Ultrasonic
Thickness
Gauge
TM-8811
Instruction
Manual
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Table of Contents
Introduction ................................................................................................ 3
Product Quality ........................................................................................... 3
Safety ......................................................................................................... 3
Features ...................................................................................................... 3
Specications ............................................................................................. 4
Included ...................................................................................................... 4
Instrument Description ............................................................................... 5
Operating Instructions ........................................................................... 6-12
Initial Calibration .................................................................................... 6
Material Mode Selection ..................................................................... 6-8
Selecting Pre-loaded Materials .....................................................6-7
Measuring Procedure ....................................................................... 8
Auto Power OFF .................................................................................... 8
Setting the Sound Velocity for a Known Material .............................8-10
Determining the Sound Velocity for a Material
with a Known Thickness ...................................................................... 10
Measurement Methods........................................................................ 11
Maintenance ........................................................................................ 12
Cleaning the Test Piece .................................................................. 12
Protecting the Ultrasonic Sensor .................................................... 12
Replacing the Ultrasonic Sensor .................................................... 12
Battery Replacement ................................................................................ 12
Applications .............................................................................................. 12
Accessories and Replacement Parts ....................................................... 13
Product Care ............................................................................................ 13
Product Warranty ..................................................................................... 13
Product Disposal and Recycling .............................................................. 14
Product Support ....................................................................................... 14
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Introduction
Thank you for purchasing your REED TM-8811 Ultrasonic Thickness Gauge.
Please read the following instructions carefully before using your instrument.
By following the steps outlined in this manual your meter will provide years
of reliable service.
Product Quality
This product has been manufactured in an ISO 9001 facility and has
been calibrated during the manufacturing process to meet stated product
specications. If a certicate of calibration is required please contact the
nearest authorized REED distributor or authorized Service Center. Please
note an additional fee for this service will apply.
Safety
Never attempt to repair or modify your instrument. Dismantling your product,
other than for the purpose of replacing batteries, may cause damage that will
not be covered under the manufacturer's warranty. Servicing should only be
provided by an authorized service center.
Features
•
Measures the thickness of steel, cast iron, aluminum, red copper, brass,
zinc, quartz glass, polyethylene, PVC, grey cast iron and nodular cast iron
• Large, easy-to-read LCD display
• Displays sound velocity at the touch of a button
• Automatic material calibration
• User selectable unit of measure (in/mm)
• Low battery indicator
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Specifications
Measuring Range: 0.05 to 7.9" (1.5 to 200mm)
Accuracy: ±(0.5% + 0.1mm)
Resolution: 0.001"/0.1mm
Velocity Range: 500 to 9000m/s
Compatible Materials:
Sampling Time: Less than 1 second
Display: 4-Digit, LCD
Probe Length: 3' (36")
Probe Diameter: 0.4” (10mm)
Low Battery Indicator: Yes
Power Supply: 4 x AA Batteries
Product Certications: CE
Operating Temperature: 32 to 122°F (0 to 50°C)
Probe Operating Temperature: 32 to 104°F (0 to 40°C)
Storage Temperature: -4 to 140°F (-20 to 60°C)
Operating Humidity Range: 20 to 80%
Dimensions: 6.3 x 2.7 x 1.25" (161 x 69 x 32mm)
Weight: 9oz (258g)
Steel, cast iron, aluminum, red copper,
zinc, quartz glass, polyethylene, PVC,
grey cast iron and nodular cast iron
Included
• Ultrasonic Couplant Gel
• Probe
• Hard Carrying Case
• Batteries
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Instrument Description
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5
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1. Ultrasonic Sensor
2. Material Selection Button
3. Power Button
4. Up Arrow
5. Calibration Test Block
6. Probe Connectors
7. Coupling Indicator
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8. LCD Display
9. Coupling LED
10. Calibration Button
11. Unit of Measure Button
12. Down Arrow
13. Velocity Button
14. Battery Cover (Back)
5
Operating Instructions
1. Insert the ultrasonic sensor into the probe connectors on the meter.
2. Press the Power button to turn the meter on.
3. The LCD will display "0" and the selected unit of measure.
Initial Calibration
1. Place a small drop of coupling gel (R7950) on the 5mm calibration
test block.
2. Press the CAL button and "CAL" will appear on the display.
3. Place the sensor on the calibration test block while ensuring the
coupling indicator appears on the display and the coupling LED
turns on.
