SICK DEFOR Operating instructions

SUPPLEMENTARY OPERATING INSTRUCTIONS
Title Page
Description
Operating Functions
Technical Data
Analyzer Module DEFOR
for Series GMS800

2 DEFOR · Supplementary Operating Instructions · 8013029 V2.0 · © SICK AG
Document Information
Described Product
Product name: Analyzer Module DEFOR
Basic device: Series GMS800 gas analyzers
Document ID
Title: Supplementary Operating Instructions DEFOR
Part No.: 8013029
Version: 2.0
Release: 2012-12
Manufacturer
SICK AG
Erwin-Sick-Str. 1 · D-79183 Waldkirch · Germany
Phone: [phone]
Fax: [phone]
E-mail: [e-mail]
Trademarks
Viton is a trademark of DuPont Performance Elastomers.
Other product names used in this document may be trademarks
and are only used for identification purposes.
Original documents
The English edition 8013029 of this document is an original docu-
ment of the manufacturer.
SICK AG assumes no liability for the correctness of an unauthor-
ized translation.
Please contact the manufacturer in case of doubt.
Legal information
Subject to change without notice
© SICK AG. All rights reserved.
Glossary
Warning Symbols
Signal Words
CAUTION
Hazard or unsafe practice which could result in personal injury or
property damage.
NOTICE
Hazard which could result in property damage.
Information Symbols
Cl2Chlorine (gaseous)
H2SHydrogen sulfide
IFC Interference Filter Correlation: Optical measure-
ment method using two wavelength ranges.
NH3Ammonia (gaseous)
NO Nitrogen monoxide
NO2Nitrogen dioxide
SO2Sulphur dioxide
SOPAS SICK Open Portal for Applications and Systems:
Family of computer programs to set parameters,
capture and calculate data.
SOPAS ET SOPAS Engineering Tool: PC application program to
configure modular system components.
PC Personal Computer
PTFE Polytetrafluorethylene
PVDF Polyvinylidene fluoride
Hazard (general)
Hazard by corrosive substances
Hazard by high temperature or hot surfaces
Important technical information for this product
Nice to know
Supplementary information
Link to information at another place

Contents
DEFOR · Supplementary Operating Instructions · 8013029 V2.0 · © SICK AG 3
1ImportantInformation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.1 Main operating information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.1.1 Noises . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.1.2 UV lamp service life . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.2 Application limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.3 Additional documentation/information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2 Product Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.1 Measuring system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.2 Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.2.1 Adjustment unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.2.2 Process cuvette . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3 Installation Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.1 Sample gas feed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.2 Purge gas feed for process cuvette . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4 Functions in SOPAS ET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.1 Menu tree in SOPAS ET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.2 Explanation of the menus in SOPAS ET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.3 Explanation of functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.3.1 Logbook in SOPAS ET. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.3.2 Upload (data synchronization) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.3.3 Damping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.3.4 Drift limit values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.3.5 Deleting adjustment results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.4 Adjustment Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5TechnicalData. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.1 Installation location requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
5.2 Metrological specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
5.3 Technical gas specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
5.3.1 Sample gas. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
5.3.2 Purge gas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
5.4 Materials with sample gas contact . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
5.5 Measuring ranges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
5.6 Approvals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
5.7 UV lamp . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
5.8 Auxiliary power supply for the module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Contents

Contents
4 DEFOR · Supplementary Operating Instructions · 8013029 V2.0 · © SICK AG

Important Information
DEFOR · Supplementary Operating Instructions · 8013029 V2.0 · © SICK AG 5
Subject to change without notice
DEFOR
1Important Information
Operating information
Application limitations
Additional documentation

