General (based on EN 61207/IEC 1207. All data refers to the binary mixture H2 in N2)
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Measuring ranges
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4, internally and externally switchable; automatic measuring range switchover also possible
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Largest possible measuring span
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100 vol.% H2 (for smallest measuring span, see "Function")
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Measuring ranges with suppressed zero point
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Any zero point within 0 ... 100 vol.% can be implemented, smallest possible measuring span: 5 % H2
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Operating position
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Front wall, vertical
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Conformity
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CE mark in accordance with EN 61326/A1 and EN 61010/1
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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. 10 kg
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Electrical characteristics
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EMC (Electromagnetic Compatibility) (All signal lines must be shielded. Measured value deviations of up to 4 % of the smallest measuring range may occur in ranges with strong electromagnetic interference.)
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In accordance with standard requirements of NAMUR NE21 (08/98)
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Electrical safety
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In accordance with EN 61010-1; overvoltage category II
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Auxiliary power (see nameplate)
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100 V -10% ... 120 V +10% AC, 48 ... 63 Hz or 200 V -10% ... 240 V +10% AC, 48 ... 63 Hz
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Power consumption
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Approx. 20 VA
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Fuse values
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100 ... 120 V: 1.0T/250 200 ... 240 V: 0.63 T/250
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Gas inlet conditions
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Sample gas pressure
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800 ... 1 100 hPa (absolute)
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Sample gas flow
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30 ... 90 l/h (0.5 ... 1.5 l/min)
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Sample gas temperature
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Min. 0 to max. 50 °C, but above the dew point
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Temperature of the measuring cell
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Approx. 60 ?C
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Sample gas humidity
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< 90% relative humidity
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Dynamic response
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Warm-up period
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< 30 min (the technical specification will be met after 2 hours)
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Delayed display (T90)
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< 5 s
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Damping (electrical time constant)
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0 ... 100 s, parameterizable
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Dead time (purging time of the gas path in the unit at 1 l/min)
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Approx. 0.5 s
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Measuring response (relating to sample gas pressure 1 013 hPa absolute, 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 the smallest possible measuring range according to rating plate, with electronic damping constant of 1 s (? = 0.25%)
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Zero point drift
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< ± 1 %/week of the smallest possible measuring span according to rating plate
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Measured-value drift
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< ± 1 %/week of the smallest possible measuring span according to rating plate
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Repeatability
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< 1 % of the current measuring range
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Detection limit
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1 % of the current measuring range
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Linearity error
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< ± 1 % of the current measuring range
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Influencing variable (relating to sample gas pressure 1 013 hPa absolute, 0.5 l/min sample gas flow and 25 °C ambient temperature)
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Ambient temperature
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< 1%/10 K referred to smallest possible measuring span according to rating plate
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Accompanying gases
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Deviation from zero point (for influence of interfering gas see paragraph titled "Interference influences")
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Sample gas flow
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< 0.2 % of the smallest possible span according to rating plate with a change in flow of 0.1 l/min within the permissible flow range
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Sample gas pressure
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< 1 % of the current measuring range with a pressure change of 100 hPa
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Auxiliary power
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< 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
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0/2/4 ... 20 mA, isolated; load max. 750 ?
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Relay outputs
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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
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2, dimensioned for 0/2/4 … 20 mA for external pressure sensor and correction of cross-interference
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Binary inputs
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6, designed for 24 V, isolated, freely parameterizable, e.g. for measurement range switchover
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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 additional binary inputs and relay outputs each, also with PROFIBUS PA or PROFIBUS DP
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Climatic conditions
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Permissible ambient temperature
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-30 … +70 °C during storage and transportation, 5 … 45 °C during operation
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Permissible humidity (dew point must not be fallen below)
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< 90% relative humidity as annual average, during storage and transportation
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