KEPCO KLR Series User Manual - Manual (Page 30)

2-6
KLR 091313
2.3 SOURCE POWER REQUIREMENTS
This power supply operates with the installed circuit breaker from single phase a-c mains power
over the voltage and frequency ranges specified in Table 1-3 without adjustment or modification.
2.4 COOLING
The power devices used within the power supply are maintained within their operating tempera-
ture range by means of internal heat sink assemblies cooled by three internal (d-c type) cooling
fans.
ALL INLET AND EXHAUST OPENINGS AT THE FRONT AND REAR OF THE POWER SUP-
PLY CASE MUST BE KEPT CLEAR OF OBSTRUCTION TO ENSURE PROPER AIR ENTRY
AND EXHAUST. Although not a requirement, it is recommended that side and top vent openings
be clear of obstruction for more efficient cooling. Periodic cleaning of the power supply interior is
recommended by authorized service personnel only (see KLR Service Manual for instructions).
If the power supply is rack mounted, or installed within a confined space, care must be taken
that the ambient temperature, which is the temperature of the air immediately surrounding the
power supply, does not rise above the specified limits (see Table 1-3).
2.5 PRELIMINARY OPERATIONAL CHECK
A simple operational check after unpacking and before equipment installation is advisable to
ascertain whether the power supply has suffered damage resulting from shipping.
Refer to Figures 2-1 and 2-2 for location of operating controls and electrical connections. Table
2-1 explains the functions of operating controls and indicators.
NOTE: This test must be performed with IEEE 488, RS 232 [standard models], LAN [E-Series
models] and ANALOG I/O ports disconnected, and ANALOG I/O SETTINGS switch
positions 3 and 5 set to OFF.
1. With POWER circuit breaker set to OFF position, connect the power supply to source
power (see PAR. 2.7.2).
2. With no load connected, set POWER circuit breaker to the ON position (see PAR. 3.2.1).
Each time the unit is turned on an internal self-test is performed. After the test has been
successfully completed, the unit displays the following:
• The status display flashes MODL (model) for two seconds while the DC VOLTS display
shows Eo
MAX
and the DC AMPERES display shows Io
MAX
. (E.g. for model 75-32, DC
VOLTS reads 75 and DC AMPERES reads 32.)
• Then the status display flashes LMT (Limit model) for two seconds while the DC VOLTS
display shows Eo
MAX
and the DC AMPERES display shows Io
MAX
. (E.g. for model
75-32, DC VOLTS reads 75 and DC AMPERES reads 32.)
• Then the status display flashes PROT (protection limits) for two seconds while the DC
VOLTS display shows 120% of Eo
MAX
and the DC AMPERES display shows 120% of
Io
MAX
. (E.g. for model 75-32, DC VOLTS reads 90.0 and DC AMPERES reads 38.4.)