Watson-Marlow 501RLA User Manual page 36

Check the effectiveness of any earth connection by measuring its electrical resistance. The resistance must
not exceed 1 MΩ.
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:
•
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.
PB0346:m-501atex-en-03 34