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Introduction
How to set up DC Track Circuit Monitoring on SA380TX data logger.
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- Setup analogue input channel: set channel name and input sensor
- Setup data acquisition type
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GUI
Setting up analogue input channel
First of all you have to set an appropriate name and input sensor for the analogue channel.
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Select the appropriate sensor and press the "OK" button to select it for the analogue channel.
If you are happy with the analogue channel settings, press Save: 
The logger will notify you about the configuration changes:
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The actual input value can be read on the graph. (Which is -5A now, since we don't have actual sensor connected to the analogue channel.)
Setting up analogue data acquisition
then enter password and enter: 
The next selector dialog shows which analogue channels are collecting acquire-on-change measurements:
select 701 WI channel:
Brings you to the acquire-on-change configuration dialog:
Most importants settings are the ON/OFF and the "Push to server" toggle buttons.
For a typical configuration, set the acquire-on-change threshold to 1% (lower than the default 5%), then toggle push to server and ON/OFF, then save the changes:
Now the data collection method is set for the particular analogue channel. Let's see the collected data:
Go back to the main dialog by closing all the previous screens with the top-right "X" button.
Navigate to acquire-on-change historical data for analogue channel 701 WI:
| Info |
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| Notice that setting the acquire-on-change configuration will make the logger to acquire a first sample as a base value without any actual input change. |
Web interface
Visiting the web interface we will focus on the Analogue Inputs part of the configuration.
Let's set AN-A02 to a track circuit and enable acquire-on-change on it:
Set name:
Set sensor:
Set acquire-on-change:
Send to logger:
WebCFG tool sends and retrieves the configuration again:
Check the output of the data acquisition:
Gets to: 
Select today's date:
Open acqchg folder:
Open the new file for AB TR we just set up:
The opened file must contain at least one sample as base acquisition.
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