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ADC-212/100 Reading Problem

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ADC-212/100 Reading Problem

Postby Guest » Thu Aug 26, 2004 3:51 pm

Hi,

Our ADC-212/100 started to give out funny reading yesterday after our experiment. We tested the device by sending in a RF signal at 100k Amp of 1 V. Both our own program and the Picoscope software shows the same voltage of 10 mV. Our concern is that we might have overload the device during the experiment. What could the problem be? Is their anyway that we can fix it? If not, how can we get the service?

Thank you
Guest
 

Postby Sarah » Fri Aug 27, 2004 11:34 am

Hi

Thank you for your post, I am sorry to hear that you have been experiencing problems.

Do you mean that you put a 100kA signal into the unit? Or did you mean 100kHz with 1A (rather than 1V)?

What size voltage did you put into the unit during the experiment? How far over the 20V maximum input was it?

If the unit does need repairing then we will be able to do that for you. First we need to establish whether it needs repairing or not.

Best Regards
Sarah
 

Postby Guest » Fri Aug 27, 2004 3:12 pm

Hi Sarah,
Sorry for the confusion. When we tested it after the experiment, we used a 100kHz Signal with an amplitude of 1 V. We do not really know the size of voltage that during the experiment. However, we do know that the total RF power was around 20 W and the system was running at low current (in the 50-250 mA range). From the information, we think that the voltage input should exceed 20V maximum input in a significant amount.
Regard
Guest
 

Postby Guest » Fri Aug 27, 2004 4:30 pm

This is the results from older experiment under the same condition:

Frequency: 13.56 MHz
RF Power: 20 W
Channel A input - Voltage: 51 V (PicoScope read 510 mV)
Channel B input - Current: ~1 A (PicoScope read ~1 V)

*Channel A 100:1 Voltage Divider
*Channel B 1V:1A converter


In this experiment, however, we didn't use a 100:1 voltage divider. From this old result we concluded that the voltage input to Channel A was about 50V.
Guest
 

Postby Sarah » Tue Aug 31, 2004 2:12 pm

Hi

Thank you for your post and the extra information.

It does sound like you have exceeded the maximum voltage input and this has probably damaged the unit. If you wish to return the unit to us then there will be a charge of £50 plus tax and delivery for the repair. If the unit is beyond economical repair then we will contact you to discuss further options.

In order to return the unit to us you will first need a returns number. Please do not send us the unit without first obtaining this number. To obtain a returns number please email us the following information:

Name
Full address
Email address
Telephone number
Unit being returned
A brief summary of the problem

Please email this information to tech@picotech.com

Best Regards
Sarah
 


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