81 • Bump Testing a Gas Tracer
9.
You will then be asked to confirm the auto calibration values and the
instruments that the calibration cylinder will be used for. Be sure the auto
calibration values match the values listed on the calibration cylinder. The serial
number and gas combination of all selected instruments will appear
sequentially beneath the gas cylinder concentrations. If you are bump testing a
standard Gas Tracer or Gas Tracers (catalytic LEL, ppm combustible, O
2
, and
CO), the screen will appear as shown below. The ppm sensor will be bump
tested first with GAS 2 and then the remaining 3 sensors will be bump tested
with GAS 1. The GAS 2 selection box is deselected by default. You must select
the GAS 2 box if you wish to bump test the ppm combustible sensor. If you do
not wish to bump test 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 gas application. 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 62: Gas Order Confirmation Screen, Standard Gas Tracer