Reed Instruments R7920 Manual de usuario
Instruction
Manual
R7920
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1 YEAR1AN
Ultrasonic
Thickness
Gauge
REED Instruments
2
Table of Contents
Introduction ................................................................................................ 4
Product Quality........................................................................................... 4
Safety ......................................................................................................... 4
Features...................................................................................................... 5
Included...................................................................................................... 5
Specications............................................................................................. 6
Instrument Description............................................................................... 7
Display Description .................................................................................... 7
Operating Instructions...........................................................................8-12
Initial Calibration .................................................................................... 8
Selecting the Material Sound Velocity ................................................... 9
Preparing the Measurement Surface ..................................................... 9
Taking Thickness Measurements ......................................................... 10
Measurement Methods...................................................................10-11
Determining the Sound Velocity for a Material
with a Known Thickness....................................................................... 11
Auto Power OFF .................................................................................. 11
Enabling/Disabling Alarm Setting......................................................... 12
Data Storage ........................................................................................ 12
Clearing Measurements Results .......................................................... 12
Setup Mode.........................................................................................13-18
Select the Material under Test ............................................................. 13
Adjusting the Sound Velocity of the Material under Test ..................... 14
Select Unit of Measure (in/mm)............................................................ 14
continued...
REED Instruments
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View/Delete Stored Data...................................................................... 14
View from First/Last Page ................................................................ 15
View from Selected Item .................................................................. 15
Delete by Group Range (Delete the Item)......................................... 16
Delete All .......................................................................................... 16
System Settings................................................................................... 16
Enable or Disable the Audible Beep (Sound) ................................... 17
Setting the Backlight Timer .............................................................. 17
Setting the Auto Power OFF Timer .................................................. 17
Setting Alarm Thickness Limits ........................................................ 17
View Device Information ...................................................................... 18
System Reset....................................................................................... 18
Maintenance............................................................................................. 18
Cleaning the Test Piece ....................................................................... 18
Protecting the Ultrasonic Sensor......................................................... 18
Replacing the Ultrasonic Sensor.......................................................... 18
Charging the Battery ................................................................................ 19
Applications.............................................................................................. 19
Accessories and Replacement Parts ....................................................... 19
Product Care ............................................................................................ 19
Appendix A..........................................................................................20-25
Material Sound Velocities Table ......................................................20-21
Measurements on Cylindrical Surfaces................................................ 21
Measuring Compound Profiles ............................................................ 21
Measuring an Un-Parallel Surface........................................................ 22
Influence of Material's Temperature..................................................... 22
Material with Large Attenuation ........................................................... 22
Measuring Castings ........................................................................22-23
continued...
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Preventing Errors ............................................................................23-25
Reference Test Pieces.................................................................23-24
Ultra-Thin Material............................................................................ 24
Rust, Corrosion, and Pits ................................................................. 24
Error in Identifying Material............................................................... 24
Degradation of Probe ....................................................................... 24
Overlapped Material and Compound Material ................................. 25
Influence of Metal Surface Oxidation ............................................... 25
Abnormal Readout of Thickness ...................................................... 25
Utilization and Selection of a Coupling Gel (R7950)......................... 25
Product Warranty ..................................................................................... 26
Product Disposal and Recycling .............................................................. 26
Product Support....................................................................................... 26
Introduction
Thank you for purchasing your REED R7920 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 ISO9001 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.
