HP 3478A Technical Manual page 16

2-1. 2-1. INTRODUCTION INTRODUCTION
2-2. 2-2. This section This section of of the
information and instructions to install and interface the -hi information and instructions to install and interface the -hi
Model 3478A Digital Multimeter. Included are initial Model 3478A Digital Multimeter. Included are initial
inspection inspection procedures, procedures,
environmental information, and instructions for repacking environmental information, and instructions for repacking
the instrument for shipment. The information in this the instrument for shipment. The information in this
section is for Service Trained Personnel. section is for Service Trained Personnel.
The information in this manual is for the use of The information in this manual is for the use of
Service Trained Personnel. To avoid electrical shock, do Service Trained Personnel. To avoid electrical shock, do
not perform any procedures in this manual or do any not perform any procedures in this manual or do any
servicing to the 3478A unless you are qualified to do servicing to the 3478A unless you are qualified to do so.
2-3. 2-3. INITIAL INITIAL INSPECTION INSPECTION
2-4. 2-4. The The 3478A 3478A
mechanically and electrically before shipment. It should mechanically and electrically before shipment. It should
be free of mars or scratches and in perfect electric; order be free of mars or scratches and in perfect electric; order
upon receipt. The multimeter should be upon receipt. The multimeter should be inspected for any
damage that may have occurred in transit. If the shipping damage that may have occurred in transit. If the shipping
container or cushioning material is damaged, should be container or cushioning material is damaged, should be
kept until the contents of the shipment hay been check kept until the contents of the shipment hay been checked
for for completeness completeness and and
mechanically and electrically checked. Procedure for mechanically and electrically checked. Procedure for
checking the electrical performance of the 3478A al in checking the electrical performance of the 3478A al in
Section IV. If there is mechanical damage, the cot tents Section IV. If there is mechanical damage, the cot tents
are incomplete, or the multimeter does not pass the are incomplete, or the multimeter does not pass the
Performance Test, notify the nearest Hewlett-Packard Performance Test, notify the nearest Hewlett-Packard
office (a list of the -hp-Sales/Service offices is located i office (a list of the -hp-Sales/Service offices is located i
the back of the manual). If the shipping container the back of the manual). If the shipping container
damaged or the cushioning material shows signs C damaged or the cushioning material shows signs C
stress, notify the carrier as well as the Hewlett-Packard stress, notify the carrier as well as the Hewlett-Packard
office. Save the shipping material for the carrier's office. Save the shipping material for the carrier's
inspection. inspection.
2-5. 2-5. POWER REOUIREMENTS POWER REOUIREMENTS
2-6. 2-6. The 3478A The 3478A requires requires a a power
120w 220V, or 240V ac (- 10%, + 5%), 48Hz to 440Hz 120w 220V, or 240V ac (- 10%, + 5%), 48Hz to 440Hz
sing phase. The maximum power consumption is 25VA. sing phase. The maximum power consumption is 25VA.
For the 3478A to meet its noise and normal mode For the 3478A to meet its noise and normal mode
rejection specifications, the multimeter must be operated rejection specifications, the multimeter must be operated
using line frequency of either 50Hz or 60Hz (dependent using line frequency of either 50Hz or 60Hz (dependent
on instrument option). A listing of the 3478A's power on instrument option). A listing of the 3478A's power
options, the corresponding power line voltages and options, the corresponding power line voltages and
frequencies, and fuses are as follows: frequencies, and fuses are as follows:
the manual manual has has the the necessary necessary
power power requirements, requirements,
was was carefully carefully inspected inspected
inspected for any
the the instrument instrument ha ha
power source source of of 100V,
SECTION II SECTION II
INSTALLATION INSTALLATION
Option Option
Option Option 315 315
Option 316 Option 316
Option Option 325 325
Option 326 Option 326
Option 335 Option 335
Option Option 336 336
Option Option 345 345
Option 346 Option 346
Before Before
3478A,make sure the power source 3478A,make sure the power source
matches the power requirements of the matches the power requirements of the
multimeter, as marked on the rear panel multimeter, as marked on the rear panel
so.
(below the power receptacle). If the (below the power receptacle). If the
instrument is incompatible with the instrument is incompatible with the
available power source, go to available power source, go to paragraph
2-7 to reconfigure the multimeter. 2-7
bot bot
2-7. 2-7. Line Line Frequency
ed
been been
To avoid electrical shock and personal To avoid electrical shock and personal
in- jury, make sure the multimeter is in- jury, make sure the multimeter is
disconnected from its external power disconnected from its external power
voltage source before removing any voltage source before removing any
covers. covers.
2-8. 2-8. The The Power
3478A is done by the 8 section "DIP" switch at the 3478A is done by the 8 section "DIP" switch at the
multimeter's rear panel. Locate the switch (shown in multimeter's rear panel. Locate the switch (shown in
Figure 2-1) Figure 2-1) and set the switch to the desired power
frequency (50Hz or 60Hz), as shown in the figure. T frequency (50Hz or 60Hz), as shown in the figure. To set
the 3478A's correct line voltage, perform the following the 3478A's correct line voltage,
100V,
2-1 2-1
Voltage and Voltage and F F re requency quency
100V ac 100V ac @ @ 50Hz 50Hz
100V ac 100V ac @ @ 60Hz 60Hz
120V 120V ac ac @ @ 50Hz 50Hz
120V 120V ac ac @ @ 60Hz 60Hz
220V ac 220V ac @ @ 50Hz 50Hz
220V ac 220V ac @ @ 60Hz 60Hz
240V ac 240V ac @ @ 50Hz 50Hz
240V 240V ac ac @ @ 60Hz 60Hz
CAUTION CAUTION
connecting connecting power power
to reconfigure the multimeter.
Frequency and and Line Line Voltage
Power Line Line Frequency Frequency configuration
and set the switch to the desired power
perform the following
Figure 2-1. 1. Line Frequency Figure 2- Line Frequency Switch
TM 11-6625-3071-14 TM 11-6625-3071-14
Fuse Fuse
250mA 250mA
250OmA 250OmA
250mA 250mA
250mA 250mA
125mA 125mA
125mA 125mA
125mA 125mA
125mA 125mA
to to the the
paragraph
Voltage Selection Selection
configuration of of the the
o set
Switch