I hope everyone is doing well.

I have the DT85 series 3 dataTaker and I would like to hook up string pots to it for our testing lab. I have no experience with the data taker and would love any help anyone can provide

I've emailed tech support and they suggested that it might by a voltage divider pot but I'm sure that it reads resistance. I even placed a multi-meter across the green and black leads and was able to get a resistance reading that changed as I pulled the string.

The current way I have it set up is as follows:
Green to *
Red to +
Black to -

When I place the multi-meter across the + and - terminals, to read voltage, as the data taker ticks, the jump on the meter is noticeable but not readable.

The way I have it setup might be correct but my problem is that I can't figure out how to get a live reading on dEX or which measurement setup to choose (Is it 3 wire resistance?)

Tech support mentioned that it could be a 2-wire setup.
It also looks like the data taker is taking samples every 1 second, how can I change that? I know that it can take faster samples because I had it do that (accidentally) once before.

Any help will be much appreciated!

Hi Malsabti,

If the multimeter showed the jump on voltage reading and it was not picked up by the logger then the signal is not synch.
Meaning when dataTaker read the voltage the voltage level is no longer at the peak.
In this instance even you read at full speed, DT may only pick up the signal once a while.

Can you check whether resistance measurement stay when you test the sensor?

Notes:
To enable full speed sampling, please set the schedule reading to continuous.

Best regards,
Rudy Gunawan

Hello Rudy,

I really appreciate your help with this. The resistance does change when I place the multi-meter across the green and black string pot wires. The resistance increases as I pull the string. As for the voltage on the multi-meter, the screen blinks every time the data taker ticks (every one second) but the number remains at zero.

Hi Malsabti,

If the resistance changes, then you can try to read it using R5 configuration.
Remember if the target resistance is greater than 10kohms you need to use R6 configuration.

About reading the voltage, can you send me your program? And which terminal that you connect this sensor?
If a multimeter can read the signal, so does dataTaker.
There might be some glitch in the code.

Best regards,
Rudy Gunawan