User Manual Q&AAnswer
Mar 04, 2025 - 08:27 PM
To reset the alarm on the INFICON LDM250/LDM450/LDM650 Low Voltage unit, you have two options: Auto Reset and Manual Reset.
1. Auto Reset: By default, the unit is set to Auto Reset. This means that the alarm will automatically reset once the gas concentration falls below the alarm threshold. To enable Auto Reset, ensure that DIP switch (5) no3 on each channel's control card is set to "ON".
2. Manual Reset: If you prefer to manually reset the alarm, you can enable Manual Reset. To do this, set DIP switch (5) no3 on each channel's control card to "OFF". Then, when an alarm occurs, you can press the "Reset/Test/Service" button (7) on the cover of the unit to manually reset the alarm for that channel.
Please note that the alarm time delay (T1) can also be adjusted for each channel using DIP switch (5). The available options for the alarm time delay are no delay, 1 minute delay, 10 minutes delay, and 30 minutes delay.
For further assistance or specific guidance on your application, it is recommended to contact INFICON directly.
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