19 unit Siemens

Measurement ranges

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

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

0 ... 10 vpm O₂

Largest possible measuring span

0 ... 99999 vpm

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 (Electromagnetic Compatibility)

In accordance with standard requirements of NAMUR NE21 (08/98) and EN 61326

Electrical safety

According to EN 61010-1, overvoltage category II

Auxiliary power

100 ... 120 V AC (nominal use range

90 ... 132 V), 48 ... 63 Hz or

200 ... 240 V AC (nominal use range

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

2000 hPa (abs.)

• with internal pressure regulator

2000 ... 6000 hPa (abs.)

Sample gas temperature

0 ... 50 °C

Sample gas humidity

< 1% relative humidity

Dynamic response

Heating time

at room temperature < 30 min (the technical specification is will be observed after 2 hours)

Display delay (T₉₀)

~ 1 min upon switch from N₂ to air

Damping (electrical time constant)

0 ... 100 sec, parameterizable

Dead time (purge time of the gas route in the device at 125 ml/min)

10 ... 30 sec

Time for device-internal signal processing

< 1 sec

Pressure correction range

Pressure sensor internal

800 ... 1100 hPa (abs.) (permissible sample gas pressure, see gas inlet conditions)

Measuring behavior (relating to sample gas pressure 1000 hPa absolute, 7.5 l/min sample gas flow and 25 °C ambient temperature)

Output signal fluctuation

< 1 % of the smallest possible measurement range as per nameplate with electronic damping constant of 1 s

Zero point drift

< ± 1% of the current measuring span/month

Measured value drift

< ± 1% of the current measuring span/month

Repeat precision

< 3% of the current measuring span

Minimum detectable quantity

1% of current measurement range,

< 0.1 vpm in measurement range

0 ... 10 vpm

Deviation of linearity

< 2% of the current measuring span

Influencing variables (relating to sample gas pressure 1000 hPa absolute, 7.5 l/min sample gas flow and 25 °C ambient temperature)

Ambient temperature

< 2%/10 K relating to the current measuring span

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

When pressure compensation has been switched off: < 1% of the current measuring span/1% pressure change

When pressure compensation has been switched on: < 0.2% of the current measuring span/1% pressure change

Carrier gases, zero point deviation

• Catalytically active sensor (CAZ)

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

• Catalytically inactive sensor (CIZ)

Carrier gas concentration of 10 vpm H₂; CO and CH₄ have a low diagonal effect; higher CVs (concentration values) are negligible

Sample gas flow

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

Auxiliary power

< 0.1% of the current measurement range with nominal voltage ± 10%

Electrical inputs and outputs

Analog output

0/2/4 ... 20 mA, 4 ... 20 mA (NAMUR), potential-free; apparent ohmic resistance max. 750 Ω

Relay outputs

6, with changeover contacts, freely parameterizable, e.g. for measurement range identification; load capacity: 24 V AC/DC / 1 A, potential-free

Analog inputs

2, designed for 0/2/4 ... 20 mA for pressure sensor external and carrier gas inflow correction (diagonal gas correction)

Binary inputs

6, designed for 24 V, potential-free, freely parameterizable, e.g. for measurement range changeover

Serial interface

RS 485

Options

AUTOCAL function each with 8 additional binary 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 during operation

Permissible humidity

< 90% relative humidity within average annual value, during storage and transportation (no passing below the dew point)