EPM/SMS MANUAL
7
118026-001 REV K
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.
IMPORTANT:
Before connecting the power supply to the
AC line, follow this step-by-step procedure.
Do not connect the power supply to the AC
line until Step G is reached.
Failure to follow these procedures may void
the warranty.
A)
Insure that the high voltage cable is properly
terminated to the load. Insure that all circuits connected
to the high voltage output are safely interlocked against
accidental contact. Insure external load is discharged.
B)
Check the input voltage rating on the serial
nameplate of the supply and make certain that this is the
rating of the available power source. EPM/SMS modules
operate on 28Vdc unless ordered with a different input
voltage option. External fusing is required for the DC
input power. For the EPM/SMS series a 3A type fuse
shall be used. The SMS series uses a 5A fuse.
C)
PROPER GROUNDING TECHNIQUE:
The
chassis of high voltage power supplies must be grounded,
preferably to a water system ground using copper pipe or
other earth ground. See Figure 3.1 for a typical operating
setup. The return line from the load should be connected
to the power supply chassis. Using a separate external
ground at the load is not recommended.
D)
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.
E)
Hook-up:
Connect control and monitoring
connections as described in this manual.
F)
For initial turn-on, program the voltage and
current for zero output. Connect the enable/disable signal
to disable, open the interlock.
G)
The DC input power may now be connected.
H)
Enable the power supply via the enable/disable
logic signal.
I)
Slowly program the output voltage and current to
desired level. Monitor the output voltage and current via
the monitoring test points. Note equipment operation is
normal, i.e. Load is behaving as predicted.
J)
To turn high voltage off, use the enable/disable
signal. If equipment is to be kept off for extended
periods, disconnect power supply from the DC INPUT
source.
Note:
(SMS ONLY) If an over voltage condition occurs,
the power supply will latch off. To reset the power
supply, remove the line voltage and reconnect.
WARNING
AFTER TURNOFF, DO NOT HANDLE THE LOAD
UNTIL THE CAPACITANCE HAS BEEN
DISCHARGED!
LOAD CAPACITANCE MAY BE DISCHARGED BY
SHORTING TO GROUND.
WARNING
THE VOLTAGE MONITOR ON THE POWER
SUPPLY FRONT PANEL DOES NOT READ THE
OUTPUT VOLTAGE WHEN THE POWER IS
TURNED OFF, EVEN IF A CHARGE STILL EXISTS
ON THE LOAD.
CAUTION
ALWAYS OPERATE THE UNIT WITH THE COVER
ON. DO NOT ATTEMPT TO ACCESS OR REPAIR
ANY INTERNAL CIRCUITS. DANGEROUS AND
LETHAL VOLTAGES ARE GENERATED INSIDE
THE MODULE.
