How to increase the measuring range?

[JonasYin]

We are using the DasyLab 4.0 system for hemodynamic measurement. Our previous setting has a high limit of 80 mmHg, what can we do to increase the limit up to 200 mmHg?

Thanks so much!

[CJ_Butler__DASYLab_Pro]

Hi... thanks for asking this question here. But, I expect that you'll get a better answer if you can call your DASYLab reseller.

First, DASYLab V4 is very old. We're currently shipping V10. The combination of computer and data acquisition devices have changed a lot over the last ten-plus years, since V4 was shipped. 

Second, to correctly answer your question, you will need to tell us much more. What is your data acquisition device? What analog input ranges are supported? What is your sensor? What voltages or current does it output, and how does that correlate to the mmHg reading? 

Normally, to read mmHg, the analog input reads voltage, and then DASYLab scales the voltage to mmHg, usually using a linear scale (y = mx + b, the standard slope intercept formula) or using two known points ( 0 V = 0 mmHg, 5 V = ?? mmHg). When you configured your device, you defined the input scale to read a range of voltage values. That range is what limits the maximum mmHg reading. 

Without knowing the device, the sensor, and the effective ranges of both, no one can answer your question.

In addition, we would be strongly recommending that you update the software to the current version, since V4 only runs on Windows 95/98, and Windows NT. We typically only can provide active support for the current and previous version, but not for ten year old software.

Good luck,