The technical index of the platinum rhodium thermocouple 1, ( 1) Accidentally silk, the name of the symbol and chemical composition. Name code name polarity chemical composition % perh platinum rhodium - 10 The positive sp9010 platinum platinum rhodium alloy wire 10 platinum anode sn1000 platinum rhodium - 13 Platinum and platinum rhodium wire 13 positive rp8713 platinum anode rn1000 platinum rhodium - 30 Platinum rhodium and platinum rhodium alloy wire 30 the positive bp7030 platinum rhodium alloy wire 6 negative bn946 ( 2) I wire diameter and allowable deviation, index number. Accidentally wire diameter and allow deviation, index comply with the following table: accidentally silk roundness shall not exceed allowable deviation of the diameter: name dividing diameter deviation platinum rhodium 10 - allowed Platinum s0. 5 - 0. Platinum rhodium 13-020 Platinum r0. 5 - 0. Platinum rhodium 30-015 Platinum rhodium 6 b0. 5 - 0. Name of 015 national standard level using temperature range allowable deviation platinum rhodium - 10 Platinum gb/t3772 - 1998Ⅰ0℃~1100℃±1℃Ⅰ1100℃~1600℃±[ 1 + ( t- 1100). * 0. 003] ℃Ⅱ0℃~600℃±1. 5℃Ⅱ600℃~1600℃±0. T platinum rhodium 13-25% Platinum gb/t1598 - 1998Ⅰ0℃~1100℃±1℃Ⅰ1100℃~1600℃±[ 1 + ( t- 1100). * 0. 003] ℃Ⅱ0℃~600℃±1. 5℃Ⅱ600℃~1600℃±0. T platinum rhodium 30-25% Platinum rhodium 6 gb/t2902 - 1998Ⅱ600℃~1700℃±0. 25% tⅢ600℃~ 800℃±4℃Ⅲ800℃~ 1700℃±0。 Note: 5% t measured temperature (t ℃) Technical requirements ( 1) Surface quality: platinum rhodium thermocouple wire surface should be smooth, bright and clean, no oil, no folded, no crack, no burr and interlayer, shall not exceed the diameter tolerance is allowed in the tiny scratches and sag and individual dark spots. ( 2) Platinum wire purity: platinum rhodium - 10 Platinum thermocouple wire in the purity of platinum wire resistance ratio ( r100中/ r0) Said p100 / r0 > = 1. 3918. Among them: r100 and ro for platinum wire respectively at 100 ℃ and 0 ℃ resistance value. Platinum rhodium - 13 Platinum thermocouple wire in the purity of platinum wire with w ( 100℃) Said the standard w ( 100℃) > 1. 3920. Note: w ( 100℃) = r100中/ ro。