Description
- Measuring the current UV index
- Measuring the intensity of the sun in the form of the UV index
- Tracking the UV index over time
- Measuring UV lamp intensity and ageing
| Model: | 6.5 |
| Output range: | 0-199.9 UV Index |
| Measurement range: | 280-400 nm Diffey Erythemal Action Spectrum |
| Resolution: | 0.1 UV Index |
| Conversion speed: | 3.0 displays /Sek. |
| Display: | 3.5-digit LCD |
| Digit size: | 10,2 mm high |
| Operating temperature: | 0°C – 37,8°C |
| Operating humidity: | 5% – 80% |
| Accuracy: | ±10% REF.NIST |
| Dimensions: | L: 61 x W: 22 x H: 108 mm |
| Weight: | 150 g |
| Operating Voltage: | 9 V (Block Battery) |
| Lens: | UV Glas |
| Diffusor: | Teflon |
Sensor:
The sensor consists of a silicon carbide (SiC) photodiode. This is located under UV glass with a hermetically sealed Eeff filter (erythema effective) and diffuser cap.
Operating/using the meter:
To operate the Solarmeter® , point the sensor window on the top of the meter in front of your body (perpendicular to the flat ground) towards the sky. Press and hold the pressure switch on the front of the device. The displayed value represents the current UV index.
The highest UVI values typically occur when the sky is deep blue and sometimes when the sun is between scattered white “wispy” clouds. Take extra care in these conditions to avoid the risk of sunburn.
Note that different cloud and haze conditions reduce the UV index. Take frequent readings in partly cloudy conditions and average clear and cloudy readings to determine the actual UV index. Be careful in hazy or slightly cloudy conditions, because although direct UV radiation is lower than in clear skies, diffuse UV radiation can be higher, as you can see by pointing the meter in different directions.
The battery operating voltage is adjustable from 9 V down to 6.5 V. Below 6.5 V, the numbers on the LCD display begin to fade, indicating the need for a battery replacement. With typical usage, a standard 9V battery lasts about 2 years.
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Skin type
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Typical characteristics
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Tanning ability
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I
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Pale white skin, blue/hazel eyes, blonde/red hair | Always burns, does not brown |
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II
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Light skin, blue eyes | Burns easily, browns badly |
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III
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Darker white skin | Browning after initial burning |
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IV
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Light brown skin | Burns minimally, browns slightly |
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V
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Brown skin | Rarely burns, turns dark quickly |
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VI
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Dark brown or black skin | Never burns, always tans dark |
For untanned type II skin, the time to onset of sunburn, a minimum erythematic dose (MED) at 210 J/m² per MED, can be calculated from the UV index value as follows:
Divide the UVI value by 2.33 to obtain MED/hr. Then divide MED/hr by 60 minutes.
Example for a UVI value of 8.5: 8.5 : 2.33 = 3.65 MED/hour. Then 60 : 3.65 = 16.4 minutes.
Care and maintenance:
- Do not expose the measuring device to extreme temperatures, moisture, shocks or dust. If the device is accidentally exposed to excessive humidity or wet conditions, unusually high readings may occur. If you allow the device to dry naturally or place it in a bag with silica gel, normal function will be restored.
- Use a very soft cloth to clean the meter. Keep the sensor free from oil, dirt, etc.
