ST/STR/STA MANUAL
7
118107-001 REV J
Chapter 3
Operating Instructions
3.1 Operation
WARNING
THIS EQUIPMENT GENERATES
DANGEROUS VOLTAGES THAT MAY BE
FATAL. PROPER GROUNDING OF ALL
HIGH VOLTAGE EQUIPMENT IS ESSENTIAL.
WARNING
BEFORE CONNECTING THE POWER
SUPPLY TO THE AC LINE, FOLLOW THIS
STEP-BY-STEP PROCEDURE.
DO NOT CONNECT THE POWER SUPPLY
T
O THE AC LINE UNTIL STEP ‘G’ IS
REACHED. FAILURE TO FOLLOW THESE
PROCEDURES MAY VOID THE WARRANTY.
A)
Insure that the front panel CONTROL POWER
ON switch is in the OFF position (switch bezel out).
B)
Check the input voltage rating on the nameplate
of the supply and make certain that this is the rating of the
available power source.
C)
PROPER GROUNDING TECHNIQUE:
The
chassis of high voltage power supply must be adequately
grounded, preferably to the local “system ground” (cold
water pipe ground, electrical conduit ground, copper
ground rod, etc) using a heavy gauge copper wire
securely connecting to the ¼-20 ground stud on the rear
panel of the of the unit. See Figure 3.1 for a typical
operating setup.
A heavy gauge user provided “load return” wire must be
connected from the low end of the load back to the ¼-20
ground stud on the rear panel of the power supply. Using
a separate external ground at the load is not
recommended.
A six foot long, captive, four-wire, unterminated line cord
is provided for connecting to the AC supply. The
BROWN, BLACK and BLUE wires are the three phase
inputs. The GREEN/YELLOW wire is for chassis safety
ground connection. This is a safety ground connection
and is NOT adequate for system grounding purposes.
Attach the output cable to the load.
D)
Plug the high voltage output cable provided with
the unit into the rear of the supply and secure
appropriately.
E)
Options Note
: See section 5 for hook up and
operating instructions for the options on your unit.
Custom models may also require set up changes.
F)
For initial turn-on, rotate the front panel
KILOVOLT
control
potentiometer
fully
counter-
clockwise to the zero voltage position.
G)
The input power cable may now be connected to
the AC power line.
H)
Depress the CONTROL POWER ON switch.
The green light inside the switch should light up. The
unit is now in the HIGH VOLTAGE OFF mode. The
HIGH VOLTAGE OFF light should be lit.
I)
Depress and hold the HIGH VOLTAGE OFF
switch. The front panel meters will now read the preset
value of the KILOVOLT control dial and the
MILLAMPERES control dial. To preset the desired level
of the current and voltage during operation, hold the
HIGH VOLTAGE OFF switch and rotate the appropriate
control dial while noting its corresponding meter reading.
Release the HIGH VOLTAGE OFF switch.
NOTE: No actual high voltage is being produced at this
time.
J)
Depress the HIGH VOLTAGE ON switch. The
red light inside the switch should illuminate and the
output will slow start up to the preset level output voltage
and/or output current.
Note:
The ST series is equipped with a slow start circuit
that ramps the output up to its maximum setting in
approximately 10 seconds after the HIGH VOLTAGE
ON switch is depressed.
K)
To terminate the generation of output power,
depress the HIGH VOLTAGE OFF switch. In the HIGH
VOLTAGE OFF mode the power supply’s fault and
interface circuits are still active.
L)
To turn off the power supply, depress the
CONTROL POWER ON switch to release the switch
bezel to the out position. All front panel lights should
extinguish.
