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DOC1049R (22 February 2024 12:07)
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To purge the instrument:
•
Remove the blanking plugs from the gas purge inlets on the instrument probe and
body; these are push fit connectors.
•
Connect either a 4mm
or 5/32” diameter stainless steel or PTFE hose to the purge inlet
ports.
•
Ensure the gas tubes are connected to a suitable gas supply via a flow meter (we
recommend 1 adjustable flow meter per instrument)
•
Adjust the total flow to 0.5 - 2 litres per minute (The pressure drop through the unit is
<1 barg).
•
Do not turn off the purge during normal operation; this will impact the instrument
’s
performance.
•
If the purge tubing is disconnected, the blanking plugs must be fitted to the inlet
connections on the probe and body to maintain the IP rating and exclude dust.
The IRmadilloNA requires a stabilisation period of >12 hours once powered on and purging
has started. This is to allow the internal components to reach a stable temperature and
complete purging. Once fully purged the instrument is very robust against changes in ambient
conditions, provided the purge gas supply is maintained.
1.2. Avoiding fouling
The diamond window at the tip of the probe must be in contact with process fluid to give a
measurement. Even a thin layer of scaling or fouling will prevent the IRmadilloNA from being
able to ‘see’ the process fluid.
To minimise the risk of fouling of the diamond window, we recommend taking the following
steps during installation:
