I have that 250 ft-lb PI split beam wrench you linked. I am very disappointed with it and with PI in general.
I bought it last year, have put it through less that 50 cycles, none of them over 150ft-lb, and recently sent it to an accredited calibration lab. It tested 12% high at 50 ft-lb, and 4.3% high at 150 ft-lb. After a calibration adjustment, all test values were within +/- 1% of the target value.
I also have a 600 in-lb PI split beam that I bought in 2020. It tested 5.4% high at 120 in-lb and 4.3% high at 360 in-lb. It had less than 50 cycles on it at time of testing. After a calibration adjustment, all test values were within +/- 1.2% of the target value.
PI split beam wrenches are hugely overrated, IMO. You get a wrench that fails to meet its 4% accuracy specification, you get a pseudo calibration certificate with no test data on it, you get a wrench that was very likely not tested after manufacturing, and you get only a 90 day warranty.