MSA Ultima - Mounting Your Gas Monitor; Mounting Guidelines for the Explosion-Proof Ultima Gas Monitor

Mounting Your Gas Monitor
Generally, the unit or the remote sensing module should be
mounted close to the area where a leak is likely to occur or
where the gas is expected. The Ultima Gas Monitors or the
remote sensing module should be installed at a high level
(ceiling) or low level (floor), depending on the density of the gas
most likely to be found. Mount the unit so that the front display of
the unit is not blocked or hidden from view.
"!
CAUTION
Mount the Ultima Gas Monitor or the remote sensing module
with its sensor inlet fitting (FIGURE 1-1 or 1-2) pointed
downwards; otherwise, the inlet may become clogged with
particulate matter or liquids. Do not paint the Ultima Gas
Monitor. If painting is done in an area where a sensor is
located, exercise CAUTION to ensure paint is not deposited
on the sensor inlet fitting. Such paint deposits would interfere
with the diffusion process, whereby a sample of the
monitored atmosphere diffuses into the sensor. In addition,
solvents in the paint may cause an alarm condition to occur.
Protect the Ultima Gas Monitor from extreme vibration. Do not
mount the sensing head in direct sunlight as this may cause
overheating of the sensor.
"!!
WARNING
Do not locate the general-purpose enclosure models in an
area which may contain a flammable mixture of gas and
air; otherwise, an explosion may occur.
The general-purpose Ultima Gas Monitors can be a source
of ignition and must not be mounted in an area where a
flammable mixture of combustible gas and air may be
present; otherwise, an explosion may occur. If such a
location must be monitored, use an explosion-proof Ultima
Gas Monitor model.
Mounting Guidelines for the Explosion-Proof Ultima
Gas Monitor
An explosion-proof model of the Ultima Gas Monitor can be
mounted in Class I, Groups B, C and D, Division 1, Hazardous
Locations defined by Article 500 of the National Electrical Code
(NEC). The term "explosion-proof" is used as defined by the
NEC, Article 100:
“Explosion-Proof” Apparatus: Apparatus enclosed in a case
that is capable of withstanding an explosion of a specified
Chapter 1, Set-up
1-7