Description - M&C SP Series Instruction Manual

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Description

The sample probes are designed for easy installation, reliable operation and trouble-free maintenance.
Advantages are:
Gas sampling with dust-laden processes;
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low volume, fast response time;
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filter elements can be changed without tools and without disconnecting the sample line;
•
the filter chamber can be easily cleaned;
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the probe tube can be cleaned without dismantling the probe;
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self-regulated electrical heating with under temperature alarm contact, and different probe tubes
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and pre-filters as option;
with calibration gas connection as standard.
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The 75 mm [≈ 2.95"] ceramic filter element with a porosity of 2 µm and a large surface is located in the
heated stainless steel filter housing of the probe. The gas sample probe is heated up to
+120 °C/+160 °C/+180 °C [248 °F/320 °F/356 °F] (see T-class in the technical data) using a special
self-regulated heating element. No thermostat or temperature limiter is necessary. A separate thermo
switch is provided for under temperature monitoring (NO).
The dilution unit including the critical orifice is mounted directly at the heated part of the probe, to avoid
a drop of temperature below the dewpoint at the dilution unit. This keeps the dilution unit at a stable
temperature. The incorporated pre-heater heats up the dilution gas to the probe temperature. The
sample gas probe can be heated up to max. 180 °C [356 °F].
To calibrate a gas analyzer, test gas can enter the probe via the integrated test gas connection.
The necessary dilution gas pressure can be adjusted by the precision pressure controller with
pressure gauge. A vacuum pressure gauge monitors the function of the dilution injectors.
The pressure controller and pressure gauges, necessary for the dilution function, have to be ordered
separately. Set-A will be mounted directly at the probe. The control unit -S will be mounted externally,
and is equipped with an additional shut-off ball valve and a flowmeter to adjust the test gas quantity.
The dilution probe has a standard dilution rate of 10:1 up to 500:1 (injector I). Higher dilution rates of
50:1 to 2000:1 are optional (injector II).
The construction of the probe guarantees an operation which is independent from the process
temperature and pressure (see technical data), and is easy to maintain.
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