11
K600000000SE 030804 011018
The dilution system allows to have the CO sensor efficient any time and ready to perform properly even in case
of very high concentration of CO.
The dilution system also allows to extend the measurement range of the CO sensor as follows:
- up to 100,000 ppm for a CO sensor with 8000 ppm full scale
- up to 250,000 ppm for a CO sensor with 20,000 ppm full scale
In this way in addition to better manage the wearing of the sensor, it is also possible to continue sampling,
without any work interruption.
4.4 Fuel types
The device is provided with the technical data of the most common types of fuels stored in its memory. By using
the PC configuration program, available as an option, it is possible to add fuels and their coefficients in order to
define up to a maximum of 32 combustibles, other than the default ones.
For more details see Annex B.
4.5 Pressure sensor, piezoelectric, temperature compensated
The instrument is internally provided with a piezoresistive differential pressure sensor, temperature compensated,
for measuring pressure or draft.
This sensor is differential type thus, thanks to the second measurement port, can be used for measuring the draft
(depressurization) in the chimney, for the leak test of the pipes, for differential pressure measurement, for
measuring the velocity of the flue gas using a Pitot tube, for flow measurement, and possibly for other
measurements (pressure of gas in the piping, pressure loss across a filter, etc.).
The measurement range is -10,00 hPa .. +200,00 hPa.
Any potential drift of the sensor are nulled thanks to the autozeroing system which in this instrument can NOT be
operated with the flue gas probe inserted in the chimney.
WARNING
ANY PRESSURE APPLIED TO THE SENSOR GREATER THAN ±300 hPa MAY CAUSE A
PERMANENT DEFORMATION OF THE MEMBRANE, THUS DAMAGING IRREVERSIBLY
THE SENSOR ITSELF.
4.6 Gas extraction pump
The sample pump located inside the instrument is a DC-motor-driven diaphragm pump, powered by the
instrument, and is such as to obtain optimal flow of the sampled gas being analysed; an internal sensor that
measures the flow allows to:
- Keep the flow rate of the pump constant
- Check the efficiency of the pump
- Check the degree of clogging of the filters
4.7 Simultaneous measurement of pressures, O
2
, pollutants
The instrument, to obtain boiler’s perfect combustion parameters, allows to measure simultaneously the input and
output pressure of the gas valve, the level of O2, the levels of pollutants and all the calculated parameters
needed to obtain the correct value of yield.
See section 14.1.3.
4.8 Smoke measurements
It is possible to enter the smoke values measured according to the Bacharach scale. The instrument will calculate
the average and print the results in the analysis report.
An external pump, available as an option, must be used to perform this measurement.
4.9 Temperature measurements
CHEMIST 600 can measure several types of temperatures taking advantage of dedicated probes.
4.10 Auxiliary measurements
This analyzer also features a connection to optional external sensors for draft measurement according to the
UNI10845 standard as well as for the measurement of the ionization current in the boilers.
4.11 Pressure decay test
The instrument can perform the tightness test of a piping according to the Italian standards UNI 7129-1: 2015 and
UNI 11137: 2012.
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