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General |
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Measurement ranges |
4, internally and externally switchable; automatic measuring range switchover also possible |
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Smallest possible span (relating to sample gas pressure 1 000 hPa absolute, 0.5 l/min sample gas flow, and 25 °C ambient temperature) |
0 ... 10 vpm O2 |
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Largest possible measuring span |
0 ... 100 % |
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Operating position |
Front wall vertical |
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Conformity |
CE mark in accordance with EN 50081-1, EN 50082-2 and RoHS |
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Design, enclosure |
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Degree of protection |
IP20 according to EN 60529 |
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Weight |
Approx. 11 kg |
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Electrical characteristics |
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EMC (ElectromagneticCompatibility) |
In accordance with standard requirements of NAMUR NE21 (08/98) and EN 61326 |
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Electrical safety |
In accordance with EN 61010-1, overvoltage category II |
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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 |
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Power consumption |
Approx. 37 VA |
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Fuse values |
100 ... 120 V: 1.0T/250 200 ... 240 V: 0.63T/250 |
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Gas inlet conditions |
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Sample gas flow |
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7.5 l/h |
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15 ... 30 l/h |
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Permissible sample gas pressure |
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2 000 hPa (abs.) |
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2 000 ... 6 000 hPa (abs.) |
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Sample gas temperature |
Min. 0 ... max. 50 °C, but above the dew point |
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Sample gas humidity |
< 1% relative humidity |
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Dynamic response |
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Warm-up period |
At room temperature < 30 min (the technical specification will be met after 2 hours) |
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Damping (electrical time constant) |
0 ... 100 s, parameterizable |
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Dead time (high-pressure version) (purging time of the gas path in the unit at 125 ml/min) |
10 ... 30 s |
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Dead time (low-pressure version without pump) |
< 5 s |
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Dead time (low-pressure version with pump) |
< 10 s |
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Time for device-internal signal processing |
< 1 s |
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Pressure correction range |
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Pressure sensor internal |
800 ... 1 100 hPa (abs.) |
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Measuring response(referred to sample gas pressure 1 013 hPa absolute, sample gas flow 7.5 l/min, and ambient temperature 25 °C) |
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Output signal fluctuation |
< ± 1% of the smallest possible measuring range according to rating plate, with electronic damping constant of 1 s |
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Zero point drift |
< ± 1 % of the current span/month |
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Measured-value drift |
< ± 1 % of the current span/month |
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Repeatability |
< 3% of the current measuring span |
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Detection limit |
1 % of current measuring range, < 0.1 vpm in measuring range 0 ... 10 vpm |
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Linearity error |
< 2% of the current measuring span |
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Influencing variables(relating to sample gas pressure 1 013 hPa absolute, 7.5 l/min sample gas flow and 25 °C ambient temperature) |
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Ambient temperature |
< 2%/10 K referred to current measuring span |
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Sample gas pressure only possible if the sample gas can flow out into the ambient air |
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Residual gases, deviation from zero point |
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Only gases with non-combustible residual gas components can be introduced |
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Residual gas concentration of 10 vpm H2; CO and CH4 have a lower cross-interference; higher HCs are negligible |
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Sample gas flow |
< 2 % of the smallest possible span with a change in flow of 10 ml/min |
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Power supply |
< 0.1 % of the current measuring range with rated voltage ± 10 % |
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Electrical inputs and outputs |
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Analog output |
0/2/4 ... 20 mA, 4 … 20 mA (NAMUR), isolated; max. load 750 |
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Relay outputs |
6, with changeover contacts, freely parameterizable, e.g. for measuring range identification; load: 24 V AC/DC/1 A, isolated |
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Analog inputs |
2, dimensioned for 0/2/4 … 20 mA for external pressure sensor and correction of influence of residual gas (correction of cross-interference) |
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Binary inputs |
6, designed for 24 V, isolated, freely parameterizable, e.g. for measurement range switchover |
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Serial interface |
RS 485 |
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Options |
AUTOCAL function each with 8 additional binary inputs and relay outputs, also with PROFIBUS PA or PROFIBUS DP |
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Climatic conditions |
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Permissible ambient temperature |
-40 ... +70 °C during storage and transportation, 5 … 45 °C during operation |
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Permissible humidity |
< 90% relative humidity as annual average, during storage and transportation (must not fall below dew point) |