SELF-TEST INDICATORS
The LEns on the f ront panel are used to indicate Self-Test failures by flashing at approximately 2
cycles per second when an error is detected {refer
to
Figure 171.
'!be self-Test errors are described
in the following secti�
ROM Failure
Indicates that the external
RCM
(Read Only Memory) on the M-0298 Memory Board
has
failed. This
can
be
caused by improper programming of the ROM or a partially erased or defective ROM.
CXlRRECl'IIIE PROCEWRE:
Assure that the M-0298 Memory Board is properly plugged into the unit.
If the
light continues to flash, replace the M-Q298 board.
If
this does not correct
tbe
problem, return the
PRIDE®Unit to the factory.
RAM
.Failure
Indicates that the internal microprocessor
RAM
(Random Access Memory) , external
RAM
or the M-0397
RAM
(if using the Field Adjustment
Unit)
has failed.
CXlRREcrIVE PROCEWRE:
Assure that the M-0298
(and
M-0397 if using the Field Adj ustment Unit) boards
are properly plugged into
tbe
unit.
If
the light continues to flash, replace
tbe
board or return
tbe
PRIDE
Unit to the factory for repair.
Operating
System
Failure
This failure mode indicates that the normal processing flow has been upset.
CXlRREcrIVE PROCEWRE:
Assure that the M-Q298 (and the M-0397 if using the Field Adjustment Unit) boards
are properly plugged into the unit. If the light continues to flash, replace the board or return the
uni t to
tbe
factory.
Power LOSS/Frequency Sample Failure
Signaled by a loss of zero crOSSings on the frequency measuring inp.1t to the microprocessor. caused by
extremely low voltage on the potential input, an unconnected potential input or a grossly out of
specification frequency measuremen�
CXlRREcrIVE PROCEWRE:
Assure that all potential inputs are properly connected.
Oleck to see if the
potential input fuse has blown. If the light continues to flash, return
tbe
unit to the factory.
� CAUTIOH:
Prior to applying power to the
unit,
double-check a
l
l
connections
to e n s u r e t h a t no w i r e s a r e p i n c h e d o r b r o k e n and t h a t a l l the b o a r d s a r e
plugged i n completely.
EQUIPMENT REQUIRED
1 . A Single-phase power source with frequency range variable from 55 Hz to 65 Hz
and
an accuracy of
±..O05
Hz
or better; variable voltage from 60
V rIDS to
150
V rIDS
with amplitude stability of :to.25%
or better.
2 . A Digital multimeter Hewlett-Packard 3466A or equivalent.
3 . A stopwatch or any accurate timing device.
4 . A fixed 120
V,
60 H z (or 1 2 5 , 48 o r 24
V
d e i f the
Dc
Supply is installed) , 25
W
power source for
tbe
power supply input.
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34
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