PM 2000+ The paramagnetic oxygen analyzer in range from 0,1% up to 100% - precise and maintenance-free
Brief description
The PM 2000+ is a precise oxygen analyser for continuous monitoring purposes at an amazing price. Build in a modular housing system, with a modern micro-controller technology, it is specially designed for process and ambient air measurements. The analyser is equipped with an auto-calibration functionality and a self-diagnosis capability and has an RS232 interface. With the programmable auto calibration function it is capable to fulfil a fully automatic calibration by means of the integrated relays. The measuring unit is thermostat temperature controlled to 55°C. The operation and parameterisation is carried out by means of a user friendly 4 keys and a 16-digit LCD display and also through RS232 interface
Measuring principle
The measurement is based on the paramagnetic characteristic of oxygen. It generates a partial pressure within a strong and non-homogeneous magnetic field which moves a rotatable glass dumbbell within the measuring cell. This small rotation is measured by the projection of a light source on a photodiode via a small mirror on the dumbbell. A small current through a wire around the dumbbell forces the dumbbell to its initial position. This current is amplified and is directly proportional the oxygen concentration.
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PM 2000+
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PM 2100+ 1/2 19” portable model optional with filter on the rear. WxHxD: 235 x 155 x 280 mm IP protection class: 52 |
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PM 2200+ wall-mounted housing Rittal, Single or multiple channel versions. WxHxD: 380 x 410 x 210 mm IP protection class: 52 |
Specifications |
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Measurement range output |
free settable by input of parameters between 0- 100% O2 |
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Measurement range |
Standard range 0-25%, 0-100%, others on request |
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Measurement signal |
4-20mA or 0-20mA (max. apparent ohmic resistance 500 Ohm) |
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Status output |
2 alarm relays, 1 malfunction relay |
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Output connection |
pump relay, maintenance sample gas relay, zero gas relay, test gas relay for the autocalibration |
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Display |
LCD digital multifunction display, indication of measured value: 100.0 %O2; Flow 99l/h, alarms, malfunction, parameters, total 16 digits |
Options |
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· pressure compensation (electronic or backpressure regulator) · test gas pump · sample gas filter · external flow display (rotameter) · flow sensor with alarm setting · NDIR sensors for CO2, CH4 and CO |
Design |
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Materials of gas conducting parts |
PVDF, glass, steel 1.4571, gold, viton, platinum-iridium, epoxy resin, nickel |
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Gas connections |
PVDF bulkhead connection, for hose with inside ø 4mm |
Power supply |
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Voltage |
100 - 240VAC 50/60Hz |
Operating conditions |
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Flow |
10-90 l/h |
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Gas conditioning |
necessary for humid and/or corrosive gases, pre-filter required |
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Operating gas pressure |
10-1000 hPa (0.01-1bar) |
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Operating temperature |
5-45°C |
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Calibration |
2-point calibration: with gases as desired, menu-controlled, time controlled. fully automatic AUTOCAL or semiautomatic calibration |
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Storage and transport temperature |
-25°C to +65°C |
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Relative humidity |
0-75% RH |
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Background gas influence |
slight (for guideline data see operating instructions) |
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Measuring details |
PM 2000+ |
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Detection limit |
0,01 % O2 |
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Repeatability |
<= ± 0,03 % O2 (time base for gas switch >= 5 min) |
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Zero point drift |
<= ± 0,1 % O2 / week (offset) may be higher during the first days after putting into operation or after longer period of storage or transport |
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Temperature influence at zero |
< ± 0,05 % O2 /°C |
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Temperature influence span |
< ± 0,20 % of measured value / °C |
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Pressure influence on zero |
no influence |
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Pressure influence span |
1% air pressure change causes 1% change in reading without backpressure regulator (option) or pressure compensation (option) |
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Flow error |
<= 0,1 Vol.-% O2 within 10…90 l/h with the in-build flow regulator (option) |
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T90-time |
<= 6s at 90 l/h and gas change from nitrogen to air |