DM4E
DM4
DM4 DL
Operating Manual
Operating Manual
for
Ultrasonic Thickness Gauge
Models DM4E, DM4 and
DM4 DL with On-board data Logger
Manual Part No. 021-002-073 REV. S
Copyright 2002 Agfa NDT Inc.
THIS PAGE INTENTIONALLY BLANK
Important Notice
Important Notice
The following information must be read
and understood by any user of a
Krautkramer ultrasonic thickness
gauge. Failure to follow these instructions can lead to errors in thickness
measurements or other test results.
Decisions based on erroneous results
can, in turn, lead to property damage,
personal injury or death.
General Warnings
Proper use of ultrasonic test equipment
requires three essential elements:
•
Selection of the correct test
equipment.
•
Knowledge of the specific “test
application requirements.”
•
Training on the part of the
instrument operator.
This operating manual provides instruction in the basic set up and operation of the Krautkramer thickness
gauge.
There are, however, additional factors
which affect the use of ultrasonic test
equipment. Specific information regarding these additional factors is beyond the
scope of this manual. The operator
should refer to textbooks on the subject
of ultrasonic testing for more detailed
information.
Operator Training
Operators must receive adequate
training before using ultrasonic test
equipment. Operators must be trained in
general ultrasonic testing procedures and
in the set up and performance required
by a particular test. Operators must
understand:
•
Soundwave propagation theory.
•
Effects of the velocity of sound of
the test material.
Behavior of the sound wave
where two different materials are
in contact.
•
•
Areas covered by the sound
beam.
DM4E, DM4, DM4 DL Operating Manual
More specific information about operator training, qualification, certification,
and test specifications is available from
various technical societies, industry
groups, and government agencies.
Testing Limitations
In ultrasonic testing, information is
obtained only from within the limits of the
sound beam. Operators must exercise
great caution in making inferences about
the test material outside the limits of the
sound beam. For example, when testing
large materials it may be impossible or
impractical to inspect the entire test
piece. When a less-than-complete
inspection is to be performed, the
operator must be shown the specific
areas to inspect. Inferences about the
condition of areas not inspected, based
on data from the evaluated areas, should
only be attempted by personnel fully
qualified and trained in applicable
standards of statistical evaluation. In
particular, materials subject to erosion or
corrosion, in which conditions can vary
significantly in any given area, should
only be evaluated by fully trained and
experienced operators.
Sound beams reflect from the first
interior surface encountered. Because
of part geometry and overlapped flaws
or overlapped surfaces, thickness
gauges may measure the distance to an
internal flaw rather than to the back wall
of the material. Operators must take
steps to ensure that the entire thickness
of the test material is being examined.
Ultrasonic Thickness Measurement
Critical Operating Procedures
The following operating procedures must
be observed by all users of
ultrasonic thickness gauges in order to
minimize errors in test results.
1.
Calibration of Sound Velocity
The principle of operation of an ultrasonic thickness gauge is that the instrument measures the time of flight of an
ultrasonic pulse through the test piece
and multiplies this time by the velocity of
sound in the material. Thickness
measuring error is minimized by ensuring
that the sound velocity to which the
instrument is calibrated is the sound
velocity of the material being tested.
Actual sound velocities in materials
often vary significantly from the values
found in published tables. In all cases,
best results are obtained if the instrument is calibrated on a velocity reference block made from the same
material as the test piece; this block
should be flat and smooth and as thick
as the maximum thickness of the test
piece.
Operators should also be aware that the
sound velocity may not be constant in the
material being tested; heat treating, for
example, can cause significant changes
in sound velocity. This must be considered when evaluating the accuracy of the
thickness provided by this instrument.
Instruments should always be calibrated
before testing, and the calibration should
be checked after testing, to minimize
testing errors.
2.
Probe Zero Procedure
The probe zero procedure must be
performed as described in this manual.
The probe zero block should be clean, in
good condition and without noticeable
wear. Failure to properly perform the
probe zero procedure will cause inaccurate thickness readings.
3.
