Specifications

2-8
Installation
Preparation for Use
Line Voltage Selection
Instrument (Agilent 70843) Line Voltage Selector
There is no Line Voltage Selector switch on the Agilent 70843. The instrument line input
circuits are auto-ranging and will operate at any voltage within the specified voltage range
(90 to 135 and 180 to 264 volts). The Line Input module (on the rear panel) incorporates
an ON/OFF switch - the `0' position is the OFF position. Refer to the paragraph on Line
Fuses on page 2-9 for advice on replacing fuses.
NOTE See page 2-10 for fuse ratings for 115 V ac and 230 V ac operation.
CAUTION Mains supply voltage fluctuations should not exceed +/-10% of the
nominal selected line voltage.
WARNING Appliance coupler (mains input power cord) on the rear panel is the power
disconnect device. Do not position the instrument such that access to the coupler
is impaired. If this instrument is mounted in a rack, access to the appliance
coupler may be impaired. In such an event, make sure that the rack system, in
which the system is mounted, has a readily accessible device which will isolate
the product from the mains supply.
CAUTION This instrument has an autoranging line voltage input, be sure the
supply voltage is within the specified range.
WARNING For continued protection against fire hazard, replace the line fuse only with the
same type and line rating:
F 10A 250V for the 115V Setting (Agilent Part Number 2110-0051) or
F 7A 250V for the 230V Setting (Agilent Part Number 2110-0614).
The Display and Mainframe fuse ratings are 6.3A, 250V (Agilent Part Number
2110-0703) for both 115 and 230V ac operation.
The use of other fuses or materials is prohibited.
Display (Agilent 70004A) Line Voltage Selector
CAUTION Before you connect the power cable to the display, check that the LINE
VOLTAGE SELECTOR switch is set for the correct line voltage
source.
If the wrong voltage is selected, one of the following may happen:
If 115 V line operation is selected and you connect to a 230 V ac line
power source, the fuse may blow.
If 230 V line operation is selected and you connect to a 115 V ac line
power source, the instrument will not power-on correctly.