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TC08 monitoring on laptop

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TC08 monitoring on laptop

Postby Geoff » Wed Jun 02, 2004 12:49 am

I have a customer with a TC08, when they use it on the desktop PC it logs and updates ok If they warm up channel 1 , channel 1 warms up as it should, When using the laptop if they warm up channel 1 all the channels seem to be affected and change, The installation is the same.
Any suggestions please.
Geoff
 

Postby markspencer » Wed Jun 02, 2004 7:57 am

Hi,

I am sorry to hear that your customer is experiencing problems.

The problem is most likely being caused due to the Laptop using a switch power supply, along with no earth cable in the mains lead. There are two possible solutions:

1. Try to run the laptop of batteries, however, some laptops seem to reduce the amount of voltage levels to the serial port thus stopping the TC-08 working.

2. Use the laptop form the mains, but connect a cable from the 9D connector to a known and tested grounding point, this grounding point should be checked with an earth tester.

Best regards,
Regards,

Mark Spencer
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TC08

Postby Guest » Wed Jun 02, 2004 7:52 pm

That was it, Thanks
Guest
 

TC-08

Postby Dan Acres » Tue Jul 20, 2004 9:53 am

We are experiencing a similar problem, and putting the laptop on batteries seems to work. Unfortunately, the batteries will not last long enough to carry out our tests.

We are using a Rs-232 USB to serial adaptor, as the laptop has no serial port. Will connecting pin 9 on the serial end of the cable accomplish the same as your suggestion above?
Dan Acres
 

Postby markspencer » Thu Jul 22, 2004 7:09 am

Hi,

I am sorry to hear that you are experiencing problems with your TC-08. To solve this you can do the same, attach a cable onto the D9 connector of the TC-08, and then run it to a known and tested grounding point.

You only need attach the cable, you co not need to connect a serial onto the end of the USB to serial port adapter, unless this will assist you in connecting the cable.

Best regards,
Regards,

Mark Spencer
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Postby Dan Acres » Fri Jul 23, 2004 7:37 am

Connecting D9 to earth has solved the problem, many thanks.
Dan Acres
 

ok but how to connect the tc08 to a ground point?

Postby sabrina » Wed Oct 27, 2004 6:21 am

I have a texas instruments extensa 670 cdt and a tc08 datalogger, how to connect the tc08 to a ground point?
Thanks a lot for your answer
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Postby markspencer » Wed Oct 27, 2004 7:17 am

Hi,

To connect the TC-08 to a known and tested earth you will need a earth tester to check the mains earth is good.

Connect a piece of cable to the outer shell of the 9 D connecter, this can be done on the screw terminal part. Then connect the other end to your known and tested ground point.

Best regards,
Regards,

Mark Spencer
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