6 DEFOR · Supplementary Operating Instructions · 8013029 V2.0 · © SICK AG
Important Information
Subject to change without notice
1.1 Main operating information
1.1.1 Noises
●Rhythmic noises are normal during operation.
●Specific noises can occur for several minutes after start-up.
1.1.2 UV lamp service life
The Analyzer module DEFOR uses a UV lamp as light source. The UV lamp has a limited ser-
vice life and probably needs to be replaced several times during the overall operating time.
Status messages of increasing importance are activated automatically when the light
intensity of the UV lamp weakens (→p. 16 [7]).
1.2 Application limitations
It is possible that another gas component contained in the sample gas can influence the
analysis of the desired measuring component (cross-sensitivity).
In such a case, a constant concentration of the “interfering gas” creates a constant devia-
tion from the true measured value every time (constant characteristic curve offset). The
deviation varies accordingly when the interfering gas concentration fluctuates.
1.3 Additional documentation/information
This document supplements the Operating Instructions for GMS800 gas analyzers. It
extends the “GMS800“ Operating Instructions with technical information on the DEFOR.
▸ Observe the delivered “GMS800” Operating Instructions.
●UV lamp service life →p. 26, §5.7
●Display of the operating hours with the PC software “SOPAS ET” →p. 14,
§4.1
●Cross-sensitivity against a certain gas is minimized automatically when the
DEFOR also measures the concentration of this gas.
●The cross-sensitivity can be minimized through computation in the control
unit when the interfering gas concentration is measured with a different
Analyzer module in the GMS800.
The “GMS800” Operating Instructions also specify all further documents
belonging to the individual device.
NOTICE:
▸ Pay primary attention to any individual information provided.

Product Description
DEFOR · Supplementary Operating Instructions · 8013029 V2.0 · © SICK AG 7
Subject to change without notice
DEFOR
2Product Description
Measuring principle
Measuring ranges

8 DEFOR · Supplementary Operating Instructions · 8013029 V2.0 · © SICK AG
Product Description
Subject to change without notice
Fig. 1 Measuring principle
M
M
M
M M
M M
IFC IFC + UVRASUVRAS
1UVlamp
2 Filter wheel unit
2a Filter wheel 1
2b Filter wheel 2
3 Collimator lens
4 Beam splitter
5Mirror
6 Sample cuvette [1]
[1] Length = 0.4/1.5/5.6/21/80/300 mm, depending on the measuring range
7 Reference cuvette [1]
8 Converging lens
9 Detector
10 Adjustment unit
M Motor
2a
1
3
4
5
2b
6
7
8 9
10
2a 2b

Product Description
DEFOR · Supplementary Operating Instructions · 8013029 V2.0 · © SICK AG 9
Subject to change without notice
2.1 Measuring system
Measuring principle
The Analyzer module DEFOR uses the fact that some gases have a specific absorption
characteristic in the ultraviolet light range. For this purpose, UV light is radiated through the
sample gas. The concentration of a gas component in a gas mixture can be determined
through suitable selection of the light wavelength and selective absorption measurement.
The Analyzer module DEFOR can, in this way, analyze the concentration of the gases Cl2,
H2S, NO, NO2, NH3, SO2and further gases.
The Analyzer module DEFOR can simultaneously measure up to 3 gas components.
Measuring method
●The Analyzer module DEFOR uses interference filter correlation (IFC) for most gas com-
ponents. Measuring and reference radiation are created alternately by swiveling two dif-
ferent interference filters into the beam path (filter wheel [2a]).
●Gas filter correlation (UVRAS) is used for NO. This method creates the reference radia-
tion by swiveling a gas filter filled with the relevant gas into the beam path (filter wheel
[2b]).
●Both measuring methods are combined for joint measurement of NO and other gases
(both filter wheels [2a]+[2b] are used).
●The physical state of the measuring system is captured and compensated using a refer-
ence beam path through a reference cuvette.
Analyzer module layout
– Beam source is a special UV gas discharge lamp (→p. 8, Fig. 1 [1]) that emits both broad-
band as well as NO-specific radiation components.
– Thermostat-controlled filter wheel unit [2] keeps the optic filters at a constant tempera-
ture. This minimizes the influence of external temperature changes.
– Lenses [3][8], beam splitter [4] and mirror [5] direct the beam path.
– Sample gas flows through sample cuvette [6]. Reference cuvette [7] is either filled with
a neutral gas or has span gas flowing through (option).
– Detectors [9] capture the radiation intensity created with the various filters.
– Measurement signals are amplified electronically and digitally evaluated. The structure
symmetry compensates proportional and symmetric signal drifts in the best possible
way.
–Themeasuringsystemcanbefitted with an adjustment unit ([10] →p. 10, §2.2.1).
The specific properties of the desired measuring components and the desired
physical measuring range each demand an individual metrological concept for
the Analyzer module.

