Experiments in InfraSonics Notebook
DCAL401DN Electronic Interface:
The DCAL401DN gives a zero pressure differential voltage of about 0.45 Vsupply. The output voltage is ratiometric so a potentiometer is placed across the Vsupply and set to the zero differential output level. The digital voltmeter is connected between the potentiometer slider and the output of the sensor and set to 400mV fullscale.
Protek 506 DOS data acquisition software is run on an old laptop (hard drive not working but booted from floppy) and data is acquired from the Protek 506 via an RS232 interface.