When the pr-33-8 is connected to a raspberry pi via i2c and used with node-red, I am getting raw values of 91 for channel 1 and 6 for channel 2. Is it normal for those numbers to be that far off?
Are you using the NCD ADS 1115 node? Have you set the multiplier to .000628? What gain are you using?
With a multiplier of .000628 and a gain of 2 I usually get the normal 4-20ma I am looking for.