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14 GMS810-/GMS811-FIDOR · Operating Instructions · 8013911 V1-0 · © SICK AG
Product Description
Subject to change without notice
2.2.3 Measuring principle
Fig. 2 Measuring principle
● The FIDOR uses a flame ionization detector (FID) for measuring the hydrocarbons.
● A hydrogen flame supplied by fuel gas and combustion air burns in the FID. The sample
gas is routed into this flame.
● The hydrocarbons contained in the sample gas are split; the produced hydrocarbon
fragments are ionized. A stream of ions forms in the electric field and this electrical
stream is measured.
● The measuring signal is proportional to the number of the listed, non-oxidized hydrocar-
bon atoms. Hydrocarbon atoms which are already oxidized are only partially detected.
CO and CO
2
are ineffective.
● The quantitative correlation between the measurement signal and the hydrocarbon
concentration in the sample gas is determined by performing reference measurements
with test gases which do not contain any hydrocarbons (zero gas) or of which the hydro-
carbon concentration is known exactly (reference gas – e.g. 80 ppm propane in air).
● Only a small portion of the sample gas is burnt for analysis, the major portion is diluted
with instrument air and combustion air and routed outside via the exhaust gas line.
Combustion air
(Instrument air)
Sample gas
Fuel gas
- GMS810-/GMS811-FIDOR 1
- Document Information 2
- Warning Symbols 2
- Warning Levels 2
- Information Symbols 3
- Contents 4
- 1 Important Information 7
- Main hazards 8
- Intended use 8
- Responsibility of user 9
- Important Information 10
- 2 Product Description 11
- Product identification 12
- Characteristics of FIDOR 12
- Method of operation 13
- Functional units 13
- Measuring principle 14
- Remote control 15
- Interfaces 15
- SOPAS ET (PC program) 16
- Gas flow plan 17
- Instrument air 18
- Combustion air 18
- Fuel gas 18
- Test gas 18
- Sample gas 19
- Product Description 20
- 3 Installation and Connection 21
- Scope of delivery 22
- Installing 22
- Connecting the instrument air 24
- Connecting the combustion air 24
- Connecting the test gases 24
- Connecting the sample gas 25
- Connecting the gas outlet 25
- Electrical installation 26
- Signal connections 27
- Installation and Connection 28
- Ethernet interface 29
- Connecting the power supply 29
- 4 Start-up 31
- Preparation 32
- Start up the FIDOR 32
- 5 Operation 33
- Status, LEDs 34
- Assignment of buttons 35
- Menu tree 36
- XXXX 37
- FIDOR menus 38
- Measuring display 41
- “List” measuring display 41
- Diagnostic 42
- .4.2.2.1 43
- Operation 44
- 5.2.5.5 Telediagnostic 44
- Parameter 45
- 5.2.6.7 Gas timing 47
- 5.2.6.8 Application area 47
- Adjustment 48
- 5.2.7.8 Drift reset 50
- 1 Select “Drift reset” 50
- 2 Confirm with <Set> 50
- Maintenance 51
- 5.2.8.3 Test gas 52
- 5.2.8.4 Standby 52
- 5.2.8.5 Configurations 52
- Factory setting 53
- 5.2.9.3 Heated line 54
- 6 Shutdown 57
- Preparations for shutdown 58
- Shutdown procedure 58
- Disposal 58
- 7 Scheduled Maintenance 59
- Maintenance intervals 60
- Scheduled Maintenance 62
- 8 Clearing Malfunctions 63
- Replacement of fuses 64
- FID does not ignite/burn 65
- Error messages 66
- Clearing Malfunctions 67
- 9 Technical Documentation 69
- Approvals 70
- Heated line 71
- Dimensions 72
- Technical data 73
- Technical Documentation 74
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