YSI 52 - Manual (Page 33)

Discussion of Measurement Errors Section 9
Calculation
TYPE DESCRIPTION CALCULATION ERROR(mg/L)
1a instrument accuracy ±0.001 x 8.24 + 0.01 ±0.02
2a probe background ±0.01 x (1-8.24/9.07) x 7.26 ±0.01
2b probe nonlinearity ±0.003 x 7.26 ±0.02
2c temp. compensation ±(24-20) x 0.002 x 7.26 ±0.06
3a temp. uncertainty ±0.01 x 7.26 ±0.07
3b pressure ±0.017 x 7.26 ±0.12
3c altitude ±0.018 x 7.26 ±0.13
Probable error can be determined by an r.m.s. calculation:
r.m.s. error = [.022 + .012 + .022 + .062 + .122 + .132 ]1/2 = ±0.19 mg/L
YSI, Incorporated Model 52 29