UVP UVX Radiometer - Manual (Page 19)

UVX Radiometer 19
the actual time that a sensor will remain within tolerance is dependent on such factors as care in handling
and total dosage of radiation on the sensor filters (refer to “Solarization of Filters” in this manual).
Sensor Maintenance
The user should avoid performing corrective maintenance on the sensor. If required, the UVX Sensor
should be returned to the factory.
Care of Sensor Case
CAUTION: Do not use abrasive cleaners on any part of the UVX Series Sensors or allow water to get
inside the sensor.
The case of the UVX sensors is fabricated from a durable ABS plastic. As with all plastics, solvents
should not be used in cleaning of the case. A high quality plastic cleaner or mild soap and water may be
clean fingerprints, dust or dirt from the case. The contacts on the cable connector should not require
attention.
Care of the Sensor Window
Dirt, dust or fingerprints on the sensor window will cause inaccurate readings. To ensure accurate
readings, it is essential that the sensor window be kept clean. There are several ways of ensuring
cleanliness. To remove dust or dirt, use a lens tissue or a cotton swab. To remove fingerprints, use a lens
tissue or lint-free cloth moistened with alcohol. A high purity alcohol will ensure that no residue remains
after the cleaning procedure.
General Precautions
Handling
The UVX Series Sensors, although rugged, should be protected from physical shocks, moisture and
extremes of temperature.
Sensor Exposure
The sensors have been designed for minimum solarization effect as described elsewhere in this manual.
However, it is suggested that the sensor be exposed to ultraviolet radiation only for the amount of time
necessary to actually make a measurement. Excessive exposure may reduce the time between
recalibrations.
Sensor Continuity Measurements
When an ohmmeter is used to check continuity of the sensor, be careful not to use a meter that applies
more than 2 volts to the circuit. This is especially important when measuring continuity of the radiation
sensor itself; i.e., between the ring and sleeve of the connector. (See schematic, Figure 10).