Bump Testing an Instrument with Special Sensors • 46
•
To perform a calibration, press and release the CAL
button.
13. The “Z” to the right of the gas reading indicates that air is being applied to the
instrument for a fresh air adjustment (zero). The SDM-E2 will apply fresh air to
the instrument for the time defined by the AIR TIME bump test parameter.
14. The SDM-E2 will perform a fresh air adjustment on the instrument.
•
If the air adjustment is successful, the SDM-E2 will indicate that all
channels passed and continue as described in step 15 below.
•
If one or more of the sensors fails the fresh air adjustment, the SDM-E2 will
abort the bump test and will not apply calibration gas. If this happens, the
BUMP
LED will flash red indicating a failure and the following screen will
appear indicating which channels passed and failed the fresh air
adjustment with a P (pass) or an F (fail) to the right of the “Z”. The “Z”
indicates it is a fresh air adjustment (zero) result. In the following example,
the H
2
S channel failed the zero adjustment.
In this case, continue to step 18.
CH4 0%LEL Z P
OXY 20.9vol% Z P
H2S 0.0ppm Z P
CO 0ppm Z P
CO2 0ppm Z P
NH3 0.0ppm Z P
CH4 0%LEL Z P
OXY 20.9vol% Z P
H2S 0.0ppm Z F
CO 0ppm Z P
CO2 0ppm Z P
NH3 0.0ppm Z P
