Maintenance (output for maintenance message)
The "Maintenance" output is a volt-free change-over contact. During
trouble-free operation without a programmed maintenance interval,
the contact between the terminals 17 – 19 is closed and the one be-
tween terminals 18 – 19 is open.
The instrument is equipped with a range of monitoring functions and
a programmable maintenance interval. The respective maintenance
message is always a continuous contact.
A maintenance request is displayed via the yellow "Maintenance"
LED. The maintenance display can only be deleted once the status
has been corrected or after the maintenance request has been con-
firmed.
Please refer to the section "Password protection and basic program-
ming" for further programming details.
Alarm
Terminals 14,15,16
The following faults
activate the "Alarm"
output and are
displayed:
Always
fault message
for:
Power failure
Low water level
Function fault optics
Function fault dosing
pump
Function fault drain outlet
Function fault failure 24V
Programmable
fault
messages for:
Low reagent level
Low indicator level
Function fault dosing error
Function fault soiling
Measuring fault turbid
Transmission error
Measuring range ex-
ceeded
Maintenance exceeded
Maintenance
Terminals 17,18,19
Activation
of the
maintenance output
for:
Low indicator level
Function fault dosing
error
Function fault soiling
Maintenance date
reached
