Hi,

We use a DT85 logger at various locations on a regular basis for logging temperature in retorts. The logger works fine, except in some location where power surges in the factory occured, we find a spike appears in our logged data.

The logger power supply is protected by a power surge protector. Is is possible that this is coming from the earth connection? Is there some way of stopping these spikes in our data?

Cheers.
Doug.

Good afternoon Doug,

I think you will need more that just a surge protector. You will need a full power supply filter to remove the noise not just spikes.

Cheers,
Roger

Thanks Roger,

We use a Belkin protector : http://onlinestore.winaust.com.au/product/id/22836/n/8-way-surgeprotector-w-tel.html

I feel this should be sufficient to protect the logger from surges/spikes and noise from the power source.

Good afternoon Doug,

Looks like you need more than that device provides. It's not just spikes that will effect the readings. Electric motors on the same power line can put noise on the line, so too can power controllers etc.

Have you tried running the dataTaker on an battery? What type of temperature sensors are you using? Thermocouples can pick up noise from EMF sources as well and will need to be shielded.

Cheers,
Roger