5.28
6. Lift the magnet assembly (3) carefully, easing it past the gas connections and then resting
it in the case.
To replace magnet assembly:
7. Refit magnet assembly (3) onto the 3 x M6 studs and re-tighten the nuts (20).
8. Fit sample tubes (15) and (16) to the measuring cell (8) using two new 'O' rings. Tighten
the connectors not more than three flats beyond finger tight.
9. Ensure the analyser is leak tight. See Section 5.3.4.
10. Set the mechanical zero. See Section 5.3.3.
5.3.2.1 Removal and Replacement of the Measuring Cell
Refer to Figures 5.1 and 6.2.
1. Remove magnet assembly (3) by following steps 1 to 6 of Section 5.3.2.
2. Unsolder wires from the terminal pins on the back of measuring cell (8).
3. Loosen cell clamp screw (21), M4 (7mm A/F).
4. Remove the 4 x M4 socket head screws (23) (3mm allen key) and then remove Zero
Assembly (22).
5. Grip measuring cell firmly and pull it out of the magnet frame (2).
CAUTION
Do not pull the cell out by its gas connectors.
6. See Section 1.7.5. for the types of measuring cell which may be fitted.
7. Refit zero assembly (22) with the 4 x M4 screws (23) to the magnet frame.
8. The cell must be fitted the right way up. When looking through the window the right hand
dumb-bell must be seen to be forward, and the serial number label must be on the left
side. See Figure 6.2.
9. Tighten cell clamp screw (21) so that the cell is locked firmly.
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