10 DEFOR · Supplementary Operating Instructions · 8013029 V2.0 · © SICK AG
Product Description
Subject to change without notice
2.2 Options
2.2.1 Adjustment unit
The adjustment unit simplifies and accelerates routine adjustments.
Zero gas flows through the Analyzer module during an adjustment procedure with an
adjustment unit. The first step is a zero point adjustment. An optical filter is swiveled auto-
matically into the beam path of the sample cuvette for the subsequent reference point
adjustment – and thus simulates the presence of a span gas in the sample cuvette. The
nominal values of this simulation are determined at the manufacturer's factory.
This means only a zero gas is required for an adjustment procedure with adjustment unit; a
span gas for reference point adjustment is not necessary. The procedure can be started
manually or can run automatically (requires automated zero gas feed).
2.2.2 Process cuvette
The versions with process cuvette are intended for applications with dangerous sample
gases where it must be ensured the sample gas does not flow into the gas analyzer when a
window of the sample cuvette becomes leaky.
In the process cuvette, the measuring compartment is flanked by purge gas compartments
through which purge gas flows continuously (→Fig. 2). When a measuring compartment
window is leaky, the emerging sample gas flows into the purge gas compartment and from
there out of the gas analyzer with the purge gas.
The GMS800 therefore requires continuous purge gas for versions with a process cuvette
(→p. 12, §3.2).
Fig. 2 Process cuvette
The adjustment unit should be checked and readjusted in larger intervals dur-
ing operation (recommendation: Every 6 months). For this purpose, the Ana-
lyzer module must be adjusted with real test gases beforehand.
A
A
A A
1 Purge gas compartment
2 Measuring compartment
3 Purge gas compartment
4 Process cuvette
5 Spacer tube
6 Reference cuvette
41 2 3 65

Installation Information
DEFOR · Supplementary Operating Instructions · 8013029 V2.0 · © SICK AG 11
Subject to change without notice
DEFOR
3Installation Information
Sample gas feed
Purge gas feed for process cuvette

12 DEFOR · Supplementary Operating Instructions · 8013029 V2.0 · © SICK AG
Installation Information
Subject to change without notice
3.1 Sample gas feed
▸ Observe the information on sample gas feed in the “Series GMS800” Operating Instruc-
tions.
3.2 Purge gas feed for process cuvette
Only valid for versions with process cuvette (option →p. 10, §2.2.2 )
In versions with process cuvette, the GMS800 enclosure has additional “purge gas inlet”
und “purge gas outlet” gas connections.
1Install an external continuous purge gas supply for GMS800.
Suitable purge gas: Chemically neutral gas (inert gas) or gas mixture suitable for dilut-
ing and transporting the measured gas without danger.
2Feed the purge gas through the “purge gas inlet“ gas connection on the enclosure.
Allowable pressure and volume flow: →p. 25, §5.3.2
3Install a gas line on the “purge gas outlet” through which the purge gas and emerged
sample gas are reliably discharged.
▸ Lead the gas line to a safe position where emerged sample gas cannot create any
danger.
▸ Recommendation: Attach appropriate warning signs to the gas line or gas outlet
informing about the hazardousness of the sample gas.
Gas connections type and version →Supplementary Operating Instructions for
Enclosure

Functions in SOPAS ET
DEFOR · Supplementary Operating Instructions · 8013029 V2.0 · © SICK AG 13
Subject to change without notice
DEFOR
4Functions in SOPAS ET
Menu functions in the PC program “SOPAS ET”
Menu tree
Explanations
●Instructions for the PC program “SOPAS ET” →User Information for the pro-
gram
●Exemplary menu representations →Technical Information “Basic Control
Unit (BCU)” (contains information for operating with SOPAS ET)

