@mcmuller: currently the firmware only allows up to 2 decimal points precision for pulse rate. You can actually input 0.37 as the pulse rate, and just remember that the reported volume is 100 times the actual volume.
@pb: same as above: try to multiply pulse rate by 10 or divide by 10 so that it fits in the range.
Another way is to input 1 as the pulse rate, so that the reported volume is actually the number of pulses. You have to further multiply it by the correct pulse rate to get the final number, but hopefully this is not too complicated.