Effects of Temperature on
Calibration
Temperature variations change the
sound velocity of materials and transducer delay lines and, therefore, calibrations. All calibrations should be performed on-site, and with test blocks at
the same temperature as the test piece,
to minimize errors due to temperature
variations.
4.
Transducer Selection
The transducer used in testing must be in
good condition without noticeable wear
of the front surface. Badly worn transducers will have a reduced effective
measuring range. The specified range of
the transducer must include the complete
range of thicknesses to be tested. The
temperature of the material to be tested
must be within the transducer’s temperature range.
5. Use of Couplants
Operators must be familiar with the use
of ultrasonic couplants. Testing skills
Page 1
Important Notice
must be developed so that couplant is
used and applied in a consistent
manner to minimize variations in
couplant layer thickness and errors in
test results. Calibration and actual
thickness being measured. This effect,
commonly known as “doubling,” can
occur below the minimum specified
range of the transducer. If the transducer being used is worn, doubling is
possible at a thickness greater than the
minimum of the specified range.
When using a new transducer, any
reading which is less than twice the
minimum specified range of the transducer may be a “doubled” reading, and
the thickness of the material being tested
should be verified by the use of other
methods. If the transducer shows any
sign of wear, doubling may occur at a
thickness greater than twice the minimum of the specified range. This
thickness should be determined by
calibrating the instrument/transducer
combination on reference blocks that
represent the complete range of possible
thicknesses that may be encountered in
testing. This is particularly important
when the test piece is being ultrasonically
measured for the first time or in any case
where the history of thickness of the test
specimen is unknown.
