Out-Of-Box-Inspection; Visual Inspection; Electrical Inspection; Test 1 - Lambda 303 Series Operator's Manual

OUT-OF-BOX-INSPECTION

3. OUT-OF-BOX-INSPECTION
3.1

VISUAL INSPECTION

Prior to shipment, this instrument was inspected and found to be free of mechanical and
electrical defects. As soon as the unit is unpacked, inspect for any damage that may
have occurred in transit. Verify the following:
A. Check the operation of the front panel control (knob should rotate smoothly).
B. Confirm that there are no dents or scratches on the panel surfaces.
C. Check front panel meters and LEDs for any broken or cracked lenses.
If any damage is found, follow the instructions in Section 3.3 and in the "Returning
Equipment" instructions in the preamble section of this manual.
3.2

ELECTRICAL INSPECTION

Before the power supply is installed in a system, verify that no internal damage occurred
during shipping. A simple preliminary electrical test should be performed. These tests
are described below. Note: The sequences described are for L models, for S models
the corresponding signals must be applied and monitored through the remote control in-
terface.
3.2.1

TEST 1

Purpose: Verify general logic operation and generate maximum output current and
check overload protection circuits. With AC power "OFF" and disconnected, short the
H.V. output by connecting the center conductor of the output cable to its return shield
(braid). This dead short will allow the unit to generate full output current at zero voltage.
1. Set the output voltage control to zero. Connect the AC power to the unit. Turn "ON"
the AC power front panel switch.
2. Turn the front panel keyswitch to the LOCAL position (if applicable). Press the H.V.
"ON" button and turn up the H.V. control until the power supply is generating output
current into the dead short. The current meter will indicate max. current. The voltage
meter will read zero and the power supply will intermittently turn on and off indicating
the "overload" condition. The unit should continue to cycle in this mode with a 1 sec.
repetition rate indefinitely. (The power supply will go into overload when max. current
is drawn for more than half a second).
3. Turn off the H.V. and A.C. power switches.
This test indicates the inverter section is generating maximum current and the logic and
overload circuitry works correctly.
3.2.2

TEST 2

Purpose: Verify that the power supply generates maximum rated voltage, and the regu-
lation and feedback circuits are functioning.
1. With AC power OFF and disconnected, connect an appropriate load capacitor to the
power supply output cable.
2. Prepare to charge the capacitor. NOTE: Operating a 203 or 303 power supply into
an open circuit (no load operation) will instantly damage the power supply's H.V.
output diodes. Make sure the load (capacitor) is connected and the H.V. output ca-
ble is securely inserted and connected.
83-489-009 Rev A
3-9