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SG2700 |
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General Description |
The Strengthened / Tempered Glass Detector identifies if a piece of glass or a window has been strengthened. It also will identify the thickness of the first pane of glass. |
Features |
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• Single or double pane testing accomplished from a single side • Test single panes of glass or double pane windows in the production environment • Test single or double pane windows that are already installed in the field • Wide viewing area illuminated by multiple light sources • Pane 1 glass thickness measurement • Head-on viewing of reflections for easy measurement • Special viewing optics to accentuate the color changes • Identify the location of stress lines in the glass • Automatic power-off feature to prolong the life of the battery • Low power usage allows for standard 9-volt alkaline battery operation • Low Battery Indicator • Simple operation • Convenient push-on/push-off power switch with improved button-guard design • Small, portable convenient size • Protective carrying case |
Important Information about Strengthened Glass |
ASTM C-1048 and ANSI Z97-1 and 16CFR1201 specify three classifications for Strengthened Glass:
The SG2700 Strengthened / Tempered Glass Detector does not differentiate between these three classifications. It simply confirms that the glass has been strengthened in one of the three capacities. |
Basic Operation |
The SG2700 should be placed flat against the glass to be tested. When possible, place the meter on the side of the glass that will allow for the darkest background behind the glass. Turn the meter on and look through the specialized viewing port to view the reflections off the glass surface. You should view the reflections head-on, and not at an angle. Single panes of glass will result in two columns of reflections, while double pane windows will result in four columns of reflections (1 reflection from each surface of the glass). The column of light reflections nearest the power button is surface 1 (surface 1 is the surface the meter is resting against). You will examine these reflection columns to determine if your glass has been strengthened or tempered. |
Single Pane / First Pane Detection |
For the first pane of glass in an assembly, you will monitor reflection column 2, and compare its color to reflection column 1. If the color of the reflections of column 2 changes to a different color than column 1, then the first piece of glass is strengthened. See Figure 1 below. If column 1 and column 2 both change colors together, this is NOT an indication that pane 1 is strengthened. Please note that stress lines are not present throughout the glass. You must inspect a reasonable portion of the surface area to confirm if the glass is strengthened. If you identify at least one stress line, then the glass is considered strengthened. |
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Second Pane Detection |
For the second pane of glass in an assembly, you will monitor reflection column 4, and compare its color to reflection column 3. If the color of the reflections of column 4 changes to a different color than column 3, then the second lite of glass is strengthened. See Figure 2 below. If column 3 and column 4 both change colors together, this is NOT an indication that pane 2 is strengthened. ALSO, if reflection column 3 changes color, but reflection column 4 remains the same color, this also is NOT an indication that pane 2 is strengthened. COLUMN 4 MUST CHANGE COLOR WITH RESPECT TO COLUMN 3 IN ORDER FOR PANE 2 TO BE CONSIDERED STRENGTHENED. |
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Pane 1 Glass Thickness |
The SG2700 detector has the added feature of being able to measure the thickness of glass in pane 1. This will work on single piece of glass, as well as panes of glass installed in a double pane window. It is often helpful to close one eye when using this feature. To conduct a glass thickness measurement place the detector on the glass and turn it on. You must tilt your head to an approximate viewing angle of 45 degrees. Align your eyesight so the column 1 reflection is aligned with the “ZERO” line on the Glass Thickness Indicator. You will notice that the light source element closest to the glass thickness indicator has been reduced in size to help with aligning the zero line. After you have centered the Column 1 reflection on the zero line, look at the Column 2 reflection and determine which thickness indicator it is closest to. This will yield the resulting thickness of pane 1. We recommend taking a couple of measurements to confirm your results. |
Helpful Operating Tips |
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• When detecting strengthened glass, the angle at which you hold your head is crucial. Align your sight so the reflections look the brightest and show the most contrast in color possible. This is typically accomplished with the SG2700 detector by viewing the reflections head-on. Rotating the meter will usually help accentuate the color differences. • When the light behind the meter is excessive, block the light by placing your hand on the back side of the window if possible. This makes the color changes much easier to view. This is especially helpful on sunny days when you are on the inside of a building looking out. Best results tend to occur when you are on the outside of the building looking in. Standing on the outside allows you to shield the sunlight that hits the front of the meter. • When having trouble finding stress lines in the glass, it is often helpful to test the glass close to one of the corners. Stress lines are often more frequent in the corner locations, as opposed to the center of the glass. • Each piece of strengthened glass will have a different number of stress lines. Some will contain numerous lines and be very simple to identify, while others may contain only a few. Test the glass thoroughly before reaching your conclusion. |
Battery Replacement |
The SG2700 is powered by a 9 volt alkaline battery. When the battery voltage is getting too low to operate the meter, the low battery indicator will turn on. The detector can still be used at this point, however it is recommended that the battery be replaced soon. The lights in the meter will begin to grow dim and make it more difficult to conduct easy measurements. Alkaline batteries are recommended for this product. |
Warranty |
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The manufacturer warrants all models of the SG2700 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 twelve (12) months from the original date of shipment after the unit is returned to the manufacturer’s factory, prepaid by the user, and the unit is disclosed to the manufacturer’s 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 SG2700 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 SG2700, as established by EDTM, Inc. |
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