4-5 Gas Selection; Leak Check Screen - EMS 5003 Operator's Manual

The Gas Analyzer will be set up for 4 or 5 gas operation at the time of purchase. The 4 gas unit
displays HC,CO,CO2, O2, AFR and LAMBDA and the 5 gas unit has HC,CO,CO2, O2, NOX, AFR
and LAMBDA. The unit would not need to be changed by the customer. To choose 4-5 gas go to
the menu screen and press 5 or 4 gas button , then choose the 5 or 4 gas button (Figure 28).
Return to the Home screen and the display will indicate 4 or 5 gas in the setting window.
LEAK CHECK SELECTION
The Gas Analyzer needs to be checked occasionally for LEAKS. O2 leaks can cause gas read-
ings to be off or not read at all. Leak Check should be performed after every filter change out to
insure no O2 leaks causing invalid gas readings. To perform a Leak Check press the menu button
on the Home screen and press the leak check button on the Menu screen . This brings you to the
leak check screen (Figure 29) Leak Check duration is 30 Sec.
Plug the inlet quick connector on the analyzer with a rubber cap for an internal leak check. The
model 5003 will show LOW FLOW : Yes/No on the screen and the pumps will shut off, press the
Test button to start the 30 sec. leak check. If the pumps stay off the duration of the test, there are
no leaks and the test status will indicate pass/fail.·
Leak Check your sample hose and probe every filter change out only after you have verified no
internal instrument leaks. Connect the sample hose to the analyzer and plug the end of the
probe with the red/black plastic cap supplied by EMS. The same low flow codes will come up
as described above and the low flow should hold for the duration of the test. If a leak is de-
tected, meaning the pumps turn back on losing vacuum, the most common leak is at the external
filter bowl connection. This can be verified by using a butane lighter opening raw butane next to
the filter head, your HC reading will spike if there is a leak. You should also check all threaded
connections and hose connections including tie straps, twisting to ensure a seal.

4-5 GAS SELECTION

Figure 28
Figure 29
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