© Siemens AG 2015
Continuous Gas Analyzers, extractive
OXYMAT 61
1
General information
■ Overview
■ Design
• 19" rack unit with 4 HU for installation
- in hinged frame
- in cabinets with or without telescope rails
• Front plate can be swung down for servicing purposes
(laptop connection)
• Gas connections for sample gas inlet and outlet;
pipe diameter 6 mm or ¼"
• Gas and electrical connections at the rear
The measuring principle of the OXYMAT 61 gas analyzers is
based on the paramagnetic alternating pressure method and is
used to measure oxygen in gases in standard applications.
■ Benefits
•
•
•
•
Integrated pump for reference gas (option, e.g. ambient air)
High linearity
Compact design
Physically suppressed zero possible
■ Application
Application areas
• Environmental protection
• Boiler control in firing systems
• Quality monitoring (e.g. in ultra-pure gases)
• Process exhaust monitoring
• Process optimization
Further applications
• Chemical plants
• Gas manufacturers
• Research and development
Display and control panel
• Large LCD field for simultaneous display of:
- Measured value
- Status bar
- Measuring ranges
• Contrast of LCD panel adjustable using menu
• Permanent LED backlighting
• Washable membrane keyboard with five softkeys
• Menu-driven operation for parameterization, test functions,
adjustment
• User help in plain text
• Graphic display of concentration trend; programmable time
intervals
• Bilingual operating software German/English, English/
Spanish, French/English, Spanish/English, Italian/English
Input and outputs
• One analog output per medium (from 0, 2, 4 to 20 mA; NAMUR
parameterizable)
• Six binary inputs freely configurable (e.g. for measurement
range switchover, processing of external signals from sample
preparation)
• Six relay outputs freely configurable (failure, maintenance request, maintenance switch, threshold alarm, external magnetic valves)
• Two analog inputs configurable (e.g. correction of cross-interference, external pressure sensor)
• Extension with eight additional binary inputs and eight additional relay outputs, e.g. for autocalibration with up to four calibration gases
Communication
RS 485 present in basic unit (connection from the rear).
Options
• RS 485/RS 232 converter
• RS 485/Ethernet converter
• RS 485/USB converter
• Connection to networks via PROFIBUS DP/PA interface
• SIPROM GA software as service and maintenance tool
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Siemens AP 01 · 2015
© Siemens AG 2015
Continuous Gas Analyzers, extractive
OXYMAT 61
General information
LED backlit graphic
display and
membrane keyboard
with noticeable click
Status line to display
the analyzer status
(programmable)
Two code levels
according to NAMUR
(maintenance and
specialist level)
Easy operation
menu controlusing
the softkeys
Display of
concentrations as
numbers and bargraph
Display of current
measuring ranges
Display of
start-of-scale and
full-scale values
ESC key
to abort inputs
Keyboard to
enter values
INFO key
for help in plain text
CLEAR key
to delete inputs
ENTER key
to accept
input values
MEAS key
to return to
measurement mode
OXYMAT 61, membrane keyboard and graphic display
Designs – Parts touched by sample gas, standard
Gas path
19" rack unit
Bushing
Stainless steel, mat. no. 1.4571
Hose
FKM (Viton)
Sample chamber
Stainless steel, mat. no. 1.4571
Fittings for sample chamber
Stainless steel, mat. no. 1.4571
Restrictor
PTFE (Teflon)
O-rings
FKM (Viton)
Hose coupling
Polyamide 6
Flow indicator
Measurement pipe
Variable area
Suspension boundary
Angle pieces
Duran glass
Duran glass, black
PTFE (Teflon)
FKM (Viton)
Pressure switch
Membrane
Enclosure
FKM (Viton)
PA 6.3 T
With hoses
Options
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1
© Siemens AG 2015
Continuous Gas Analyzers, extractive
OXYMAT 61
1
General information
Gas path
Legend for the gas path figures
1
Sample gas inlet
9
Purging gas
2
Sample gas outlet
10
Restrictor in reference gas path (outlet)
3
Not used
11
Pressure switch for reference gas monitoring
4
Reference gas inlet
12
Pump
5
Restrictor in reference gas path
13
Filter
6
O2 physical system
14
Flow indicator in sample gas path (option)
7
Restrictor in sample gas path
15
Pressure sensor
8
Pressure switch in sample gas path (option)
F
14
P
7
8
1
3
15
2
6
10
4
5
12
P
13
11
9
Gas path OXYMAT 61 with integrated reference gas pump (connection for 1 100 hPa, absolute)
F
14
P
7
8
1
3
15
2
6
4
5
13
9
Gas path OXYMAT 61 with reference gas connection 3 000 to 5 000 hPa, absolute
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Siemens AP 01 · 2015
© Siemens AG 2015
Continuous Gas Analyzers, extractive
OXYMAT 61
General information
■ Function
In contrast to almost all other gases, oxygen is paramagnetic.
