Teledyne M300EM User Manual
Teledyne API – Technical Manual - Model 300E Family CO Analyzers
Calibration Procedures
205
9.6. CALIBRATION OF THE M300E/EM’S ELECTRONIC
SUBSYSTEMS
9.6.1. DARK CALIBRATION TEST
The dark calibration test interrupts the signal path between the IR photo-detector and the remainder of the
sync/demod board circuitry. This allows the instrument to compensate for any voltage levels inherent in the
sync/demod circuitry that might effect the calculation of CO concentration.
sync/demod board circuitry. This allows the instrument to compensate for any voltage levels inherent in the
sync/demod circuitry that might effect the calculation of CO concentration.
Performing this calibration returns two offset voltages, one for CO MEAS and one for CO REF that are
automatically added to the CPU’s calculation routine. The two offset voltages from the last calibration procedure
may be reviewed by the user via the front panel display.
automatically added to the CPU’s calculation routine. The two offset voltages from the last calibration procedure
may be reviewed by the user via the front panel display.
To activate the dark calibration procedure or review the results of a previous calibration, press:
Offset for CO REF signal
SAMPLE
RANGE=50.0 PPM CO= XX.XX
<TST
TST> CAL
SETUP
SETUP X.X
SECONDARY SETUP MENU
COMM VARS
DIAG
EXIT
SETUP X.X
PRIMARY SETUP MENU
CFG DAS RNGE PASS CLK
MORE
EXIT
DIAG
SIGNAL I/O
PREV
NEXT
ENTR
EXIT
SETUP X.X
ENTER PASSWORD
8
1
8
ENTR
EXIT
Continue pressing NEXT until ...
DIAG OPTIC
DARK CALIBRATION
PREV NEXT
ENTR
EXIT
DIAG DARK
CO DARK CALIBRATION
VIEW
CAL
EXIT
DIAG DARK
REF DARK OFFSET: 0.0mV
EXIT
Offset for CO MEAS signal
DIAG DARK
MEAS DARK OFFSET: 0.0mV
EXIT
DIAG DARK
DARK CAL 1% COMPLETE
EXIT
DIAG DARK
DARK CALIBRATION ABORTED
EXIT
Calibration runs automatically
04288D DCN5752