Series 4 Operating Manual - Nebula Issue 1.00
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6 Operation
6.1
Services
Signal Group Ltd assumes that the user has a certain level of understanding of gas analysers.
Some aspects of gas analysis can be dangerous without proper training and understanding.
Signal and its representatives are able to provide full analyser training on request. Contact
your local representative for further information.
To use your NEBULA analyser, you will need the following services:
‒
Power:
NEBULA
’s standard universal power supply allows operation from 100Vac to
250Vac at 50 to 60Hz. 600W maximum.
24DC operation is available on request. Please ask for details.
‒
Zero:
Depending on your chosen options, you may need zero-grade compressed air. For
applications where accuracy under 1ppm CH4-equivalent are required, you should use
zero-
grade air or an external air purifier such as Signal’s model AS80 air purifier.
‒
Calibration Gases:
Only NH
3
may be used. Signal recommends a gas concentration close
to the expected measurement level.
The NEBULA’s TDLS detector is manuf
actured to
measure a specific level of concentration. D
o not attempt to measure over your analyser’s
measurement range as you will not get reliable results and may over saturate.
‒
Humidity:
In most cases, the analyser will only read a sample which has more than 5%
H2O in the sample gas. If you intend to analyse gases under this level of humidity you will
need to contact Signal Group LTD to configure the analyser for this, as it will not read
accurately.
CAUTION: If you suspect your gas may have dust load, it is imperative you use the
filtered SAMPLE line to avoid cell contamination. Always use clean, particulate-free
gases for calibration as there is no filter on the Zero/Span inlets.