Page 2
DM4E, DM4, DM4 DL Operating Manual
Table of Contents
Important Notice ....................................................... 1
3.3 Selecting A File ............................................. 17
Table of Contents ...................................................... 3
Warranty / Service ..................................................... 4
3.4 Logging Readings Into Memory ..................... 18
1. Introduction ........................................................... 5
3.5 Selecting Locations ....................................... 18
1.1 How To Use This Manual ................................. 5
3.6 Reviewing Stored Thickness Readings ......... 18
1.2 DM4E, DM4, DM4DL Features ....................... 5
3.7 Clearing and Replacing Readings ................. 19
1.3 How Instrument Measures Thickness .............. 5
3.8 Clearing Selected Files ................................. 19
2. Operation ............................................................... 7
3.9 Clearing Entire Memory ................................ 19
2.1 Battery Installation ........................................... 7
3.10 Permanent Storage ....................................... 19
2.2 Display Symbols ............................................. 7
4. Serial I/O Interface .............................................. 20
2.3 Keyboard Controls ........................................... 8
4.1 The DM4 DL Serial Interface ......................... 20
2.4 Getting Started ................................................ 9
4.2 Setting Baud Rate ......................................... 20
2.5 Calibration To A Known Thickness,1-Point ...... 9
4.3 Report Language Selection ........................... 20
2.6 Calibration To A Known Thickness,2-Point .... 10
4.4 Printing Data ................................................. 20
2.7 Calibration To A Known Velocity .................... 11
4.5 Sending Data To A Personal Computer ......... 21
2.8 Normal Measurement - THK Mode .............. 12
4.6 Importing Data Into A Spreadsheet ............... 22
2.9 Minimum Capture Measurement ................... 12
4.7 Interrupted Transmission Procedure ............. 22
2.10 Receiver Gain Control
(DM4, DM4 DL) ............................................. 12
5. Specifications ...................................................... 23
2.11 Using LO/HI Thickness Limits
(DM4, DM4 DL) ............................................. 13
3.4.1 Recording an OBSTRUCT Value ........ 18
5.1 Instrument Specifications .............................. 23
5.2 Probe Specifications...................................... 24
2.12 Differential Measurement
(DM4, DM4 DL) ............................................. 13
5.3 Dual Multi “Through Coating”Mode Probe .........
Specifications ................................................ 25
2.13 Band Pass Filter Control
(DM4, DM4 DL) ............................................. 14
6. Application .......................................................... 26
2.14 Resolution And Units of Measure .................. 14
6.1.1 Flaws ................................................... 26
2.15 Display Backlight ........................................... 14
6.1.2 Surface Conditions .............................. 26
2.16 Disabling/Enabling Functions ........................ 14
6.1.3 Curved Surfaces ................................. 26
2.17 Recording Measurements
(DM4 DL) ....................................................... 15
6.2 Thickness Meas. On Hot Test Pieces ............. 26
2.18 Dual Multi Measurement Mode
(DM4, DM4 DL) ............................................. 15
6.1 General Notes ............................................... 26
7. Worldwide Service Centers ................................ 28
Appendix A: Displays, Quick Reference ............... 29
2.19 DA3 Operating Mode ..................................... 16
Appendix B: Locations Per File ............................. 33
3. Data Logger Operation ....................................... 17
Appendix C: Operational Software Reset ............. 34
3.1 The DM4 DL Data Logger ............................. 17
Index
...................................................................... 35
3.2 Setting Number of Files ................................. 17
DM4E, DM4, DM4 DL Operating Manual
Page 3
Warranty/Service
Warranty
Service
When used in accordance with the manufacturer’s written
instructions and under normal operating conditions, the
Krautkramer DM4E, DM4, and DM4 DL test instruments
are conditionally guaranteed to be free from defects in
material and workmanship for a period of two (2) years
from date of shipment.
Every effort has been made to provide you with a reliable product. However, should service become necessary, Agfa NDT Inc.
has established a number of Factory Trained Service Centers.
For the location of the nearest facility, refer to Chapter 7 or
contact:
All repair work will be made FOB Lewistown, Pennsylvania, or at a Factory Trained Service Center as advised
by Agfa NDT Inc., provided the defective unit is returned
properly packed with all transportation charges prepaid.
Any and all equipment replacement will be at the sole
discretion of Agfa NDT Inc.
Agfa NDT Inc.
Krautkramer Ultrasonic Systems
Manager of Customer Service
50 Industrial Park Road
Lewistown, PA 17044
This warranty shall not apply to equipment subjected to
misuse or abuse, improper installation, alteration, neglect,
or accident. Excluded from this warranty are expendable
items such as transducers, interconnecting cables, and
batteries. Accessory items such as printers, etc. will be
covered under the original manufacturer’s warranty as given
to Agfa NDT Inc.
This warranty is limited to the original purchaser and is not
transferable. No other warranty, expressed or implied, is
Page 4
DM4E, DM4, DM4 DL Operating Manual
1. Introduction
1.1 How To Use This Manual
•
Automatic probe zero for fast calibration
•
Automatically recognizes DIALOG Intelligent Transducers.
•
Automatic V-path error correction compensates for nonlinearity of dual element probes.
If you are a first time user of the instrument, review Chapter 1 of
this manual to become acquainted with it’s general capabilities.
•
Resolution of .001 in, .01 in, .1 mm, or .01 mm
•
Large, easily read display with backlight
Follow the instructions in Chapter 2 to prepare the instrument for
operation and perform thickness measurements.
•
Automatic gain adjustment
•
Measures a wide range of materials
If you are using a model DM4 DL, Chapter 3 provides detailed information and operating instructions for the on-board data logger.
•
Minimum Capture mode captures thinnest reading
This manual describes the features and operation of the DM4E,
DM4, and DM4 DL (with on-board data logger) Ultrasonic Thickness Gauges.
Chapter 4 describes how to interface model DM4 DL with a variety of external devices, such as a printer or personal computer,
via the serial I/O interface.
Advanced Features of the DM4 and DM4 DL:
•
Manual gain adjustment
•
Dual Multi “Through Coating (Paint)” Measurement Mode
Chapter 5 provides important specifications, particularly Section
5.2, which lists compatible probes (transducers) and their capabilities.
•
Programmable HI/LO thickness limits with LED alarm
•
Differential mode displays the difference between measured
thickness and user-set nominal thickness value.
All users should read “Important Notice” at the beginning of the
manual and Chapter 6, “Application Notes”, for important
information on operator qualification, test conditions, and procedures that affect measurement results.
•
Band Pass Filter selection to match the frequency of the probe
for best performance.
1.2 DM4E, DM4, DM4 DL Features
The DM4E, DM4, and DM4 DL Ultrasonic Thickness Gauges are
hand-held, microprocessor controlled instruments designed for
general thickness measurements on a variety of equipment having access to one side only. It is especially applicable to the
measurement of remaining wall thickness on tubes, pipes, pressure vessels, and other parts subject to wall thickness loss due to
corrosion or erosion.
The on board Data Logger of the DM4 DL improves the reliability
of recording thickness readings by avoiding the errors of misread
and misrecorded data. A total of 5390 readings can be stored in
up to 999 separate data files. Displayed readings are recorded
by simply pressing the SEND key or an optional remote hand or
foot switch. Measurement, statistical and instrument data can
be transmitted via the Serial I/O port, in 80 column format,
to a serial printer or personal computer for documentation,
storage and analysis.
Features of the DM4E, DM4, and DM4 DL:
•
Rugged, sealed case and keypad for reliability
•
Lightweight, ergonomically designed case
•
200 hours on two AA alkaline batteries
•
Five keys (nine keys on DM4 DL) control all functions for simple
operation.
DM4E, DM4, DM4 DL Operating Manual
DM4 DL Data Logging and Communications Features:
•
Stores up to 5390 readings.
•
Memory can be divided into a maximum of 999 separate data
files of equal length.
•
Individual readings or files can be accessed for reviewing,
editing, and clearing data.
•
Serial I/O port provides output to a serial printer or IBM compatible personal computer.
•
Built-in report format includes instrument, inspector, and probe
IDs, settings, statistics, and readings.
•
DM4 DL Data Transfer Utility Software transfers data to an
IBM compatible PC for viewing, printing transfer to other software.
•
UltraMATE® and UltraPIPE® Windows 95/98/NT compatible software programs.
1.3 How DM4E, DM4, DM4 DL Measure Thickness
These instruments operate on the ultrasonic pulse-echo principle,
similar to sonar. A short ultrasonic pulse is transmitted into the
part by a probe (transducer). The pulse travels through the material under test until it encounters an interface, that is a material
with substantially different physical characteristics, such as air or
liquid, at the back surface of the part. At the interface, the pulse
is reflected back to the probe.
Page 5
1.0 Introduction
The time needed for the pulse to make this round trip is divided
by two and multiplied by the velocity of sound in the material
under test. The result is the thickness of the material.
The figure at right illustrates the pulse-echo principle of ultrasonic
thickness measurement.
Dual Element Thickness Measurement
Page 6
DM4E, DM4, DM4 DL Operating Manual
2. Operation
2.1 Battery Installation
NOTE: When low battery indicator lights (below), replace batteries as soon as possible. Automatic shutoff occurs when batteries are too weak for reliable
operation. Settings are saved and restored when
turned on. When testing in remote locations, always
carry spare batteries.
2-PT
2-point calibration mode.
VEL
Velocity display and callibration mode.
MIN
Minimum capture mode
SPEC
Special modes (DM4, DM4 DL) (Sections 2.10
through 2.13 and 2.18)
Display backlight control.
Low battery indicator:
Low barery indicator. Replace batteries when
indicator illuminates as shown.
To install batteries, loosen the two battery cover screws on the
back of the instrument and remove the battery cover.
In dIF mode, reading is greater than nominal.
Insert 2 “AA” alkaline batteries as shown at right. The instrument
is protected against incorrect battery installation. If the batteries
are installed with polarity reversed, no damage will occur, but the
instrument will not operate.
If HI thickness limit is on, reading exceeds limit.
(DM4, DM4 DL)
After batteries have been installed, replace the battery cover and
tighten the screws.
«
In dIF mode, reading is less than nominal. If LO
thickness limit is on, reading violates limit.
(DM4, DM4 DL)
DIALOGIntelligent Transducer automatically
recognized
CAL
Flashes when CAL key is pressed. Scrolling
keys are enabled to adjust displayed value or
control parameter.
Coupling indicator lights when satisfactory
acoustic coupling between the probe and test
piece has been achieved.
in
Unit of measure of displayed value is inches
(in/µs in VEL mode).
