You have PPT which is Parts Per Thousand, not trillion. Multiply your number by 1000 to turn your PPT to PPM (Parts Per Million). So, a reading of 0.95PPT would be the same as 950PPM.

You need to check the manual for your pen to find out what solution it requires to calibrate. It may need EC or PPT, and who knows what concentration. If it doesn't say in the manual, look up the product on the manufacturer's website and it should have it there.
gainesvillegreen Reviewed by gainesvillegreen on . The wrong Hanna Meter Combo I came into possession of a Hanna Meter that measures MS (micro semens) and PPT (not sure now if that is parts per thousands or trillions). 2 Shops have sold me the ppm calibrating fluid 1500. That really messed up the meter and read .95 (conversion is 950 ppt I THINK) They even sold me calibrating fluid for a Milwaukee meter? Im pretty sure now I got my hands on the correct fluid of 1382, bought 5 packs and came home to find they expired 3 years ago. Tried using one and its not Rating: 5