REED TM-8811 Manuel utilisateur

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Model TM-8811

Digital Thickness Gauge

with Velocity Function

Instruction

Manual

www.reedinstruments.com

1-877-849-2127 | [email protected]

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Table of Contents

Features......................................................................................... 3

Specications................................................................................ 3

Meter Description.......................................................................... 4

Operating Instructions................................................................4-6

Measuring Procedures .............................................................. 4

Material Selection...................................................................... 5

Calibration................................................................................. 6

Measuring Sound Velocity......................................................... 6

Battery Replacement..................................................................... 7

For service (repairs or calibration) on this or any other REED product

or information on other REED products, contact REED Instruments at

info@reedinstruments.com.

www.reedinstruments.com

1-877-849-2127 | [email protected]

reedinstruments

www com

Features

• Exclusive micro-computer LSI circuit & crystal time base offer

high accuracy

• Digital display provides exact readings without guessing or errors

• Broad band receiving sensitivity means the meter can read probes of

different frequencies

• Auto calibration

• Automatic material calibration

• Selectable metric or imperial

• Measures the thickness of steel, cast iron, aluminum, red copper, zinc,

quartz glass, polyethylene, PVC, gray cast iron & nodular cast iron

• Display sound velocity at the touch of a button

• Automatic power off

Specifications

Measurement Range: 1.2 to 200 mm (#45 steel)

Accuracy: ±(0.5% + 0.1mm)

Resolution: 0.1 mm

Velocity Range: 500 to 9000 m/s

Display: 4-digit, 10mm high LCD

Power Supply: 4 x 1.5V “AA” alkaline batteries

Dimensions: 161 x 69 x 32mm

Operating condition: Temperature 0 - 50°C

Humidity <80%

Weight: 258g (with batteries)

Includes: Ultrasonic sensor, carrying case

& instruction manual

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Meter Description

1 — Material selection button

2 — Power button

3 — Plus button

4 — Velocity button

5 — Sensor plug

6 — Coupling indicator

7 — Display

8 — Calibration button

9 — Ultrasonic sensor

10 — mm/inch button

11 — Minus button

12 — Standard block

13 — Battery compartment/cover

Operating Instructions

Measurement Procedures

1) Press the Power button (#2 above) to turn the unit on.

2) Press the mm/inch button (#10 above) to select the correct unit of

measure.

3) Place the Ultrasonic sensor (#9 above) on the material surface being

measured. Select the correct Material selection code (see the Mate-

rial Selection instructions on page 5). Verify the coupling is okay by

verifying that the Coupling indicator symbol (#6 above) is on. The

reading on the display is the measurement value.

4) The reading will be held until a new measurement is taken or until the

unit is turned off.

5) There are two ways to turn the power off. Either manually, at any time

by pressing the Power button or automatically, as the unit has the auto

power off feature. This feature allows the unit to turn itself off after ap-

proximately 1 minute without button operation.

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Material Selection

1) Press the Power button (#2 on page 4) to turn the unit on.

2) Press the Material Selection button (#1 on page 4) and the display

(#7 on page 4) will show the code “cdxx” or “xxxx”. The “cd” is the ab-

breviation for “code” and “xx” represents a number from 01 to 11. The

“xxxx” represents a 4-digit number which is the sound velocity of the

material being measured. The “cdxx” material relationship is as follows:

No. Code Material No. Code Material

1 cd01 Steel 7 cd07 Quarz glass

2 cd02 Cast iron 8 cd08 Polyethylene

3cd03 Aluminum 9 cd09 PVC

4cd04 Red copper 10 cd10 Gray cast iron

5 cd05 Brass 11 cd11 Nodular cast iron

6cd06 Zinc 12 xxxx Sound velocity

3) Press the Plus button (#3 on page 4) or Minus button (#11 on page 4)

to select the material code of what is being measured. Then press the

Material Selection button (#1 on page 4) to conrm your selection. The

display will show a “0” to indicate you’ve selected your material. If you

select a material code but do not conrm the selection, the code will

automatically change to “0” after several seconds.

4) To select the Sound velocity code, simply continue pressing the Plus or

Minus buttons until you see a 4-digit number in the display. The 4-digit

number represents the last sound velocity measurement taken. When

selecting this velocity, you can measure the thickness of the same

material as the last.

5) It is not necessary to select the material code once the material code is

conrmed (it is automatically stored to the memory of the meter) unless

the material to measure is different from before.

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Calibration Procedures

1) Drop a little oil on the 5 mm Standard block (#12 on page 4).

2) Press the Calibration button (#8 on page 4), the “CAL” symbol will be

shown on the Display. “CAL” is the abbreviation for calibration.

3) Place the Ultrasonic sensor (#9 on page 4) on the Standard block

(#12 on page 4). Verify the coupling is okay by verifying that the Cou-

pling indicator symbol (#6 on page 4) is on. “5.0” mm (or “0.197”

inch) and “CAL” will be shown in the display. When steady, press the

“CAL” button to conrm and then the unit return to the state of mea-

surement.

4) The calibration result will automatically be saved to the unit once

conrmed. It is not necessary to calibrate often unless you suspect the

accuracy of measurements is off.

Measuring Sound Velocity

1) Press the “VEL” button (#4 on page 4) and the display will show the last

velocity measurement.

How to measure the thickness by the known velocity?

2) The velocity can be changed by pressing the Plus or Minus buttons to

the velocity value. The increment is 10m/s every time when pressing the

Plus or Minus buttons. The increment is 100m/s if pressing the Plus or

Minus buttons for more than approximately 4 seconds.

3) Drop a little oil onto the material to be measured and place the

Ultrasonic sensor onto the surface. The reading on the display is the

thickness if it is properly coupled. Therefore, if we know the velocity of

a certain material, it is easy to measure the thickness.

How to measure the velocity with a sample for which you

know the thickness?

2) Find a sample for which you know the thickness.

3) Repeat steps 2 & 3 above until the measurement value is the same as

the known thickness. Therefore the set value is the velocity of the mate-

rial to be measured, by which you can measure any unknown thickness

of the same material.

4) To browse the velocity, press the “VEL” button. To stop browsing, press

the “VEL” button again or wait until the meter automatically shows “0”.

5) By using the velocity measurement, it is easy to measure the thickness

of any hard materials.

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Battery Replacement

1) When the low battery symbol appears in the display,

it is time to replace the batteries.

2) Open the Battery cover (#13 on page 4) and remove the batteries.

3) Install 4 new AA batteries verifying you are following the correct polarity.

For service (repairs or calibration) on this or any other REED product

or information on other REED products, contact REED Instruments at

info@reedinstruments.com.

Notes _________________________________________

________________________________________________

www.reedinstruments.com

1-877-849-2127 | [email protected]

reedinstruments

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Notes _________________________________________

________________________________________________

www.reedinstruments.com

1-877-849-2127 | [email protected]

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