Pulse length 1 and Pulse length 2 menu items
[pulse length]
n
These two menu items appear if in the menu item
‘Relay 1 pH’
[relais 1 pH] the function ‘Pulse length’ [pulse length] has been
selected. You can enter the cycle time and the minimum
switching-on time.
These two menu items and their sub-menu items appear if in the
menu item
‘Relay 1 pH’ [relais 1 pH] the function ‘2-point
controller’ [on/off control 2] has been selected. You can enter the
switching hysteresis here.
You can set the active state and the starting delay (Δt on) and the
release delay (Δt off) with each relay.
The status of the relays is displayed in continuous display 1 with
the corresponding symbols on the continuous display
The setting menu
‘General settings’ [general setting] can be
locked by an access code. The setting menu
‘General settings’
[general setting] permits access to the menu items with the fol‐
lowing information and setting options:
Identity code menu item
[access c]
n
The identity code
[access code] and the program version
[software version] are displayed.
Menu item: Dosing delay
[dosing delay]
n
You can enter the metering delay here (1 min [off] ... 30 min).
After connecting to the mains power supply and calibration,
metering and troubleshooting is activated with a delay (=
metering delay
[dosing delay]). Press [Start/Stop] to end the
delay.
Dosing control
[dosing control]
n
Under Dosing control
[dosing control] you can enter the
metering control time (1 min [off] ... 120 min). Metering and
control stops if the measured value has not reached the set‐
point after this metering control time. Press
[Start/Stop] to
restart metering and control. If the setpoint is reached for
longer than 1 minute, then metering and control is started auto‐
matically.
Inputs, function ‘active open’
We recommend operating the inputs Sample water
and Pause as ‘active open’ for safety reasons. A
malfunction of the external signal encoder, such as
cable break etc., then produces an alarm mes‐
sage.
The processes Sample water
[sample water] and Pause [pause]
are triggered by external digital potential-free signals.
If one of the inputs is active, the control is stopped and no further
errors are emitted.
Menu items: 2-point controller-1
[on/off control 1] and 2-point con‐
troller-2
[on/off control 2]
Sub-menu points for 2-point con‐
troller1
[on/off control 1] and 2-point
controller 2
[on/off control 2]
Setting menu: General settings
[general setting]
Sample water
[sample water] and
Pause
[pause]
Operating and replacing the storage tank
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