![background image](http://html1.mh-extra.com/html/racal-instruments/1261b/1261b_user-manual_3120226061.webp)
1261B User Manual
Operating The 1261B 3-8
Racal Instruments
Ó
1995
Monitoring
Basics
Refer to
Figures 3-1 to 3-4
while using
Table 3-1
to interpret
system monitor information. This section applies to basic features
common to the Standard (SMS) and Enhanced (EMS) Monitoring
Systems. See
Section 4 Using The Enhanced Monitor
for
additional EMS capabilities. Refer to Section 7
Troubleshooting
if
a LED indicator or display message in the
“What You See On
The Front Panel”
column is other than the color Green or the
message “System OK”.
Table 3-1, Monitoring Basics
WHAT YOU SEE
ON THE FRONT
PANEL
WHAT IT MEANS
WHERE TO VERIFY
Voltage LED
Green
or
“System OK”
·
VXI Voltages are within acceptable
limits
+4.56V
#
+5V Rail
#
+5.50V
+10.95V
#
+12V Rail
#
+13.20V
+21.90V
#
+24V Rail
#
+26.40V
-2.20V
#
-2V Rail
#
-1.83V
-5.72V
#
-5.2V Rail
#
-4.75V
-13.20V
#
-12V Rail
#
-10.95V
-26.40V
#
-24V Rail
#
-21.90V
·
At rear panel connector J415
J415 Pin 11
J415 Pin 17
J415 Pin 16
J415 Pin 3
J415 Pin 8
J415 Pin 15
J415 Pin 1
Use J415 Pin 2, 4, 14, or 24 as
Ground reference.
Current LED
Green
or
“System OK”
·
Current draw from each of the seven
VXI voltage supplies is
#
100% of the
rated value
+5V Rail
#
80Amps
+12V Rail
#
17Amps
+24V Rail
#
12Amps
-2V Rail
#
30Amps
-5.2V Rail
#
60Amps
-12V Rail
#
17Amps
-24V Rail
#
12Amps
·
At rear panel connector J415.
These signals are scaled
such that 0V reading = 0%
full rated current, and 5V =
100% full rated current.
J415 Pin 21
J415 Pin 18
J415 Pin 5
J415 Pin 7
J415 Pin 20
J415 Pin 6
J415 Pin 19
Use J415 Pin 2, 4, 14 or 24 as
Ground reference.
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com