M&C TechGroup PMA 50 EEX Datasheet

PMA 50 EEX

Embracing Challenge

Oxygen Analyser Series PMA®

Thermostated version PMA 50 EEX
in a wall mounting explosion-proof housing

SIL

DIN EN 61508

Special Features

Explosion proof according to ATEX and

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NEPSI for Zone 1

SIL approval according to DIN EN 61508

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Thermostated, in an explosion-proof



housing

Accurate and reliable, small space

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requirement

Analogue/Digital indicator

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Five linear measuring ranges

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Physical measuring principle

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Small stagnant volume, fast response

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time

Remote range indication and control

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Flow alarm sensor

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Status alarm, safety in operation

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Application

Due to the extremely fast response time
of the M&C magneto-dynamic measuring
cell with no stagnant volume as well as the
negligible cross sensitivity from other sample
gas components, the M&C oxygen analyser
PMA 50 EEX is a suitiable and reliable instru­ment for monitoring oxygen concentrations
in various gas analytical process control appli­cations.

Description

The M&C oxygen analyser PMA 50 EEX is a
temperature controlled instrument which has
been designed for continuous measurements
of oxygen concentrations in particle-free and
dry sample gas with a flow rate between 0-60
Nl/hr.

The PMA 50 EEX is a reliable and easy-to­operate instrument. It is built into an
explosion-proof EEX d e IIC T5 wallmount­ing housing with stainless steel tubing
and certified ventilate arrestors at sample gas
inlet and outlet. The transducer unit main­tains a constant operating temperature of 55
°C and a flashing LED on the control panel
indicates the proper operating temperature
of the analyser. The five measuring ranges
are displayed on the analogue meter with
30/100% scale and the 100% range on the
digital meter. The selected measuring range
is displayed on the front panel by LED’s. Two
output signals are available. The terminals
for the incoming power supply, two output
signals, remote range indication and control
and status alarm are located inside the EEX
e box. The sample gas enters the analyser via
a ventilate arrestor after it passed through an
external sample conditioning system with at
least a protective fine filter and flowmeter
with needle valve for adjusting the required
flow rate of the sample gas (also available
with M&C). After passing the M&C measur­ing cell and the flow sensor, the sample gas
leaves the instrument via the certified outlet
ventilate arrestor.

Measuring principle of M&C ox­ygen analyser

The PMA 50 EEX utilises the paramagnetic
principle of operation to measure oxygen
concentrations. The analyser measures the
paramagnetic susceptibility of the oxygen
in the sample gas by means of the M&C
magneto-dynamic measuring cell. The physi­cal propertys which distinguishes oxygen
from other gases is its paramagnetism. It is
significantly higher comparing to other com­mon gases. This operation principle is one of
the most accurate and reliable procedures to
determine the oxygen concentration in a gas
mixture from 0 to 100 Vol.%.

The robust M&C cross-flow cell has no
stagnant volume. Advantages are the fast
response time, the flow rate up to 60 l/hr,
the small volume of 2 ml, the extremely low
drift, the absolute linearity and the negligible
cross sensitivity against other sample gas
components. With a proper sample condi­tioning and pressure, the M&C cell will never
need replacing. The dumbbell with a small
mirror at its centre is mounted in a strong
inhomogenous magnetic field. The paramag­netic oxygen strengthens the forces on the
diamagnetic dumbbell and causes a shifting
which is detected by a system consisting of
light beam, mirror and a photo cell.

A compensation current is induced via the
feedback coil on the dumbbell and leads to
a reset of the dumbbell into its zero-position.

The required current is linearly proportional to
the oxygen concentration.

Technical specications and illustrations are without
obligation, subject to modications. 02.95/01.07

M&C TechGroup Germany GmbH • Rehhecke 79 • 40885 Ratingen • Germany
[e-mail] • www.mc-techgroup.com • Fon [phone] • Fax [phone]

13.7

Gas flow diagram PMA 50 EEX

1. External fine filter

2. External flowmeter with needle valve

3. Ventilate arrestor

4. Oxygen measuring cell PMA

5. Flow alarm sensor

(and at version #:with
pressure sensor)

Dimensions

1. Sample gas in/out with certified

ventilate arrestors

2. Cable glands 2x PG 13,5; 1x PG 16

3. Zero control

4. Measuring range select

5. Span control

6. Optional purging with certified venti-

late arrestors

1 2

3

5

4

FLA
(P)

3

Front view Side view

200

60

70

275

355
275

6

60

40

80

20

0

15

20

10

25

5

30

0

20.9

100

Dimensions in mm

130

O -Analyser

535

70

2

PMA 50 Ex

53 4

1

2

13.7

M&C TechGroup Germany GmbH • Rehhecke 79 • 40885 Ratingen • Germany
[e-mail] • www.mc-techgroup.com • Fon [phone] • Fax [phone]

Technical specications and illustrations are without
obligation, subject to modications. 02.95/01.07

Technical Data

Version PMA 50 EEX thermostated oxygen analyser in explosion-proof housing

Part No. 05A1000 :
05A2500 :

05A2505 :

Measuring ranges selectable for 0-1, 0-3, 0-10, 0-30 and 0-100 vol.% O2 linear and position EXTERNAL

External range indication externally: Potentialfree contact for all measuring ranges. Capacity 48V DC 200mA DC, Minimum contact rating

Remote range control Measuring ranges selectable via external potential free contacts 30V DC 3mA DC

Combined analogue/digital indicator analogue meter with a scale of 0-30 and 0-100% for each selected range

Output signals 0-10V DC, burden >100 KΩ for range 0-100 % isolated.

