User`s guide
M3000A/M3046A/M3015A/M3016A Service Guide
5-16 Troubleshooting the Instrument
CO
2
OCCLUSION
(M3015A)
1. The FilterLine or exhaust
tube is blocked to the extent
that a measurement sample
cannot be taken, or
2. The outlet is occluded at
Power On
3. This INOP also appears after
the Pump Op Time is reset.
1. and 2.Check the FilterLine
and exhaust tube, then discon-
nect and reconnect the Filter-
Line. If the INOP is still
diplayed, use a new FilterLine.
3. If Pump Op Time has been
reset, perform a flow check
and store the flow in Service
Mode (select “Store Flow”).
CO
2
OVERRANGE
(M3015A)
The CO
2
value is outside the
measurement range.
CO
2
AUTOZERO An AutoZero is in progress.
An AutoZero will be done at
the following intervals: 5 min-
utes after connecting the Filter-
Line, 1 hour later, 12 hours
later, and every 12 hours from
there on.
CO
2
PURGING The Measurement Extension is
purging the FilterLine. This
occurs when an occlusion is
detected in the line or airway
adapter. If the occlusion is not
removed by purging, the Meas-
urement Extension will go into
Standby Mode and a “CO
2
OCCLUSION” INOP will be
displayed.
Check for an occlusion and
remove.
If necessary, replace the Filter-
Line.
NO CENTRAL MONI-
TORING
Central monitoring has been
interrupted.
With a wireless network:
Check that the Monitor has not
been moved out-of-range of an
access point and that no micro-
wave oven or other non-moni-
toring wireless device is
interfering with the Monitor.