Liquisys M CPM223/253 Operability
Endress+Hauser 33
5.3 Local Operation
5.3.1 Automatic/manual mode
The transmitter normally operates in automatic mode. Here, the relays are triggered by the
transmitter. In the manual mode, you can trigger the relays using the REL key or start the
cleaning function.
How to change the operating mode:
Pay attention to the following:
• The selected operating mode remains in effect even after a power failure.
• The manual mode has priority over all automatic functions (Hold).
• Hardware locking is not possible in the manual mode.
• The manual settings are kept until they are actively reset.
• Error code E102 is signalled in the manual mode.
1. The transmitter is in Automatic mode. The top LED beside the
AUTO key is lit.
2. Press the AUTO key.
3. To enable the manual mode, enter the code 22 via the PLUS and
MINUS keys. The bottom LED beside the AUTO key lights up.
4. Select the relay or the function.
You can use the REL key to switch between the relays. The relay
selected and the switch status (ON/OFF) is displayed on the
second line of the display.
In the manual mode, the measured value is displayed continuously
(e.g. for measured value monitoring for dosing functions).
5. Switch the relay. It is switched on with PLUS and switched off with
MINUS.
The relay remains in its switched state until it is switched over
again.
6. Press the AUTO key to return to the measuring mode, i.e. to the
automatic mode. All the relays are triggered again by the
transmitter.
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