General information | |
Measuring ranges | 4, internally and externally switchable; autoranging is also possible |
Smallest possible span (relating to sample gas pressure 1 000 hPa absolute, 0.5 l/min sample gas flow and 25 °C ambient temperature) | 2 vol.% or 5 vol.% O2 |
Largest possible measuring span | 100 vol.% O2 |
Measuring ranges with suppressed zero point | Any zero point within 0 ... 100 vol.% can be implemented, provided that a suitable reference gas is used |
Operating position | Front wall, vertical |
Conformity | CE mark in accordance with EN 50081-1 and EN 50082-2 |
Design, enclosure | |
Degree of protection | IP20 according to EN 60529 |
Weight | Approx. 13 kg |
Electrical characteristics | |
Auxiliary power | 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 |
Power consumption | Approx. 45 VA |
EMC (electromagnetic compatibility) | In accordance with standard requirements of NAMUR NE21 (08/98) |
Electrical safety | According to EN 61010-1, overvoltage category III |
Fuse values | 100 ... 120 V: 1.0 T/250 200 ... 240 V: 0.63 T/250 |
Gas inlet conditions | |
Permissible sample gas pressure | |
- External reference gas supply
| 800 … 1 200 hPa absolute |
| Atmospheric pressure ±50 hPa |
Sample gas flow | 18 … 60 l/h (0.3 … 1 l/min) |
Sample gas temperature | Min. 0 to max. 50 °C, but above the dew point |
Sample gas humidity | < 90% relative humidity |
Reference gas pressure (high-pressure version) | 2 000 to 4 000 hPa above sample gas pressure, but max. 5 000 hPa absolute (version without reference gas pump) |
Reference gas pressure (low-pressure version) with external pump | Min. 100 hPa above sample gas pressure |
Dynamic response | |
Warm-up period | At room temperature < 30 min (the technical specification will be met after 2 hours) |
Delayed display (T90) | 3.5 s |
Damping (electrical time constant) | 0 ... 100 s, configurable |
Dead time (purging time of the gas path in the unit at 1 l/min) | Approximately 0.5 ... 2.5 s, depending on version |
Time for device-internal signal processing | < 1 s |
Pressure correction range | |
Pressure sensor internal | 500 … 2 000 hPa, absolute (see gas inlet conditions for permissible sample gas pressure) |
Measuring response | Based on sample gas pressure 1 013 hPa absolute, 0.5 l/min sample gas flow and 25 °C ambient temperature |
Output signal fluctuation | < ± 0.75% of the smallest possible measuring range according to rating plate, with electronic damping constant of 1 s (corresponds to ±0.25% at 2 ?) |
Zero point drift | < ± 0.5%/month of the smallest possible span according to rating plate |
Measured-value drift | < ±0.5%/month of the current measuring range |
Repeatability | < 1% of the current measuring range |
Detection limit | 1% of the current measuring range |
Linearity error | < 1% of the current measuring range |
Influencing variables | Based on sample gas pressure 1 013 hPa absolute, 0.5 l/min sample gas flow and 25 °C ambient temperature |
Ambient temperature | < 1% of the current measuring range/10 K Zero offset: < 0.1 vol.% O2 absolute/10 K |
Sample gas pressure (with air (100 hPa) as internal reference gas supply, correction of the atmospheric pressure fluctuations is only possible if the sample gas can vent to ambient air.) | - With disabled pressure compensation: < 2% of the current measuring range /1% pressure change
- With enabled pressure compensation: < 0.2% of the current measuring range /1% pressure change
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Accompanying gases | Deviation from zero point corresponding to paramagnetic or diamagnetic deviation of accompanying gas (see table) |
Sample gas flow at zero point | < 1% of the current measuring range according to rating plate with a change in flow of 0.1 l/min within the permissible flow range |
Auxiliary power | < 0.1% of the current measuring range with rated voltage ± 10% |
Electrical inputs and outputs | |
Analog output | 0/2/4 … 20 mA, floating; max. load 750 ? |
Relay outputs | 6, with changeover contacts, freely configurable, e.g. for measuring range identification; load: 24 V AC/DC/1 A, floating |
Analog inputs | 2, dimensioned for 0/2/4 … 20 mA for external pressure sensor and accompanying gas influence correction (correction of cross-interference) |
Digital inputs | 6, designed for 24 V, floating, freely configurable, e.g. for measuring range switchover |
Serial interface | RS 485 |
Options | AUTOCAL function each with 8 additional digital inputs and relay outputs, also with PROFIBUS PA or PROFIBUS DP |
Climatic conditions | |
Permissible ambient temperature | -30 … +70 °C during storage and transportation 5 … 45 °C during operation |
Permissible humidity | < 90% relative humidity as annual average, during storage and transportation (must not fall below dew point) |