4. Depending on the selected unit of measure either "5.0 mm"
(or "0.197 in") and "CAL" will ash interchangeably on the display.
5. While continuing to hold the sensor on the calibration test block,
press CAL again to save.
6. Calibration is now complete and the ultrasonic sensor can now be
removed from the calibration test block.
Note: Results from the calibration procedure will automatically save in the
meter. It is not necessary to calibrate the meter each time the unit is powered
on unless measurements appear to be inaccurate. The calibration procedure
conrms both the meter and ultrasonic sensor are functioning properly.
Material Mode Selection
Selecting Pre-loaded Materials
The meter has been pre-loaded with 11 common materials to allow for
quick setup and testing. In order to select the appropriate setting, follow
steps 1 through 4 below.
1. While the meter is on, press the SELECT button.
2. The display will either indicate "CdXX" or "XXXX". "Cd" stands for
code and "XX" is the pre-loaded material number which ranges from
1 to 11 as shown in the table below.
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3. "XXXX" is a 4-digit number that represents the sound velocity of the
material that can be adjusted by the user (For entering and adjusting
Sound Velocity please see "Setting the Sound Velocity for a known
Material".
No. Code Material
1 Cd01 Steel
2 Cd02 Cast Iron
3 Cd03 Aluminum
4 Cd04 Copper
5 Cd05 Brass
6 Cd06 Zinc
7 Cd07 Quartz / Glass
8 Cd08 Polyethylene
9 Cd09 PVC
10 Cd10 Gray Cast Iron
11 Cd11 Nodular Cast Iron
12 XXXX User Dened Sound Velocity
4. Press the
or arrows to select the desired material code.
Press the SELECT button to conrm your selection. The display will
show "0" conrming the material has been selected. If you select a
material code without conrming the selection the meter will automatically resume normal operation after a few seconds.
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Measuring Procedure
Once the material has been selected, follow steps 1 through 4 below to
perform a measurement.
1. While the meter is on, press the mm/inch button to select the correct unit of measure.
2. After applying coupling gel on the material, place the sensor rmly
against the desired measurement area.
Note: For most applications a single droplet of coupling gel is sufcient.
3. Verify that the Coupling Indicator
coupling LED light turns on.
4. The LCD will display the measured value and will hold this value until
a new measurement is taken or until the unit is turned off.
Note: If the coupling indicator does not appear on the display, or the
measured values appear to be erratic, verify that there is an adequate
amount of coupling gel in between the ultrasonic sensor and the material
under test. It is also important that the ultrasonic sensor sits at against
the material.
appears on the display and the
Auto Power Off
To preserve battery life, the meter is programmed to turn off after
approximately 1 minute of inactivity.
Setting the Sound Velocity for a Known Material
If the material under test is not pre-loaded, the sound velocity of the
material under test can be entered. To enter the appropriate sound velocity,
follow steps 1 through 9 below.
1. While the meter is on, press the SELECT button.
2. The display will either indicate "CdXX" or "XXXX".
3. Press the or arrows to scroll through the material codes until
you see the 4-digit value.
4. This 4-digit number represents the last set sound velocity of a material.
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5. Press the SELECT button to conrm your selection. The display will
show "0" conrming the material has been selected. If you select a
material code without conrming the selection the instrument will
automatically resume normal operation after a few seconds.
6. Press the VEL button and the display will show the last saved sound
velocity measurement.
7. The sound velocity can be adjusted by pressing the or
arrows to match the sound velocity for the material under test as
shown in the table below.
Material
Sound Velocity
(m/s) (inch/µs)
Aluminum 6320 to 6400 0.250
Zinc 4170 0.164
Silver 3607 0.142
Gold 3251 0.128
Tin 2960 0.117
Steel, Common 5920 0.233
Steel, Stainless 5740 0.226
Brass 4399 0.173
Copper 4720 0.186
Iron 5930 0.233
Case Iron 4400 to 5820 0.173 to 0.229
Lead 2400 0.094
Nylon 2680 0.105
Titanium 5990 0.236
SUS 5970 0.240
Epoxy Resin 2540 0.100
Ice 3988 0.222
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Material
Sound Velocity
(m/s) (inch/µs)
Plexiglass 2692 0.106
Grey Cast 4600 0.180
Porcelain 5842 0.230
Glass (Quartz) 5570 0.220
Polystyrene 2337 0.092
PVC 2388 0.094
Quartz Glass 5639 0.222
Rubber, Vulcanized 2311 0.091
Teon 1422 0.058
Water 1473 0.058
8. Press the
or arrows to adjust the sound velocity value by
10m/s. Press and hold the or arrows to adjust the sound
velocity value by 100m/s.
