Watson Marlow Pumps 505LA Bedienungsanleitung Seite 15

DANGER! - EXPLOSION HAZARD
Failure to ensure dissipation of static may cause fire or explosion.
The resistance from any point on the pumphead guard to the earth
terminal is typically 25 Ohms.
Before commissioning:
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To fit an extension pumphead
The front of the 505L pumphead is fitted with a cover plate held in place with two screws. It must be
removed before a second pumphead can be fitted.
Lift the two levers at either side of the pumphead and remove the track.
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Remove the two screws securing the cover plate to the front of the fixed pumphead. A stubby
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crosspoint screwdriver may be convenient for this. Remove the cover plate.
Grease the projecting shaft tongue at the rear of the extension pumphead and the slot at the front of
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the fixed pumphead. Position the extension pumphead so that the tongue and slot engage, and
PB0379:m-505atex-en-04
Test the maximum resistance from any point on the guard to
earth. The resistance must not exceed 1 MΩ.
Test the maximum resistance from a metal point on the rotor
assembly to the drive casework. The resistance must not exceed
1 MΩ.
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