Teledyne 9110E - Nitrogen Oxides Analyzer - Manual (Page 139)

Model 9110E Instruction Manual Calibration Procedures
M9110E Rev B 125
SAMPLE RANGE = 500.0 PPB NOX=X.XX
< TST TST > CAL CALZ CALS
SETUP
ZERO CAL M RANGE = 500.0 PPB X=X.XX
< TST TST > ZERO CONC
EXIT
SAMPLE RANGE TO CAL: LOW
LOW HIGH
ENTR SETUP
SAMPLE RANGE TO CAL: HIGH
LOW HIGH
ENTR SETUP
…continue Calibration
as per standard
procedure
Analyzer enters ZERO
CAL mode
Once this selection is made, the calibration/check procedure continues as described in
Sections 7.2 through 7.6. The other range may be calibrated by starting over from the main
SAMPLE display.
7.7.2. Independent Range Mode
Independent range mode is described in Section 6.5.4. When selecting span gas concentra-
tions for the NO/NO
X
or NO
2
dynamic calibrations, use concentrations around 80% of the
highest reporting range for all gases. This will produce the most accurate calibration.
The span calibration routine is only required to be performed once, unlike AUTO range
mode, which requires separate HIGH and LOW range calibrations. If the calibration data
are obtained from the RS-232 port or from the front panel display, no special changes are
necessary as the IND range mode only affects the scaling of the analog outputs.
7.7.3. Calibration With Remote Contact Closures
Contact closures for controlling calibration and calibration checks are located on the rear
panel CONTROL IN connector. Instructions for setup and use of these contacts can be
found in Section 6.8.2.
When the appropriate contacts are closed for at least 5 seconds, the instrument switches
into zero, low span or high span mode and internal zero/span valves (if installed) will be
automatically switched to the appropriate configuration. The remote calibration contact
closures may be activated in any order. It is recommended that contact closures remain
closed for at least 10 minutes to establish a reliable reading; the instrument will stay in the
selected mode for as long as the contacts remain closed.
If contact closures are used in conjunction with the analyzer’s AutoCal (Section 7.8) feature
and the AutoCal attribute CALIBRATE is enabled, the M9110E will not re-calibrate the
analyzer until the contact is opened. At this point, the new calibration values will be
recorded before the instrument returns to SAMPLE mode. If the AutoCal attribute
CALIBRATE is disabled, the instrument will return to SAMPLE mode, leaving the instru-
ment’s internal calibration variables unchanged.