14 DEFOR · Supplementary Operating Instructions · 8013029 V2.0 · © SICK AG
Functions in SOPAS ET
Subject to change without notice
4.1 Menu tree in SOPAS ET
User level:O Operator (standard) A Authorized operator
Access rights: ○Viewing ●Setting up/starting
Directory Menu contents O A Explanation
S800_DEFOR ○○
Measured value display ○○
Measuring component 1 Component ○○ →p. 16 [1]
Measured value ○○ →p. 16 [2]
Unit ○○ →p. 16 [3]
Measuring component 2 [1] ○○
↓
Measuring component 10 [1] ○○
Diagnosis ○○
Module state Failure ○○
Maintenance request ○○ →p. 16 [4]
Function(s) active ○○
Uncertain state ○○
Logbook Pos.|Date|Source| … – ○→p. 18, §4.3.1
Operating hours – ○
Lamp h–○→p. 16 [5]
Measuring component 1 ○○
Name / unit Component ○● →p. 16 [1]
Unit ○○ →p. 16 [2]
State Failure ○○
Maintenance request ○○ →p. 16 [4]
Function(s) active ○○
Uncertain state ○○
Validation measurement (QAL3) Zero point ○○
Reference point ○○
Measuring component 2 [1] ○○
↓
Measuring component 10 [1] ○○
UV lamp – ○
Physical component 1 Intensity …% – ○→p. 16 [6]
Failure – ○
Uncertain – ○→p. 16 [7]
Maintenance – ○
OK – ○
Physical component 2 [1] –○
Physical component 3 [1] –○
Parameter ○○
Sampling point Description – ●→p. 16 [8]
RS485 interface Module address – ○→p. 16 [9]
Baud rate – ●
Data bits – ●→p. 16 [10]
Stop bits – ●
Parity – ●
Operating mode Actual – ○→p. 16 [11]
Target – ○→p. 16 [12]
Measuring component 1 ○○
Physical meas. range Component ○● →p. 16 [1]
Unit ○○ →p. 16 [3]
Start value ○○ →p. 16 [13]
End value ○○ →p. 16 [14]
Base value ○○ →p. 16 [15]
Measuring channel ○○ →p. 16 [16]
Precision ○○ →p. 17 [17]

Functions in SOPAS ET
DEFOR · Supplementary Operating Instructions · 8013029 V2.0 · © SICK AG 15
Subject to change without notice
Damping – ●
Damping (el. T90%) Time constant [s] – ●
Dynamic damping Status [On/Off] – ●→p. 19, §4.3.3
Time constant [s] – ●
Threshold – ●
Measuring component 2 [1] ○○
↓
Measuring component 10 [1] ○○
Adjustment ○○
Measuring component 1 ○○
Drift limit value Zero point – ○→p. 20, §4.3.4
Reference point – ○
Adjustment results ○○
Adjustment result Zero point ○○
Reference point ○○
Drifts Zero point ○○ →p. 17 [18]
Reference point ○○
Delete results [Delete] – ●→p. 20, §4.3.5
Measuring component 2 [1] ○○
↓
Measuring component 10 [1] ○○
Maintenance –○
Maintenance flag [On]/[Off] – ●→p. 17 [20]
Settings – ○
User settings [Backup] – ●
[Restore last user settings] – ●→p. 17 [21]
[Restore next to last user settings] – ●
Factory settings [Restore] – ●→p. 17 [22]
Factory settings ○○
Identification ○○
ID numbers Serial number ○○
Material No. ○○
Hardware version ○○ →p. 17 [23]
Software version ○○
Software date ○○
Production release Year | Month | Day – ○→p. 17 [24]
[1] If fitted.
Directory Menu contents O A Explanation