Mm
Unit of measure of displayed value is millimeters
(m/s in VEL mode).
Note: To charge the unit of measure and display
resolution refer to Section 2.14.
2.2 Displays Symbols
THK
Thickness measurement and standard 1-point
calibration mode.
THK
SPEC
Dual Multi “Through Coating (paint)”
measurement mode.
DM4E, DM4, DM4 DL Operating Manual
Page 7
2.0 Operation
2.3 Keyboard Controls
NOTE: SEND, C/OBST, MEM, and FILE keys
are DM4 DL only.
DM4 DL Data Logging and Communication Keys
Activates the scrolling keys to select a file
(File Select) or, if Data Logger memory is
clear, setting the number of files. Setting
number of files can only be performed when
the entire memory is clear.
Transmits data to the on board Data Logger,
or to an external device via the Serial I/O
port. The function of the SEND key is
dependent upon the type of cable connected
to the Serial I/O port:
No connection - SEND is active in all measurement modes. Displayed thickness is sent
to the on board Data Logger, if configured.
DR1 Data Recorder connected - SEND is
active in THK (Thickness), and MIN (Minimum Capture) modes. Displayed thickness
is sent to the DR1.
Instrument Control Keys
Turns on the instrument. When on, activates CAL
(calibration) mode and enables scrolling keys
Selects the operating mode - THK, 2-PT, VEL,
MIN, SPEC, and . Multiple presses activate
modes from left to right, and from back to THK.
The SCROLLING keys, when enabled by the
CAL key, change the displayed value or instrument control option.
When enabled by the FILE key, they are used to
set the number of Data Logger files and select
files.
RS232C peripheral connection (PC/software,
printer, data logger, etc.) - Pressing SEND in
any measurement mode transmits the displayed value. Pressing SEND during the File
Select function transmits the displayed file or
all files. Second push of SEND aborts the transmission.
Provides access to the selected file of the onboard Data Logger for selecting locations and
reviewing stored thickness readings.
Clears the data logger readings, files, or entire
memory. Displays “OBSTRUCT” value, when
probe is uncoupled, to be sent to active data
logger location. Refer to Chapter 3 for detailled
instructions.
Sets the Dual element Multi-echo mode for through
coating measurements. A second press turns off
Dual-Multi mode and returns the instrument to conventional thickness measurement mode.
When enabled by the MEM key, they are used to
select file locations and review readings stored in
memory.
NOTE: The scrolling keys are also used to
change the resolution and unit of measure by
pressing both keys simultaneously in THK
mode (CAL indicator must be off)
Page 8
DM4E, DM4, DM4 DL Operating Manual
2.0 Operation
Model DM4
Model DM4E
2.4 Getting Started
2.5 Calibration to a Known Thickness, 1-Point
Read “Important Notices” at the beginning of this manual, and
Chapter 6, “Application Notes,” for important information on test
conditions that affect measurement results.
Select a suitable probe (Section 5.2) and connect it to the probe
connector on the top panel. See Section 4.3 to select a report
language other than English.
Press
Model DM4 DL
to turn on the instrument. The model and display
annunciators are briefly displayed as shown above, followed by
the current software revision number. Then, the operating mode
and settings from the last session are restored. NOTE: If using
a NON-DIALOG KBA560 Family Probe (i.e. KBA560, KBA560WR, KBA560-V) or DA301
Probe, either P560 or P301 may be displayed. If this occurs,
the user must tell the instrument which probe is connected by
toggling with the Up and Down arrow keys to select P560 for a
KBA560 style probe or P301 for the DA301 probe, and press
the CAL/ON key to perform the probe zero procedure and operate the instrument.
Automatic shut-off occurs after 3 minutes of inactivity.
Coupling probe or pressing a key restarts the timing.
To change the unit of measure or select a different display
resolution setting refer to Section 2.14.
If low light makes the display difficult to read, refer to Section
2.15 for instructions on using the backlight.
Before taking measurements, perform 1-point calibration
(Section 2.5) or 2-point calibration (Section 2.6).