This property is utilized as the measuring principle by the
OXYMAT 61 gas analyzers.
1
Oxygen molecules in an inhomogeneous magnetic field are
drawn in the direction of increased field strength due to their
paramagnetism. When two gases with different oxygen contents
meet in a magnetic field, a pressure difference is produced between them.
2
In the case of OXYMAT 61, one gas (1) is a reference gas (N2,
O2 or air), the other is the sample gas (5). The reference gas is
introduced into the sample chamber (6) through two channels
(3). One of these reference gas streams meets the sample gas
within the area of a magnetic field (7). Because the two channels
are connected, the pressure, which is proportional to the oxygen
content, causes a cross flow. This flow is converted into an electric signal by a microflow sensor (4).
2
4
3
3
DP
5
OXYMAT 61, principle of operation
6
The microflow sensor consists of two nickel-plated grids heated
to approximately 120 ºC, which, along with two supplementary
resistors, form a Wheatstone bridge. The pulsating flow results
in a change in the resistance of the Ni grids. This leads to an offset in the bridge which is dependent on the oxygen concentration of the sample gas.
7
8
O2
Because the microflow sensor is located in the reference gas
stream, the measurement is not influenced by the thermal conductivity, the specific heat or the internal friction of the sample
gas. This also provides a high degree of corrosion resistance
because the microflow sensor is not exposed to the direct influence of the sample gas.
O2
O2
O2
O2
By using a magnetic field with alternating strength (8), the effect
of the background flow in the microflow sensor is not detected,
and the measurement is thus independent of the instrument’s
operating position.
The sample chamber is directly in the sample path and has a
small volume, and the microflow sensor is a low-lag sensor. This
results in a very short response time for the OXYMAT 61.
Note
The sample gases must be fed into the analyzers free of dust.
Condensation should be prevented from occurring in the sample
chambers. Therefore, gas modified for the measuring tasks is
necessary in most application cases.
Essential characteristics
• Four freely parameterizable measuring ranges, also with suppressed zero point, all measuring ranges linear
• Galvanically isolated measured-value output 0/2/4 to 20 mA
(also inverted)
• Autoranging possible; remote switching is also possible
• Storage of measured values possible during adjustments
• Wide range of selectable time constants (static/dynamic noise
suppression); i.e. the response time of the device can be
adapted to the respective measuring task
• Easy handling thanks to menu-driven operation
• Low long-term drift
• Two control levels with their own authorization codes for the
prevention of accidental and unauthorized operator interventions
• Automatic, parameterizable measuring range calibration
• Operation based on the NAMUR recommendation
• Monitoring of sample gas (option)
1
2
3
4
5
6
7
8
9
9
Reference gas inlet
Restrictors
Reference gas channels
Microflow sensor for measurement
Sample gas inlet
Sample cell
Paramagnetic effect
Electromagnet with alternating field strength
Sample gas and reference gas outlet
OXYMAT 61, principle of operation
• Customer-specific analyzer options such as:
- Customer acceptance
- TAG labels
- Drift recording
• Simple handling using a numerical membrane keyboard and
operator prompting
• Short response time
• Reference gas supply either externally (N2, O2 or air, approx.
3 000 hPa) or via built-in reference gas pump (ambient air,
approx. 1 100 hPa abs.)
