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Operation
Service Menu
Detector Calibration
Intensity Check
3-86
Model 49i Instruction Manual
BENCH LAMP SETTING:
CELL A INT:
CELL B INT:
LAMP SETTING:
RANGE
AVG
The Detector Calibration screen is used to set the calibration factors for
detector A and detector B. Calibration factors are computed so that both
detectors read 100,000 Hz on zero air. If either detector reads lower than
75,000 Hz or higher than 125,000 Hz, this calibration will not be
successful. It is crucial that the lamp intensity be set such that both detector
intensities fall inside this range before performing this calibration.
Note This adjustment should only be performed by an instrument service
technician.
•
In the Main Menu, choose Service > Detector Calibration.
DETECTOR CALIBRAITON:
CELL A RAW INT: 76988 HZ
CELL B RAW INT: 67079 HZ
CELL A FACTOR: 1.000
CELL B FACTOR: 1.000
CALC/SAVE NEW RECORDS
RANGE
AVG
The Intensity Check menu is used to manually control the flow of reference
or sample gas through either Cell A or Cell B. This enables the intensity and
noise reading of each detector to be determined with either reference or
sample gas flow. Selecting any of these menu items will disturb the analog
outputs.
•
In the Main Menu, choose Service > Intensity Check.
98425 Hz
97465 Hz
72.9 %
INC/DEC
SAVE VALUE
DIAGS ALARM
DIAGS ALARM
Thermo Fisher Scientific
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