Installation; Initial Inspection; Installation Of Option 042; Introduction - HP 3484A Operating And Service Manual

Model 34 84A
Section Il
SECTION II
INSTALLATION
2-1. INTRODUCTION.
This section contains info rmation and instructions nec-
essary for installing th e Mo del 3484A Multifunction Unit in
· the Model 34 80A/ B Digital Voltmeter. In addition , in-
structions are given for installing the available options in
the 3484A. This section also includes initial inspection
procedures and instructions fo r repackaging for shipment.
2-2. INITIAL INSPECTION.
This instrument was carefully inspected both mechanically
and electrically before shipment.
It
should be free from
mars or scratches and in perfect electrical order upon
receipt. To confirm this, the instrument sho uld be in-
spected for physical damage in transit, and the electrical
performance should be tested using the procedure outlined
in Paragraph S-3 . If there is damage or deficiency, see t he
warranty inside the front cover of this manual.
2-3. INSTALLATION.
Instructions fo r installing th e Model 34 84A in the 3480A/ B
Digital Voltmeter are given in Figure 2-1. Instal lation
instructions fo r the Model 3480A/ B are given in the
3480A/ B Operating and Service Manual.
2-4. INSTALLATION OF ISOLATED REMOTE
OPTION 041 .
The following procedure gives instructions for installing the
Model 111 SI A Isolated Remo te Assembly (Option 041) in
the 3484A.
If
it is desired to operate remotely a 34 84A
having Isolated Remo te, in a 34 80A/ B t hat does not haye
Isolated BCD Option 004 , remove the Isolated Remote
Assembly by reversing the installation procedure.
a. Visually check the assembly to make sure that the
molded coils offset from one printed circuit board
are adjacent to and aligned with the coils on the
other board. See Figure 2-2.
b. Remove 3484A top and bottom guard covers.
MANY COMPONENTS AND AREAS
WITHI N THE 3484A SHOULD NOT BE
TOUCHED. DIRT OR FINGERPRI NTS
CA N CAU SE CONTAMI NATI ON
WHICH WILL DEGRADE THE OPER-
ATION OF THE INSTRUMENT. WEAR
CLEAN RUBBER OR COTTON
GLOVES WHEN WORKING WITHIN
THE INSTRUMENT.
c. Remove the small printed circuit board , having
cable attached , fro m printed circuit connector JS
on t he to p side of the master board, near the rear
of the instrument.
d. Hold the Isolated Remote Assembly as near as
possible to the position it will occupy in the
3484A and insert the small printed circuit board
into printed
circuit connector J4.
See Figure 2-2.
e. Insert the other end of the Isolated Remo te
Assembly into connector J S on t he master board.
f. If the 3484A has Option 043 true rms ac converter
instal led, remove hold down screws and
tilt the ac
converter assembly so that t he master board is
accessible.
g. Secure the Isolated Remote Assembly by instaJUng
a screw through t he master board into the spacer
on the Remote Assembly. This screw should be a
6-32 x 1/4 pan head pozidriv machine screw with
lockwasher, -hp· Part No. 2360-0113.
h. Replace ac converter assembly.
i. Replace top and bottom guard covers.
2-5. INSTALLATION OF OHMS CONVERTER OPTION
042.
a. Remove 3484A to p guard cover.
WEAR CLEAN RUBBER OR COTTON
GLOVES WHEN WORKING WITHIN
THE 3484A. DIRT OR FINGERPRINTS
ON THE SWITCHES OR PRINTED CIR·
CUIT BOARDS WILL DEGRADE THE
PERFORMANCE OF THE INSTRU-
MENT. BE CAREFUL NOT TO APPLY
ANY PRESS URE TO REED RELAYS.
b . Insert Ohms Converter printed circuit board into
connector J6 and secure at o pposite end with two
screws provided . (6-32
x
S/16 pan head pozidriv
with external tooth Jockwasher, -hp- Part No.
2360-0ll S)
2-1