• Monitoring of reference gas with reference gas connection;
only on version with built-in reference gas pump
• Different smallest measuring ranges, depending on version
2.0 % or 5.0 % O2
• Internal pressure sensor for correction of fluctuations in the
sample gas pressure
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© Siemens AG 2015
Continuous Gas Analyzers, extractive
OXYMAT 61
1
General information
Correction of zero error / cross-sensitivities
Accompanying gas
(concentration 100 vol.%)
Deviation from zero point
in vol. % O2 absolute
Accompanying gas
(concentration 100 vol.%)
Organic gases
Deviation from zero point
in vol. % O2 absolute
Inert gases
Ethane C2H6
-0.49
Helium He
+0.33
Ethene (ethylene) C2H4
-0.22
Neon Ne
+0.17
Ethine (acetylene) C2H2
-0.29
Argon Ar
-0.25
1.2 butadiene C4H6
-0.65
Krypton Kr
-0.55
1.3 butadiene C4H6
-0.49
Xenon Xe
-1.05
n-butane C4H10
-1.26
iso-butane C4H10
-1.30
Inorganic gases
1-butene C4H8
-0.96
Ammonia NH3
-0.20
iso-butene C4H8
-1.06
Hydrogen bromide HBr
-0.76
Dichlorodifluoromethane (R12)
CCl2F2
-1.32
Chlorine Cl2
-0.94
Hydrogen chloride HCl
-0.35
Acetic acid CH3COOH
-0.64
-0.23
n-heptane C7H16
-2.40
Dinitrogen monoxide N2O
Hydrogen fluoride HF
+0.10
n-hexane C6H14
-2.02
Hydrogen iodide HI
-1.19
Cyclo-hexane C6H12
-1.84
-0.30
Methane CH4
-0.18
Carbon dioxide CO2
Carbon monoxide CO
+0.07
Methanol CH3OH
-0.31
Nitrogen oxide NO
+42.94
n-octane C8H18
-2.78
0.00
n-pentane C5H12
-1.68
Nitrogen N2
+20.00
iso-pentane C5H12
-1.49
Nitrogen dioxide NO2
-0.87
Sulfur dioxide SO2
-0.20
Propane C3H8
-1.05
Propylene C3H6
-0.64
Sulfur hexafluoride SF6
-0.44
Trichlorofluoromethane (R11)
CCl3F
-1.63
Hydrogen sulfide H2S
Water H2O
-0.03
Hydrogen H2
+0.26
Vinyl chloride C2H3Cl
-0.77
Vinyl fluoride C2H3F
-0.55
1.1 vinylidene chloride C2H2Cl2
-1.22
Table 1: Zero error due to diamagnetism or paramagnetism of some accompanying gases with nitrogen as the reference gas at 60 °C and 1 000 hPa
absolute (according to IEC 1207/3)
Conversion to other temperatures:
The deviations from the zero point listed in Table 1 must be multiplied by a correction factor (k):
• with diamagnetic gases: k = 333 K / (ϑ [°C] + 273 K)
• with paramagnetic gases: k = [333 K / (ϑ [°C] + 273 K)]2
(all diamagnetic gases have a negative deviation∞from zero point)
Reference gases
Measuring range
Recommended reference gas
Reference gas connection pressure Remarks
0 to … vol.% O2
N2
... to 100 vol.% O2 (suppressed
zero point with full-scale value
100 vol.% O2)
O2
2 000 … 4 000 hPa above sample gas The reference gas flow is set
pressure (max. 5 000 hPa absolute)
automatically to 5 … 10 ml/min
Around 21 vol.% O2 (suppressed
zero point with 21 vol.% O2 within
the measuring span)
Air
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Siemens AP 01 · 2015
Atmospheric pressure with internal
reference gas pump
© Siemens AG 2015
Continuous Gas Analyzers, extractive
OXYMAT 61
19" rack unit
■ Technical specifications
General information
Measuring ranges
4, internally and externally switchable; autoranging is also possible
Smallest possible span (relating to
sample gas pressure 1 000 hPa
absolute, 0.5 l/min sample gas flow
and 25 °C ambient temperature)
2 vol. % or 5 vol. % O2
Largest possible measuring span
100 vol. % O2
Measuring ranges with suppressed
zero point
Any zero point within
0 ... 100 vol.% can be implemented, provided that a suitable
reference gas is used
Operating position
Front wall, vertical
Conformity
CE mark in accordance with
EN 50081-1, EN 50082-2
Design, enclosure
Degree of protection
IP20 according to EN 60529
Weight
Approx. 13 kg
Electrical characteristics
Measuring response (relating to sample gas pressure 1 013 hPa
absolute, 0.5 l/min sample gas flow and 25 °C ambient temperature)
Output signal fluctuation
< ± 0.75 % of the smallest possible measuring range according to
rating plate, with electronic
damping constant of 1 s (corresponds to ± 0.25 % at 2 σ)
Zero point drift
< ± 0.5 %/month of the smallest
possible span according to rating
plate
Measured-value drift
< ± 0.5 %/month of the current
measuring range
Repeatability
< 1 % of the current measuring
range
Detection limit
1 % of the current measuring
range
Linearity error
< 1 % of the current measuring
range
Influencing variable (relating to sample gas pressure 1 013 hPa
absolute, 0.5 l/min sample gas flow and 25 °C ambient temperature)
Ambient temperature
< 2 %/10 K with span 5 %
Approx. 45 VA
Sample gas pressure (with air
(100 hPa) as internal reference gas
supply, correction of the atmospheric pressure fluctuations is only
possible if the sample gas can vent
to ambient air.)
