EMS 5002 Operator's Manual page 20

Moisture is your BIGGEST enemy for this instrument life! If any moisture build up is
visible in the analyzer clear hoses, allow the instrument to dry out by running ambi-
ent air through the analyzer continuously for a minimum of 30 minutes or until NO
moisture is present in the hoses.
· Sample Hose and S.S. probe should be blown out with compressed air at the end
of the day. Moisture build up will leave carbon build up inside the hose and deterio-
rate the hose causing leaks. Clean sample hose once or twice a year by soaking in
hot soapy water, blow out with compressed air.
· Leak Check should be performed after every filter change out to insure no O2 leaks
causing invalid gas readings. Plug the inlet quick connector on the analyzer for an
internal leak check. The model 5002 will show LOW FLOW on the screen and the
pumps will shut off, and if the pumps stay off 30 seconds there are no leaks.
· 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 30 seconds.
· Leak check failures would be if the 5002 model pumps turn on during the 30 sec-
onds. The most common leak location is at the external filter head, this can be
check with a butane lighter to see if your HC reading increases. Make sure the filter
is screwed on straight and the O-Ring is moistened. If the leak is at the internal
filter, twist the filter in the hose and make sure zip tie is tight or replace. If a leak is
found in the sample hose or probe, ORDER NEW parts. Sample Hose part #:
EMS-5096-25, Handle part #: EMS-5097, S.S. Probe part #: EMS-5098.
· Two Cycle gasoline testing: Two cycle fuel is much more of a maintenance issue
than standard gasoline or diesel testing. In order to determine a good maintenance
schedule, check the filters once a week with a visual inspection. If a yellowish build
up in the external filter is present, this is oil contamination, and will possibly give you
inaccurate readings due to HC residual build up. This would be seen after ZERO-
ING the unit, and HC readings being displayed without taking an exhaust sample.
This would indicate filter change out is required. For the pre-filter water trap sin-
tered bronze filter, any yellowish or oil build up would require cleaning with hot
soapy water. Make notes of how many tests have been preformed so you can get a
bench mark for your filter change out or cleaning. If you are not changing out and
cleaning the filters, this could result in a bench failure due to oil contamination build
up inside the IR bench. Also be careful of how long you sample this exhaust. A
longer test can result in contamination, so only allow the unit to sample as long as
needed, and afterwards, always allow the unit to purge out any contamination by
running fresh air for as long as possible, or a minimum of 15 minutes or auto shut
down in stand by mode. This is the best thing to do after sampling any engine and
will prolong the analyzer component life.
Maintenance
20