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002-01 / 20070227 / eb461_ts.fm
All specifications are subject to change without notice.
PRECAUTIONS
[ALL TYPES]
An extremely thin metal sheet and piezoelectric element are
used for the toner sensor detector surface. Therefore the sensor
detector surface must be handled carefully to make sure that it is
not subjected to mechanical stress.
Grounding and other measures must be considered because the
sensor circuitry and piezoelectric element can be damaged by
surges and static electricity.
[3-TERMINAL TYPE]
A ground should be connected to the case of the LTS type
during operation to prevent the case from changing potential.
[2-TERMINAL TYPE]
Make sure that the OFF time of the sensor’s power supply is at
least 1msec to prevent an internal logic error.
The length of wiring connections must be no longer that 250mm
when a separate chip is used to operate the sensor.
Please consult with TDK when using a separate chip.
RELIABILITY TESTING
Temperature storage test
The sensor must operate properly after being placed for 240 hours
in a +60°C environment.
Low temperature storage test
The sensor must operate properly after being placed for 240 hours
in a –20°C environment.
Humidity endurance test
The sensor must operate properly after being placed for 240 hours
in a +30°C, 25% relative humidity environment.
Humidity endurance test
The sensor must operate properly after being placed for 240 hours
in a +40°C, 95% relative humidity environment.
Vibration test
The sensor must operate properly after being subjected to vibra-
tion cycles in directions x, y and z for two hours in each direction; a
single cycle consisting of 10 to 55Hz vibrations with an amplitude
of 0.7mm for one minute.