This document defines terms, specifies test methods and provides reporting requirements for marine sensor specifications to ensure a consistent reporting by manufacturers.<\/p>\n
It is applicable to those devices known as conductivity-temperature-depth (CTDs), sound velocity probes, multi-parameter sondes and dissolved gas sensors, that measure parameters such as conductivity, temperature, pressure, sound speed, dissolved oxygen, turbidity, pH, and chlorophyll in seawater.<\/p>\n
It is also generally applicable to all marine environment instruments.<\/p>\n
A \u2018CTD\u2019 directly measures conductivity, temperature, and pressure. Depth is derived from pressure using an equation.<\/p>\n<\/div>\n
The term \u2018sound velocity probe\u2019 is widely used to describe instruments that measure sound speed. In this document the term \u2018 sound velocity\u2019 is used when describing the type of sensor, and the term \u2018sound speed\u2019 is used when describing the parameter or measurand, but these terms can be used interchangeably.<\/p>\n<\/div>\n
| PDF Pages<\/th>\n | PDF Title<\/th>\n<\/tr>\n | ||||||
|---|---|---|---|---|---|---|---|
| 2<\/td>\n | undefined <\/td>\n<\/tr>\n | ||||||
| 7<\/td>\n | Foreword <\/td>\n<\/tr>\n | ||||||
| 8<\/td>\n | Introduction <\/td>\n<\/tr>\n | ||||||
| 9<\/td>\n | 1 Scope 2 Normative references 3 Terms and definitions <\/td>\n<\/tr>\n | ||||||
| 22<\/td>\n | 4 Specifications 4.1 General 4.2 Calibration <\/td>\n<\/tr>\n | ||||||
| 23<\/td>\n | 4.3 Range 4.3.1 Calibrated range 4.3.2 Measuring range 4.3.3 Maximum range 4.4 Accuracy 4.5 Resolution 4.6 Response time 4.7 Depth and pressure 4.7.1 Maximum depth rating 4.7.2 Crush depth rating 4.8 Sample rate 4.9 Mechanical 4.9.1 Wetted materials <\/td>\n<\/tr>\n | ||||||
| 24<\/td>\n | 4.9.2 Exterior dimensions 4.9.3 Mass or weight in air 4.9.4 Weight in freshwater 4.9.5 Weight in seawater 4.9.6 Operating temperature range 4.10 Electrical 4.10.1 Input voltage range <\/td>\n<\/tr>\n | ||||||
| 25<\/td>\n | 4.10.2 Operating power consumption 4.10.3 Startup power consumption 4.11 Interface 4.11.1 Electrical connections 4.11.2 Communications protocol 4.12 Stability <\/td>\n<\/tr>\n | ||||||
| 26<\/td>\n | 4.13 Shelf-life 5 Test methods 5.1 Overview 5.2 General experimental design 5.2.1 General 5.2.2 Sensor settings 5.2.3 Reference 5.2.4 Re-calibration 5.3 Calibration 5.3.1 General <\/td>\n<\/tr>\n | ||||||
| 27<\/td>\n | 5.3.2 Calibration method 5.3.3 Experimental design \u2014 Layout of the calibration 5.3.4 Calibration curve <\/td>\n<\/tr>\n | ||||||
| 28<\/td>\n | 5.3.5 Post-calibration operations 5.4 Accuracy 5.4.1 General 5.4.2 Modifications to ISO 5725 <\/td>\n<\/tr>\n | ||||||
| 29<\/td>\n | 5.4.3 Statistical model 5.4.4 Determination of precision <\/td>\n<\/tr>\n | ||||||
| 30<\/td>\n | 5.4.5 Experimental design \u2014 Layout of the precision experiment <\/td>\n<\/tr>\n | ||||||
| 31<\/td>\n | 5.4.6 Reference 5.4.7 Determination of trueness (bias) 5.4.8 Statistical analysis 5.5 Resolution 5.5.1 General <\/td>\n<\/tr>\n | ||||||
| 32<\/td>\n | 5.5.2 Experimental design 5.5.3 Calculation of \ufffc 5.5.4 Calculation of \ufffc 5.6 Response time 5.6.1 General 5.6.2 Experimental design <\/td>\n<\/tr>\n | ||||||
| 33<\/td>\n | 5.6.3 Response curve <\/td>\n<\/tr>\n | ||||||
| 34<\/td>\n | 5.7 Depth and pressure 5.7.1 Maximum depth rating <\/td>\n<\/tr>\n | ||||||
| 35<\/td>\n | 5.7.2 Crush depth rating 5.7.3 Pressure case void 5.8 Mechanical 5.8.1 Wetted materials 5.8.2 Weight in freshwater <\/td>\n<\/tr>\n | ||||||
| 36<\/td>\n | 5.8.3 Weight in seawater 5.8.4 Operating temperature range 5.9 Electrical 5.9.1 Input voltage range 5.9.2 Operating power consumption <\/td>\n<\/tr>\n | ||||||
| 37<\/td>\n | 5.9.3 Startup power consumption 5.10 Interface 5.10.1 General 5.10.2 Power on\/standby 5.10.3 Galvanic isolation test 5.11 Stability 5.11.1 General 5.11.2 Experimental design <\/td>\n<\/tr>\n | ||||||
| 38<\/td>\n | 5.11.3 Calculation of d <\/td>\n<\/tr>\n | ||||||
| 39<\/td>\n | 5.11.4 Field stability 5.12 Shelf-life 5.12.1 General 5.12.2 Experimental design 5.12.3 Calculation of d 6 Publication 6.1 General <\/td>\n<\/tr>\n | ||||||
| 40<\/td>\n | 6.2 Data sheets 6.2.1 General <\/td>\n<\/tr>\n | ||||||
| 41<\/td>\n | 6.2.2 Test reports 6.3 Calibration certificates <\/td>\n<\/tr>\n | ||||||
| 43<\/td>\n | Annex A (informative) Determination of the accuracy (precision and trueness) \u2014 Example <\/td>\n<\/tr>\n | ||||||
| 47<\/td>\n | Annex B (informative) Determination of the response time \u2014 Examples <\/td>\n<\/tr>\n | ||||||
| 51<\/td>\n | Annex C (informative) Data sheet for a sound velocity sensor \u2014 Example <\/td>\n<\/tr>\n | ||||||
| 52<\/td>\n | Bibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" Marine environment sensor performance. Specifications, testing and reporting. General requirements<\/b><\/p>\n |