Hach sc1000, User Manual

Page: 17 / 64

17
Installation
3.4.3 Wiring for AC Power at the Controller
DANGER
Failure to connect to a good low impedance Protective Earth ground can result in
both a shock hazard and poor performance against electro-magnetic interferences.
1. Obtain appropriate fittings with IP65 environmental rating.
2. Remove the display module from the probe module ( Figure 6 on page 13 ).
3. Remove the four screws securing the probe module front cover. Open the probe
module and disconnect the chassis ground connection from the ground stud to the
cover (
Figure 13 on page 18 ).
4. Remove the six screws from the high voltage barrier and remove the barrier.
5. Insert the wires through the PG1 opening and strain relief fitting or conduit hub.
Tighten the strain relief if used, to secure the cord.
6. Strip the cable outer insulation 260 mm (10 in.). Shorten all wires except the earth
wire 20 mm (0.78 in.), so the earth cable is 20 mm (0.78 in.) longer than the other
cables (
Figure 12 ).
7. Feed the stripped power cable through the ferrite core twice ( Figure 12 ) and wire into
the terminal as shown in Table 5 and Figure 14 . Tug gently after each insertion to
ensure the connection is secure.
8. Seal any unused openings in the controller box with conduit opening sealing plugs.
9. Reinstall the high voltage barrier.
10. Reconnect the chassis ground connection to the ground stud of the probe
module cover.
11. Reinstall the probe module cover and screw into place.
Figure 12 Proper Wire Preparation and Ferrite Core Wiring
1. Power Cable Wire Preparation 3. Power Cable Wires
2. Ferrite Core 4. Power Cables Wrapped Around Ferrite Core
2
4
3
1
260 mm (10 inches)
240 mm (9.75 inches)
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