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9) OXYGEN REF: Many environmental regulations require that the
concentrations of pollutants measured, be corrected to some reference value of
oxygen other than the actual concentration at the time of the measurement.
Typical oxygen reference values are 0% (air free), 3%, 7% or 15%. To select
the desired oxygen reference value, press the SHIFT key repeatedly until the
blinking cursor is located on the OXYG REF line on the display, as described
above. Toggle the UP or DOWN button, until the desired value of the reference
oxygen is displayed. (Range is 0-20% in 1% increments). Then press the
ENTER key. To return to uncorrected measurements, press the UP button until
the display reads:
OXYGEN REF: TRUE
NOTE: Setting the OXYGEN REF to a value other than TRUE affects
values of emissions concentrations in PPM and MGM. It does not affect
values in #/B or GBH!
10) THERMAL EFF: Selects the thermal efficiency of the engine. See MEAS.
UNITS above.
11) AMB T OFFSET: Sets the value, in °C, to add or subtract to the measured
ambient temperature.
12) DISPLAY VOLT: Selects for maintenance and troubleshooting purposes,
whether the sensor amplified output voltages will be displayed or not. Default
setting is NO. If set to YES, voltages will appear on DATA SCREEN 4.
B. SPAN MENU
The SPAN MENU lets you set span calibration values for
each sensor and performs all sensor calibrations. The
SPAN MENU is shown below.
1) ____ SPAN: The first six lines of the SPAN MENU are
used for carrying out span calibrations of the CO, NO,
NO
2, SO2, combustibles, and stack draft sensors. For
detailed use of these settings, please refer to the chapter
on calibration.
2) ZERO TIME: If you wish to change the countdown time for autozeroing the
analyzer, press the UP or DOWN keys accordingly, when the cursor is blinking
** SPAN MENU **
CO Span: 200PPM
NO Span: 200PPM
NO2 Span: 200PPM
SO2 Span: 200PPM
Comb Span: 1.0%
Draft Span: 10
"
Zero Time: 60sec
Span Time:120sec
Calib History
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