PAC R6000S Operation Manual page 71

Symptom
No Response to Standard or
Sample, Continued
No High-Voltage
PAC L.P., All Rights Reserved, 2015
Probable Cause
Defective High-Voltage Supply
or Cable (Low reading on
High-Voltage PCB)
Defective 12 VDC Power
Supply, fuse or cable
(Low 12VDC)
Leaks or plugs in flow system
(low flow rates)
Furnaces not up to
temperature
Contaminated Fluorescent
Chamber or sample system
(PMT preamp output greater
than 200mv or odor from
Sulfur chamber)
High-Voltage switch is OFF
Fuse is blown
High-Voltage board is bad
High-Voltage board out of
adjustment
Shorted Preamp
Shorted high-voltage cable
R6000S Operation Manual: Rev. G
Corrective Action
Replace Cable or Power
Supply.
Replace fuse, cable or Power
Supply as necessary.
Determine source of leaks or
plugs and repair as needed.
See ""Gas Leak Testing",
Chapter 4".
See symptom "Pyro Furnace
Not Heating", previous pages.
Clean Fluorescent chamber
and sample system.
Check position of High-
Voltage switch.
Check fuses. Replace as
needed.
If 12 VDC is supplied to the
High-Voltage board, and there
is no high-voltage output (DC)
when the co-axial cable is
removed from J1 terminals 1
and 2, the high-voltage board
is bad.
Readjust high-voltage output
of PCB Adjust P2 on the high-
voltage board clockwise while
measuring the high-voltage
(DC) output on TP1(-) or
TP(+).
Voltage returns when high-
voltage cable is disconnected
from the detector module.
Replace pre-amp as needed.
Voltage returns when high-
voltage cable is disconnected
from the high-voltage board.
Replace HV Cable.
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