9
Rear Panel Features
The rear panel features of the MegaPulse are shown in Figure 2 and described in Table 2.
Figure 2. Rear Panel Features and Controls
Table 3. Rear Panel Features and Controls
ITEM
NAME
FUNCTION
1
Inlet
Module
Is where the main fuse is located. Replace fuse when necessary, always use a fuse with the same ratings
mentioned in the rear label and in this manual.
Power Switch
The Power Switch is used to turn the tester ON and OFF. It is recommended to fully discharge the main
capacitor before turning off the tester.
2
Electrical Ratings
Indicates the Volts and Fuse rating.
3
Interlock
Emergency Stop
Close: Enables the tester buttons for operation.
Open: Stops any process in the tester, disables the buttons and internally discharges the main capacitor.
The
TRIGGER
and
CHARGE
Indicators will be blinking when interlock is open.
4
TestMinder
Allows the communication between the tester and computer interface; a RS-232 to USB.
5
Fans
The Fans on the rear panel maintain the air flow to cool down the tester.
Fans are ON whenever the tester is ON.
CAUTION: When installing this equipment, make sure not to cover the fans.
7
TRIGGER
indicator
This Red indicator is lit to show that the tester can be trigger.
TRIGGER
indicator is lit for 2 minutes after the
CHARGE
button is pressed.
TRIGGER
indicator will go out after pressing
TRIGGER
button.
TRIGGER
and
CHARGE
Indicators will be blinking if the Interlock Switch is open.
8
VOLTAGE
meter
Displays the output voltage set point.
The voltage reading will increase from zero to the voltage set point when the CHARGE button is pressed.
The Display is measuring the voltage on the main impulse storage capacitor
If keyboard is locked, the display will show OFF when a button is pressed.
9
IMPEDANCE
selector
This switch allows the user the select the desired output impedance, 2 or 12 ohms.
The impedance should be selected before pressing charge or before starting a secuence via TestMinder PC control.
10
OUTPUT
jacks
The impulse waveform appears on the
OUTPUT
jack, referenced to the
RETURN
jack. When the
POLARITY
switch is in the Normal position (
NOR
) the output will be a positive pulse. When the
POLARITY
switch is in
the Reverse position (
REV
) the output will be a negative pulse. Use both jacks at the same time to reduce leads
inductance.
RETURN
jacks
This is the return for the impulse waveform. This jack is referenced to the chassis of the MegaPulse and is
referenced to earth ground as long as the MegaPulse is properly grounded. Even though this jack is referenced
to ground, it should be treated as hazardous whenever the MegaPulse is turned ON.
11
E-STOP
Emergency Stop Button, when pressed a internal discharge network drains the main storage capacitor and
disables the front panel buttons. To resume operation turn E-Stop clockwise.
