Page 13
Section 3 – Standard Connections
Dukane Manual Part No. 403-610-02
Earth
Ground
#14 Gauge
Stranded or
Solid Wire
Fixed Probe Mount
or 2nd Chassis
Grounding Stud
3rd Chassis
Grounding
Stud
Chassis Grounding
Stud
Recommended
protective
earth ground connection
wire
color
: green or green
with yellow stripe.
To minimize electrical noise
and eliminate ground currents,
ground the chassis as shown.
Use a STAR configuration
(illustrated below). Do not
DAISY CHAIN the grounds.
RFI Grounding (PE)
In addition to the safety considerations previously men-
tioned, proper grounding at the generator power cord is
essential for the effective suppression of electrical noise
or RFI (Radio Frequency Interference). Every ultrasonic
generator contains a RFI filter which blocks noise on the
AC power line from entering the system control circuitry.
This filter also prevents ultrasonic frequency noise from
being fed back into the AC power line. In order for the
RFI filter to operate properly, it is necessary to correctly
ground the system. Run a grounding wire from the ground-
ing stud PE connection to the nearest grounded metal pipe
or equivalent earth ground, and secure it with a ground
clamp.
See Figure 2-8 on Page 12 for the location of the PE stud.
Proper Handling of Cable Slack
Coil Extra Slack
When taking up slack in cables, the extra length should
be coiled up as shown in Figure 2-9 rather than folded as
shown in Figure 2-10.
Avoid Excessive Bending
Avoid excessive tension and bends on cables. Cables
should be routed so that there are no abrupt bends in the
cables, especially near their connectors.
Figure 2-9
Cable Slack Take-up - Correct
Figure 2-10
Cable Slack Take-up - Incorrect
NOTE
Cables shown in the two figures below are
representative samples. If cables have
slack, coil them rather than fold them.
