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T400 Ozone Analyzer Operator’s Manual T400 Calibration Procedures
193
9.3.3. MANUAL CALIBRATION USING VALVE OPTIONS
Note While the internal Zero Span Option is a convenient tool for performing
Calibration Checks, its O
3
generator is not stable enough to be used as a
source of Zero Air or Span Gas for calibrating the instrument.
Calibrations should ONLY be performed using external sources of Zero
Air and Span Gas whose accuracy is traceable to EPA or NIST standards.
On instruments with Z/S valve options, zero air and span gas is supplied to the analyzer
through the zero gas and span gas inlets (see Figure 9-2 and the zero and cal operations
are initiated directly and i
ndependently with dedicated buttons (CALZ & CALS).
9.3.3.1. Setting the Expected O
3
Span Gas Concentration with the Z/S Option Installed
SAMPLE RANGE=500.0 PPB O3= XXXX
<TST TST> CAL CALZ CALS SETUP
SAMPLE RANGE=500.0 PPB O3= XXXX
<TST TST> ZERO CONC SETUP
SAMPLE O3 SPAN CONC: 400.0 Conc
0 0 4 0 0 .0 ENTR EXIT
The O
3
span concentration value automatically
defaults to 400.0 Conc.
Make sure that you input the ACTUAL
concentration value of the SPAN Gas.
To change this value to meet the actual
concentration of the SPAN Gas, enter the number
sequence by pressing the button under each digit
until the expected value is set.
EXIT discards the new
setting
ENTR accepts the
new setting
06870C DCN6332