Analogue / Digital Logger II
Posted on Mar 13, 2013 5790
Under: Delay Circuits
This is a circuit monitoring device. It runs for over 10 days and can log up to 32k events both digital and analog. Samples are logged either on a timing basis (.01 to 2.5 seconds), or on a triggered basis. Four inputs are provided, up to three of which can be analog. All setup and configuration is done via a terminal program. Once configured, the device can run stand-alone monitoring a circuit. The device can then be connected back to a terminal program for data retrieval.
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Any terminal program can be used to communicate with this device. Plug a standard DB-9 cable into the onboard connector and 8-24 volts into the power connector. Set the baud rate for 19200, full duplex, no parity, one stop bit and no hardware or software handshaking. (Note: only lines 2,3 and 5 are used for this function.) The same DB-9 connector is used in the stand-alone mode. Simply make up a cable using a DB-9 male connector and any type of clips, connectors, or leads that you need. (Click on image above to see an example). In this mode, the connections are as follows: pin-5 Ground pin-7 8 to 24 Volts pin-1 Input #1 pin-6 Input #2 pin-9 Input #3 pin-8 Input #4 (You will probably want to configure the unit for your specific use: see instructions below) When power is applied to the unit with no computer connected, the LED flashes rapidly. This is the standby mode. Holding down the button for over 2 seconds causes the LED to go out. The unit is now armed and will react to changes in any of the 4 input lines (in the trigger mode), or just start storing (in the timing mode). After that, any event will cause a brief flash. The data will be stored until one of the following occurs: 1. The 250 hour time limit is reached. 2. The 32k maximum events are stored. 3. The unit is powered off. Once the data is captured, just disconnect it from the circuit you are testing. Then connect the unit to your computer...