Liquisys M CLM223/253 Operation options
Endress+Hauser 29
6.3 Local operation
6.3.1 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 manually using the REL
key or start the cleaning function.
How to change the operating mode:
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1. The transmitter is in automatic mode. The top LED (green)
next to the AUTO key is lit.
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2. Press the AUTOMATIC key.
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3. To enable the manual mode, enter the code 22 via the PLUS
and MINUS keys and press ENTER to confirm.
The lower LED (manual mode) is lit.
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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).
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5. Switch the relay. The relay is switched on with PLUS and
switched off with MINUS.
The relay remains in this switched state until it is switched
again.
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6. Press the AUTOMATIC key to return to the measuring mode,
i.e. to the automatic mode.
All the relays are triggered again by the transmitter.
• The operating mode remains in effect even after a power failure. The relays assume
the quiescent state, however.
• The manual mode has priority over all other automatic functions.
• Hardware locking is not possible in the manual mode.
• The manual settings are kept until they are actively reset.
• Error code E102 is signaled during manual operation.
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