Page 63 - Sterilization Training Manual

September 30, 2015
Application Note: 093015 SEC Signature DIR Accuracy
The SEC Signature DIR EtO channel is specified as follows:
Accuracy = 5% of value Repeatability = 2% of value
Output resolution = 0.3% of full scale
@ 500mg/l EtO...500 +/- (25 + 10 + 3) = 500 +/- 38mg/l
Assuming pure water vapor with optical compensation and pressure compensation disabled. The SEC Signature DIR H2O channel is specified as follows:
Accuracy = 5% of value Repeatability = 2% of value
Output resolution = 0.3% of full scale
@ 75mg/l H2O...75 +/- (3.75 + 1.5 + 0.9) = 75 +/- 7 mg/l
This assumes water vapor mixed with EtO, N2, O2 with optical compensation and pressure compensation enabled. The presence of other gases can cause significant errors in the H2O reading unless optical and pressure compensation are used.
Accuracy = 5% of value
Repeatability = 2% of value
Output resolution = 0.3% of full scale Optical compensation error = 2% of value Pressure compensation error = 2% of value
@ 75mg/l H2O...75 +/- (3.75 + 1.5 + 0.9 + 1.5 + 1.5) = 75 +/- 10 mg/l
Alan H. Petersen Jr.
Sensor Electronics Corporation
Sensor Electronics Corporation
12730 Creek View Avenue  Savage, MN 55378 U.S.A. (800) 285-3651  (952) 938-9486  FAX: (952) 938-9617 www.sensorelectronic.com