4145A Self Test; Test - HP 4145A Operation And Service Manual

SECTION III
Model 4145A
3-10. SELF TEST
3-11. The 4145A is equipped with an automatic
self-diagnostic function that is initiated each
time the instrument is turned on to confirm
normal operation of the instrument's
basic
functions. The SELF TEST can also be initiated
from the DIAGNOSTICS page or via the HP-IB.
When SELF TEST is performed at instrument
turn-on, the five tests listed in Table 3-l are
automatically performed. If the instrument is
operating normally, the MENU page will be
displayed when the SELF TEST is completed. If
an error is detected, an error code will be
displayed on the CRT. When SELF TEST is
initiated from the DIAGNOSTICS page or via the
HP-IB, only two tests are performed (MPU test
and SMU test). If the instrument fails the SELF
TEST, contact the nearest Hewlett-Packard
Service Office (see list at back of this manual).
3-l '2. ERROR MESSAGES/ERROR CODES
3-13. Error messages and error codes are -
displayed on the System Message Line of the
CRT whenever an illegal operation or
out-of-range measurement is made, or whenever
an internal circuit fails. Error messages and
error codes related to operator errors (not
instrument failure) are listed in Table 3-2 and
3-3, respectively. Error
codes
related to
instrument failure are listed in Table 3-4. If the
instrument displays one of the error codes listed
in Table 3-4, contact the nearest Hewlett-
Packard Sales/Service Office.
Note
One of the error codes listed in Table
3-4 may be displayed if the instrument
is turned on after experiencing an
extreme change of
ambient
temperature. In this case, allow the
instrument to fully warm up (ignore
the displayed error code), and then
turn it off and on one time.
Table 3-l. 4145A SELF TEST
I
Test Name
Description
I
I
I
MPU test
Checks the basic functions of the MPU (Microprocessor Unit) by checking
four ROMs (Read-Only Memory) and sixteen RAMS (Randam-Access
Memory).
I
GDU test
I
Checks the functions of the GDU (Graphics Display Unit).
I
MSU test
I
Checks the MSU (Mass Storage Unit : Flexible Disc Drive and Disc).
I
HP-IB test
I
Checks all HP-IB interface capabilities.
1
I
SMU test
I
Checks the basic functions of the four SMUs.
I
3-12