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Schematic representation of logic function
TYPE OF WATER METER
s
st
t
M E
1 LITRE/IMPULSE
2.5 Litres/Impulse
5 Litres/Impulse
10 Litres/Impulse
100 Litres/Impulse
*
500 Litres/Impulse
1000 Litres/Impulse
ALARM/MESSAGE
s
st
t
M E
REAGENT Cl LOW LEVEL
A
Low water pressure
A
Indicator TH low level
A
Ff. optics
A
Ff. dosing pump
A
Ff. outlet to drain
A
Mf. dirtiness
M
power failure 24 V
A
Mf. turbid
M
Transfer error
M
A = Alarm / M = Message / - = no action
Ff. = Function fault
Mf. = Measuring fault
A/M/-
A/M
A/M
A/M
A/M
A/M/-
A/M/-
A/M
A/M/-
Meas. range exceeded
M
A/M/-
Maint. int. exceeded
M
A/M/-
A/M/-
FUNCTION AUX
s
st
t
M E
Contact during analysis
CONTACT BEFORE ANALYSIS *
Contact after analysis
Time:
00m 10s
Logic functions
of the limit value outputs LV1 and LV2
Logic function 0,
Duration
Output relay LV1 or LV2 pulls up when the measured value rises
above limit value LV1 or LV2. If the measured value falls below
the limit value LV1 or LV2 without lock out, the relevant relay
drops out again.
Logic function 1,
Impulse
If the measured value rises above limit value LV1 or LV2, the
relevant output pulls up for a set time t.
Independent of the time taken for the limit value to rise above the
set limit, the relevant output
always
remains in the "ON" position
for the
set
time.
Logic function 2,
Interval
If the measured value rises above one limit value, the relevant output pulls up at intervals with the time set
(Impulse/Pause).
Function IN1
When measurements are carried out by two measurement points, the measuring points switch-over can be suppressed
by activating IN1. If IN1 is active, measurements are only carried out by measuring point 1. A corresponding controller
has to be connected to the IN1 (e.g. timer) (a volt free contact is required!). The energised status of IN1 must be
programmed correspondingly.
Water meter
For quantity dependent analysis triggering it is necessary to connect a water
meter to the
IN2 input
. Program the corresponding water meter rating under
menu item "
WATER METER
".
Alarm / Message
The unit is equipped with an alarm relay output for reporting errors. The events
which could mean a fault at the unit, or are intended to trigger a message, can
either trigger an alarm (continuous contact) or a message (2 second impulse).
For certain unit faults it is already pre-determined whether they trigger an alarm or
a message
The faults are entered into the fault history and stored if the event is programmed
as an alarm or message. For example, if reagent low is not programmed as
ALARM or MESSAGE, then it will not be registered in the fault history. Up to 20
error messages can be stored. This list can be called up via the information menu.
The information stored is the time (day, month, year and hour) and the type of the
fault.
L
After a power failure, the error messages are lost.
Function AUX
The AUX relay output can be programmed for the following control functions:
S
It can be programmed as a functional output for providing a contact of a
programmable duration before and/or during, or after an analysis.
For example, the cooling water flow in an upstream cooler can be controlled by means of a solenoid valve. Cooling
water will then only flow when necessary, i.e. while an analysis is being carried out.
