Howard Coleman Posted January 10 Report Share Posted January 10 really simple stuff here but wrong calculated product. GP Temp 1 (air thermocouple out of turbo) minus GP Temp 3 (air thermocouple into motor) a - b a (320 F) minus b (138.6) produces 100.8 as Math Block Output 1 in Parameters 320 minus 138.6 is actually 181.4 taking 4 more readings i find that the error is always the same % 181.4 is 1.799 X of 100.8. all the other data points are 1.799 for instance a is 219.9 and b is 157.1 difference is 62.8 Math Block shows 34.9 62.8 is 1.799 times 34.9. both GPTemp 1 and GP Temp 3 use the same Linear Calibration Table 2. a = 0 V b = 5 V output units Temperature a = minus 15 F b = 2248 F what is the fix? thanks Quote Link to comment Share on other sites More sharing options...
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