7MB8000-4AB

Measuring ranges

4, switchable internally and externally; autoranging is also possible

Smallest possible measuring range

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

Largest possible measuring range

Depending on application

Measuring range with suppressed zero

Any zero point within 0 to 100 % can be achieved; smallest possible span 20 %

Heated version

65 °C

Characteristic

Linearized

Position of use

Front panel vertical

Conformity

CE identification EN 50081-1, EN 50082-2

Design, enclosure

Weight

Approx. 32 kg

Degree of protection

IP65 according to EN 60529, restricted breathing to EN 50021

Electrical characteristics

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

Approx. 35 VA; approx. 330 VA with heated version

Electromagnetic compatibility (EMC)

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

Electrical safety

According to EN 61010-1

• heated units

overvoltage category II

• unheated units

overvoltage category III

Fuses (unit without heater)

• 100... 120 V

F3: 1T/250; F4: 1T/250

• 200... 240 V

F3: 0.63T/250; F4: 0.63T/250

Fuses (unit with heater)

• 100... 120 V

F1: 1T/250; F2: 4T/250

F3: 4T/250; F4: 4T/250

• 200... 240 V

F1: 0.63T/250; F2: 2.5T/250

F3: 2.5T/250; F4: 2.5T/250

Gas inlet conditions

Perm. sample gas pressure

• for analyzers with hoses (without pressure switch)

600 to 1500 hPa (absolute)

• for analyzers with pipes (without pressure switch)

600 to 1500 hPa (absolute)

• Ex (leakage compensation)

600 to 1160 hPa (absolute)

• Ex (continuous purging)

600 to 1500 hPa (absolute)

Purging gas pressure

• Permanent

< 165 hPa above ambient

• For short periods

250 hPa above ambient

Sample gas flow

18 to 90 l/h (0.3 to 1.5 l/min)

Sample gas temperature

0 to 50 °C; with heated version: 0 to 80 °C

Sample gas humidity

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

Time response

Warm-up period

With amb. temperature < 30 min (maximum accuracy achieved after 2 hours); heated version: approx. 90 min

Response time (T₉₀ time)

Dependent on length of analyzer cell, sample gas line and programmed 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 2?)

Zero drift

< 1% of measuring range/week

Measured-value drift

< 1% of measuring range/week

Repeatability

Between 0.1% and 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 absolute 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 setpoint/1% change in atmospheric pressure

Sample gas flow

Negligible

Power supply

< 0.1% of output signal span at 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; 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, 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 selectable, 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)