General information

Based on DIN EN 61207/IEC 1207. All data based on digital gas mixture H₂ in N₂

Measuring ranges

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

Largest possible measuring span

100 vol.% H₂ (for smallest measuring span, see "Function")

Measuring ranges with suppressed zero point

Any zero point within 0 ... 100 vol.% can be implemented; smallest possible measuring span: 5% H₂

Operating position

Front wall, vertical

Conformity

CE mark in accordance with EN 61326/A1 and EN 61010/1

Design, enclosure

Degree of protection

IP65 according to EN 60529

Weight

Approx. 25 kg

Electrical characteristics

EMC interference immunity (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.

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

Electrical safety

In accordance with EN 61010-1; overvoltage category II

Auxiliary power (see nameplate)

100 V -10% ... 120 V +10% AC, 48 ... 63 Hz or 200 V -10% ... 240 V +10% AC, 48 ... 63 Hz

Power consumption (unit)

Approx. 20 VA

Fuse values

100 to 120 V: 1.0T/250
200 ... 240 V: 0.63 T/250

Gas inlet conditions

Sample gas pressure

800 to 1 100 hPa (absolute)

Sample gas flow

30 to 90 l/h (0.5 to 1.5 l/min)

Sample gas temperature

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

Temperature of the measuring cell

Approx. 60 ?C

Sample gas humidity

< 90% relative humidity

Purging gas pressure

• Permanent

165 hPa above ambient pressure

• For short periods

Max. 250 hPa above ambient pressure

Time response

Based on sample gas pressure 1 000 hPa absolute, 0.5 l/min sample gas flow and 25 °C ambient temperature

Warm-up period

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

Delayed display (T₉₀)

< 5 s

Electrical damping

0 ... 100 s, configurable

Dead time (at 1 l/min)

Approx. 0.5 s

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 (maximum accuracy achieved after 2 hours)

< ± 0.75% of the smallest possible measuring range according to rating plate, with electronic damping constant of 1 s (? = 0.25%)

Zero point drift

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

Measured-value drift

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

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 1013 hPa absolute, 0.5 l/min sample gas flow and 25 °C ambient temperature

Ambient temperature

< 1%/10 K referred to smallest possible measuring span according to rating plate

Accompanying gases

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

Sample gas flow

< 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

Sample gas pressure

< 1% of the current measuring range with a pressure change of 100 hPa

Electrical inputs and outputs

Analog output

0/2/4 ... 20 mA, floating;
load max. 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 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 in operation

Permissible humidity (dew point must not be fallen below)

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