16 DEFOR · Supplementary Operating Instructions · 8013029 V2.0 · © SICK AG
Functions in SOPAS ET
Subject to change without notice
4.2 Explanation of the menus in SOPAS ET
No. Description Explanation
1 Component Name of measuring component
2 Measured value Actual measured value of measuring component
3 Unit Physical unit of measured value
4 Failure LED symbol
●Significance: Module not ready for operation
●Possible causes: Malfunction, defect
Maintenance request LED symbol
●Significance: Advance warning before internal technical
limits reached.
●Possible causes: Drift limit, operating hours, lamp intensity
Function(s) active LED symbol
●Significance: At least one internal function active that
impairs or hinders normal module measuring function.
●Possible causes: Adjustment procedure running, validation
measurement running
Uncertain state LED symbol
●Significance: Actual measured values are unreliable.
●Possible causes: Heating up phase, internal over/under
temperature, adjustment procedure programming not
plausible
5 Operating hours Number of operating hours of the UV lamp fitted
6 Intensity …% Actual light intensity in the reference beam path for the asso-
ciated measured component (with the specific optical filter in
the beam path) relative to the new condition of the UV lamp;
evaluated automatically (→[7]; UV lamp service life →p. 26,
5.7)
7 Failure UV lamp status (evaluation of intensity); “OK” = full intensity,
“Maintenance” = UV lamp replacement recommended;
“Uncertain” = correct measuring function questionable; “Fail-
ure” = measurement no longer possible. The module status
flags are activated accordingly (→[4]).
Uncertain
Maintenance
OK
8 Description Freely selectable text for module name
9 Module address Internal CAN bus address of module (defined by hardware set-
ting in module)
10 Baud rate Transfer speed (standard: 9600)
Data bits Number of data bits (standard: 8)
The GMS800 only uses the 7-bit range (ASCII code 0 … 127)
but can also communicate in 8-bit format.
Stop bits Number of stop bits (1 or 2; standard: 2)
Parity Additional identification for automatic monitoring of character
transfers; [Even], [Odd], [None]. – Standard: None
11 Actual Internal operating module state:
●[Heating] = heating up phase (measured values unreliable)
●[Measuring] = measuring operation (normal operating
mode)
●[Halt] = stopped electronically (not ready for operation)
12 Target Default operating mode through entry or software function;
should become actual operating mode after a certain time
(can take up to 1 hour during the heating up time after start-
up).
13 Start value Start value of physical measuring range
14 End value End value of physical measuring range
15 Base value Internal physical base value of measuring range
16 Measuring channel Internal measuring channel for measuring component

Functions in SOPAS ET
DEFOR · Supplementary Operating Instructions · 8013029 V2.0 · © SICK AG 17
Subject to change without notice
17 Precision [On] = higher measuring precision is available for measuring
range 2 (effective in range 0 … 20% of physical measuring
range)
18 Drifts ●Last = since last adjustment
●Total = since last drift calculation initialization
19 Delete results [Delete] = Set all drift values to “0”.
20 Maintenance flag [On] = Status “Maintenance” is activated (here as signal for
active maintenance work)
21 User settings ●Backup = save a copy of the actual module settings.
●Restore = overwrite the actual module settings with the
saved copy. [1]
22 Factory settings Overwrite the actual module settings with the original settings
from the factory.[1]
▸ Recommendation: Save the current module settings first
(→“User settings”).
23 Serial number Individual module serial number
Material No. Identification number of module version
Hardware version Module electronics version number
Software version Module software version number
Software date Module software revision
24 Production release Module date of manufacture
[1] A warm start is then done automatically.
No. Description Explanation

18 DEFOR · Supplementary Operating Instructions · 8013029 V2.0 · © SICK AG
Functions in SOPAS ET
Subject to change without notice
4.3 Explanation of functions
4.3.1 Logbook in SOPAS ET
The Logbook Table shows the last 20 internal messages.
Fig. 3 Menu “[Module name]/Diagnosis/Logbook” in PC program “SOPAS-ET” (example)
4.3.2 Upload (data synchronization)
Only applicable when the “SOPAS ET” PC software is used. Not applicable for systems
without control unit (special versions).
The new data are not transferred automatically to “SOPAS ET” after settings for a module
have been changed with the menu functions of the control unit. “SOPAS ET” continues
using the previous data.
▸ To transfer the current data of a module to “SOPAS ET”:Start the “Upload all parame-
ters from device” function in “SOPAS ET” once.
Column Meaning
1 Sequential number in Logbook
2Time of last message change
3
4 “System” = measuring system (hardware)
“MV” = measuring component (measurement)
5 Short message text, e.g. “F measured value”.
The character prefix classifies the message:
F = Failure
C = Check (adjustment/validation)
U = Uncertain (extra information)
M = Maintenance
E = Extended (status message)
6 Current message status
7 Total count of activations
1 2 3 4 5 6 7

