Sample Gas Conditions; Differential Pressure Monitoring - Emerson Rosemount BINOS 100 F Instruction Manual

ATEX Instruction Manual
HAS8xE-IM-ATEX
January 2004
1-3-5

Sample Gas Conditions

Applicable gases:
Maximum sample
gas pressure:
Sample gas flow:
1-3-6

Differential Pressure Monitoring

For analyzers connected to flammable gases (either sample gas or span gas) the operator
needs to ensure that the pressure within the containment system always remains at minimum
50 Pa below the pressure within the analyzer enclosure. This ensures that in case of a leak the
flammable gas does not enter the enclosure.
An additional differential pressure switch is provided to monitor the pressure difference:
In case the pressure difference decreases below 50 Pa the contact opens.
It is the user's responsiblity how to use the signal within his system:
The limit of 50 Pa is the least permissible value given by the standards, higher values are
acceptable, too.
Flame arrestors are required for gas inlets and outlets.
Electrical and mechanical connections are shown in section 2 „Installation".
Emerson Process Management Manufacturing GmbH & Co. OHG
1-3-5 Sample Gas Conditions
Nonflammable gases or
gas mixtures which always
remain below LEL
atmospheric or
<1500 hPa at normal
atmospheric pressure,
dependend on gas
measuring principle
for all sample gases refer to the corresponding analyzer data sheet
MLT 2 / BINOS
Flammable gases
atmospheric or
<1500 hPa at normal
atmospheric pressure,
dependend on gas
measuring principle
and
overpressure < 13 mbar
against surrounding atmosphere

100 F
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