General
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Measuring ranges
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4, switchable internally and externally; autoranging is also possible
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Smallest possible measuring span (referred to 1000 hPa absolute sample gas pressure, 0.5 l/min sample gas flow and 25 °C ambient temperature)
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2% v/v or 5% v/v O2
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Largest possible measuring span
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100 % v/v O2
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Measuring ranges with suppressed zero
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Any zero point is possible between 0 and 100 % v/v as long as a suitable reference gas is used
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Position of use
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Front panel vertical
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Conformity
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CE identification EN 50081-1, EN 50082-2
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Design, enclosure
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Degree of protection
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IP20 according to EN 60529
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Weight
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Approx. 13 kg
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Electrical characteristics
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Power supply (see rating plate)
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100 to 120 V AC (rated range 90 V to 132 V), 48 to 63 Hz or
200 to 240 V AC (rated range 180 V to 264 V), 48 to 63 Hz
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Power consumption
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Approx. 37 VA
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EMC interference immunity (ElectroMagnetic Compatibility)
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According to standard requirements of NAMUR NE21 (08/98)
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Electrical safety
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According to EN 61010-1, overvoltage category III
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Fuses
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100...120 V: 1.0T/250, 200...240 V: 0.63T/250
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Gas inlet conditions
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Permissible sample gas pressure
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- External reference gas supply
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800 … 1200 hPa
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atmospheric pressure ± 50 hPa
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Sample gas flow
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18 … 60 l/h (0.3 … 1 l/min)
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Sample gas temperature
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0 … 50 ?C
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Sample gas humidity
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< 90% relative humidity
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Time response
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Warm-up period
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With ambient temperature < 30 min
(maximum accuracy achieved after 2 hours)
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Response time (T90)
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3.5 s
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Damping (electric time constant)
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0 to 100 s, programmable
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Dead time (purging time of gas path in analyzer at 1 l/min)
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Approx. 0.5 to 2.5 s, depending on version
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Time for internal signal processing
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< 1 s
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Pressure correction range
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Pressure sensor, internal
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500 … 2000 hPa absolute (permitted sample gas pressure see gas inlet conditions)
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Measuring response (referred to 1000 hPa absolute sample gas pressure, 0.5 l/min sample gas flow and 25 °C ambient temperature)
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Output signal fluctuation
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< 0.75% of smallest possible measuring range specified on rating plate with an electronic time constant of 1 s (corresponds to ± 0.25% with 2?)
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Zero drift
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< 0.5%/month of smallest possible measuring span specified on rating plate
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Measured-value drift
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< 0.5%/month of respective measuring span
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Repeatability
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< 1% of respective measuring span
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Minimum detectable quantity
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1% of current measuring range
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Linearity error
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< 1% of respective measuring span
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Influencing variables (referred to 1000 hPa absolute sample gas pressure, 0.5 l/min sample gas flow and 25 °C ambient temperature)
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Ambient temperature
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< 0.1% [% O2] /1 K referred to the smallest possible measuring span according to rating plate
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Sample gas pressure (with air (approx. 100 hPa) as reference gas, a correction of the atmospheric pressure fluctuations is only possible when the sample gas is vented to ambient air)
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Without pressure compensation:
< 2% of measuring span/1% change in pressure;
with pressure compensation:
< 0.2% of measuring span/1% change in pressure
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Residual gases
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Deviation in zero point corresponding to paramagnetic or diamagnetic deviation of residual gas (see table)
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Sample gas flow
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< 1% of smallest possible measuring span according to rating plate with a change in flow of 0.1 l/min within the permissible flow range
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Power supply
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< 0.1% of output signal span with rated voltage ± 10%
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Electric inputs and outputs
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Analog output
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0/2/4 … 20 mA, floating; max. load 750 ?
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Relay outputs
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6, with changeover contacts, freely selectable, e.g. for range identification; loading capacity: 24 V AC/DC/ 1 A, floating
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Analog inputs
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2, designed for 0/2/4 to 20 mA, for external pressure sensor and correction of influence of residual gas (correction of cross interference)
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Binary inputs
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6, designed for 24 V, floating, freely-selectable, e.g. for range switching
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Serial interface
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RS 485
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Options
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Autocal function with 8 binary inputs and 8 relay outputs; also with PROFIBUS PA or PROFIBUS DP
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Ambient conditions
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Perm. ambient temperature
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-30 … +70 °C during storage and transport,
+5 … +45 ?C during operation
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Permissible humidity
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< 90% relative humidity as annual average, during storage and transport (dew point must not be fallen below)
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