In accordance with standard
requirements of NAMUR NE21
(08/98)
• When pressure compensation
has been switched off: < 2 % of
the current measuring
range/1 % pressure change
• When pressure compensation
has been switched on: < 0.2 %
of the current measuring
range/1 % pressure change
Accompanying gases
Deviation from zero point corresponding to paramagnetic or diamagnetic deviation of
accompanying gas (see table)
Sample gas flow at zero point
< 1 % of the current measuring
range according to rating plate
with a change in flow of 0.1 l/min
within the permissible flow range
Power supply
< 0.1 % of the current measuring
range with rated voltage ± 10 %
Power supply
100 … 120 V AC (nominal range
of use 90 … 132 V), 48 … 63 Hz
or 200 … 240 V AC (nominal
range of use 180 … 264 V),
48 … 63 Hz
Power consumption
EMC
(Electromagnetic Compatibility)
Electrical safety
According to EN 61010-1,
overvoltage category III
Fuse values
100 ... 120 V: 1.0 T/250
200 ... 240 V: 0.63 T/250
Gas inlet conditions
Permissible sample gas pressure
• External reference gas supply
800 … 1 200 hPa absolute
• With integrated pump
Atmospheric pressure ± 50 hPa
Electrical inputs and outputs
Sample gas flow
18 … 60 l/h (0.3 … 1 l/min)
Analog output
Sample gas temperature
Min. 0 to max. 50 °C, but above
the dew point
0/2/4 … 20 mA, isolated;
max. load 750 Ω
Relay outputs
Sample gas humidity
< 90 % relative humidity
Reference gas pressure (high-pressure version)
2 000 ... 4 000 hPa above sample gas pressure, but max.
5 000 hPa absolute (version
without reference gas pump)
6, with changeover contacts,
freely parameterizable, e.g. for
measuring range identification;
load: 24 V AC/DC/1 A, potentialfree
Analog inputs
2, dimensioned for
0/2/4 … 20 mA for external pressure sensor and accompanying
gas influence correction (correction of cross-interference)
Binary inputs
6, designed for 24 V, isolated,
freely parameterizable, e.g. for
measuring range switchover
Serial interface
RS 485
Options
AUTOCAL function with 8 additional binary inputs and relay outputs, also with PROFIBUS PA or
PROFIBUS DP
Reference gas pressure (low-pressure version) with external pump
Min. 100 hPa above sample gas
pressure
Dynamic response
Warm-up period
At room temperature < 30 min
(the technical specification will be
met after 2 hours)
Delayed display (T90)
3.5 s
Damping (electrical time constant)
0 … 100 s, parameterizable
Dead time (purging time of the gas
path in the unit at 1 l/min)
Approximately 0.5 ... 2.5 s,
depending on version
Time for device-internal signal processing
<1s
Climatic conditions
Permissible ambient temperature
-30 … +70 °C during storage and
transportation
5 … 45 °C during operation
Permissible humidity
< 90 % relative humidity as
annual average, during storage
and transportation (must not fall
below dew point)
Pressure correction range
Pressure sensor internal
500 … 2 000 hPa, absolute
(see gas inlet conditions for permissible sample gas pressure)
Siemens AP 01 · 2015
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© Siemens AG 2015
Continuous Gas Analyzers, extractive
OXYMAT 61
1
19" rack unit
Selection and ordering data
Article No.
