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)

0.5% v/v 2% v/v or 5% v/v O₂

Largest possible measuring span

100% v/v O₂ (for a pressure over 2000 hPa: 25 % 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 (see Table 1 in „Function“)

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

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. 35 VA

EMC interference immunity (ElectroMagnetic Compatibility)

According to standard requirements of NAMUR NE21 (08/98), EN 61326, EN 50270 (with gas warning unit)

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

• For analyzers with piping

500 … 3000 hPa absolute

• For analyzers with hoses

• Without pressure switch

500 … 1500 hPa absolute

• With pressure switch

500 … 1300 hPa absolute

Sample gas flow

18 … 60 l/h (0.3 … 1 l/min)

Sample gas temperature

0 … 50 ºC

Sample gas humidity

< 90 % RH (RH: relative humidity)

Time response

Warm-up period

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

Response time (T₉₀)

min. 1.5 to 3.5 s depending on version

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

• External

500 … 3000 hPa absolute

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 2σ)

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%/month of respective measuring span

Minimum detectable quantity

1% of current measuring range

Linearity error

< 1%/month 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

< 0.5%/10 K referred to the smallest possible measuring span according to rating plate, with measuring span 0.5%: 1%/10 K

Sample gas pressure (with air (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

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 to 20 mA, floating; max. load 750 Ω

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 … 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 to +70 °C during storage and transport, +5 to +45 ºC during operation

Permissible humidity

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