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Installation 44
Table 2-1. Items Supplied (continued)
Output
hardware
Series 667xA only
Output hardware (screws with nuts and lockwashers) for securing your load wires to the output bus bars
(see Table 1-6).
Pack return
system
Series 668xA Only
(Agilent P/N 5080-2430). Materials and instructions for properly disposing of the shipping carton and
packing materials.
Guide change
page
If applicable, change sheets may be included with this guide. If there are change sheets, make the
indicated corrections in this guide.
Location and Temperature
Bench Operation
The “Supplemental Characteristics” in Chapter 1 give the dimensions of your power supply. The cabinet has plastic feet that
are shaped to ensure self-alignment when stacked with other Agilent System II cabinets. The feet may be removed for rack
mounting. Your power supply must be installed in a location that allows sufficient space at the sides and rear of the cabinet
for adequate air circulation. Minimum clearances are 1 inch (25 mm) along the sides. Do not block the fan exhaust at the
rear of the supply.
Rack Mounting
Series 668xA supplies weigh 51.3 kg (113 lb). Obtain adequate help when mounting the supply in the
rack.
The power supply can be mounted in a standard l9-inch rack panel or cabinet. Rack mounting kits are available as Option
908 or 909 (with handles). Installation instructions are included with each rack mounting kit.
Series 667xA & 668xA
Series 667xA and 668xA supplies require instrument support rails for non-stationary installations.
These are normally ordered with the cabinet and are not included with the rack mounting kits.
Temperature Performance
A variable-speed fan cools the supply by drawing air through the sides and exhausting it out the back. Using Agilent rack
mount or slides will not impede the flow of air. The temperature performance is as follows:
Series 664xA & 665xA Operates without loss of performance within the temperature range of 0 °C to 40 °C and with
derated output from 40 °C to 55 °C.
Series 667xA & 668xA Operates without loss of performance within the temperature range of 0 °C to 55 °C.
It a Series 664xA or 665xA power supply is operated at full output current for several hours, the sheet
metal immediately under the transformer (near the right front) can get very hot. Do not touch this area of
the cabinet. The line cord also can become quite warm. Both of these conditions are normal.