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SP2065 |
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General Description |
The digital "Solar Power & Transmission Meter" incorporates two meters into one. In Power Mode, the meter measures the power per unit area of incident solar radiation reaching the meter's sensing area. In Transmission Mode, the SP2065 is able to calculate the solar transmission percentage associated with a given material. The meter uses a state of the art light sensor coupled with microprocessor control to achieve an EASY TO READ hand held meter. The device may be used to measure the solar characteristics of glass, film or other transparent materials. The SP2065 is designed to operate in either power mode or transmission mode. While operating in power mode, the SP2065 is identical to our SP1065 meter. However, when the SP2065 is switched into transmission mode, the meter self-calibrates to read 100% transmission for the current solar conditions presented to the meter. All readings thereafter are referenced against the solar conditions that were present when the self-calibration occurred. Therefore if you place a piece of glass that passes 40% of the solar energy between the meter and the light source, the display will read P 40 (i.e. 40 % solar transmission). |
Tabletop Demonstrations and QC Workstations |
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To set up a TABLETOP DEMONSTRATION, or to perform readings in a bench-type QC application, place a light source facing the SP2065. The light source should be stable and locked in position so it cannot move during the measurements. Position the meter flat on the table with the sensor facing the light source directly. If necessary, place the SP2065 on top of its box to position the meter in the center of the light beam. To obtain the most accurate results, DO NOT move the light source or the meter during the readings. To take solar transmission measurements, follow the steps below and the illustrations on the next page:
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Measuring Installed Windows |
| The best results are obtained when the meter is operated on windows inside of a building that are directly facing the sun. The position of the meter is VERY important in obtaining an accurate reading. Therefore the meter should be placed on the window sill on top of it's box or other stationary item that will hold the meter in the same position. To take a transmission reading, the meter should be self-calibrated with the window open (Step 3 & 4 above). The sensing area of the meter should NOT be looking through any glass or film at this time. In step #5 of the instructions, you should close the window without moving the position of the meter. Once the window is closed, the meter will measure the solar energy that is transmitting through the window. Several readings should be taken to guarantee the most accurate information is obtained |
Identifying Types of Coatings by Performance |
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| The solar performance of low e coatings and films vary from one manufacturer to another, as well as from product to product within the same manufacturer. By measuring the solar transmission of the glass or film with the SP2065, you can identify the type of coating you are working with (i.e. high, medium or low solar gain product, or the type from a given manufacturer). By knowing the published solar transmission value for a given coating, you can match the readings of the SP2065 and identify the coating. The high performance windows will generally have the lowest solar gain properties. If you work with several low e types from a single manufacturer, the SP2065 will allow you to identify which product you are working with, in case it is not clearly marked. This can be extremely beneficial for identifying windows already installed in the field. | |||||||||||||||||||||||||||||||||||||||||||||
| Your SP2065 meter may be equipped with a label on the back side that breaks solar performance into three categories: High, Medium and Low solar gain. Based on industry published data, EDTM has selected these categories to be separated at the 60% and 43% solar transmission levels. The resulting classifications are shown to the right----> |  |
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Helpful Operating Tips |
| 1. If taking measurements near a heat lamp, do not place the meter too close to the light source. If the end of the meter begins to feel hot to the touch, it is probably too close to the light source. Extended periods of heat exposure can cause deformation of the filters, resulting in a change in the accuracy of the meter. 2. When taking readings to measure transmission percentage, it is important that the meter is held in the exact same position for both readings taken (when possible). Any change in angle or proximity to your light source can adversely affect the accuracy of your measurements. FOR BEST RESULTS, place the meter on its box or other stationary item. To read transmission readings, slide the glass sample in front of the meter, without moving the position of the meter. This will guarantee the most accurate readings possible. 3. When performing transmission percentage readings, it is advised to take multiple readings to reduce the amount of error that occurs. Be aware that a changing light source (sun with moving clouds) will affect your transmission readings. 4. The light sensor is located at the top end of the enclosure. For the greatest accuracy in measurements, this sensor should be directly facing the light source. DO NOT alter the condition of the sensor opening by touching or pushing on the filter. Any modifications or altering of the exterior surface of the white filter WILL affect the calibration of the meter. This area should be kept clean at all times. Compressed air or a lint-free cloth should be used to clean the filter surface if it becomes soiled. 5. Do not attempt to open the enclosure. Opening the enclosure will void the product warranty and affect the calibration of the SP2065 meter. |
Calibration |
This instrument has been calibrated to detect the total incident solar power of the sun. The largest incident value of solar power is obtained when the end of the meter faces the sun directly. When the end of the meter does not face the sun, the incident solar power is reduced by the cosine curve of the angle to the sun. Make sure the transparent materials being tested are reasonably clean. This instrument is factory calibrated to a NIST (NATIONAL INSTITUTE OF STANDARDS AND TECHNOLOGY) traceable thermopile and should require no field adjustment. |
Warranty Information |
| The manufacturer warrants all models of the SP2065 to be free from defects in material and workmanship under normal use and service as specified within the operator's manual. The manufacturer shall repair or replace the unit within ninety (90) days from the original date of shipment after the unit is returned to the manufacturers factory, prepaid by the user, and the unit is disclosed to the manufacturers satisfaction, to be thus defective. This warranty shall not apply to any unit that has been repaired or altered other than by the manufacturer. The aforementioned provisions do not extend the original warranty period of the unit which has been repaired or replaced by the manufacturer. Batteries are not covered by warranty. EDTM, Inc. assumes no liability for the consequential damages of any kind through the use or misuse of the SP2065 product by the purchaser or others. No other obligations or liabilities are expressed or implied. All damage or liability claims will be limited to an amount equal to the sale price of the SP2065. |
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