Response time for 90% FSD < 5 seconds at 60 Nl/hr air

Accuracy after calibration deviation: analogue signal output = ± 1% of span at range 3 - 100% / digital indicator = ±0,1 vol.% O

Reproducibility deviation: analogue signal output = < 1% of span / digital indicator = ±0,1 vol.% O

Influence of ambient temperature no influence up to 50 °C

Influence of barometric pressure The oxygen reading varies in direct proportion to changes of the barometric pressure

Influence of sample gas flow Variation in gas flow between 0-60 Nl/hr air will cause a difference of < 0,2 vol.% O

Sample gas inlet pressure 0,01-0,1 bar g standard or # in case of purging up to 0,5 bar g

Sample gas outlet pressure outlet of analyser must discharge freely into atmosphere

Flow rate of sample gas max. 60 Nl/hr (no flowmeter inside)

Temperature of sample gas -10 °C up to +50 °C dry gas

O2-transducer temperature fixed at +55 °C

Ambient-/ Storage temperature -10 °C up to +50 °C / -20 °C up to +60 °C, relative humidity 0-90% RH

Power supply internal power unit for 230VAC standard or 115VAC (a)* +/-10%, 40-60Hz, 35,5VA

Electrical connections terminals 2,5 mm2, 3x PG cable glands (mains supply, signals, range indication, remote ranging , status alarm)

Materials in contact with sample gas Platinum, Glass, Stainless Steel 316Ti, Epoxy resin, PTFE, PVDF

Sample gas connection

Flow alarm thermo-conductive flow sensor downstream mounted after measuring cell

Status alarm Change-over contact, switching capacity 250 V AC 2A AC, 48V DC 200mA DC minimum contact rating 50mW for

Protection / classification

Certificate No. KEMA 03 ATEX 2215X

Temperature cutoff at 72°C via thermal fuse, non-reversible

Housing / colour wall mounted explosion-proof housing / blue

Dimension / weight 475 (535) x 275 (355) x 200 mm / h x w x d / approx. 22 kg

Options Part-No. 05A9000: purging the enclosure via two certified ventilate arrestors, for pressures up to max. 1,5 bar abs.

* Please specify with order.

PMA 50 EEX, power supply 230V 40-60Hz, signal 0-1V and 0-20mA
PMA 50 EEX/P/PD-1-50, power 230V 40-60Hz, 0-1V / 0-20mA, pressure compensation 0,6 - 1,5 bar abs. with purging
the enclosure via two certified ventilate arrestors in the in- and outlet NPT1/4“i
PMA 50 EEX/P/PD, power 230V 40-60Hz, 0-1V / 0-20mA, pressure compensation 0,6 - 1,1 bar abs.
05A1000a / 05A2505a / 05A2505a = 115V 40-60Hz
(variations of +10% to -15% have no influence on the function of the analyser), 40-60Hz, 35,5VA, power supply via
EEx e connecting box, diameter of cable: 5mm - 9mm (PG13,5), 7mm - 12mm (PG16)

5V/1mA; internally : LED indication

digital meter 3

1

/

digit 9 mm high LCD-indicator for 0-100% O2 reading, selectivity 0,1vol.% O

2

2

0/4-20mA burden 270 Ω for every measuring range, electrically isolated; output voltage max. 15V (ex works).
Switchable max. burden 800 Ω, output voltage max. 30V.
Output current limiting adjustable 20mA-22mA (20,5mA ex works)

= ± 2% of span at range 1%

2

2

# no influence from 0,5-1,5 bar abs. at PMA 50 EEX/P/PD-1-50 with process pressure compensation

2

(PMA 50 EEX required admission pressure for competent flow rate, no pump inside)

or 0,6-1,5 bar abs. at version # PMA 50 EEX/P/PD-1-50 with process pressure compensation

1

/

" NPTi

4

temperature <+45°C / >+60°C, defect light beam, measuring cell not coupled, flow alarm <10 / >70Nl/h, power
supply error control, mains voltage breakdown

IP 54 EN 60529 / II2G EEX d e IIC T5 or II1/2G EEX d e [ia] IIC T5

and/or corrosive gases, connection

1

/

" NPTi, purge gas inlet pressure max. 100 mbar, flow rate 10-60 Nl/hr

4

Part-No. 05A9005: purging the enclosure via one certified ventilate arrestor, for pressure range > 1,1 bar - 1,5 bar abs.
and non-corrosive gases, connection

1

/

4

" NPTi
Part-No. 05A9015: Zero suppressing type SD-1/50 for PMA-50 pressurerange 0,5-1,5bar abs. Lowest range 97-100%
material: SS316, PVDF, Viton. mounted in the PMA-50Ex. Only in connection with PMA50EEx/P/PD-1/50.
Externally switchable via potential free contacts, 30V DC 3mA DC
Part-No. : Transmitter for measurements of gases from ex-zone 0 II 1/2 G Eex de [ia] IIC T5
Part-No. 90A0009: Measuring cell type PMC-1LB, solvent resistant.
Part-No. 90A0006: Measuring cell PMC-1G with glass solder. O-ring made of Chemraz

W A R N I N G ! I M P O R T A N T !

An external fine filter must always be used at the gas inlet of the analyser. Depending
on the composition of the sample gas, it may be necessary to use a sample conditio­ning system.

Technical specications and illustrations are without
obligation, subject to modications. 02.95/01.07

M&C TechGroup Germany GmbH • Rehhecke 79 • 40885 Ratingen • Germany
[e-mail] • www.mc-techgroup.com • Fon [phone] • Fax [phone]

13.7