July 2022
© RLS Wacon analytics GmbH +49 (0)5121 281260
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36
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Connection of external components
Connection of a control for reagent level warning
Relay 2 or relay 4 can be used to switch a low reagent level message (reagent level <10%) to a
controller or other signal transmitter. For this purpose, relay 2 or relay 4 must be programmed to
the reagent low operating mode.
Programming: Menu > Settings > Outputs > Relay 2 > Reagent
Programming: Menu > Settings > Outputs > Relay 4 > Reagent
Relay function analysis active
Relay 4 can be used to signal that an analysis has been started.
Signalling devices, pumps or valves can be connected. Connection to a control room is also possible.
There is a choice between:
Relay 4 is active during the analysis:
Programming: Menu > Settings > Outputs > Relay 4 > Analysis
In this mode, a feed pump can be connected to the relay, for example, to feed
pressure-free sample water into the measuring chamber.
Relay 4 is active before and during analysis:
Programming: Menu > Settings > Outputs > Relay 4 > Analysis > Analysis delay
If selected before and during analysis, the analysis delay is entered in the next step. This time is
waited until the unit's solenoid valve opens. This enables functions such as switching cold water on
sample coolers.
When using the analysis function to switch cold water on a sample cooler, a
manual override of the cold water valve must be provided to prevent hazards
to people and material during maintenance or test operation. Design,
integration into the safety chain and installation must be carried out in
compliance with the applicable standards and laws. Talk to the manufacturer
of your steam boiler.
