7MB2541-.....-....

General information

Based on DINВ ENВ 61207/IECВ 1207. All data based on digital gas mixture H₂ in N₂

Measuring ranges

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

Span

Application-dependent (see ordering data)

Measuring ranges with suppressed zero point

Application-dependent (see ordering data)

Operating position

Front wall, vertical

Conformity

CE marking in accordance with EN 50081‑1/EN 50081‑2 and RoHS

Design, enclosure

Degree of protection

IP20 according to ENВ 60529

Weight

Approx. 13 kg

Electrical characteristics

EMC interference immunity (electromagnetic compatibility)

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

Electrical safety

In accordance with ENВ 61010-1; overvoltage category II

Auxiliary power (see nameplate)

100В VВ AC -10%В ...В 120В VВ AC +10%,
48В ...В 63В Hz

or

200В VВ AC -10%В ...В 240В VВ AC +10%,
48В ...В 63В Hz

Power consumption

Approx. 30 VA

Fuse values

100В to 120В V: 1.0 T/250

200В ... 240В V: 0.63 T/250

Gas inlet conditions

Sample gas pressure

800В ...В 1В 100В hPa (absolute)

Sample gas flow

30В ...В 90В l/h

Sample gas temperature

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

Temperature of the measuring cell

70 ВєC

Time response

The time and measuring response refers to the measurement of H₂ in N₂

Warm-up period

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

Delayed display (T₉₀)

Approx. 35В s (including dead time)

Damping (electrical time constant)

0В ...В 100В s, configurable

Dead time (the diffusion to the probes is the determining variable)

Approx. 34В s

Measuring response

The time and measuring response refers to the measurement of H₂ in N₂ (based on the sample gas pressure 1В 000В hPa absolute, sample gas flow 0.5В l/min, and ambient temperature 25В В°C)

Output signal fluctuation
(3Пѓ value)

<В В±В 1% of the smallest possible span according to rating plate with electronic damping constant of 1В s

Zero point drift

<В В±В 1% of the current span/week

Measured-value drift

<В В±В 1% of the smallest possible span (according to rating plate)/week

Repeatability

<В В±В 1% of the current span

Detection limit

1% of the smallest possible span according to rating plate

Linearity error

<В В±В 1% of the current span

Influencing variables

Based on sample gas pressure 1В 000В hPa absolute, 0.5 l/min sample gas flow and 25В В°C ambient temperature

Ambient temperature

<В 2%/10 K referred to smallest possible span according to label

Accompanying gases

Deviation from zero point (for influence of interfering gas, see section "Cross-interference")

Sample gas flow

0.2% of the current measuring span with a change in flow of 0.1 l/min within the permissible flow range

Sample gas pressure

< 1% of the current span with a change in pressure of 100В hPa

Auxiliary power

<В 0.1% of the current span with rated voltage В±В 10%

Electrical inputs and outputs

Analog output

0/2/4В ...В 20 mA, floating; max. load 750В О©

Relay outputs

6, with changeover contacts, freely configurable, e.g. for measuring range identification; load: 24В V AC/DC/1В A, isolated

Analog inputs

2, dimensioned for 0/2/4 ... 20 mA for external pressure sensor and correction of cross-interference

Digital inputs

6, designed for 24В V, isolated, freely configurable, e.g. for measuring range switchover

Serial interface

RSВ 485

Options

AUTOCAL function with 8 additional digital inputs and relay outputs, also with PROFIBUSВ PA (on request) or PROFIBUSВ DP (on request)

Climatic conditions

Permissible ambient temperature

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

Permissible humidity (dew point must not be fallen below)

< 90% relative humidity as annual average, during storage and transportation