Michell Instruments Liquidew EExd, Руководство пользователя

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Liquidew EExd User’s Manual
14 97097 Issue 14.1, November 2019
INSTALLATION
2.6 Liquidew EExd Start-up Purge Procedure
!
This is a mandatory procedure stipulated in the ATEX/IECEx
certification of the product. The procedure must be fully
carried out prior to the Liquidew EExd having any power or
signal connections applied. It must also be fully carried out
after the Liquidew EExd and associated sample handling
equipment has been installed and leak checked. Always refer
to Appendix H.4 - Special Conditions of Safe Use.
This procedure must be carried out at any time following
service or maintenance periods that cause any of the
Liquidew EExd or associated sample handling equipment
pipe work to be disconnected.
It is not necessary to carry out this procedure if power or
signal connections only have been disconnected.
1. Before start-up ensure that all power and signal connections to the
Liquidew EExd are fully isolated.
2. Ensure that all Inlet & Outlet liquid connections to the Liquidew EExd are
made correctly and are leak tight checked.
3. Fully open the sample Inlet & Outlet isolation valves.
4. Allow the sample to purge the system for the period of time indicated in
the table below:
TOTAL PURGE TIME
must be a minimum of 1 minute at 1 l/min (0.26 GPM)
Assumes total system pipe length is 3m (9.8') and internal pipe bore is the
recommended 4mm (0.16") internal bore.
For every additional 1m (3.3’) of pipe work, continue the sample purge for
an additional 15 seconds at 1 l/min (0.26 GPM).
5. After the appropriate purge duration, close the sample Inlet & Outlet
isolation valves.
6. Ensure the window is replaced and fully secured before applying the
power.