Calibrating an Instrument with Special Sensors • 60
•
To start another calibration, press and release the CAL
button.
•
To perform a bump test, press and release the BUMP
button.
12. 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 calibration parameter.
13. The SDM-E2 will perform a fresh air adjustment on the instrument.
•
If the air adjustment is successful, the SDM-E2 will continue as described
in step 14 below.
•
If one or more of the sensors fails the fresh air adjustment, the SDM-E2 will
abort the calibration and will not apply calibration gas. If this happens, the
CAL
LED will flash red indicating a failure and the following screen will
appear.
In this case, continue with step 22.
14. The SDM-E2 will apply GAS 1 calibration gas to the instrument for the time
defined by the GAS TIME calibration parameter and first calibrate the standard
four sensors.
The “C” indicates calibration gas is being applied. The gas readings for the fifth
and sixth channels will be replaced by dashes since they are not being
calibrated yet.
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
CH4 29%LEL C
OXY 18.0vol% C
H2S 25.0ppm C
CO 45ppm C
CO2 ---------
NH3 ---------
