Sample Flow Sensor; Particulate Filter; Valve Options - Teledyne 300E Instruction Manual

Model 300E Carbon Monoxide Analyzer
Instruction Manual

10.2.4. Sample Flow Sensor

A thermal-mass flow sensor is used to measure the sample flow through the
analyzer. The sensor is calibrated at the factory with air or N
operate with samples consisting of other gases such as CO2, see section 9.3.5.
This sensor is mounted to a printed circuit board with the Sample Pressure sensor
on the sample chamber; see previous section and Figure 3.6.

10.2.5. Particulate Filter

The Model 300E Gas Filter Correlation Carbon Monoxide Analyzer comes equipped
with a 47 mm diameter, Teflon, particulate filter with a 5 micron pore size.
Replacing this filter with another type is not recommended.
The analyzer is equipped with filters with pore sizes other than 5 microns will not
q
match the EPA Equivalency configuration for this instrument.
Filters made of other materials may react with the sample gas damaging the filter
q
and affecting the analyzer's accuracy.
The filter is accessible through the front panel, which folds down to allow access,
and should be changed according to the suggested maintenance schedule described
in Table 9-1.

10.2.6. Valve Options

A variety of optional valve sets can be purchased for the analyzer which allow the user
to more easily supply and manipulate various calibration gases, such as Zero Air and
Span Gas during various calibration procedures
Option
50 Zero/Span Valve with Span
Shutoff valve.
51 Zero/Span Valve with Zero
Air Scrubber and Span
Shutoff Valve
52 Zero/Span Valve Only
53 Zero/Span Valve with Zero
Air Scrubber only
For more information of these options see Section 5.
P/N 04288 Rev: A
Description
NOTE
. The available options are:
Delivery Conditions
Sources for Zero Air and pressurized Span Gas are external to
the instrument. Span Gas flow is regulated internally.
The source of pressurized Span Gas is external to the
instrument. Zero air is supplied by a Zero Air Scrubber internal
to the instrument Span Gas flow is regulated internally.
Sources for Zero Air and Span Gas are external to the
instrument and provided at atmospheric pressure.
Same as Option 51 with and internal Zero Air Scrubber.
THEORY OF OPERATION
, but can calibrated to
2
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