Electron Charge-to-Mass Ratio
Connect Cables and Cords
7
012-14265A
Connect Cables and Cords
1. On the Tunable DC (Constant Voltage) Power Supply II, connect the positive terminal of the
200 V DC
output to the
positive terminal (anode) labeled “
Accelerating Voltage
” on the Platform (red sockets) and connect the negative terminal
of the
200 V DC
output of the power supply to the negative terminal (cathode) on the platform (black sockets).
2. On the Tunable DC (Constant Current) Power Supply,
3.5 A / 6.3 V
, connect both terminals of the
6.3 V AC
output to the
terminals labeled “
Filament
” on the Platform (red sockets).
3. Connect the Helmholtz Coils in series with the Tunable DC (Constant Current) Power Supply,
3.5 A / 6.3 V
. On the power
supply, connect the positive terminal of the
3.5 A
output to the red terminal on the front Helmholtz Coil. Connect the
black terminal of the front Helmholtz Coil to the black terminal of the back Helmholtz Coil. Finally, connect the red ter-
minal of the back Helmholtz Coil to the negative terminal of the
3.5 A
output on the power supply.
•
Note
: Before connecting the power cords, please check that the setting for the input voltage range (110 – 120 V or 220 –
240 V) matches the local AC voltage. For the two power supplies, connect a power cord between the port on the back
labeled “
AC POWER CORD
” and an appropriate electrical outlet.
110 - 120 V or 220 - 240 V
Please make sure that you select the
right setting according to your AC
voltage level.
The product is shipped with the
setting on 230 V. Make sure to check
the setting.
Note:
Before connecting any cords or cables, be sure that all power switches on the
Power Supplies are in the OFF position and all voltage controls are turned fully
counterclockwise.
DANGER
:
High Voltage is applied to the e/m Tube. Avoid contact with any part of the body.
•
Only use safety equipment leads (shrouded patch cords) for connections.
•
Make sure that the power supplies are OFF before making the connections.
•
Make sure that the power supplies are OFF before installing or replacing the e/m Tube.
