YOKOGAWA EML500 Series, User Manual, Page: 36 / 85

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IM80B80T10E 21th Edition : Jul.1,2007-00
< 5.MAINTENANCE >
5. MAINTENANCE
The EML500 has been strictly adjusted during the production process. Furthermore, the use of
highly integrated circuits has eliminated moving parts; thus ensuring greater reliability. However,
daily inspection and periodic maintenance are necessary for accurate and stable operation of the
system.
5.1 Daily Inspection
Inspection Item Description
Dimmer Check the dimmer function.
Speed indicator Check that the reading of the speed indicator is identical to the speed
on the master indicator.
Distance display Check the displayed distance with respect to the speed display.
Error indicator Check that there is no error indicated in the master unit.
Lamp test Do the lamp test to check the lighting of the LEDs.
5.2 Periodic Inspection
Inspection Item Description Frequency of Inspection
Sensor Check for contamination on the electrodes in
the sensor, and clean it off.
Once every three months
Check the wiring connections. Every year
Check the connector. Every year
Master indicator Check the display and individual LEDs. Once every 6 months
Check the speed using test output Once every 6 months
Speed indicator Check the lighting. Once every 6 months
Note: Refer to Section 6.4(1) for cleaning the electrode.
CAUTION
Do not use a megger for inspection purposes except for on board power supply terminals.
Otherwise, the equipment may be damaged.
NOTE
If there are contaminants or microorganisms adhering to or around the sensor electrode, the speed
cannot be measured accurately. The tip of the sensor must be kept clean.