DT100 Datasheet, PDF (5/8 Pages) Extech Instruments Corporation. – Ultrasonic Distance Finder

Preparation for Measurements
1. Slide the ON –OFF switch to the ON position.
2. Press the FT/m button to select the displayed units as Feet/Inches or Meters.
3. Press the Fm/Bm button to select the Front (top of meter) or Base (bottom of
meter) distance reference. In the Front mode of operation, the displayed reading
will represent the distance from the top of the meter to the target. In the Back mode
of operation, the displayed reading will represent the distance from the bottom of
the meter to the target.
Distance Measurements
1. Point the meter at the target.
2. Press and Hold the READ button
3. The meter will continuously display and update the distance in the display.
4. Release the READ button and the last reading will remain in the display for 60
seconds.
Adding multiple measurements
A series of measurements can be taken and summed. This feature is useful for distances
greater than 50’ (15m) which is the instrument’s distance limit.
1. Press the READ button to take the first measurement.
2. Press the ADD button (+ will appear in the display).
3. Press the READ button again to take another measurement.
4. The sum of the two measurements will now be indicated on the meter’s display.
5. Repeat steps 2 and 3 as needed to a display limit of 99’ 11” (99.99m)
Area Calculation
The DT100 allows the user to compute the area of a room.
1. Press the AREA button.
2. An ‘L’ will flash in the display on the two dimensional box icon to indicate that a
Length measurement is to be taken.
3. Press READ to take the room length measurement.
4. A ‘W’ will now flash to indicate that a Width measurement is to be taken next.
5. Press the READ button to measure the room width.
6. The Area will be indicated in the lower portion of the meter’s display.
7. To redo the Area measurement, press the ESC button and then repeat steps 1
through 6.
8. To enter a new mode of operation press the ESC button and proceed to a new
task.
9. To store a reading in memory, press the M1, M2, or M3 key to select a memory
location. A short beep will sound indicating that the memory was stored.
10. Press ESC to continue.
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Model DT100 V4.2 9/08