User manuals are sorted by product serial number and model codes. The first 4 digits of the serial number represent the manufacture date (YYMM) eg, 2203-XXXX = March 2022 build date.
Models: TPR-145-1-GD/SD, TPR-200-1-GD/SD, TPR-520-1-GD/SD, TPR-750-2-GD/SD
TPR-950-2-GD/SD, TPR-1500-3-GD/SD