Teledyne 300P - Percent oxygen analyzer - Manual (Page 5)

1-1 Teledyne Analytical Instruments
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Introduction
1.1 General
The Model 300P Percent Oxygen Transmitter is designed to accu-
rately monitor the oxygen content on a percent basis in a wide variety of
gases. The Percent Oxygen Transmitter is equipped with two oxygen
analysis ranges, 0–25% and 0–20.9% (air calibration range). The Model
300P is approved by Factory Mutual (FM) as intrinsically safe for opera-
tion in Class 1, Division 1, Groups A, B, C, and D hazardous environ-
ments.
The heart of the transmitter is Teledyne Brown Engineering's Micro-
Fuel Cell oxygen sensor. This cell is a sealed electrochemical device which
translates the amount of oxygen present in a sample into an electrical
current. Since it is sealed, there is no electrolyte to change or electrodes to
clean and therefore, virtually maintenance free.
The transmitter operates from a 24 VDC (nominal) power source and
produces a 4–20 mA dc current output that is directly and linearly propor-
tional to the oxygen concentration. The output current is used to interface
with devices such as recorders, alarms, computers or other current driven
devices.
1.2 Features
The following features describe the basic model. The exact configura-
tion depends on the options selected at the time of purchase.
• Two analysis ranges: 0–25% and 0–20.9%
• High sensitivity (0.5%)
• Accurate (±2% of full scale at constant temperature and
pressure of calibration) or ±5% of full scale over the operating
temperature range.