Installation; Locating The Sensor; Installation Height - Honeywell E3Point Manuel D'utilisation

Locating the Sensor

Since the E Point units are shipped with custom network diagrams that
3
indicate best locations for installation, the remaining considerations are
installation height and detection objectives. If the primary application is
the fastest possible leak detection, mount the sensor near the potential
leak sources. As a result, the indicated concentration may not be
representative of personnel exposure and easy access for the required
calibration and maintenance could be compromised.
Air Currents: If there are fans, wind, or other sources of air movement,
gases may tend to rise or collect in certain areas of a facility. The
local air currents should be assessed to aid in selecting the sensor
location. Air convection can often be more important in determining gas
concentration areas than factors of Vapor Density.
Gas Emission Sources: As a rule, at least one sensor should be located
in close proximity to each point where an emission is likely to occur.
CAUTION
!
at the moment, it is very important that the sensor be located where
leaks are most likely to occur.

Installation Height

Detected Gas
CO Carbon monoxide 0.968
H S Hydrogen sulfide
2
*NO Nitrogen dioxide
2
O Oxygen
2
Most combustibles are heavier than air; methane and hydrogen are
exceptions. Sensors for gases that are heavier than air should be
COMB installed approximately 30 cm (1 foot) from the floor. For combustibles
that are lighter than air, sensors should be installed
30 cm (1 foot) from the ceiling, close to the potential leak source.
* May differ in certain applications. Hot NO
WARNING:
!
silicones, some sulfur, phosphorus, and chlorinated compounds may
have a poisoning effect resulting in a loss of sensitivity.
E Point Network Gas Monitor User Manual
3

Installation

:
Because each sensor can only "report" what it is seeing
Relative Density
(air = 1)
1.19
1.58 (cold)
1.43
from exhaust systems is lighter than ambient air.
2
Some materials such as, but not limited to, tetraethyl lead,
Installation Height
1–1.5 m (3–5 ft.) from floor
30 cm (1 ft.) from floor
30 cm -1 m (1–3 ft.) from
ceiling
1–1.5 m (3–5 ft.) from floor
9