General

Measuring ranges

4, switchable internally and externally; autoranging is also possible

Smallest possible measuring span (referred to 1000 hPa absolute sample gas pressure, 0.5 l/min sample gas flow and 25 °C ambient temperature)

2% v/v or 5% v/v O₂

Largest possible measuring span

100 % v/v O₂

Measuring ranges with suppressed zero

Any zero point is possible between 0 and 100 % v/v as long as a suitable reference gas is used

Position of use

Front panel vertical

Conformity

CE identification EN 50081-1, EN 50082-2

Design, enclosure

Degree of protection

IP20 according to EN 60529

Weight

Approx. 13 kg

Electrical characteristics

Power supply
(see rating plate)

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

Power consumption

Approx. 37 VA

EMC interference immunity (ElectroMagnetic Compatibility)

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

Electrical safety

According to EN 61010-1, overvoltage category III

Fuses

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

Gas inlet conditions

Permissible sample gas pressure

• External reference gas supply

800 … 1200 hPa

• with integrated pump

atmospheric pressure ± 50 hPa

Sample gas flow

18 … 60 l/h (0.3 … 1 l/min)

Sample gas temperature

0 … 50 ?C

Sample gas humidity

< 90% relative humidity

Time response

Warm-up period

With ambient temperature < 30 min

(maximum accuracy achieved after 2 hours)

Response time (T₉₀)

3.5 s

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 2.5 s, depending on version

Time for internal signal processing

< 1 s

Pressure correction range

Pressure sensor, internal

500 … 2000 hPa absolute (permitted sample gas pressure see gas inlet conditions)

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

Output signal fluctuation

< 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?)

Zero drift

< 0.5%/month of smallest possible measuring span specified on rating plate

Measured-value drift

< 0.5%/month of respective measuring span

Repeatability

< 1% of respective measuring span

Minimum detectable quantity

1% of current measuring range

Linearity error

< 1% of respective measuring span

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

Ambient temperature

< 0.1% [% O₂] /1 K referred to the smallest possible measuring span according to rating plate

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)

Without pressure compensation:

< 2% of measuring span/1% change in pressure;

with pressure compensation:

< 0.2% of measuring span/1% change in pressure

Residual gases

Deviation in zero point corresponding to paramagnetic or diamagnetic deviation of residual gas (see table)

Sample gas flow

< 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

Power supply

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

Electric inputs and outputs

Analog output

0/2/4 … 20 mA, floating; max. load 750 ?

Relay outputs

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

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-selectable, e.g. for range switching

Serial interface

RS 485

Options

Autocal function with 8 binary inputs and 8 relay outputs; also with PROFIBUS PA or PROFIBUS DP

Ambient conditions

Perm. ambient temperature

-30 … +70 °C during storage and transport,

+5 … +45 ?C during operation

Permissible humidity

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