How does one check whether NI9237 is working fine? All connections are as per half-bridge II configuration with two gages perpendicular to each other and the NI9237 is sitting on a chassis. I am getting positive strain where I expect it to be negative and vice-versa. Moreover, the strain (magnetostrictive strain) is found to be negative irrespective of the polarity of bias magnetic field which I expected to change with the polarity of the bias magnetic field.