SIL rated oxygen measurement for % oxygen levels
PMA30
SIL rated
temperature controlled
flow alarm
Oxygen measurement in a 19" cassette.
The PMA30 provides fast, accurate and reliable oxygen measurement in a 19" cassette.
It has a SIL rating according EN61508 and includes an integral flow alarm.
The PMA30 can be ordered in two configurations:
- PMA30A/D has a combined analogue/digital meter
- PMA30/D has only a digital meter
Paramagnetism is significantly higher for oxygen than other common gases. The M&C magneto-dynamic measurement cell uses this physical phenomenon to provide the most accurate and reliable measurements available.
The small (2 ml) flow cell houses a robust sensor that can have a flow rate of up to 1 l/min. The small cell design improves speed of response and the paramagnetic sensor measures oxygen concentrations with a response time of less than 3 seconds.
The analyser is able to have 5 selectable ranges:
- 0 to 1%
- 0 to 3%
- 0 to 10%
- 0 to 30%
- and 0 to 100%
This allows this system to be used for trace level oxygen measurements as well as oxygen purity applications.
GENERAL |
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Measurement |
Oxygen |
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Configuration |
On-line |
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Measuring range |
Selectable for 0 to 1, 0 to 3, 0 to 30, 0 to 10, 0 to 30, and 0 to 100 vol% O2, linear. |
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Expanded measuring ranges |
Optional. Zero suppression for spreading of measuring range, adjusted by the standard ranges, for example 20 to 21 % (1 %), 18 to 21 % (3 %), 90 to 100 % (10 %), max. 97 to 100 %, incl. process pressure compensation type SDPD |
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External measuring range indication |
Potential free contacts for each selected range, contact rating max. 48 VDC, 0.5 A |
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Remote range control |
For all 5 ranges by means of external potential free contacts |
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Response time for 90 % FSD |
< 3 seconds at 60 Nl/hr air |
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Accuracy after calibration |
Deviation: analogue = ±1 % of span at range 3 to 100 % / digital indicator = 0.1 vol.% O2. ±2 % of span at range 1 % |
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Reproducibility |
Deviation: analogue = <1 % of span / digital = ±0.1 vol.% O2 |
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Influence of ambient temperature |
No influence up to +45 °C |
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Influence of barometric pressure |
The oxygen reading varies in direct proportion to changes of the barometric pressure |
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Influence of sample gas flow |
Variation of gas flow between 0 to 60 Nl/hr air will cause a difference of < 0.1 vol.% O2 |
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Sample gas inlet pressure |
0.01 up to 1 bar g, (PMA 30 required admission pressure for competent flow rate, no pump inside) |
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Sample gas outlet pressure |
Outlet of analyser must discharge freely into atmosphere. option: process pressure compensation PD in range of 0.4 to 1.6 bar absolute |
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Flow rate of sample gas |
Max. 60 Nl/hr air, adjustable with needle valve on the flowmeter 7 to 70 Nl/hr |
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Temperature of sample gas |
-10 to +40 °C, dry gas |
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O2 transducer temperature |
Fixed at +50 °C |
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Ambient temperature |
-10 to +45 °C |
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Storage temperature |
-20 to +60 °C, relative humidity 0 to 90 %rh |
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Certification |
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European |
CE marked |
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IP protection |
IP 20 EN 60529 |
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Electrical standard |
EN 61010 |
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Shipping |
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Shipping weight |
2.5 Kg |
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MECHANICAL |
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Dimension |
3U H x 28HP W x 230 mm L + approx. 60 mm installation space |
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Enclosure |
3U/28HP - 19-inch cassette European standard, silver |
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Wetted materials |
Platinum, Glass, Polypropylene, 316Ti Stainless Steel, FPM, Epoxy resin |
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ELECTRICAL / UTILITIES |
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Power |
Internal power unit 230 VAC standard, 115 VAC available ±15 %, 40 to 60 Hz. 35.5 VA |
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Connections |
Mains: 3-pole chassis plug. signal: 9 and 25-pole plug |
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Cable length |
2 m for mains supply |
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Sample gas connection |
1/8 " NPT i, optional hose connector DN 4/6 available |
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Outputs |
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Output signal |
0 to 10 VDC, non-isolated, load > 100 KΩ, for the range of 100 vol.%, and 0 to 20 mA or 4 to 20 mA for the chosen range, non-isolated, max load 300 Ω/900 Ω |
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Analogue/Digital indication |
Analogue: selectable for each range with a scale of 0 to 30 and 0 to 100 %. Digital: 3 ½ digit 9 mm high LCD for 0 to 100 % O2 reading, selectivity 0.1 vol.% O2 |
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All specifications subject to change |
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