Advertisement
Symptom
Shitter was closed or requested
to close but receiver signal
higher than expected
Low Open Safe Volts
Symptom
Shitter was open or requested to
open but the receiver voltage
was below threshold
Bad Standardize
Symptom
Flag to air ratio drift is out of
limit
Background volt out of limit
Non-alarm based troubleshooting for 4202 Source 12 Basis Weight sensor model
Source component
Component
Source
Flag / Flag solenoid Route flag into
Possible cause
Receiver amplifier failed
Shutter did not close
Shutter close time too slow
Possible cause
Shutter did not open due to EDAQ
hardware failure
Shutter did open due to broken
fuse on PMP
Receiver module not functioning
Shutter did not open due to
mechanical issues (air, power)
Possible cause
Excessive dirt on sensor
Broken flag
Bad ion chamber
Low air pressure
Function
inserted or retracted
position
Power Req's
20 – 26 VDC
Solutin
Check receiver voltage , change
amplifier
Check shutter operation, make
sure nothing block the shutter
Solenoid issue
Solutin
Replace EDAQ
Check fuse on shutter command
on UPMP
Check receiver voltages
Verify shutter operation, check air
pressure, check red lamp
Solutin
Inspect head gap and clean
Inspect flag operation and
condition
Replace basis weight ion chamber
Verify shutter operation
Tests
Failure modes
1. Flag may
tear
2. Flag may
become bent
and jam
Advertisement
