9.5.3
SPAN test according to EPA Guidelines
Submenu item "SPAN Test" serves to perform the zero adjust and the sensitivity test
according to the EPA Guidlines.
NOTICE
This SPAN test is only possible with a GPP measuring probe.
NOTICE
The SPAN test must be performed in a "Zero Path" duct.
Zero Path: Duct with a CO concentration = 0.
1
The test is activated by pressing "Enter" in menu item "EPA Span Test". It can also
be started with a binary signal. Making entries during the process or aborting are
not possible.
2
The display switches to the measuring mode screen. The status indicator is "Span
Test".
3
The test relay is activated.
4
The humidity correction is deactivated because the test gases do not contain any
humidity.
5
Deviations of the SPAN test value against the expected value can be adjusted in
submenu item "SPAN Parameter",
see "Changing the calibration values", page 64
6
Calculating the SPAN value to be set:
b
Actual value (test gas concentration) : value displayed.
7
If the SPAN parameter is already set to value 1, the SPAN value to be set must be
calculated differently:
b
Actual value (test gas concentration) x value displayed.
8
Deviations of the zero point can be adjusted in submenu item "ZERO",
ing the calibration values", page 64
.
9
Recommendation: Perform zero adjust.
10 The EPA SPAN test is terminated using the "Left arrow" or "meas" button.
back
Calibration
Zero Adjust
Span Test
EPA Span Test
cal
Measuring
T=150 °C
SPAN Test
T=150°C
0
1000
CO
564
ppm
Figure 58: Performing a manual SPAN test
9
MENUS
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O P E R A T I N G I N S T R U C T I O N S | GM901-02
8008932/16YT/V4-0/2022-02 | SICK
Subject to change without notice
