2
INPUT CURRENT
Typically, 0.8 A rms with a
48-W dc load and a 120-V ac input. Protected with
a 2-A fuse on the 100- and 120-V ac settings, and
by a 1-A fuse on the 220- and 240-V ac settings.
DC OUTPUT
Maximum rated output currents are:
DC Voltage
Maximum Current
+12 V
1 A
!
12 V
1 A
+24 V
0.5 A
!
24 V
0.5 A
Maximum dc output power from 0 to 50
E
C is 48W.
Derate 2.5%/
E
C for 50 to 60
E
C.
DC REGULATION
Variations in dc output voltages
are <±0.1 % over the combined range of zero
through full load and input voltages from t he
minimum to maximum limits of the allowed input
volt age range. Measurements are made within a 1
-minute period. Regulation <±0.3% over any 24-hour
period at constant ambient temperature for the
same load and input voltage ranges after a 60-
minute warmup.
LONG-TERM STABILI TY
DC output voltages
change <±0.5% (after a 60-minute warmup) over a
6-month period at constant load, input voltage, and
ambient temperature.
OUTPUT IMPEDANCE
<0.3
Ù
at any frequency up
to 100 kHz for the dc outputs.
TEMPERATURE COEFFICIENT
<0.02%/
E
C from
0 to 60
E
C for the dc outputs.
NOISE AND RIPPLE
<3 mV peak-to-peak for any
dc output, as obs erved on a 50-MHZ bandwidth
oscilloscope.
VOLTAGE ADJUSTMENT
±5% minimum range.
Range typically ±1 V about the nominal supply
voltage. Resettability <±0.05% of the supply voltage.
RECOVERY TIME
<50
ì
s to return to within ±0.1%
of the rated voltage for all dc out puts for any input
voltage change within the rated range, or for a
change of load current from 10 to 100% of full load.
THERMAL PROTECTION
The red, front-panel,
TEMP light turns on when the temperature of the
side-panel heat sink is within 13
E
C of the maximum
operating temperature limit When t he heat sink
temperature exceeds the 95
E
C maximum limit, a
thermal switch automatic ally turns off the power
supply. Under this thermal shut-down condition, both
t he TEMP and the POWER lights are turned off.
Recovery from thermal shut-down is automatic once
the load is reduced, so that the heat sink
temperature drops below the maximum operating
limit.
CIRCUIT PROTECTION
Fuse Rating: 2 A (FAST)
size 3AG fuse for 100-V or 120-V operation; 1 A(F)
size 5×20 mm fuse for 220-V or 240-V operation. All
dc outputs include a current foldback circuit to limit
the out put c urrent to nominally 150% of the rated
value. This feature provides short-circuit and
overload protection. Recovery is automatic after
removal of the overload condition.
2.2. CONTROLS AND INDICATORS
POWER
Front-panel two-position roc k er switch
turns power on or off. Adjacent red light indic at es
power On condition when illuminated. Power
indicator light and output power turn off if t he heat
sink temperature exceeds 95
E
C.
TEMP
Front-panel red light turns on when the heat
sink temperature exceeds 82
E
C to warn that the
shutdown temperature limit is being approached.
TEMP light turns off if power has been shut off by
exceeding the heat sink temperature limit.
2.3. INPUTS
AC POWER
Rear-panel, Corcom™, international-
standard IEC power connector, type CEE-22,
accepts power cables wired according to local
electrical standards. A power cable is shipped with
the 4002P. The Corcom CEE-22 connector meets
standard 22 of the International Commission on
Rules for the Approval of Electrical Equipment. The
primary voltage selector and primary fuse are
incorporated into the AC POWER connector. The
primary voltage selected (100, 120, 220, or 240 V)
is visible through the rear door. U.S.A. standard in-
line fuse is 2 A for 100 or 120 V ac and 1 A for 220
or 240 V ac. See Sections
, respectively,
for instructions on changing the voltage setting and
fuse.
2.4. OUTPUTS
PREAMP 1, PREAMP 2, PREAMP 3, PREAMP 4
Rear-panel, 9-pin, "D" connectors (Amphenol
17-10090) provide power for up to
four
preamplifiers. Connectors mate with power cords on
all standard ORTEC preamplifiers. Compatible with