REED Instruments
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Features
• Measures the thickness of steel, cast iron, aluminum, acrylic resin, red
copper, brass, zinc, quartz glass, polyethylene, PVC, grey cast iron and
nodular cast iron
• Easy-to-read backlit LCD display
• User selectable unit of measure (in/mm)
• Internal memory stores up to 300 measurements
• Displays sound velocity at the touch of a button
• User adjustable High/Low alarms
• Automatic material calibration
• Auto shut off and low battery indicator
Included
• Ultrasonic Thickness Gauge
• Ultrasonic Couplant Gel
• Probe
• USB Cable
• Carrying Case
REED Instruments
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Specifications
Measuring Range: 0.04 to 11.8" (1.00 to 300mm)
Accuracy: <10mm: ±0.1mm
≥10mm: ±(1% rdg. +0.1mm)
Resolution: 0.1mm/0.01mm/0.01"
Velocity Range: 1000 to 9999m/s
(0.039 to 0.394in/µs)
Compatible Materials: Steel, cast iron, aluminum, acrylic
resin, red copper, brass, zinc, quartz
glass, polyethylene, PVC, grey cast
iron and nodular cast iron
Display: 2.4" monochrome dot matrix screen
Backlight: Yes
Probe Length: 3' (91cm)
Probe Diameter: 0.5" (12.7mm)
Internal Memory: Yes (up to 300 readings)
Low Battery Indicator: Yes
Power Supply: Built-in lithium battery
(3.7V 2000mAh)
Battery Life: Approx. 16 hours (Fully Charged)
Product Certications: CE
Operating Temperature: 32 to 104°F (0 to 40°C)
Probe Operating Temperature: 32 to 104°F (0 to 40°C)
Operating Humidity Range: 20 to 80%
Storage Temperature: 14 to 122°F (-10 to 50°C)
Storage Humidity Range: 20 to 70%
Dimensions: 5.5 x 2.6 x 1.12" (140 x 66 x 28.5mm)
Weight: 6.17oz (175g)
REED Instruments
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Instrument Description
1. Probe Connectors
2. LCD Display
3. Measurement Mode/
Menu Button
4. Record/Enter Button
5. Back/Alarm Toggle Button
6. Calibration Test Block
7. Power Button
8. Down Arrow
9. Up Arrow
10. Sound Velocity/
Calibration Button
11. Ultrasonic Sensor
Display Description
1. Coupling Indicator
2. Measurement Mode
Indicator
3. Beep Status Indicator
4. Battery Indicator
5. Unit of Measure
6. Measurement/Sound
Velocity Values
REED Instruments
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Operating Instructions
1. Insert the ultrasonic sensor into the probe connector sockets
on the meter.
2. Press the POWER button to turn the meter ON. Press and hold the
POWER button for approx. 2 seconds to turn the meter OFF.
3. The LCD will display the current set sound velocity.
Initial Calibration
1. Select Single measurement mode by pressing the
MODE/MENU button.
2. Place a small drop of coupling gel (R7950) on the 4mm calibration
test block.
3. Press and hold the m/s/Cal button to enter calibration mode as
conrmed by "Please Calibrate" on LCD display.
4. Place the sensor on the calibration test block while ensuring the
coupling indicator appears on the display.
5. While continuing to hold the sensor on the calibration test block,
press the REC/ENTER button when the reading has stabilized.
6. Depending on the selected unit of measure, either "0.16in"
(or "4.0/4.00mm") and "nished!" will appear on the LCD display.
7. 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.
continued...
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Selecting the Material Sound Velocity
1. While the meter is on, press the m/s/CAL button to enter the
pre-loaded material sound velocities menu.
2. Press the and buttons to scroll through the
pre-loaded material list.
3. Press the REC/ENTER button to conrm the
material selection and press the and buttons
to adjust the sound velocity of the material under
test if required.
Note: Each material has an adjustment velocity range
as shown below.
4. Press the REC/ENTER button again to conrm selection and resume
normal operation.
Preparing the Measurement Surface
1. Clean dust, dirt or rust off the object, and remove any coatings
(i.e. paint).
2. Smooth the surface of the object by grinding or polishing,
alternatively, coupling gel with a high viscosity can also be used.
Important Note: In any ultrasonic measurement scenario, the shape and
roughness of the desired test material are of great importance. Rough,
uneven surfaces will prevent the ultrasonic sensor from seating properly
against the surface, thus limiting the penetration of ultrasound through the
material, resulting in unstable and therefore, unreliable measurements.
continued...
SPD
5920m/s
5720- 6120
Adjustrange 90º
Figure1 Figure2
Figure3
≤5mm
SPD
5920m/s
5720 - 6120
Adjust range
90º
Figure 1 Figure 2
Figure 3
≤5mm
REED Instruments
10
Taking Thickness Measurements
1. Set the sound velocity on the meter (See the Selecting the Material
Sound Velocity section for details).
2. Press the MODE/MENU button to select between Single and
Continuous (Scan) measurement mode (See the Measurement
Methods section for details).
3. Apply coupling gel on the material under test and place the sensor
rmly against the desired measurement area.
Note: For most applications a single droplet of coupling gel is sufcient.
4. Verify that the coupling indicator appears on the LCD display.
5. Read the measurement on the LCD display.
6. When the ultrasonic sensor is removed the value will stay on the LCD
and the coupling indicator will disappear.
7. Press and hold the REC/ENTER button to save the measurement
if applicable.
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 important that the ultrasonic
sensor sits flat against the material.
Measurement Methods
There are four 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°
with respect to the split face (Figure 1). Take
the smaller of the two indicated values as the
thickness of the material.
continued...
SPD
5920m/s
5720 - 6120
Adjust range
90º
Figure 1 Figure 2
Figure 3
≤5mm
REED Instruments
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