M&C PMA Series User manual

Oxygen Analyzer Series PMA
®
PMA 50 EX
(Effective from: March 2018,
Serial No. 1803436)
Instruction Manual
Version 1.01.04

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Dear customer,
Thank you for buying our product. In this instruction manual you will find all necessary information about this
M&C product. The information in the instruction manual is fast and easy to find, so you can start using your M&C
product right after you have read the manual.
If you have any question regarding the product or the application, please don’t hesitate to contact M&C or your
M&C authorized distributor. You will find all the addresses in the appendix of this manual.
For additional information about our products and our company, please go to M&C’s website www.mc-
techgroup.com. There you will find the data sheets and manuals of our products in German and English.
T
his instruction manual does not claim completeness and may be subject
to technical modifications.
© 04/2022 M&C TechGroup Germany GmbH. Reproduction of this document or
its content is not allowed without permission from M&C.
PMA
®
is a registered trade mark.
T
he German instruction manual is the original instruction manual.
Version: 1.01.04

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List of Contents
1General information ............................................................................................................................. 5
2Declaration of conformity.................................................................................................................... 5
3Electrical standards............................................................................................................................... 6
4Safety instructions ................................................................................................................................ 6
4.1 Proper Use ....................................................................................................................................................................................7
5Information and safety instructions for using the Analyzer in hazardous areas ......................... 7
5.1 Analyzing gases from Ex zone II 1G Ex IIC T4.....................................................................................................7
6Warranty ................................................................................................................................................. 8
7Used terms and signal indications...................................................................................................... 8
8Introduction ......................................................................................................................................... 10
8.1 Serial number...........................................................................................................................................................................10
8.2 Power supply............................................................................................................................................................................10
9Application........................................................................................................................................... 10
10 Technical Data ..................................................................................................................................... 11
10.1 Options........................................................................................................................................................................................12
11 Description........................................................................................................................................... 13
11.1 PMA 50 Ex/P/PD-1-50 with pressure compensation and enclosure purging (without SIL-
certification)..............................................................................................................................................................................14
11.2 PMA 50 Ex/P/PD with pressure compensation (without SIL-certification) ................................................15
11.3 Option zero suppression (without SIL-certification).............................................................................................15
11.4 Option enclosure purging or enclosure ventilation .............................................................................................15
12 Measuring principle ............................................................................................................................ 15
13 Gas flow diagram................................................................................................................................. 17
14 Receipt of goods.................................................................................................................................. 19
15 Installation ........................................................................................................................................... 19
16 Supply connections............................................................................................................................. 20
16.1 Sample gas inlet and sample gas outlet.....................................................................................................................20
16.2 Option purging enclosure or enclosure ventilation .............................................................................................21
16.3 Electrical connection............................................................................................................................................................22
17 Starting up ........................................................................................................................................... 23
18 Calibration............................................................................................................................................ 23
18.1 Zero calibration.......................................................................................................................................................................24
18.2 Full scale value calibration.................................................................................................................................................25
19 Measuring............................................................................................................................................. 27
20 Cross sensitivities................................................................................................................................ 28
21 Closing down ....................................................................................................................................... 31
22 Storage and Transport........................................................................................................................ 31
23 Maintenance ........................................................................................................................................ 31
23.1 Removal of the measuring cell........................................................................................................................................33
23.2 Mechanical zero point adjustment................................................................................................................................36
24 Proper disposal of the device ............................................................................................................ 37
25 Spare parts list ..................................................................................................................................... 37
26 Appendix .............................................................................................................................................. 38

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List of Illustrations
Figure 1 PMA50 EX oxygen analyzer .........................................................................................................................................13
Figure 2 Drawing of the measuring cell and optical signal processing...................................................................16
Figure 3 Gas flow diagram .............................................................................................................................................................17
Figure 4 Gas conditioning ..............................................................................................................................................................18
Figure 5 Dimensions for installation..........................................................................................................................................19
Figure 6 Electrical connection inside the connection box of the PMA50 EX........................................................22
Figure 7 Drawing of the internal analyzer design...............................................................................................................33
Figure 8 Transmitter unit ...................................................................................................................................................................35
Figure 9 Transmitter unit for mechanical zero point adjustment...............................................................................36
Figure 10 Circuit diagram front board PMA50 EX .................................................................................................................41
Figure 11 Assembly front board PMA50 EX..............................................................................................................................42
Figure 12 Circuit diagram mains adapter PMA50 EX ...........................................................................................................43
Figure 13 Assembly/connection mains adapter PMA50 EX .............................................................................................44
Figure 14 Cut-out magnification front board for adjustment of temperature alarm (TP10, P19) (TP11:
current temperature) und flow alarm threshold (P20)....................................................................................45
Figure 15 Cut-out magnification front board couple sensor bridge for application of a transmitter
without couple sensor....................................................................................................................................................45
Figure 16 Cut-out magnification front board for adjustment of reference voltage , amplification and
offset of the O2-signal .....................................................................................................................................................46
Figure 17 Cut-out magnification mains adapter for adjustment of the temperature, current and
voltage output....................................................................................................................................................................47
Figure 18 Cut-out magnification mains adapter for adjustment of burden and limitation of the
current output ....................................................................................................................................................................47

