Sensor
Silicon Carbide (SiC) Photodiode packaged in hermetically sealed UV glass window cap. Interference filter coating blocks most UVA from response as shown on the Spectral Sensitivity Graph.
Operation
To operate your Solarmeter, aim the sensor window located on the top panel of the meter directly at a UV source. Press and hold the push-button switch on the face of the meter. For best results take note of the distance the reading was taken from the UV source in order to ensure repeatable results. Battery operation voltage is viable from 9V down to 6.5V. Below 6.5V, the numbers on the LCD display will begin to dim, indicating the need for battery replacement. Under typical service load, a standard 9V battery will last around 2 years.
Proper Usage of Solarmeter® Ultraviolet Radiometer for Lamp Aging Tests
Wear eye protection when checking UV lamps (UV-block wrap around glasses).
Allow lamps to warm-up prior to taking readings (at least 5 min).
When checking aging of lamps, keep measuring distance and locations constant. Note: Model 5.0 (UVA + B) is best for lamp aging tests.
Lamps should be replaced when output drops 30% to about 70% of their original (new) readings. Take overall reading center of tanning bed bench pointing up with canopy closed, or check individual lamps at acrylic with canopy up. Keep track of hours vs. readings on a chart.
If unsure of what original new values were, replace two adjacent lamps with new ones of the same kind and compare to old ones.
To determine percent UVB divide Model 6.0 reading by Model 5.0 total UV (UVA + B) reading. (See FAQ page).
When checking acrylic transmission, take reading through acrylic; then remove acrylic and hold meter sensor at approximately the same distance from lamp as the acrylic shield was located. If acrylic blocks much UVB it should be replaced.
Do not subject the meter to extremes in temperature, humidity, shock or dust.
Use a dry, soft cloth to clean the instrument. Keep sensor free of oil, dirt, etc.
