FEATURES:
• 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
745 Capital Commons Drive
Toledo, Ohio 43615 USA
PHONE: (419) 861-1030
FAX: (419) 861-1031
www.EDTM.com Email: [email protected]
STRENGTHENED
GLASS DETECTOR
MODEL# SG2700
KEEP THE COMPETITIVE EDGE WITH
PRODUCTS FROM EDTM, INC.
glass & air space laser meters, tempered
glass detectors, SHGC, solar, visible, & uv
meters Low-E type detectors, 4 point sheet
resistance meters, tin side detectors, self-
clean coating detectors, sales kits, tem-
perature guns & sales kit accessories.
The Strengthened Glass De-
tector identifies if a piece of
glass, or a dual pane window
has been strengthened.
The SG2700 allows the user
to easily view the stress lines
that occur in glass that has
been strengthened. Therefore,
you can determine if the glass
has been strengthened. It also
will estimate the thickness of
the first pane of glass.
Column 4 on the left:
reflection off of bottom
surface of 2nd pane
Column 1 on the right:
reflection off of first surface
or contacting surface
Figure 1: SG2700 inspecting a dual pane window. Note that one reflection column occurs for
each glass surface.
Column 1
on
the right hand
side represents
the surface of
the glass that
the meter is
touching.
#
Column 2
on
the left hand
side represents
the opposite
surface of the
glass.
#
• Convenient push-on/push-off power switch
• Small, portable convenient size
• Protective carrying case
BASIC OPERATION
Place the SG2700 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 special-
ized viewing port to view reflections off the
glass surface. Single panes of glass will re-
sult in two columns of reflections (one from
each glass surface) while double pane win-
dows will result in four columns of reflections.
For best viewing results, look at the reflec-
tions in the viewing port head-on, not at
an angle.
You will use these reflections to
determine if the glass has been strength-
ened.
SINGLE PANE/FIRST PANE DETECTION
1. Place the meter on the glass. You will
see two columns of light reflections (one
column for each surface of the glass).
2. Slide the meter over a large portion of the
glass surface, and pay close attention to
the colors of the two columns of light.
3.
THE GLASS IS STRENGTHENED IF:
• The reflections in column 2
CHANGE
to a different color than column one.
This means that the meter is detect-
ing a stress line in the glass (strength-
ened). See Figure 2.
WARNING!
Remember that you are looking
for a CHANGE in color of column 2, with re-
spect to column 1. It is possible that column
2 will start out as different color than column
1. This is
NOT
signifying strengthened glass.
You must see an actual change of color
(stress line) in column 2 to confirm it is
strengthened. For soft coat (sputtered) Low-
E coatings and other specialty coatings, the
reflection from the surface of glass contain-
ing the Low-E coating may appear as a differ-
ent color (typically green) than the uncoated
surface. Remember you are watching for
column 2 to change colors with respect to col-
umn 1 as you slide across the glass. If column
2 maintains the same color throughout the
travel across the glass, it is NOT strength-
ened.
4.
THE GLASS IS
NOT
STRENGTHENED
IF:
• Neither column changes color
• Both columns change color together
5. It can be very helpful to
rotate the meter
in place
over a suspected stress line. This
often makes it easier to confirm whether
or not you are detecting a stress line.
Figure 2: Reflection of a single pane of glass in
the viewing window:
Monitor the colors in column 2. If the colors
change to a color different than column 1 as
you travel across the glass, this represents
stress lines, indicating that your glass is
strengthened.
Note that the color change of column 2 com-
pared to column 1 in this example indicates
the glass is strengthened.
2 1
DIFFERENCE
between columns 1 and 2 indicates stress lines
— or —
Strengthened Glass
Both of the examples inside of this box show differences
between columns 2 as compared to column 1. In both in-
stances, this means the meter has detected stress lines
indicating that the glass is strengthened.
For best results in looking for color change in the left column (2), inspect a large portion of
the glass, and rotate the meter in place over suspected stress lines.
NO DIFFERENCE
between columns 1 and 2 indicates no stress lines
— or —
Regular Glass
In both of these examples, there is no difference between
columns 1 and 2. This means that the meter is not detect-
ing any stress lines which indicates that the sample is
regular, non-strengthened glass.
Take special notice of the example to the right. The colors near the top of both columns have
changed color, BUT since both columns changed together, this still means there is no indi-
cation of strengthened glass.
2 1
2 1
2 1
2 1
4 3 2 1
SECOND PANE DETECTION
1. Place the meter on the glass. You will see
4 columns of light reflections (one column
for each surface of the glass).
2. Slide the meter over a large portion of the
glass surface, and pay close attention to
the colors of the two columns of light far-
thest to the left (columns 3 and 4).
3.
THE GLASS IS STRENGTHENED IF:
• The reflections in column 4
CHANGE
to
a different color than column 3 as you
slide the meter across the glass. This
means that the meter is detecting a
stress line created during the strength-
ening process
4.
THE GLASS IS
NOT
STRENGTHENED
IF:
• Neither column (3 or 4) changes color
• Both columns (3 & 4) change color to-
gether
5. It can be very helpful to
rotate the meter
in place
over a suspected stress line. This
often makes it easier to confirm whether
or not you are detecting a stress line.
Figure 3: Reflection shown from 2 panes of
glass
For second pane detection, monitor the col-
ors in
column 4
. If the colors change to a
different color than column 3 as you slide
across the glass, this represents stress lines
indicating that your second pane of glass is
strengthened.
Note that the color change of column 4 with
respect to column 3 in this example indicates
that the second pane of glass is strengthened.
Column 3
(second from
left) represents
the closest
surface of
the second
pane of glass.
Column 1
(farthest to
the right)
represents the
surface of glass
the meter is
touching.
Column 4
(farthest to the
left) represents
the opposite
surface of the
second pane of
glass.
Column 2
(second from
right)
represents the
opposite sur-
face of the first
pane of glass.
#
#
#
#
DIFFERENCE
between columns 3 and 4 indicates Stress lines
— or —
Strengthened Glass in pane 2
Both of the examples inside this box show differences
between columns 3 and 4. In both instances, this means
that the meter has detected stress lines indicating that
the second pane of glass is strengthened.
Both of the examples inside this box show differences between columns 3 and 4. In both
instances, this means that the meter has detected stress lines indicating that the second
pane of glass is strengthened.
NO DIFFERENCE
between columns 3 and 4 indicates no stress lines
— or —
Regular Glass in pane 2
In this example, there is no difference between columns 3 and 4. This
means that the meter is not detecting any stress lines in pane 2, which
indicates that the sample is regular, non-strengthened glass.
4 3 2 1
4 3 2 1
4 3 2 1
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