EDTM RD1850 Operator's Manual

OPERATOR'S MANUAL

The instrument is powered by a 9-volt alkaline battery (supplied). The
instrument will notify you when the battery is starting to get low. The meter will
continue to operate, as this is just a warning that you will need to replace the
battery in the near future. Once the battery has reached a level that is too low,
the instrument will lock up the display with a “REPLACE BATTERY” message.
To access the battery, remove the battery cover and replace with a new 9-volt
alkaline battery. If the unit is going to be stored for more than a month without
use, we recommend removing the battery during storage.

Do not tamper with the enclosure of the instrument. Opening the enclosure
WILL affect the calibration of the instrument AND will void the warranty.

Do not apply excessive force to the switch. Doing so could affect the
performance of the instrument, especially if excessive force is applied during
testing.

The instrument has been calibrated for testing Guardian IS-15 AND IS-20 low e
coatings, along with other Guardian low e coatings. Testing of materials other
than those listed is not warranted to produce the correct test results. If you have
a custom application, consult the factory to find out if the product is applicable.

Guardian IS (Interior Surface) Detector

MODEL# RD1850

BATTERY REPLACEMENT

WARRANTY

USE / MIS-USE

The manufacturer warrants the electronics included in all models of the RD1850 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
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, enclosures, lenses and front panel interface components are
not covered by warranty.

EDTM, Inc. assumes no liability for the consequential damages of any kind through the use or misuse of the
RD1850 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 RD1850, as established by
EDTM, Inc.

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4

Low E Coating

Detectors

(Model# AE1601)

DIGITAL!

Glass & Air Space

Laser Meters

(Model# GC3000)

EDTM, INC.

745 Capital Commons Drive Toledo, Ohio 43615 USA

Ph. 419-861-1030 Fx. 419-861-1031

EMAIL: [e-mail] WEB: WWW.EDTM.COM

The Guardian IS Detector allows the user to easily identify the coated side of the
glass and differentiate if the coating is IS-15, IS-20 or a standard type of low e
coating. Simply place the meter against the glass surface and push the button.
The results will instantly be displayed on the LCD screen. The instrument
includes a MENU button that allows the user to operate the meter in SINGLE
TEST MODE or FREE RUNNING MODE (continual measurements).
Repeatedly pushing the MENU button will scroll through all of the available
options of the meter. When you find the option you desire, simply push the
Power/Select button and it will make your selection for you.

OTHER PRODUCTS FROM EDTM, INC.

FEATURES

Differentiate between IS-15, IS-20 and standard performance low e coatings
SINGLE TEST mode or FREE RUN continual measurement operating mode
Able to recalibrate instrument in the field
Backlit LCD display for testing in any light condition
User-friendly LCD display operation with step-by-step directions on how to use
“OPTO-CLEAN” error protection against dirty glass and dirty lens on the meter
Powered by standard 9-volt alkaline battery (included)
Automatic power-down feature to extend battery life
Tactile membrane switches on the front panel

MISCELLANEOUS

OPERATION

TEST RESULTS - continued

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POWER

If the user wants to turn the power off manually, you need to press AND HOLD the power button for 2
seconds. After 2 seconds the powering-down screen will appear, and the meter will begin its
countdown to shutting off. You must continue to hold the button down during the countdown to
complete the powering off sequence. If you let up on the button too early, the instrument will resume
operation.

The instrument also has a built-in timer that will automatically power down the product if no button
presses occur for approximately 2 minutes. This energy conservation design helps to extend the life of
the battery in the instrument in case the user forgets to turn it off. To turn the meter back on, simply
push the button.

MAINTENANCE

You will want to occasionally inspect the cleanliness of the viewing window on the back side of the
meter. If you see dust or dirt in the window, please use compressed air to blow it off. If you begin
receiving a large number of error messages during your testing, this may be a sign that the back window
needs cleaned. If there are smudges on the window that do not clean off with compressed air, use a
soft lint-free cloth to wipe the lens. Always use compressed air first to remove any particles that may
scratch the surface of the lens.

