EMS 5001 Operator's Manual page 13

Internal Analyzer Maintenance:
The maintenance items discussed below are located inside the analyzer. The outside
cover will need to be removed to gain access. The cover is held in place with 11 screws, 5 on
each side panel and one at the top behind the handle.
3. The Internal Filter is located inside the analyzer (Figure 17). This filter is designed to
catch particles missed by the External Filter. The replacement interval varies, but a good
starting point, is replacing the filter every other time you replace the External Filter. Note: This
filter is directional, check the arrow on the filter.
4. Oxygen Sensor should be replaced as required (Figure 18). Replacement intervals
will vary, but the average life-cycle is 9 to 12 months. A fault code will flash when the sensor
needs to be replaced, the analyzer cannot be used until the sensor is replaced. To avoid
unexpected down time, the O2 sensor display can be monitored, if the reading drops below
17.0% the O2 sensor should be replaced. The oxygen sensor is located inside the analyzer.
a. Remove the analyzer cover. Note: The power should be disconnected prior to
cover removal. The sensor is located at the left rear of the analyzer (Figure 18).
b. Disconnect the two wire connector from the sensor. Rotate the sensor
counter-clockwise.
c. Install the new sensor, rotate clockwise until the o-ring seats. Re-connect the
two wire connector. Replace the cover and power the analyzer. No additional
steps are required.
5. NOx Sensor should be replaced as required (Figure 19). Replacement intervals will
vary. A fault code will flash when the sensor needs to be replaced.
a. Remove the analyzer cover. Note: The power should be disconnected prior to
cover removal. The sensor is located at the left rear of the analyzer (Figure 19).
b. Disconnect the four wire connector from the sensor. Rotate the sensor
counter-clockwise.
c. Install the new sensor, rotate clockwise until the o-ring seats. Re-connect the
four wire connector. Replace cover and power the analyzer. No additional steps
are required.
Figure 17
Internal Filter
Maintenance
Figure 18
O2
Sensor
Oxygen Sensor
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Figure 19
NOx
Sensor
O2
Sensor
NOx Sensor