Instruction manual

NGA 2000 MLT Hardware
TROUBLESHOOTING
10 - 7
Emerson Process Management GmbH & Co. OHG
Instruction Manual
90002929
07/2006
CALIBRATION NOT POSSIBLE
10.5 Calibration not possible
Possible Causes Check / Correct
a) Incorrect nominal value of span gas Enter the correct nominal value
(certification of span gas bottle)
(see software manual)
b) Incorrect zero gas / span gas in use. Check zero gas / test gas in use
c) Tolerance error. Switch off tolerance check before starting a
calibration (see software manual)
d) Incorrect physical zero point Check and adjust physical zero point alignment
(see Section 17.5 / 11.1.6)
.
e) Contamination of the gas paths Check if photometric components are dirty,
clean or replace the components if necessary
(cf. Section 17.).
Check and adjust physical zero point alignment
(see Section 17.5 / 11.1.6)