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Head Office
M&C TechGroup Germany GmbH Rehhecke 79 40885 Ratingen Germany
Telephone: 02102 / 935 - 0
Fax: 02102 / 935 - 111
E - mail: [email protected]
www.mc-techgroup.com
1 GENERAL INFORMATION
The product described in this instruction manual has been examined before delivery and left our works in
perfect condition related to safety regulations. In order to keep this condition and to guarantee a safe oper-
ation, it is important to heed the notes and prescriptions made in this instruction manual. Furthermore, at-
tention must be paid to appropriate transportation, correct storage, as well as professional installation and
maintenance work.
All necessary information a skilled staff will need for appropriate use of this product are given in this instruc-
tion manual.
2 DECLARATION OF CONFORMITY
CE - Certification
The product described in this instruction manual complies with the following EU directives:
ATEX-Directive
The product described in this manual is produced in accordance with the EU directive for devices and protection
systems for appropriate use in hazardous areas 2014/34/EU appendix II.
RoHS Directive
The requirements of the RoHS2 (‘Restriction of Hazardous Substances 2’) directive 2011/65/EU and its an-
nexes are met.
EMV-Instruction
The requirements of the EU directive 2014/30/EU “Electromagnetic compatibility“ are met.
Low Voltage Directive
The requirement of the EU directive 2014/35/EU “Low Voltage Directive“ are met.
The compliance with this EU directive has been examined according to DIN EN 61010.
Declaration of conformity
The EU Declaration of conformity can be downloaded from the M&C homepage or directly requested from M&C.
The SIL –declaration of conformity can be requested directly at M&C.

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3 ELECTRICAL STANDARDS
The electrical standard of electrical equipment corresponds to the safety regulations concerning the EN61010
and to the safety requirements of the European standards:
EN 61010
EN 61508
EN 60079-0:2012+A11:2013
EN 60079-1:2014
EN 60079-7:2015
for operation of the equipment in hazardous areas group II category 2. Attention must be paid to the Certifi-
cate of Conformity IBExU 16 ATEX 1192 (see appendix).
4 SAFETY INSTRUCTIONS
Note the following basic safety procedures when using this equipment:
Read these operating instructions carefully before start-up and use of the equipment! The infor-
mation and warnings given in these operating instructions must be heeded.
Attention must be paid to the requirements of the certificate of conformity (see appendix): IBExU 16
ATEX 1192.
Work on electrical equipment is only to be carried out by trained specialists as per the regulations
currently in force.
Attention must be paid to the requirements of VDE 0100 when setting high-power electrical units
with nominal voltages of up to 1000 V, together with the associated standards and stipulations.
For use in hazardous area observe the relevant national and international instructions and regula-
tions.
Check the details on the type plate to ensure that the equipment is connected up to the correct
mains voltage.
Protection against touching dangerously high electrical voltages. Before opening the equipment, it
must be switched and hold no voltages. This also applies to any external control circuits that are
connected.
The equipment is only to be set within the permitted range of temperatures and pressures.
Check that the location is weather-protected. It should not be subjected to either direct sun, rain or
moisture.
Installation, maintenance, monitoring and any repairs may only be done by authorised personnel
with respect to the relevant stipulations.

