... manufacturePt100, Pt500, Pt1000, - IEC 751: Class C, B, A, 1/3B, 1/5B and 1/10B Connection wire (PtNi, Ni, Ag ... - Class A 3850 ppm/C +/-4 ppm/C - Class 1/3B 3850 ppm/C +/-5 ppm/C - Class 1/5B 3850 ... +600C - Class A tolerance from -50C to +400C - Class 1/3B tolerance from -50C to +400C - Class 1/5B tolerance from ...