Extech DT100 Operating Manual
User Guide
Ultrasonic Distance Finder
Extech DT100
Introduction
Congratulations on your purchase of the Extech Model DT100 Ultrasonic Distance Finder.
This meter measures distance up to 50 ft (15m), calculates area and volume and has a
built-in flashlight. In addition, the DT100 includes a laser pointer for more accurate
targeting when taking measurements. This meter is shipped fully tested and calibrated
and, with proper use, will provide years of reliable service.
Safety Instructions
This meter has been designed for safe use, but must be operated with caution.
WARNING: Do not directly view or direct the laser pointer at an eye. Low power
visible lasers do not normally present a hazard, but may present some potential for
hazard if viewed directly for extended periods of time.
Warranty
EXTECH INSTRUMENTS CORPORATION warrants this instrument to be free of defects in parts and
workmanship for one year from date of shipment (a six month limited warranty applies to sensors and
cables). If it should become necessary to return the instrument for service during or beyond the
warranty period, contact the Customer Service Department at (781) 890-7440 ext. 210 for authorization
or visit our website www.extech.c om for contact info rmation. A Return Authorization (RA) number must
be issued before any product is returned to Extech. The sender is responsible for shipping charges,
freight, insurance and proper packaging to prevent damage in transit. This warranty does not apply to
defects resulting from action of the user such as misuse, improper wiring, operation outside of
specification, improper maintenance or repair, or unauthorized modification. Extech specifically
disclaims any implied warranties or merchantability or fitness for a specific purpose and will not be liable
for any direct, indirect, incidental or consequential damages. Extech's total liability is limited to repair or
replacement of the product. The warranty set forth above is inclusive and no other warranty, whether
written or oral, is expressed or implied.
Technical support: Extension 200; E-mail: support@extech.com
Repair & Returns: Extension 210; E-mail: repair@extech.com
Product specifications subject to change without notice
For the latest version of this User Guide, Software updates, and other
up-to-the-minute product information, visit our website: www.extech.com
Extech Instruments Corporation, 285 Bear Hill Road, Waltham, MA 02451
Support line (781) 890-7440
Calibration and Repair Services
Extech offers repair and calibration services for the products we sell. Extech also
provides NIST certification for most products. Call the Customer Service Department for
information on calibration services available for this product. Extech recommends that
annual calibrations be performed to verify meter performance and accuracy.
2
Model DT100 V4.2 9/08
Meter Description
1. Flashlight
2. Ultrasonic tester
3. Laser Pointer
4. LCD display area
5. Measure and Laser Pointer button
6. Flashlight activation button
7. Meter ON/OFF switch
8. Keypad (see separate description)
9. Base reference edge
Note: The battery compartment is located
on the rear of the instrument
Display Description
1. Area in ft2 or m2
2. Low battery indicator
3. Addition indicator
4. Distance “feet” indicator
5. Distance “inch” indicator
6. Distance “meter” indicator
7. Memory indicators
8. Front measurement
9. Volume in ft
10. Memory, area/volume
11. Area/Volume units
12. Base measurement
Keypad Description
3
or m3
4
5
6
1
AREA
W
VOL.
9
23
L
H
10
2
31
7
8
9
6
7
M1
M2
M3
M
33332
ft
ft
2
m
m
11 12
8
5
4
Feet / Meters Conversion
Area Computation
Memory 1
Front / Base distance reference
Memory Clear
Volume Computation
Memory 2
Escape
Memory Store
Memory 3
Distance Addition
3
Model DT100 V4.2 9/08
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