General

Measurement ranges

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

Smallest possible span (relating to sample gas pressure 1 000 hPa absolute, 0.5 l/min sample gas flow, and 25 °C ambient temperature)

0 ... 10 vpm O₂

Largest possible measuring span

0 ... 100%

Operating position

Front wall vertical

Conformity

CE mark in accordance with EN 50081-1, EN 50082-2 and RoHS

Design, enclosure

Degree of protection

IP20 according to EN 60529

Weight

Approx. 11 kg

Electrical characteristics

EMC interference immunity (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

100 ... 120 V AC (nominal range of use 90 ... 132 V), 48 ... 63 Hz or

200 ... 240 V AC (nominal range of use 180 ... 264 V), 48 ... 63 Hz

Power consumption

Approx. 37 VA

Fuse values

100 ... 120 V: 1.0T/250

200 ... 240 V: 0.63T/250

Gas inlet conditions

Sample gas flow

• through the sensor

7.5 l/h

• Overall consumption

15 ... 30 l/h

Permissible sample gas pressure

• Without internal pressure regulator

2 000 hPa (abs.)

• With internal pressure regulator

2 000 ... 6 000 hPa (abs.)

Sample gas temperature

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

Sample gas humidity

< 1% relative humidity

Dynamic response

Warm-up period

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

Damping (electrical time constant)

0 ... 100 s, configurable

Dead time (high-pressure version) (purging time of the gas path in the unit at 125 ml/min)

10 ... 30 s

Dead time (low-pressure version without pump)

< 5 s

Dead time (low-pressure version with pump)

< 10 s

Time for device-internal signal processing

< 1 s

Pressure correction range

Pressure sensor internal

800 ... 1 100 hPa (abs.)

Measuring response

Based on sample gas pressure 1 013 hPa absolute, 7.5 l/min sample gas flow and 25 °C ambient temperature

Output signal fluctuation

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

Zero point drift

< ± 1% of the current span/month

Measured-value drift

< ± 1% of the current span/month

Repeatability

< 3% of the current measuring span

Detection limit

1% of current measuring range,

< 0.1 vpm in measuring range

0 ... 10 vpm

Linearity error

< 2% of the current measuring span

Influencing variables

Based on sample gas pressure 1 013 hPa absolute, 7.5 l/min sample gas flow and 25 °C ambient temperature

Ambient temperature

< 2%/10 K referred to current measuring span

Sample gas pressure only possible if the sample gas can flow out into the ambient air

• With deactivated pressure compensation: < 1% of current span/1% pressure change
• With activated pressure compensation: < 0.2% of current span / 1% pressure change

Residual gases, deviation from zero point

• Catalytically active sensor (CAZ)

Only gases with non-combustible residual gas components can be introduced

• Catalytically inactive sensor (CIZ)

Residual gas concentration of 10 vpm H₂; CO and CH₄ have a lower cross-interference; higher HCs are negligible

Sample gas flow

< 2% of the smallest possible span with a change in flow of 10 ml/min

Power supply

< 0.1% of the current measuring range with rated voltage ± 10%

Electrical inputs and outputs

Analog output

0/2/4 ... 20 mA, 4 … 20 mA (NAMUR), isolated; max. load 750 ?

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 influence of residual gas (correction of cross-interference)

Digital inputs

6, designed for 24 V, isolated, freely parameterizable, e.g. for measurement 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

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

Permissible humidity

< 90% relative humidity as annual average, during storage and transportation (must not fall below dew point)