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jimmyB
Newbie
Joined: 30 Sep 2006
Posts: 1
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 Posted: Sun Oct 01, 2006 4:18 pm Post subject: Solar Monitoring |
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Hi
I have a little home project which involves reading temperatures on a (1)solar collector and a (2)water tank. Also I want to record when a pump (3) is off & on. I want to record this data over time & was planning on locating a laptop next to the transducers for the duration of the monitoring. Can you recommend the equipment to purchase, PC interface, etc that would best suit my needs.
Rgds & tx
Jim |
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Michael
Guru
Joined: 07 Jul 2005
Posts: 93
Location: St Neots, Cambridgeshire
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| Posted: Mon Oct 02, 2006 10:13 am Post subject: |
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Hello Jim,
THank you for your post.
For this application, I would recommend the DrDAQ unit. This will allow you toi measure two temperature inputs and switch or power on/off all in one unit.
http://www.drdaq.com
The DrDAQ is connected and powered by the Parallel port, a USB adapter is available.
Best reards,
Michael |
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Guest
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| Posted: Mon Oct 02, 2006 2:31 pm Post subject: Pump Switch? |
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Hi Michael
Tx for your reply - I have checked out the Dr DAQ logger and it looks ideal (for my level of expertise...). I understand how we will use the external temperature sensors but am at a loss re. how to hook up the pump - on/off. The pump is controlled automatically from the solar loop instrumentation (therefore no switch). The voltage input to the DrDAQ is 0 to 5V - any idea how to make the link between the pump and the input?
Use the "electromagnetic kit" placed over the electric supply cable to the pump? - and then using the pH sensor as described on the website
Is it the Reed switch? if this was placed next to the pump would it detect the field change when the motor/pump started?
Rgds & tx
Jim |
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Michael
Guru
Joined: 07 Jul 2005
Posts: 93
Location: St Neots, Cambridgeshire
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| Posted: Wed Oct 04, 2006 8:41 am Post subject: |
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Hello Jim,
You can use a relay to switch a NO or NC contact and use the resistance input to check for pump activation. Similarly you can switch a low voltage supply to indicate pump activation and use the voltage measurement input of the DrDAQ.
Best regards,
michael |
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