Cal, Cals, Calz, Calibration Functions - Teledyne 9110AH Instruction Manual

TELEDYNE Model 9110AH NO

5.2.2 CAL, CALS, CALZ, Calibration Functions

The calibration and zero/span checking of the M9110AH analyzer is treated in detail in Section
7, Table 7-1 summarizes types of calibration.
5.2.2.1 CAL, CALS, CALZ
The CAL, CALS, and CALZ keys control the calibration functions of the analyzer. In the CAL
mode the analyzer can be calibrated with zero/span gas coming in through the sample input port
on the rear panel. If the analyzer is equipped with the Zero/Span valve option, the CALZ and
CALS buttons operate the Zero/Span valves. The setup of this option is covered in Section 6.2,
and operation is explained in Section 7.
5.2.2.2 Zero
Pressing the ZERO key along with ENTR will cause the instrument to adjust the OFFSET value
of the internal formulas so that the instrument reads zero. The M9110AH allows zero
adjustment over a limited range of signal levels, therefore the signal does not have to be exactly
zero for the instrument to do a zero cal. The instrument will not, however, allow a zero cal on
any signal level, therefore it is not possible to zero the instrument with high concentrations of
span gas in the reaction cell. If the ZERO key does not come on as expected, check Section
9.2.9.
5.2.2.3 Span
Pressing the SPAN key along with ENTR will cause the instrument to adjust the SLOPE value
of the internal formula so the instrument displays the span value. The expected NO
span concentrations must be entered before doing a SPAN calibration. See Table 7-3.
Like the Zero calibration, the Span cal cannot be done with any concentration of span gas. If
signal level is outside certain limits the SPAN key will not be illuminated. If you encounter this
condition see Section 9.2.8. It is also possible at low levels of span concentration that BOTH the
ZERO and SPAN keys might be on, thus allowing you to either zero or span the instrument. In
this case care must be taken to perform the correct operation or the analyzer can become miss-
calibrated.
5.2.2.4 NO, NO
Before the M9110AH can be spanned, it is necessary to enter the expected span concentrations
for NO and NO
span values. The span values are entered by pressing CAL-CONC-NO or CAL-CONC-NOX
keys for NO and NO span concentrations respectively.
x
Analyzer Operator Manual, 01620, Rev. F
X
Cal Concentration
x
. In single range mode there is one value each for the NO and NO
x
5-13
and NO
x
expected
x