Site Installation Guidelines - Hach AS950 Manual Del Usuario

Section 5 Installation
Multiple hazards. Only qualified personnel must conduct the tasks described in this
section of the document.
5.1 Confined space precautions
Explosion hazard. Training in pre-entry testing, ventilation, entry procedures,
evacuation/rescue procedures and safety work practices is necessary before entering
confined spaces.
The information that follows is supplied to help users understand the dangers and risks that are
associated with entry into confined spaces.
On April 15, 1993, OSHA's final ruling on CFR 1910.146, Permit Required Confined Spaces, became
law. This standard directly affects more than 250,000 industrial sites in the United States and was
created to protect the health and safety of workers in confined spaces.
Definition of a confined space:
A confined space is any location or enclosure that has (or has the immediate potential for) one or
more of the following conditions:
• An atmosphere with an oxygen concentration that is less than 19.5% or more than 23.5% and/or a
hydrogen sulfide (H
• An atmosphere that can be flammable or explosive due to gases, vapors, mists, dusts or fibers.
• Toxic materials which upon contact or inhalation can cause injury, impairment of health or death.
Confined spaces are not designed for human occupancy. Confined spaces have a restricted entry
and contain known or potential hazards. Examples of confined spaces include manholes, stacks,
pipes, vats, switch vaults and other similar locations.
Standard safety procedures must always be obeyed before entry into confined spaces and/or
locations where hazardous gases, vapors, mists, dusts or fibers can be present. Before entry into a
confined space, find and read all procedures that are related to confined space entry.

5.2 Site installation guidelines

Explosion hazard. The instrument is not approved for installation in hazardous locations.
This instrument is rated for an altitude of 2000 m (6562 ft) maximum. Although the use of this
equipment above the 2000 m altitude does not show any substantial safety concern, the
manufacturer recommends that users with concerns contact technical support.
Refer to the guidelines that follow for the site location evaluation.
• Obey all the safety precautions if the sampler is installed in a confined space. Refer to
space precautions
• Make sure that the temperature at the location is in the specification range. Refer to
on page 3.
• Install the sampler on a level surface or hang the sampler with the suspension harness, the
support bracket or the spanner bar. Refer to
the applicable installation documentation.
• Install the sampler as near the sample source as possible. Refer to
on page 13.
10 English
S) concentration that is more than 10 ppm.
2
on page 10.
D A N G E R
D A N G E R
D A N G E R
Install the sampler in a manhole
Confined
Specifications
on page 11 and to
Plumb the sampler