©
Agilent Technologies 1989–2002
Agilent 3070 / 79000 Site Preparation
11-84
Chapter 11: Site Preparation – Series 3 / 79000 Current Reduction Conversion: Series 3 Current Reduction Conversion Procedure
Reconnect the PDU to the Mains
After the outlets are connected to the PDU(s) per the
appropriate load balancing diagram, have the electrician
re-connect the PDU to the mains. Refer to Chapter 6 to
determine the appropriate wire size and breaker size. If
the mains supply is larger than 10 square millimeters (#8
AWG), see the section
After the PDU has been connected to the mains and
powered, measure that the outlets match the voltage
shown in the appropriate diagram. If they do NOT
match, fix the wiring error before proceeding to the next
step and retest to verify that the power to each outlet is
correct.
Reconnect the Loads
After turning off the PDU On/Off switch, using the
appropriate wiring diagram, reconnect the loads as
indicated. This will provide correct load balancing on
each phase. Be sure to plug in the DUT power supplies,
STC power supplies, fan power and all other
connections in the outlets designated for that purpose.
Verify the System
Use full diagnostics to verify that the system is
functional. See the
Repair I Manual
, Chapter 2 for
more information about diagnostics.
Complete the Conversion
After verifying that the 3070 / 79000 and xDSL/POTS
bay passes diagnostics, complete the conversion:
1
Route the cables neatly and secure them using cable
ties where strain relief will be helpful.
2
Replace the covers on both the 3070 / 79000 testhead
and xDSL/POTS bay.
3
Cross out the old FLA value on the back of the
E1135C and write in the new FLA value from the
appropriate table in Chapter 6.
NOTE
This current reduction conversion procedure is
NOT a warranty cost item. MTD does not
recognize it as a problem, but it does offer the
opportunity for the customer to reduce their power
consumption.
Connecting a Pigtail to the E1135C PDU
The E1135C PDU is the replacement for the E1131A,
and E1135A/B PDUs. The input terminals on the
E1135C on the mains disconnect switch easily fit wire
size 10 square millimeters (#8 AWG). It is strongly
suggested that if the recommended wire size is greater
than 10 square millimeters (#8 AWG), that short power
cord, 450 millimeters (18-inches) to 609 millimeters
(24-inches), called a pigtail be created using 10 square
millimeters (#8 AWG) wire, and the recommended
larger wire size cable be connected to the receptacle
which connects to the pigtail, as shown in
.