Functions in SOPAS ET
DEFOR · Supplementary Operating Instructions · 8013029 V2.0 · © SICK AG 19
Subject to change without notice
4.3.3 Damping
Constant damping
When “damping” has been programmed, the average value from the current measured
value and the previous measured values (floating averaging) are displayed instead of the
current measured value.
Possible uses include:
– Damping metrological measured value fluctuations (noise)
– Smoothing fluctuating measured values when only the average value is relevant
Damping is done in the Analyzer module and therefore affects all measured value displays
and outputs. It is also active during an adjustment procedure.
Dynamic damping
“Dynamic damping” serves to compensate measured value fluctuations without signifi-
cantly increasing the reaction time. Dynamic damping is automatically deactivated when
the measured value changes rapidly and strongly as against “normal” damping. This allows
“smoothing” continuous minor measured value fluctuations but rapid measured value
changes are still displayed without delay. Dynamic behavior is determined with the “Thresh-
old” parameter:
– When the measured values change only slowly, dynamic damping functions as constant
damping.
– When the difference of successive measured values is greater than the set limit,
dynamic damping is terminated automatically and remains disabled as long as the
measured values continue to change rapidly.
– Dynamic damping is active again when measured value differences are below the limit
again (which means measured values changes remain slight).
Dynamic damping also affects all measured value displays and outputs.
●Increasing damping normally increases the reaction time (90% time) of the
gas analysis system accordingly.
●Reducing damping can possibly increase the measurement signal “noise”
(measuring turbulence).
●Time constant = 0 s means: No damping.
CAUTION: Risk of incorrect adjustment
The “Measuring time, test gas” must be at least 150% of the set damping time
constant during adjustments.
▸ When damping has been reset or increased: Check whether adjustment
settings need to be adapted.

20 DEFOR · Supplementary Operating Instructions · 8013029 V2.0 · © SICK AG
Functions in SOPAS ET
Subject to change without notice
4.3.4 Drift limit values
Purpose
Analyzer module drifts are caused, for example, by contamination, mechanical changes or
aging effects. The total drift (i.e. the deviation from original state) increases gradually. It is
not practical to keep compensating an ever increasing total drift through computation.
Inspect and reset the Analyzer module when total drift has become very large.
Drift limit values monitor total drift automatically. These also protect against erroneous
adjustments.
Functionality
After every adjustment, an Analyzer module compares the calculated total drift with the
drift limit value. Drift limit value violation is reported in two stages:
●Status “M” (Maintenance request) is activated when the total drift reaches 100 … 120%
of the drift limit value.
●Status “F” (Failure) is activated when the total drift reaches more than 120% of the drift
limit value.
●When an adjustment procedure shows that a calculated drift has reached more than
150% of the drift limit value, the result from this adjustment procedure is ignored and
the previous adjustment remains valid.
4.3.5 Deleting adjustment results
The “Delete results” function deletes all determined drift values of a measuring compo-
nent. Drift limit values then refer to new drift values.
The data of the previous adjustment which was performed before are then no longer dis-
played. Test gas settings (e. g. nominal value) are not changed.
●The drift limit values are set in the factory (standard value: 10%).
●A Service function is available to reset all drift values to “0” (Drift reset).
This is useful after Analyzer module maintenance when this has estab-
lished a new original state.
CAUTION: Risk of incorrect adjustment
If very large drift values are displayed after a manual adjustment procedure
(→Operating Instructions “Basic Control Unit (BCU)”), a test gas used probably
did not match the relevant test gas setting or gas feed was interrupted – and
the adjustment result was still accepted.
▸ Do not delete incorrect adjustment results, but repeat the adjustment care-
fully.
▸ Do not use the deletion of adjustment results to nullify large drift values
caused by extensive physical changes of an Analyzer module. Instead,
clean the Analyzer module or perform an adjustment.[1]
▸ After an Analyzer module has been cleaned, altered or exchanged:
Delete the relevant adjustment results and perform an adjustment.
[1] By the manufacturer's Customer Service or authorized skilled persons with appropriate training.