To begin, make sure the glass you are testing is clean. Dirty glass or dust and dirt on the surface of the glass
can affect the results of your test. Also make sure the lens on the back side of the meter is clean. To turn
the instrument on, press the momentary power switch on the front of the meter. The display will direct
you to place the meter on the glass you want to test. Place the meter FLAT against the glass. Your test
results will appear on the LCD screen. Here are the various operating modes and features you can select
with the MENU button:

“SINGLE TEST” MODE

Each push of the button will result in one test being done on the surface of glass you are touching. The
meter will not test the opposite side of the glass, rather only the side you are in contact with. The display
will register a measurement of “SURFACE IS COATED IS-15”, “SURFACE IS COATED IS-20”,
“SURFACE IS STANDARD LOW E” or “SURFACE IS UNCOATED”. Hold the instrument stationary
while conducting the measurement. Single test mode is the most battery-efficient operating mode and
the recommended mode of operation.

“FREE RUN” MODE

In this mode, the meter will continually take measurements. There is no need to continually push the
power button when you want to take a measurement, as the meter will be continually doing so.
Measurements will be updated nearly every second. It should be noted that this operating mode will tend
to shorten the life of the battery, as the electronics are powered for a much longer period of time, as
opposed to single test mode.

CALIBRATE

If the coating you are testing has changed in chemistry, or if the warning message on the display has
encouraged you to recalibrate, select this option. Before beginning, be sure to clean the back lens of the
meter, and find a clean sample of the Guardian IS coating you are working with. Use the menu button to
select “calibrate” mode. You can choose to calibrate the IS-15 coating only, the IS-20 coating only, or
both the IS-15 & IS-20 coatings. Follow the instructions on the display to take a measurement on both
sides of the Guardian IS sample. The instructions will ask you to place the meter on the coated side first,
then the clear side second. The meter will indicate if the calibration was successful or not. If the
calibration was not successful, the display will show you what error occurred during the calibration
process. If an error occurs, check to see that the meter lens is clean, and that your Guardian IS sample is
valid and clean.

USE PREV. CAL

If you do not like the new calibration that you performed, you can restore the previous calibration that
was stored in the instrument.

USE FACTORY

If you want to return the meter to the calibration that was originally shipped in the meter as new from the
factory, make this selection.

“PLEASE CLEAN BACK LENS”

This message will appear if the meter has determined that its back lens may be dirty. Simply use
compressed air to blow off any dirt or dust from the back lens of the meter. This message is the first
level of warning that your meter may need to be cleaned.

“MUST CLEAN BACK LENS”

This message is the second level of warning that indicates the meter has a back lens that needs to be
cleaned. The validity of your test results could be affected soon. Clean the back lens of the meter.

“MUST CLEAN AND/OR RECAL”

If the meter has been neglected and the back lens has continually been degrading in cleanliness, this
message will appear. Once this message appears, the validity of test results would be jeopardized, and
the meter will NOT allow test results to be shown. Before any re-calibration is performed, it is
pertinent that the back lens of the meter is cleaned first. This may be all that is needed to get the
meter performing correctly again. Try cleaning the lens first and then test the meter again. If the
same warning message appears, then it is necessary to recalibrate the instrument. Find a clean sample
of the glass type (IS-15 or IS-20) you are working with, and choose the proper recalibration
procedure from the MENU. Before re-calibrating, make sure the Guardian IS glass sample is a valid
sample and that it is clean.

“CLEAN & RE-TEST”

This result screen will show up if the measurement was not in the range anticipated by the meter. This
typically happens when the glass is dirty. Clean the glass and test again. If this does not correct the
problem, you may want to clean the back lens of the instrument by using compressed air to blow off
the lens. If smudges still remain, use a lint-free cloth to wipe the smudges from the lens.

“KEEP METER FLAT ON GLASS DURING TEST”

If you pick up the meter or the instrument is not setting flat against the glass during the test, this error
message will occur. The instrument is monitoring the measurement and if it determines that the
meter has been pulled away from the surface of glass, it will display this message and ask you to start a
new test.

“SURFACE IS” . . . . . . . .

One of the following screens will appear after a successful test, indicating that the glass surface you
are in contact with (Surface 1) contains the following coating:

COATED IS-15: surface 1 contains Guardian IS-15
COATED IS-20: surface 1 contains Guardian IS-20
UNCOATED: surface 1 does not contain any low e coatings
STANDARD LOW-E: surface 1 contains a traditional low e coating that is not IS-15 or IS-20.

This is likely a soft coat low e coating that could be comprised of 1, 2 or
3 silver layers.

Please note, the meter will make NO attempt to identify any low e coatings on surface #2.

TEST RESULTS