EMS 5002 Operator's Manual page 15

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 12 screws, 5 on
each side panel and two at the top behind the handle.
3. The Internal Filter is located inside the analyzer (Figure 30). 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 31). 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 or with a volt meter when below 5 MV. Average O2
sensor lofe is approx. 1 year. 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 31).
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 32). Replacement intervals will
vary. A error will message will be displayed when the sensor needs to be replaced. The aver-
age life of a NOX sensor is approx. 3 years.
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 32).
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 30
Internal Filter
Maintenance
Figure 31
O2
Sensor
Oxygen Sensor
15
Figure 32
NOx
Sensor
O2
Sensor
NOx Sensor