Model 2180A
3
1.0 Before Installation
1.1 Differences Between Models 2180A and 2180
2180A differences:
• Wiring: Connectors must be rewired for 2180A
• Auto-Calibration
• Front Panel: Polycarbonate with inlay
• Digital Display
Refer to Section 2.0, Installation and Section 3.0, Startup and Operation, for
details.
1.2 General Product Description
The Model 2180A is a single-channel controller, which continuously monitors the
inputs of a sensor. The controller should be mounted in a weather protected non-
hazardous area. Several GMI accessories are available for panel, wall or 19-inch
rack installation. For hazardous areas an explosion proof housing is available for
Class I, Division 1 and Division 2, Groups B, C, and D.
NOTE: Sensor assemblies may be mounted outdoors in hazardous areas
(National Electric Code Class 1, Division 1 and Division 2, Groups B, C,
and D).
The Model 2180A Hydrogen Sulfide (H
2
S) Monitor has evolved from earlier GMI
systems, which have an established reputation for reliable performance. By
carefully following the instructions in this manual, you can be assured of the most
dependable, continuous protection against hazardous accumulation of hydrogen
sulfide gas. Except for periodic calibration checks, there are no routine
maintenance requirements. The Model 2180A controller is a microprocessor-
based instrument, which features recent advancements in electronic circuitry and
packaging techniques. The system’s sensor is a second-generation product,
incorporating advancements in sensor technology and performance.
Note: The 2180A is different than its predecessor the 2180. The 2180A
calibration is automatic where the 2180 must be manually calibrated.
Please check the individual manuals for details about wiring, set up and
operation of these two units.
CAUTION: The Model 2180A Controller is easy to install and operate. However,
one should fully read and understand this manual before attempting
to place the system in service.
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