HP 3478A Technical Manual page 18

3478A 3478A
feet are shaped to permit stacking with other half- feet are shaped to permit stacking with other half-
module Hewlett-Packard instruments. module Hewlett-Packard instruments.
2 2 - - 1 1 6 6 . . R R a a c c k k M M o o u u n n t t i i n n g g
2-1 2-17. 7. The 347 The 3478A m 8A may ay be r
mounting kit Option 908. The basic hardware and mounting kit Option 908. The basic hardware and
instructions for rack mounting is contained in the kit. The instructions for rack mounting is contained in the kit. The
kit is designed to permit the 3478A to be mounted in a kit is designed to permit the 3478A to be
standard 19 inch rack, provided standard 19 inch rack, provided that sufficient rear sup-
port is available. port is available.
2- 2-18 18. . HP-I -IB B IN HP INTE TERF RFAC ACE E CO
2-1 2-19. 9. The The 347 3478A 8A is c is comp
Packard Interface Bus (HP-IB). Packard Interface Bus (HP-IB).
HP-IB HP-IB is is
implementation of IEEE Std. 488-1978, implementation of IEEE Std. 488-1978,
"Standard "Standard Digital Digital
Programmable Programmable
ANSI MC. 1.1. ANSI MC. 1.1.
2-2 2-20. 0. The The int interf erface ace con connec
Interface Cable to the 24 pin HP-IB connector located at Interface Cable to the 24 pin HP-IB connector located at
the rear panel. A typical interconnection of an HP-IB the rear panel. A typical interconnection of an HP-IB
system is shown in system is shown in Figure 2-4, Figure 2-4, in which ends of the
cables have both a male and f cables have both a male and female connector to enable
connections to other instruments and cables. As many connections to other instruments and cables. As many
as 15 instruments can be connected to the same as 15 instruments can be connected to the same
interface bus. However, the maximum length of cable interface bus. However, the maximum length of cable
that can effectively be used to connect a group of that can effectively be used to connect a group of
instruments should not exceed 2 meters (6.56 ft.) times instruments should not exceed 2 meters (6.56 ft.) times
the number of instruments connected, or 20 meters (65.6 the number of instruments connected, or 20 meters (65.6
ft.), whichever is less. For a pictorial view of the HP-IB ft.), whichever is less. For a pictorial view of the HP-IB
connector and its pin designation, refer to connector and its pin designation, refer to Figure 2-5.
2- 2-21 21. . AD ADDR DRES ESS S S SEL ELEC
2- 2-22 22. . 3478 34 78A A Ad Addr dre e ss ss. . The HP-IB "talk" and "listen"
be rack ack mou mounte nted by d by add adding
mounted in a
that sufficient rear sup-
CONN NNEC ECTIO TIONS NS
ompati atible ble wit with t h the H he Hewl
NOTE NOTE
Hewlett-Packard's Hewlett-Packard's
Interface Interface For For
Instrumentation" Instrumentation" and and
nectio tion is n is mad made by e by an H an HP-I
in which ends of the
emale connector to enable
Figure 2-5.
ECTI TION ON
The HP-IB "talk" and "listen"
Figure 2-4. Figure 2-4. Typical HP-IB S
address of the 3478A is set by the multimeter's address address of the 3478A is set by the multimeter's address
switch (located at the rear panel). The talk and listen ad- switch (located at the rear panel). The talk and listen ad-
dress is a 5-bit code which is selected to provide a dress is a 5-bit code which is selected to provide a
unique address for each HP-IB instrument. The 3478A unique address for each HP-IB instrument. The 3478A
normally leaves the factory with the address switch set normally leaves the factory with the address switch set to to
ing rac rack k Decimal Code "23". The corresponding ASCII Code is a Decimal Code "23". The corresponding ASCII Code is a
listen address code of "7" and a talk code of "W". Refer listen address code of "7" and a talk code of "W". Refer
to to Figure 2-5 Figure 2-5 for the factory address setting of the switch.
Refer to the Remote Operation Chapter in Sec- tion III of Refer to the Remote Operation Chapter in Sec- tion III of
this manual, for more information on ad- dressing and this manual, for more information on ad- dressing and
address codes. address codes.
2- 2-23 23. .
Only Mode which is selected by the Address Switch. The Only Mode which is selected by the Address Switch. The
ewlett ett- -
mode is selected by setting all the address switches mode is selected by setting all the address switches
(switch 4 to 8) up (on). Refer to the Remote Operation (switch 4 to 8) up (on). Refer to the Remote Operation
Chapter in Section III of this manual for more Chapter in Section III of this manual for more
information. information.
2- 2-24 24. .
P-IB B
2- 2-25 25. .
2-26. 6. 2-2
Table 1-1, the 3478A s Table 1-1
9°F) of the Reference Temperature. The Reference 9°F) of the Reference Temperature. The Reference
Temperature is the temperature in which the 3478A was Temperature is the temperature in which the 3478A was
last calibrated. For example, if the last Reference last calibrated. For example, if the last Reference
Temperature was 230C (73° Temper
tain its sp tain its specific
that temperature. The factory temper that temperatur
to 280C (64° to 280C (
within an ambient tem within an am
to 1310F) with less accuracy. to 1310F) with less accuracy.
Typical HP-IB System Interc ystem Interconnection
2-3 2-3
for the factory address setting of the switch.
34 3478 78A A Ta Talk lk-O -Onl nly y Mo Mode de. The 3478A has a Talk-
ENVI VIRON EN RONMEN MENTA TAL L RE REOU
To prevent electrical fire or shock To prevent electrical fire or shock
hazards, do not expose the instrument hazards, do not expose the instrument
to rain or excessive moisture. to rain or excessive moisture.
Op Oper erat atin ing and S g and Sto tora rage Te ge Temp
To me To meet a et and ma nd maint intain t ain the sp
, the 3478A should be ope hould be operated within
ature was 230C (73°F), the 3478A should ma F), the 3478A should main-
ecifications if ations if operated with operated within ± 5°
e. The factory temperature is from
64° F to 8 F to 82° 2° F). T F). The 3478 he 3478A may b
bient temperature ra perature range of 0°
onnection
TM 11-6625-3071-14 TM 11-6625-3071-14
. The 3478A has a Talk-
OUIR IREM EMEN ENTS TS
mper erat atur ure e
he speci ecific ficati ations l ons list isted in ed in
rated within + 5° + 5° C (± C (±
in-
in ± 5° C (± 9° C (± 9°F) of F) of
ature is from 18° 18° C C
A may be operat e operated ed
nge of 0°C to 55C (32 C to 55C (32° ° F F