183 • Bump Testing GX-2012s and Gas Tracers
the ppm combustible sensor, leave the GAS 2 box deselected.
The SDM-2012 will bump test the ppm sensor using the Gas Tracer’s WET
setting for the fresh air adjustment and the span adjustment. This is not user
adjustable using the PC Controller Program. If the SDM-2012 is not in a fresh
air environment, a zero air cylinder must be used with a 6 inch humidifier tube
connecting the cylinder to the AIR fitting. Another 6 inch humidifier tube or a
humidifier tube manifold must always be used to connect the calibration gas
cylinder to the GAS 2 fitting. If you need to perform a DRY bump test for any
reason, it must be done away from the SDM-2012. See the Gas Tracer
Operator’s Manual for a description of the DRY and WET settings for bump
testing and calibration.
Figure 144: Gas Order Confirmation Screen, Standard Instruments