9. Press the VEL button to conrm your selection. The display will show
"0" conrming the sound velocity has been set. If you set a sound
velocity without conrming the selection the meter will automatically
resume normal operation after a few seconds.
Determining the Sound Velocity for a Material with a
Known Thickness
The sound velocity of a material can be measured using a test piece with
a known thickness. In order to determine the sound velocity follow steps 1
through 3 below.
1. Measure the test piece with a caliper or micrometer to conrm
the thickness.
2. Repeat steps 3 through 9 from the "Setting the Sound Velocity for a
Known Material" section above.
3. Once the sound velocity has been set, proceed with testing.
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Measurement Methods
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There are three base measurement methods:
1. Single measurement method: This method involves measuring the
thickness at a single point.
2. Double measurement method: This method involves performing two
thickness measurements near a single spot rotating the ultrasonic
sensor from 0 to 90° respectively, with respect to the split face
(Fig.1).Take the smaller of the two indicated values as the thickness
of the material.
Fig 1
3. Multi-point measurement: This method involves performing a number
of measurements within a circle having a maximum diameter of
about 1.18" (30mm). Take the minimum indicated value as the
thickness of the material.
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Maintenance
Cleaning the Test Piece
After taking a measurement, clean the test pieces to prevent them from
rusting. If the pieces are not being used for a long period of time coat
them with oil to prevent rust.
Protecting the Ultrasonic Sensor
Be sure to clean the ultrasonic sensor and cable after each use. Grease, oil
and dust will cause the cable to dry out and shorten life expectancy. The
temperature of the surface being measured should not exceed 140°F (60°C).
Replacing the Ultrasonic Sensor
The degradation and wear of the probe's interlayer plate will inuence
measurements. Replace the probe when the following occurs:
1. If it always displays the same value when measuring different thicknesses
2. When a measurement displays no value
Battery Replacement
1. When the low battery symbol appears on the display, replace
the batteries.
2. Remove the battery cover on the back and insert 4 x "AA" batteries.
Applications
• Monitoring and verifying pipes and pressure vessels
• Industrial manufacturing
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Accessories and Replacement Parts
• TM-8811PROBE Replacement Probe
• R7950 Ultrasonic Couplant Gel
• R7950/12 Ultrasonic Couplant Gel, Pack of 12
• R7950/5L Ultrasonic Couplant Gel, 5L
• R9060 5-Step Calibration Block
• R8888 Deluxe Hard Carrying Case
• CA-52A Soft Carrying Case
Don't see your part listed here? For a complete list of all accessories and
replacement parts visit your product page on www.reedinstruments.com.
Product Care
To keep your instrument in good working order we recommend the following:
• Store your product in a clean, dry place.
• Change the battery as needed.
• If your instrument isn't being used for a period of one month or longer
please remove the battery.
• Clean your product and accessories with biodegradable cleaner. Do not
spray the cleaner directly on the instrument. Use on external parts only.
Product Warranty
REED Instruments guarantees this instrument to be free of defects in
material or workmanship for a period of one (1) year from date of shipment.
During the warranty period, REED Instruments will repair or replace, at no
charge, products or parts of a product that proves to be defective because
of improper material or workmanship, under normal use and maintenance.
REED Instruments total liability is limited to repair or replacement of the
product. REED Instruments shall not be liable for damages to goods,
property, or persons due to improper use or through attempts to utilize the
instrument under conditions which exceed the designed capabilities. In
order to begin the warranty service process, please contact us by phone at
1-877-849-2127 or by email at info@reedinstruments.com to discuss the
claim and determine the appropriate steps to process the warranty.
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Product Disposal and Recycling
Please follow local laws and regulations when disposing or recycling your
instrument. Your product contains electronic components and must be
disposed of separately from standard waste products.
Product Support
If you have any questions on your product, please contact your authorized
REED distributor or REED Instruments Customer Service by phone at
1-877-849-2127 or by email at info@reedinstruments.com.
Please visit www.REEDInstruments.com for the most
up-to-date manuals, datasheets, product guides and software.
Product specifications subject to change without notice.
All rights reserved. Any unauthorized copying or reproduction of
this manual is strictly prohibited without prior written permission
from REED Instruments.
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