Hach SC4500 Basic User Manual page 20

4.4 Close the cover
Electrocution hazard. High voltage wiring for the controller is connected behind the high voltage
barrier in the controller enclosure. The barrier must remain in place except when installing modules,
or when a qualified installation technician is wiring for power, relays or analog and network cards.
Close the controller cover and make sure that the cover screws are tight to keep the environmental rating of the
enclosure.
After the power connections are made, install the high-voltage barrier. Make sure that the high-
voltage barrier is correctly put on the enclosure guides and fixed to the main PCBA. Make sure that
the lower part of the high-voltage barrier (soft rubber lip) is correctly installed and has no
deformation. Refer to
Close the controller cover. Tighten the cover screws with 2 Nm (17.70 lbf-in) torque. Refer to
Figure 7 on page 14.
Figure 11 Install the high voltage barrier
4.5 Connect measurement devices
Connect digital devices (e.g., sensors and analyzers) to the device connectors on the instrument.
Refer to Figure 12. Keep the device connector caps for future use.
Make sure that the device cables do not cause a trip hazard and do not have sharp bends.
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Figure 11.
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