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4.1 PROPER USE
The oxygen analyzer PMA50 EX is suitable for analyzing gas mixtures classified in Zone 1 with an oxygen
content of up to 21% by volume. The PMA50 EX is suitable for the continuous measurement of oxygen in
particle-free and dry sample gases with a maximum dew point of 5 °C [41 °F].
Only install and operate the analyzer under the operating parameters and conditions described in chapter 5
“Information and safety instructions for using the Analyzer in hazardous areas” and chapter 10 “Technical
Data” of this instruction manual.
Refrain from all uses other than for this purpose. Improper use can lead to serious injuries, for more details
see the safety instructions at the appropriate place.
5 INFORMATION AND SAFETY INSTRUCTIONS FOR USING THE ANALYZER
IN HAZARDOUS AREAS
The Oxygen Analyzer PMA 50 Ex is suitable for use in hazardous area group II category 2.
The explosion proof protection is:
II 2G Ex d b eb IIC T4 Gb IBExU 16 ATEX 1192 , IECEx IBE 16.0041
The oxygen analyzer PMA50 EX is suitable for analyzing gas mixtures classified in Zone 1 with an oxygen content
of up to 21% by volume.
Higher oxygen concentrations are not covered by the ATEX directive.
The analyzer has been certified through IBExU, authorized company for official approval of electric equipment in
the Netherlands. Detailed information and a copy of the certificate are attached to this instruction manual.
Installation and operation of the analyzer has to be done corresponding to the conditions in the Ex-certificate (see
appendix). Only in this case, the reliability of operation in hazardous area can be guaranteed.
All changes of the standard analyzer with parts which are not specified or approved by M&C as well as repair and
service with not specified parts mean a loss of the Ex-certificate.
In case of doubt, please turn directly to M&C respectively to your M&C franchised dealer.
5.1 ANALYZING GASES FROM EX ZONE II 1G EX IIC T4
T wo protective devices must always be used for category 1G.
In both, the measuring gas inlet and outlet of the analyzer PMA50 EX, a M&C breathing and draining device
MC95A EX II 2G Ex db IIC Gb is mounted.
When using explosive gas mixtures, which require zone 0, a suitable protection system must be provided in both
the inlet and outlet against flame flashback.
The entire body has to be made of stainless steel.
Alternatively, other suitable protective devices against flame flashback can be used.

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6 WARRANTY
If the equipment fails, please contact M&C directly or else go through your M&C authorised dealer.
We offer a one year warranty as of the day of delivery as per our normal terms and conditions of sale, and
assuming technically correct operation of the unit. Consumables are hereby excluded. The terms of the war-
ranty cover repair at the factory at no cost or the replacement at no cost of the equipment free ex user
location.
Reshipments must be sent in a sufficient and proper protective packaging.
7 USED TERMS AND SIGNAL INDICATIONS
Danger
This means that death, severe physical injuries and/or important material dam-
ages will occur in case the respective safety measures are not fulfilled.
Warning
This means that death, severe physical injuries and/or important material
damages may occur in case the respective safety measures are not fulfilled.
Caution
This means that minor physical injuries may occur in case the respective
safety measures are not fulfilled.
Caution Without the warning triangle means that a material damage may occur in
case the respective safety measures are not met.
Attention This means that an unintentional situation or an unintentional status may oc-
cur in case the respective note is not respected.
Note
These are important information about the product or parts of the instruction
manual which require user’s attention.
Qualified personnel ‘Qualified personnel’ are experts who are familiar with the installation, com-
missioning, maintenance, and operation of these types of products. The fol-
lowing knowledge is at least required for the work:
Instructed person in EX-protection
Trained person in the electrotechnical field
Detailed knowledge of the manual and the applicable safety regulations
‘Ex‘ indicates important information about the product or about the corre-
sponding parts in the instruction manual, relating to usage in potentially ex-
plosive atmospheres.

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High voltages!
Protect yourself and others against damages which might be caused by
high voltages.
Corrosive!
These substances destroy living tissue and equipment upon contact.
Do not breathe vapors; avoid contact with skin and eyes.
Hot surface!
Contact may cause burn! Do not touch!
Wear protective gloves!
Working with chemicals, sharp objects or extremely high temperatures re-
quires wearing protective gloves.
Wear safety glasses!
Protect your eyes while working with chemicals or sharp objects. Wear
safety glasses to avoid getting something in your eyes.
Wear protective clothes!
Working with chemicals, sharp objects or extremely high temperatures re-
quires wearing protective clothes.

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8 INTRODUCTION
8.1 SERIAL NUMBER
The type plate with the serial number is fixed on the left side of the analyzer’s housing.
Please indicate always this serial number in case of questions or when purchasing spare parts.
8.2 POWER SUPPLY
The internal power supply of the oxygen analyzer PMA50 EX is 115 V or 230 V AC, 40 - 60 Hz. Detailed infor-
mation can be found on the type plates. Variations of the power supply of -15 % to +10 % do not effect the
function of the analyzer.
9 APPLICATION
The Oxygen Analyzer PMA 50 EX is suitable for the continuous measurement of oxygen in particle-free and
dry sample gases with a maximum dew point of 5 °C [41 °F].
The features of the analyzer are safe operation, accuracy and low maintenance.
The measurement is based on the physical principle of the paramagnetic oxygen measuring cell and is one
of the most exact quantitative methods of oxygen determination within the range of 0-100 vol% oxygen.
There is a direct flow against the measuring cell which has got a low volume of only 2 ml (small stagnant
volume). Further characteristics are robustness, extremely small drift, fast response time (T90 < 5 sec.) and
negligible cross sensitivities to other sample gas components.
Fluctuations of the flow rate in a range from 0 Nl/h to 60 Nl/h air cause a change of the oxygen reading which
is smaller than 0.2 vol% O2.
Measurements in flue gas and in inerting plants are among many other measurement tasks which are typical
applications for the PMA 50 EX.