YSI 52 User Manual
Page 33
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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
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