19" rack unit производства Siemens

General (based on DIN EN 61207/IEC 1207. All data refers to the binary gas mixture H₂ in N₂)

Measuring ranges

4, internally and externally switchable; automatic measuring range switchover also possible

Span

Application-dependent (see ordering data)

Measuring ranges with suppressed zero point

Application-dependent (see ordering data)

Operating position

Front wall, vertical

Conformity

CE marking in accordance with EN 50081-1/EN 50081-2 and RoHS

Design, enclosure

Degree of protection

IP20 according to EN 60529

Weight

Approx. 13 kg

Electrical characteristics

EMC (Electromagnetic Compatibility)

In accordance with standard requirements of NAMUR NE21 (08/98) and EN 61326

Electrical safety

In accordance with EN 61010-1; overvoltage category II

Power supply (see nameplate)

100 V AC -10 % ... 120 V AC +10 %, 47 ... 63 Hz

or

200 V AC -10 % ... 240 V AC +10 %, 47 ... 63 Hz

Power consumption

Approx. 30 VA

Fuse values

100 ... 120 V: 1.0T/250

200 ... 240 V: 0.63T/250

Gas inlet conditions

Sample gas pressure

800 ... 1 100 hPa (absolute)

Sample gas flow

30 ... 90 l/h

Sample gas temperature

Min. 0 to max. 50 °C, but above the dew point

Temperature of the measuring cell

70 ºC

Dynamic response (the dynamic and measuring response refers to the measurement of H₂ in N₂)

Warm-up period

< 30 min at room temperature (the technical specification will be met after 2 hours)

Delayed display (T₉₀)

Approx. 35 s (including dead time)

Damping (electrical time constant)

0 ... 100 s, parameterizable

Dead time (the diffusion to the probes is the determining variable)

Approx. 34 s

Dead time (special application)

< 10 s

Measuring response(the dynamic and measuring response refers to the measurement of H₂ in N₂) (referred to sample gas pressure 1 000 hPa absolute, sample gas flow 0.5 l/min, and ambient temperature 25 °C)

Output signal fluctuation (3σ value)

< ± 1 % of the smallest possible span according to rating plate, with electronic damping constant of 1 s

Zero point drift

< ± 1 % of the current span/week

Measured-value drift

< ± 1 % of the smallest possible span (according to rating plate)/week

Repeatability

< ± 1 % of the current span

Detection limit

1% of the smallest possible span according to rating plate

Linearity error

< ± 1 % of the current span

Influencing variables (referred to sample gas pressure 1 000 hPa absolute, sample gas flow 0.5 l/min, and ambient temperature 25 °C)

Ambient temperature

< 2 %/10 K referred to smallest possible span according to label

Accompanying gases

Deviation from zero point (for influence of interfering gas, see section "Cross-interference")

Sample gas flow

0.2% of the current measuring span with a change in flow of 0.1 l/min within the permissible flow range

Sample gas pressure

< 1 % of the current span with a change in pressure of 100 hPa

Power supply

< 0.1 % of the current span with rated voltage ± 10 %

Electrical inputs and outputs

Analog output

0/2/4 ... 20 mA, isolated; max. load 750 Ω

Relay outputs

6, with changeover contacts, freely parameterizable, e.g. for measuring range identification; load: 24 V AC/DC/1 A, isolated

Analog inputs

2, dimensioned for 0/2/4 ... 20 mA for external pressure sensor and correction of cross-interference

Binary inputs

6, designed for 24 V, isolated, freely parameterizable, e.g. for measuring range switchover

Serial interface

RS 485

Options

AUTOCAL function with 8 additional binary inputs and 8 additional relay outputs, also with PROFIBUS PA (on request) or PROFIBUS DP (on request)

Climatic conditions

Permissible ambient temperature

-40 ... +70 °C during storage and transportation, 5 ... 45 °C during operation

Permissible humidity (dew point must not be fallen below)

< 90 % relative humidity as annual average, during storage and transportation