Power Line Module - HP 8340B Operating Instructions Manual

Power Line Module
DESCRIPTION
The line power module contains a safety fuse, and a removable cam that is used as a switch to match
the HP 8340B/41B's power supply to the locally available ac power.
CAUTION:
Do not attempt to rotate the voltage
selector cam while it is installed in the
line module or non-repairable
damage will result. The cam must be
completely removed from the line
module, rotated to the proper posi¬
tion, and reinstalled. Refer to the
instructions below.
Replacement of fuse
1. Pry open line module cover door.
2. Pull out fuse carrier.
3. Insert fuse of proper rating.
4. Place carrier back into line module
Selection of Operating Voltage
1. Pry open line module cover door.
2. REMOVE CAM FROM THE LINE
MODULE.
3. Rotate the cam to the desired voltage.
(When the line module cover is closed, the
selected voltage will be visible through a
small window.)
4. Insert the cam back into the line module.
5. Close the line module cover door.
The HP 8340B/41B requires a maximum of 500 VA of electrical power (40 VA in STANDBY) that is
delivered to the instrument through the line power module. The module setting must match the locally
available voltage, and be fused to provide a measure of safety to the instrument and the operator.
To determine the module's voltage setting, first measure the locally available ac power source. The
HP 8340B/41B requires either 100, 120, 200, or 240 volts with a tolerance of ±10%. The HP
8340B/41B also requires an ac frequency of 47.5 Hz to 66 Hz. Some installations may need an
autotransformer and/or frequency converters to meet the voltage and frequency requirements. After
obtaining suitable voltage and ac frequency, position the selector cam as shown in the accompanying
illustration.
The proper fuse rating also corresponds to the voltage selection, and these ratings are printed on the
rear panel of the HP 8340B/41B adjacent to the line power module (the fuses are also listed in Section
II (Installation) of this Manual).
Appropriate power line cords are listed in Section II (Installation).
Figure 3-24. Power Line Module
HP 8340B/41B
Operating Information
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