Description; User Interface - MSA PrimaX IR Manuel D'utilisation

MSA
2

Description

The device is designed to sample the environment at the installed location and alert
the user to potentially dangerous levels of hydrocarbon gas. The device is shipped
factory calibrated and is labeled with target gas, calibration gas and span setting
information.
The output of the device is a standard 4 to 20 mA with HART. The 4-20 mA signal
communicates the primary measured value using the 4-20 mA current loop. Addi-
tional device information is communicated using a digital signal that is superim-
posed on the analog signal. The device is compliant with HART Communications
Foundation [HCF] Revision 7.0 format. Commercially available hand-held commu-
nicator devices or PC applications can be used to communicate with the device us-
ing the Device Description [DD] file that is available from the HART
Communications Foundation website [www.hartcomm.org].
2.1

User Interface

This device does not provide a visual display of information. The gas level and basic
device status are available via the 4-20 mA output signal. Other detailed device sta-
tus is available via the HART signal. Details about this interface can be found in the
PrimaX IR HART Specification located on the product CD shipped with the device.
The optional calibration cap provides an LCD display for easy and intuitive calibra-
tion of the device. The proper usage of this calibration cap is described in
chapter 4.2.
The device should be installed where gas leaks are anticipated. The installation po-
sition depends on the gas density, either in the upper area of the room beneath the
ceiling for gases lighter than air, or close to the ground for gases heavier than air.
Also consider how air movement may affect the ability of the device to detect gas.
Testing for ventilation patterns may be helpful in establishing locations for the de-
vice in enclosed areas.
Before beginning the installation, check that the delivered components
are complete and correct, referring to the shipping documents and the
label on the shipment carton.
US
PrimaX IR
Description
9