Teledyne 4020 – Hydrocarbon analyzer (special version for automatic background gas switching) - Manual (Page 85)

Total Hydrocarbon Analyzer Maintenance
Teledyne Analytical Instruments 67
Maintenance & Troubleshooting
WARNING: DANGEROUS HIGH VOLTAGES EXIST INSIDE THIS
INSTRUMENT.
THERE ARE NO USER SERVICEABLE PARTS
WITHIN THE COVER ON THE INSIDE OF THE DOOR,
INSIDE THE ISOTHERMAL CHAMBER, (SAMPLE
SYSTEM), AND ON THE ELECTROMETER-
AMPLIFIER PC BOARD. WORK IN THESE AREAS
MUST BE PERFORMED BY AUTHORIZED AND
TRAINED PERSONNEL ONLY.
BEFORE STARTING ANY OF THESE MAINTENANCE
AND TROUBLESHOOTING PROCEDURES, READ THE
CAUTIONS AND WARNINGS INCLUDED IN THE
SECTION TITLED “ADDITIONAL SAFETY WARNINGS”.
PAY SPECIFIC ATTENTION TO THE PROCEDURES
FOR REMOVAL OF INTERNAL INACCESSIBLE SHOCK
HAZARDS. IF THE INSTRUMENT MUST BE TURNED
ON DURING ANY OF THESE MAINTENANCE AND
TROUBLESHOOTING PROCEDURES, BE CAREFUL
AND WORK WITH THE ONE HAND RULE:
Work with one hand only.
Keep the other hand free without
contacting any other object. This reduces
the possibility of a ground path through
the body in case of accidental contact
with hazardous voltages.
CAUTION: MANY OF THE ELECTRICAL PARTS WITHIN THE
MODEL 4020 ARE SUSCEPTIBLE TO DAMAGE
FROM ELECTROSTATIC DISCHARGE (ESD). USE
ESD SAFE PROCEDURES WHEN HANDLING OR
WORKING WITH ELECTRONIC COMPONENTS
.
If the analyzer is suspected of incorrect operation, always evaluate
performance with zero or span gas flowing in the sample path. Never