7MB2001- 7 7 A 0 0 - 7 7 7 7
OXYMAT 61 gas analyzer
19" rack unit for installation in cabinets
Cannot be combined
Click on the Article No. for the online configuration in the PIA Life Cycle Portal.
Gas connections for sample gas and reference gas
Pipe with 6 mm outer diameter
Pipe with ¼" outer diameter
0
1
Smallest possible measuring span O2
2 % Reference gas pressure 3 000 hPa
2 % reference gas supply with internal pump
5 % Reference gas pressure 3 000 hPa
5 % reference gas supply with internal pump
C
D
E
F
D
Y02
F
Y02
Power supply
0
1
100 ... 120 V AC, 48 ... 63 Hz
200 ... 240 V AC, 48 ... 63 Hz
Sample gas monitoring
A
D
Without
With (incl. flow indicator and pressure switch)
Add-on electronics
A
Without
AUTOCAL function
• With 8 additional digital inputs/outputs
• With serial interface for the automotive industry (AK)
B
D
• With 8 additional digital inputs/outputs and PROFIBUS PA interface
• With 8 additional digital inputs/outputs and PROFIBUS DP interface
E
F
Language
German
English
French
Spanish
Italian
0
1
2
3
4
Additional versions
Order code
Add "-Z" to Article No. and specify Order code
Telescopic rails (2 units)
A31
TAG labels (specific lettering based on customer information)
B03
Attenuation element for sample gas
B04
SIL conformity declaration (SIL 2) Functional Safety according to IEC 61508 and
IEC 61511
C20
Clean for O2 service (specially cleaned gas path)
Y02
Measuring range indication in plain text, if different from the standard
setting1)
Y11
Accessories
Article No.
RS 485/Ethernet converter
RS 485/RS 232 converter
RS 485/USB converter
A5E00852383
C79451-Z1589-U1
A5E00852382
AUTOCAL function each with 8 digital inputs/outputs
AUTOCAL function 8 digital inputs/outputs each and PROFIBUS PA
AUTOCAL function 8 digital inputs/outputs each and PROFIBUS DP
C79451-A3480-D511
A5E00057307
A5E00057312
Set of Torx screwdrivers
A5E34821625
1)
Standard setting:
1/158
Measuring range 1: 0 to smallest measuring span
Measuring range 2: 0 to 10 %
Measuring range 3: 0 to 25 %
Measuring range 4: 0 to 100 %
Siemens AP 01 · 2015
Y02
© Siemens AG 2015
Continuous Gas Analyzers, extractive
OXYMAT 61
19" rack unit
■ Dimensional drawings
384.5
351.5
27.5
15.6
4
128
173
82
149.5
172
37.7
101.6
177
s
M4
86.5
2;<0$7
465
483
132
411.5
104
320
345
36
0
440
OXYMAT 61, 19“ unit, dimensions in mm
Siemens AP 01 · 2015
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1
© Siemens AG 2015
Continuous Gas Analyzers, extractive
OXYMAT 61
1
19" rack unit
■ Schematics
Pin assignment (electrical connections)
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0
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9
0
*1'
5B/HYHO1
1&
5'7'1
5'7'3
5B/HYHO3
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WHUPLQDWLQJUHVLVWRUVWRSLQVDQG
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0
0
0
0
*1'
1&
1&
$QDORJRXWSXW3
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0
*1'
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99
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OXYMAT 61, 19“ unit, pin assignment
1/160
Siemens AP 01 · 2015
1RWH
$OOFDEOHVWRWKHFRQQHFWRUVRUWHUPLQDO
EORFNVPXVWEHVKLHOGHGDQGUHVWDJDLQVWWKH
HQFORVXUHSRWHQWLDO
© Siemens AG 2015
Continuous Gas Analyzers, extractive
OXYMAT 61
19" rack unit
Pin assignment (electrical connections)
Connector SUB-D 37F (option)
M
37
19
18
36
17
35
16
34
15
33
14
32
