Ohmart Vega W-4510, Technical Reference Hardware Manual

Page: 140 / 162

Diagnostics and repair
W-4510 Weigh Scale Technical Reference Manual 123
LED summary table
Table 21: Power supply board LED summary table
LED Description Normal condition Error condition Recommendation
+6V +6V DC voltage level
to electronics
ON OFF—Electronics are not
rec6VDC voltage
required for functioning
6V on test points.
Check fuse on Power Supply
board. Check power input
terminals 1, 2.
+24V Not used
Relay Not used
Table 22: CPU board LED summary table
LED Description Normal condition Error condition Recommendation
Mem Not used N/A N/A
HART Not used ON N/A
CPU Central processing
unit on CPU board
“heartbeat”
Blinks at rate of
1time/sec.
LED does not blink. CPU
not functioning.
Check power input. Replace
CPU board.
Aux Auxiliary input
frequency signal
indicator
Blinks if auxiliary
input present. OFF—
if no auxiliary input
present.
None
Check auxiliary input wiring
terminals 11 & 12 with a meter
for frequency signal. Check
auxiliary input equipment.
HV Not used N/A N/A
Field Radiation field
indicator
Cycles in proportion
to radiation field
intensity at detector.
ON for 10sec. for
each mR/hr, then off
for two seconds.
(Can use LED 5 that
blinks 1time/sec to
time LED 9 for field
indicator.)
None
A 1mR/hr (2,580nC/kg/hr) field
is usually required for a
measurement. Check for closed
source shutter, buildup, and
insulation.