RKI Instruments SDM-2012 Standalone Configuration - Manual (Page 69)

Bump Testing a Gas Tracer • 64
NOTE: GAS 2 calibration gas will continue to be applied so that the total gas
application time is the time defined by the GAS TIME calibration
parameter. This time includes the time that the instrument was being
bump tested. If the GAS TIME calibration parameter is set to 90
seconds and the GAS TIME bump test parameter is set to 30
seconds, the instrument will sample gas for an additional 60 seconds if
the bump test fails to bring the total exposure time to 90 seconds.
21. The SDM-2012 will then apply fresh air to the standard three sensors and
%volume sensor (if installed and if the GAS menu item in Edit Mode is set to
ALL) for the time defined by the AIR TIME bump test parameter.
22. The SDM-2012 will perform a fresh air adjustment on the standard three
sensors and %volume sensor (if installed and if the GAS menu item in Edit
Mode is set to ALL).
• If the air adjustment is successful, the SDM-2012 will continue as
described in step 23 below.
• If one or more of the sensors fails the fresh air adjustment, the SDM-2012
will abort the bump test and will not apply calibration gas. If this happens,
the BUMP
T
LED will flash red indicating a failure and the Gas Tracer will
alternate between the following screens. Use the EDIT ENTER button to
scroll between the fresh air adjustment results for the standard three
sensors and the bump test or bump test and calibration results for the ppm
9800
ppm
CH
4
B/CAL G2
0
20.9
0
%
ppm
CH
4
O
2
CO
BUMP AIR
%LEL
0
20.9
0
%
ppm
CH
4
O
2
CO
BUMP AIR
vol%
%LEL
Standard Gas Tracer or GAS %Volume Sensor Installed and GAS
menu item in Edit Mode set to Std menu item in Edit Mode set to ALL