Extech Instruments DT100 User manual

User Guide
Ultrasonic Distance Finder
Extech DT100
查询"DT100"供应商

Model DT100 V4.2 9/08
2

Support line [phone]
Technical support: Extension 200; E-mail: [email protected]
Repair & Returns: Extension 210; E-mail: [e-mail]
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
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 [phone] ext. 210 for authorization
or visit our website www.extech.com for contact information. 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.
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.
查询"DT100"供应商

Model DT100 V4.2 9/08
3
AREA
L
W
H
VOL.
M1
M3
M2
M
mm
ft ft
333
3
2
2
123 45678
910 11 12
Feet / Meters Conversion
Volume Computation
Memory Clear
Front / Base distance reference
Memory 1
Area Computation
Memory 3
Memory Store
Escape
Memory 2
Distance Addition
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 ft2or 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 ft3or m3
10. Memory, area/volume
11. Area/Volume units
12. Base measurement
Keypad Description
2
9
8
7
6
5
4
31
查询"DT100"供应商

Model DT100 V4.2 9/08
4
10cm
4”
Operating Instructions
Notes and Measurement Considerations
1. For best results, choose a target that is flat, hard and smooth
2. Use a piece of cardboard or similar material if the target size needs to be increased
3. Replace the battery if the battery icon appears in the display
4. The meter will not measure through glass
5. Always measure perpendicular to the target. Do not point at an angle
6. Surfaces parallel to the measurement beam should be at least 4” (10cm) from the side,
top or bottom of the meter.
7. When measuring between 40’ and 50’ (12m and 15m) the relative humidity should be
above 50% and the target area at least 10ft x 10ft (3m x 3m)
8. Inaccurate measurements may result from any of the following:
a) Low battery
b) Measured distance exceeds specified range: 1’5” to 50’ (0.5 to 15m)
c) Interference from other ultrasonic sources
d) Meter is not held perpendicular to the target
e) Long narrow corridors
f) Irregulat objects near the target
9. An error message “Err” will appear in the display when:
a) The measured distance or calculation exceeds the specified range
b) The instrument is held at a wide angle to the target
c) The target surface is not reflective ( i.e. soft and irregular surface
such as carpet, curtains or irregular wall paper)
查询"DT100"供应商

Model DT100 V4.2 9/08
5
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.
查询"DT100"供应商

Model DT100 V4.2 9/08
6
Volume Calculation
The DT100 allows the user to compute the volume of a room.
1. Press the VOL button.
2. An ‘L’ will flash in the display on the three 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. An ‘H’ will now flash to indicate that a Height measurement is to be taken next.
7. Press the READ button to measure the room height.
8. The Volume will be indicated in the lower portion of the meter’s display.
9. To redo the Volume measurement, press the ESC button and then repeat steps 1
through 6.
10. To enter a new mode of operation press the ESC button and proceed to a new
task.
11. 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.
12. Press ESC to continue.
Storing Readings in Memory Locations M1, M2, and M3
The DT100 allows the user to store up to three (3) readings in memory for later recall.
1. Take a reading as previously described.
2. With the reading displayed, press the STORE button. The M1, M2, and M3
indicators will appear in the display.
3. Press the M1, M2, or M3 button to select a memory location to save the currently
displayed reading. A short beep will sound indicating that the reading was stored.
4. Press the ESC button at any time to abort the storage session.
5. If a reading exists in a particular memory location saving to it again will overwrite
the existing reading.
6. Readings are not saved after the meter is turned off.
Viewing Stored Reading
Simply press the M1, M2, or M3 button to view the reading currently stored in that
location.
Clearing Stored Readings
1. Press the M1, M2, or M3 button to access a memory location and view the reading
that is to be erased.
2. Press the CLR button to erase the currently selected memory location.
Flashlight
1. Slide the ON –OFF switch to the OFF/LIGHT position.
2. Press the LIGHT button on the side of the meter to turn the flashlight on.
查询"DT100"供应商

Model DT100 V4.2 9/08
7
Maintenance
WARNING: Do not operate the meter until the battery compartment cover is in place and
fastened securely.
This instrument is designed to provide years of dependable service, if the following care
instructions are performed:
1. Keep the meter dry and free from dust.
2. Use and store the meter in nominal temperature conditions. Temperature
extremes can shorten the life of the electronic parts and distort or melt plastic parts.
3. Handle the meter carefully and avoid shock and vibration. Dropping the meter
may damage the electronic parts or the case.
4. Keep the meter clean. Wipe the case occasionally with a damp cloth. DO NOT use
chemicals, cleaning solvents, or detergents.
5. Use only fresh batteries of the correct type. Remove old or weak batteries so they
do not leak and damage the unit.
6. If the meter is to be stored for long periods, the batteries should be stored
separately to prevent damage to the unit.
Battery Installation/Replacement
When the low battery symbol appears on the display or when the display does not switch
ON, replace the 9V battery.
1. Slide the ON-OFF switch to OFF before replacing the battery.
2. Slide down the rear battery compartment cover.
3. Un-snap the old battery and replace with a fresh one.
4. Replace the battery compartment cover.
Auto Power OFF
When the READ button is released during a test, the measurement value remains on the
LCD for 60 seconds. After 60 seconds the meter automatically shuts OFF; this is to
preserve the battery. Slide the ON-OFF switch from OFF to ON in order to start another
test after the Auto Power OFF timer turns the instrument OFF.
Specifications
General Specifications
Laser diode Class IIIa (Class 2) red laser; 630 to 670nm
Battery 9V alkaline battery
Operating conditions 39 to 102oF (0 to 39oC)
Dimensions 5.4 x 2.4 x 1.7” (136 x 61.5 x 44mm)
Weight Approximately 4.1 oz. (117g) excluding battery
Recommended use For indoor use only
Range Specifications
Distance Range 1’ 8” to 50’ (0.5 to 15m)
Resolution 0.1” (0.01m)
Accuracy ± (0.3% +1 least significant display digit) within 20’ (6m)
Displayed Calculation Ranges
Length 99’ 11” (99.99m)
Area 999.99 sq. ft. (999.99m2)
Volume 999.99 cu. ft. (999.99m3)
Calculation rounding Calculations are rounded up or down 2 least significant
digits
Copyright ©2006 Extech Instruments Corporation (a FLIR company)
All rights reserved including the right of reproduction in whole or in part in any form.
查询"DT100"供应商

Model DT100 V4.2 9/08
8
查询"DT100"供应商