Reed Instruments R7900 Instruction Manual Download Page 9 | Manualshive

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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

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

Teflon

1422

0.058

Water

1473

0.058

continued...

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1.800.561.8187

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Summary of Contents for R7900

Page 1: ...Ultrasonic Thickness Gauge Instruction Manual R7900 www com information itm com 1 800 561 8187...

Page 2: ...Preparing the Measurement Surface 10 Taking Thickness Measurements 10 Auto Power OFF 10 Sound Velocity Measurements of a Material with a Known Thickness 11 Sound Velocity Calibration 11 12 Two Point...

Page 3: ...s Temperature 19 Material with Large Attenuation 19 Measuring Castings 19 Preventing Errors 20 Reference Test Pieces 20 Ultra Thin Material 21 22 Rust Corrosion and Pits 21 Error in Identifying Materi...

Page 4: ...this service will apply Security 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...

Page 5: ...n 1 second Display 4 Digit LCD Backlit Display Yes Probe Length 3 36 Internal Memory Yes up to 500 readings 5 files up to 100 each Low Battery Indicator Yes Power Supply 2 AA Batteries Battery Life Ap...

Page 6: ...n 1 Zero Button 2 Mode Button 3 Down Button 4 Enter Button 5 Up Button 6 Backlight ON OFF Button 7 Power Button 8 Save Browse Button 9 Velocity Button R7900 Ultrasonic Thickness Gauge Ultrasonic Thick...

Page 7: ...ARM F1 5M 1 Measured Value 2 Menu Settings 3 Saved File Name 4 Ultrasonic Sensor Frequency 5 Alarm Thickness Settings 6 Battery Indicator 7 Minimum Capture Mode 8 Coupling Indicator 9 Gain Indicator w...

Page 8: ...proper receiving gain see System Setup for details 3 Coat the 4mm calibration test block with coupling gel R7950 and place the sensor on the calibration test block while ensuring the coupling indicat...

Page 9: ...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 Plexiglass 2692 0 106 Grey Cast 4600 0 180 Po...

Page 10: ...the sensor firmly against the desired measurement area Note For most applications a single droplet of coupling gel is sufficient 3 Verify that the coupling Indicator appears on the LCD display 4 Read...

Page 11: ...ons and press the button to confirm your selection 4 The LCD will display the sound velocity 5 Press the button to save the value if applicable Sound Velocity Calibration 1 Start by performing a zero...

Page 12: ...slightly higher than the tested piece and the thickness of another test piece is slightly lower than the tested piece 2 Before carrying out 2 point calibration turn off the Minimum Capture function a...

Page 13: ...ay the current measurement When it is lifted away it will display the minimum value of the measurement carried out while the MIN Indicator flashes for several seconds Measurements taken during the MIN...

Page 14: ...stem Setup menu 3 When the required setting as shown below is highlighted press the button to select it and toggle between units Note To set brightness press button to enter the setting and use the an...

Page 15: ...to select the required option as shown below Erase File Clears selected files Erase All Data Clears all saved files Erase CAL data Clears calibrating data 4 Press the button again to confirm YES or Me...

Page 16: ...ues 5 If required press the button to erase the current saved value Maintenance Cleaning the Test Piece After taking a measurement clean the test pieces to prevent them from rusting If the pieces are...

Page 17: ...tacts Applications Monitoring and verifying pipes and pressure vessels Industrial manufacturing Accessories and Replacement Parts CA 52A Soft Carrying Case R8888 Hard Carrying Case R7900 PROBE Replace...

Page 18: ...rosstalk interlayer plate should be perpendicular to the axial line of the material under test For a pipe with small diameter the sensor s crosstalk interlayer plate can be both parallel and perpendic...

Page 19: ...ticles and a not so dense structure The attenuation is due to the material s scatter and absorption of sound energy Coarse out phase structures and coarse crystal particles will cause abnormal reflect...

Page 20: ...low limit of the sensor s measuring range you can use a test piece to determine the accurate low limit Never measure a material with a thickness lower than the low limit When the material under test i...

Page 21: ...brate the meter with one material and then measure another material an error will occur Be careful in selecting the correct sound velocity Degradation of Probe The surface of the probe is allyl resin...

Page 22: ...the utilization it will cause an error For most applications a single droplet of coupling gel coated evenly is sufficient When measuring a smooth surface use a gel with low viscosity such as the coup...

Page 23: ...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 Product Disposal and Recycling Please follow local laws and...

Page 24: ...Test Measure with Confidence Check out our latest Products www com information itm com 1 800 561 8187...

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