Galvanic Applied Sciences 943-TGS-CE, Operation Manual

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Revision 5 123 August 2021
7.5 Measurement Cell Block Removal
The measurement cell block will require removal only when there is a suspected sampling
problem or if it becomes necessary to clean or change the cell windows and/or O-Rings. A
sampling problem could be due to system plugging or collection of nongaseous material in the
measurement cell.
The measurement cell is to be removed by trained and authorized personnel only.
Follow the procedure to remove the measurement cell block from the analyzer.
1. Place the analyzer in Offline mode by toggling the Online / Offline control toggle
(Section 4.3.1) on the Analysis 2 panel to Offline (red).
2. Place the analyzer in back purge mode by pressing the F6 key on the keypad OR by
placing the X in the
Back Purge
check box on the
Analysis 1
panel.
3. Access the purged control cabinet following proper user company and/or regulatory
agency procedure.
The control cabinet door may NOT be opened while the analyzer is
energized UNLESS the area is known to be non-hazardous. Observe all the
warning labels on the analyzer enclosures. The control cabinet door cannot
be opened while the analzyer is energized unless the purge control box is
first bypassed. Refer to section 3.3.
DO NOT look at the end of disconnected fibres connected to the UV lamp or
place them in contact with skin. The intense UV radiation transmitted
through these fibres can cause eye and skin damage. Fibres should be
capped immediately after disconnection to prevent acidental exposure to
UV radiation.
4. Turn the oven heaters off by locating the Heater AC Power fuse terminal on terminal
block ACTS:25. Lift the fuse terminal tab opening the terminal block and thus
disconnecting the Heater AC Power fuse, as shown in Figure 74.
5. Remove the oven cabinet cover.
The oven cabinet cover is heavy. It may require two people to remove it
safely.
The oven enclosure and all of its components are HOT ( 150°C ). Wear
appropriate personal protective equipment (gloves, eye wear, clothing etc)
if working with hot surfaces or wait until surface have cooled to safe
temperatures before performing maintenance tasks.
6. Allow zero gas to flow for approximately five (5) minutes to remove all toxic gases from
the sample system.
7. Ensure all five block valves in the oven enclosure are in the closed position. Fully close
the Zero Air Flow Adjust valve.