AMI Analyzer Manual
Important:
7
Safety Considerations:
The unit MUST be installed according to the requirements in the National
Electrical Code, particularly those of article 500, the section that deals
with hazardous atmospheres
.
For AC units, an external circuit breaker or switch MUST be provided to
allow disconnection of the AC power, in close proximity to the analyzer
and within easy reach of the operator!
The ground stud on the main panel MUST be made to a good earth, with a
resistance to ground of less than 1 Ohm USING AT LEAST 16AWG WIRE.
117VAC version is to be installed only in installation (overvoltage) category I or II.
ELECTRICAL SEAL-OFFS ARE REQUIRED ON ALL THE CONDULET ENTRIES, whether the area classification is
Division 1 or Division 2.
We suggest that you use universal couplings between the analyzer and the seals so
that you can disconnect the analyzer if necessary without cutting wires.
The unit is designed for installation in either a general purpose or a Class 1 Div. 1 or Div. 2 Group B,C,D area,
but it is also designed so that a hazardous gas may be introduced into its main enclosure (the box on the
right hand side) as it is intrinsically safe. This gas may be any group B,C or D gas.
The unit consists of two enclosures mounted on a back panel. The smaller enclosure on the left is explosion-
proof and contains the electrical connections for the user, and also the power supply and safety
components for the other enclosure.
The larger enclosure on the right contains the controls, the analytical circuitry, the sample handling
components and the oxygen sensor. This circuitry is designed for intrinsic safety and approved as meeting
requirements for Class 1 Div. 1 Group B,C,D by CSA to UL standards.
There is a USB connection available from the explosion-proof section. This may be wired up permanently, or
may be used occasionally by removing the explosion-proof cap. If so, the area MUST be declassified first.
The sample vent should be brought to a safe place – don’t let it vent a flammable sample inside a
meter/analyzer building.