GND
NC
NC
Binary input 14-P
Binary input 13-P
Binary input 12-P
Binary input 11-P
Binary input 10-P
Binary input 9-P
Binary input 8-P
Binary input 7-P
Binary input 7 to 14-N
Isolated
via optocoupler
"0" = 0 V (0 ... 4.5 V)
"1" = 24 V (13 ... 33 V)
13
31
Relay 14
12
30
11
Relay 13
29
10
28
Relay 12
9
27
8
Relay 11
Contact load
max. 24 V/1 A, AD/DC
Relay 10
for shown
relay contact position,
the relay has zero current
26
7
25
6
24
5
Relay 9
23
4
22
Relay 8
3
21
20
M
Connector SUB-D 9F-X90
PROFIBUS DP
5
9
4
8
3
2
Relay 7
1
GND
Optional
Connector SUB-D 9M-X90
PROFIBUS PA
DGND
CNTR-N
CNTR-P/direction control
RxD/TxD-N (A)
RxD/TxD-P (B)
7
5
9
4
8
3
PA-N(-)
PA-P(+)
7
2
6
2
VP /+ 5 V
1
6
1
1RWH
$OOFDEOHVWRWKHFRQQHFWRUVRUWHUPLQDOEORFNVPXVWEH
VKLHOGHGDQGUHVWDJDLQVWWKHHQFORVXUHSRWHQWLDO
OXYMAT 61, 19“ unit, pin assignment of the AUTOCAL board and PROFIBUS connectors
Siemens AP 01 · 2015
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1
© Siemens AG 2015
Continuous Gas Analyzers, extractive
OXYMAT 61
1
19" rack unit
Gas and electrical connections
Sample gas outlet
Sample gas inlet
Reference gas inlet
4
2
15-pin connector:
Binary inputs and
analog inputs/outputs
9-pin
connector:
RS 485
Purging gas
inlet
1
9-pin interface
connector
(option):
e.g. PROFIBUS
Power supply
and fuses
25-pin connector:
Binary inputs and
relay outputs
Gas connections: stubs 6 mm or ¼"
OXYMAT 61, 19“ unit, gas and electrical connections
Documentation
Docume
Documentation
ntation
■ Selection and ordering data
Operating instructions
Article No.
OXYMAT 61
Gas analyzer for measurement of
oxygen
• German
A5E00123066
• English
A5E00123067
• French
A5E00123068
• Spanish
A5E00123069
• Italian
A5E00123070
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Siemens AP 01 · 2015
37-pin connector:
Binary inputs and
relay outputs (option)
© Siemens AG 2015
Continuous Gas Analyzers, extractive
OXYMAT 61
Suggestions for spare parts
■ Selection and ordering data
Description
Quantity for
2 years
Quantity for
5 years
Article No.
Reference gas supply (pump, restrictor, pressure switch, hose)
1
1
A5E00114838
O-ring
1
2
C74121-Z100-A6
Pressure switch (sample gas)
1
2
C79302-Z1210-A2
Flowmeter
1
2
C79402-Z560-T1
• Stainless steel, mat. no. 1.4571; non-flow-type compensation branch
-
1
C79451-A3277-B535
• O-ring (measuring head)
2
4
C79121-Z100-A32
• O ring (fitting)
2
4
C71121-Z100-A159
Measuring head (non-flow-type compensation branch)
1
1
C79451-A3460-B525
Restrictor for sample gas path, hose
2
2
C79451-A3480-C10
Reference gas path, 3000 hPa (set of parts)
1
1
C79451-A3480-D518
Front plate with keyboard
1
1
A5E00259978
Motherboard, with firmware: see spare parts list
-
1
Adapter plate, LCD/keyboard
1
1
C79451-A3474-B605
Magnetic field connection plate
-
1
C79451-A3474-B606
LC display
1
1
W75025-B5001-B1
Connector filter
-
1
W75041-E5602-K2
• 0.63 A/250 V (230 V version)
2
3
W79054-L1010-T630
• 1.0 A/250 V (110 V version)
2
3
W79054-L1011-T100
Analyzer unit
Sample chamber
Electronics
Fuse
If the OXYMAT 61 was supplied with a specially cleaned gas path for high oxygen context ("Clean for O2 service"), please ensure
that you specify this when ordering spare parts. This is the only way to guarantee that the gas path will continue to comply with the
special requirements for this version.
Siemens AP 01 · 2015
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