Eclipse Combustion EGA4 - Manual (Page 14)

Instruction Manual MM850481 ed.01
The color of the spot on the filter is compared with a graduated (from 0 to 9) reference scale and it is called “smoke
index”.
You can type in the instrument up to 3 smoke index values; the analyzer calculate the average value and can print these
values on the report.
Normative and laws about the air pollution, describe the procedure: DIN51402, 2116, 2117 and 2297 VDI directives,
ASTM D 2156-63 T, etc.
4.2.3.1 Measuring instruments (option)
1. Smoke pump: it should suck 5.75 litres ±0.25 l (normalized to 0°C, 760mmHg) through a 1 cm 2 filter.
2. Smoke index reference table: it is a grey scale sheet with 10 different areas numbered from 0 to 9. The number 0
corresponds to a 85% ±2.5% reflection. Every area reflects 10% less than the previous one. The scale is used to
compare the scale with the paper filter and to calculate the smoke index.
3. Paper filter: When it is clean it has a reflection corresponding to the 0 scale index. It also has 3 litres per cm 2 a
minute (normalized to 0°C, 760mmHg) with a 200/800 mmwc resistance to the air flux.
4.2.4 Other measurements
The analyzer has an auxiliary input for special probes connections. Available probes are: ambient CO monitoring,
temperature & humidity (T+RH%) measurement and natural gas monitoring probes.
An optional operative mode is the leakage pipe test to check gas network tightness using pressure decay method at
programmable interval time.
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