General

Measuring ranges

4, switchable internally and externally; autoranging is also possible

Smallest possible measuring range

Depending on application, e.g., CO: 0 … 10 vpm, CO₂: 0 … 5 vpm

Largest possible measuring span

Depending on application

Measuring range with suppressed zero

Every zero possible within 0 to 100 Vol.%, smallest possible measuring span 20%

Characteristic

Linearized

Position of use

Front panel vertical

Conformity

CE identification EN 50081-1, EN 50082-2

Design, enclosure

Weight

Approx. 15 kg (with one IR channel),

approx. 21 kg (with two IR channels)

Degree of protection

IP20 according to EN 60529

Electrical characteristics

Electromagnetic compatibility (EMC)

According to standard requirements of NAMUR NE21 (08/98)

Electrical safety

According to EN 61010-1, overvoltage category III

Power supply

100 to 120 V AC (rated range 90 to 132 V), 48 to 63 Hz or

200 to 240 V AC (rated range 180 to 264 V), 48 to 63 Hz

Power consumption

1-channel unit: approx. 40 VA

2-channel unit: approx. 70 VA

Fuses

• 100... 120 V

1T/250 (7MB2121), 1.6T/250 (7MB2123)

• 200... 240 V

0.63T/250 (7MB2121), 1T/250 (7MB2123)

Gas inlet conditions

Perm. sample gas pressure

• for analyzers with hoses

• without pressure switch

600 to 1500 hPa (absolute)

• with pressure switch

600 to 1300 hPa (absolute)

• for analyzers with pipes (without pressure switch)

600 to 1500 hPa (absolute)

Sample gas flow

18 to 90 l/h (0.3 to 1.5 l/min)

Sample gas temperature

0 to 50 °C

Sample gas humidity

< 90 % RH (relative humidity) or depending on application, non condensing

Time response

Warm-up period

With amb. temperature < 30 min (maximum accuracy achieved after 2 hours)

Response time (T₉₀ time)

Dependent on length of analyzer cell, sample gas line and damping

Damping (electric time constant)

0 to 100 s, programmable

Dead time (purging time of gas path in analyzer at 1 l/min)

Approx. 0.5 to 5 s, depending on version

Time for internal signal processing

< 1 s

Pressure correction range

Pressure sensor

• internal

600 to 1200 hPa absolute

• external

600 to 1500 hPa absolute

Measuring response (maximum accuracy achieved after 2 hours)

Output signal fluctuation

± 0.1 % to ± 1 % of smallest possible measuring range specified on rating plate depending on application with the unit specific electronic time constant (corresponds to ± 0.33% at 2σ)

Zero drift

< 1% of measuring range/week

Measured-value drift

< 1% of measuring range/week

Repeatability

≤ 1% of respective measuring range

Minimum detectable quantity

1% of smallest measuring range

Linearity error

< 0.5% of full-scale value

Influencing variables (referred to 1000 hPa sample gas pressure, 0.5 l/min sample gas flow and 25 °C ambient temperature)

Ambient temperature

< 1% of measuring range/10 K (for a constant temperature of the reception cell)

Sample gas pressure

With pressure compensation: < 0.15% of span/1% change in atmospheric pressure

without pressure compensation: < 1.5% of span/1% change in atmospheric pressure

Sample gas flow

Negligible

Power supply

< 0.1% of output signal span with rated voltage ± 10%

Ambient conditions

Application-dependent influencing of measurement if ambient air contains measured component or cross-sensitive gases

Electric inputs and outputs

Analog output

0/2/4 to 20 mA. floating; load ≤ 750 Ω

Relay outputs

6, with changeover contacts, freely parameterizable, e.g. for range identification; loading capacity: 24 V AC/DC / 1 A floating, non sparking

Analog inputs

2, designed for 0/2/4 to 20 mA, for external pressure sensor and correction of influence of residual gas (correction of cross interference)

Binary inputs

6, designed for 24 V, floating, freely parameterizable, e.g. for range switching

Serial interface

RS 485

Options

Autocal function with 8 additional binary inputs and 8 relay outputs, also with PROFIBUS PA and PROFIBUS DP

Ambient conditions

Permissible ambient temperature

-30 to +70 °C during storage and transport, +5 to +45 °C during operation

Permissible humidity

< 90 % RH (relative humidity) as annual average, during storage and transport (dew point must not be fallen below)