I am a student and I am looking for a driver for the Instech Pump P720.

[caribbeanbob]

I am currently working on my undergraduate senior design project and I am looking for a driver(s) for a Instech Peristaltic pump model P720. I need it in order to control the pressure and flow in a perfusion system. Any help will be highly appreciated. If there are no drivers for this pump, where can I get help or how can I produce one.

Thanks

[Dennis_Knutson]

NI does not have a driver and after finding the web site and looking at the product info, it seems the only interface for remote control is an analog voltage input. I did not review the manual to see what the requirements are for this. You might be able to use a DAQ device to provide the voltage. If you use an NI device, there a lot of example programs that help you get started with analog output. Post back when you have chosen your voltage source and need help in programming it.

[caribbeanbob]

Hello Dennis, thanks for your reply. I am using a cDAQ chassis NI 9172 with modules NI 9205 and NI 9263. By using a stereo jack i was able to connect the pump (analog input) to the AOo & com (ground) of the NI 9263 module. I then generated a sinusoidal wave pattern of continuous VDC between 1.5v & -1.5v from labview using the DAQ assistant in the function pallette. The pump cycled rotating clockwise slowing down to zero as the Positive VDC values decreased and then rotating anticlockwise speeding up again as the negative VDC values increased. The NI cDAQ chassis NI 9172 is hooked up to the computer via a USB cable so is there a digital to anolog signal conversion occurring at the NI 9263 module?

I also hooked up a thermister on the NI 9205 module and got some reading but it might need calibrating or the thermistor may not be compartible., i'm not sure if it was an excitable thermistor since it only has two wire contacts. 

For my project, I will be hooking up a flow through low pressure transducer to the NI 9205 module. The transducer will be generating voltage signals that will be converted to digital (I think). We are still waiting for livingsystem to send us the spec on the transducer we have, it has an RJ11 jack with 4 wires. Using labview effeciently and maybe developing  possible program will be the challenge.