Model 4802A
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2.2 Features & Benefits
2.2.1 Automatic Calibration
The unit’s display indicates simple automated calibration prompts to the operator with no
calibration adjustments.
2.2.2 Calibration Check Mode
Verifies the integrity of the sensor by allowing the operator to apply a test gas and view
the response on the display.
2.2.3 Calibration Level
The user specifies the gas concentration to be used for calibration.
2.2.4 Microprocessor Based Electronics
Monitors fault conditions; sensor inputs and provides outputs in the form of display
codes, analog signal, relay contact and open collector activation.
2.2.5 Setup Mode
Allows the user to set parameters such as alarm output options, test options, etc. These
parameters are viewed on the display during the Setup Mode.
2.2.6 Password Option
Prevents unauthorized alteration of the setup parameters (can be disabled).
2.2.7 Setup Check Mode
Allows the user to view the parameters that have been set by the factory and/or an
operator.
2.2.8 LED Test
Tests the integrity of each LED and each segment of the digital display on the front
panel.
2.2.9 Card Test
Tests the functionality of the card through the microprocessor, ramping the signal from 0
to full-scale.
2.2.10 Live Insertion/Removal
Allows the user to insert or remove a module while power is applied to the system,
without damage to any of the components in the system.
2.3 Applications
The General Monitors Model 4802A is a Combustible Gas Control Module designed for
Zero Two Series Applications. Below is a partial list of applications:
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Refineries
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Drilling platforms and rigs
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Gas and oil production platforms
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Gas collection facilities
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Oil well logging operations
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LPG/LNG processing and storage
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Gas Turbines
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Solvent Vapors
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Hydrogen Storage
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Wastewater treatment plants
•
Chemical plants