NOTE: DM4E, DM4 and DM4 DL feature automatic probe
zero for standard probes and automatic probe recognition for
DIALOG Intelligent Transducers.
NOTE: A calibration standard of the same material and
velocity of sound as the material to be measured is required . For best results, the thickness of the calibration
standard should be equal to, or slightly greater than the
thickest part to be measured.
NOTE: Wipe face of probe clean before turning on instrument or connecting probe to instrument for best Automatic
Probe Zero results.
1-point calibration can only be performed if 2-PT mode is
OFF (Section 2.6).
If necessary, press
Press
until THK is displayed.
. All symbols and “PO” are briefly displayed. Take
no action until “PO” disappears indicating Automatic Probe
Zero is complete. With CAL flashing, couple the probe to the
calibration standard. Be sure the coupling indicator (
)
lights and the reading is stable, as in Figure 2-3. The displayed value may not match the known thickness of the calibration standard at this point. You may keep the probe coupled
or uncouple the probe and wipe the excess couplant from the
probe face.
Use
and
to adjust the displayed value to match the
thickness of the calibration standard. Scrolling speed accelerates as
the key is held. If a key is released for less than 1 second, scrolling
will resume at the same speed. Figure 2-4 shows how the display
should appear with a 0.200 inch calibration standard.
Press
again to end the calibration procedure.
Proceed to Section 2.8 for normal thickness measurement (THK
mode) procedure.
Figure 2-3
Figure 2-4
DM4E, DM4, DM4 DL Operating Manual
Page 9
2.0 Operation
2.6 Calibration to a Known Thickness, 2-Point
NOTE: Requires two calibration standards (or one standard with two thicknesses) of the same material, velocity,
and curvature as the material under test.
For best results, the thicker standard should be equal to, or
slightly greater than the maximum thickness to be measured.
The thickness of the thin standard should be as close as possible to the lower end of the expected measurement range.
If necessary, press
until 2-PT (2-point calibration mode)
Figure 2-7
Press
again. The prompt to couple to the “HI” (thick) cali-
bration standard is displayed Couple the probe to the thick calibration standard. Again, be
is displayed.
sure the coupling indicator (
) lights and the reading is stable.
to display current status, On or Off.
Press
Use
and
to adjust the displayed value to match the
thick calibration standard.
Press
Figure 2-5
Use
Press
or
to exit 2-point calibration mode. The 2-PT indicator
remains illuminated (Figure 2-7) to show that the current calibration is 2-point and that automatic probe zero,
to enable 2-PT (On as in Figure 2-5).
again. The 2-PT indicator now flashes and the
prompt to couple to the “LO” (thin) calibration standard appears,
as shown in Figure 2-6.
Figure 2-8
1-point calibration, and velocity calibration functions are disabled.
The 2-point calibration procedure is complete and the instrument
is ready for thickness measurement (Section 2.8).
To disable 2-PT calibration mode:
To disable 2-PT calibration, press
and use
or
Figure 2-6
to change the status to OFF (Figure 2-8).
Couple the probe to the thin calibration standard. Be sure the
The CAL and 2-PT indicators are turned off and the instrument
returns to THK mode.
coupling indicator (
) lights and the reading is stable. You
may keep the probe coupled or uncouple and wipe the excess
couplant from the probe face.
Use
and
to adjust the displayed value to match the
thickness of the thin calibration standard.
Page 10
DM4E, DM4, DM4 DL Operating Manual
2.0 Operation
Figure 2-9
2.7 Calibration to a Known Velocity
Figure 2-10
NOTE: 2-PT calibration mode must be set to OFF.
If you know the velocity of sound of the material to be measured,
the instrument can be calibrated to the known velocity without
the use of a calibration standard. However, the calibration should
always be verified by measuring a known thickness (or calibration standard) of the same material and velocity as the material
to be measured.
With the CAL indicator flashing, use
and
to set the
displayed velocity to that of the material under test.
Figure 2-10 shows how the display would appear for a calibration of .2328 inches per microsecond.
Press
again to exit velocity calibration mode and return to
THK mode.
To calibrate to a known velocity, press
until VEL illuminates.
The current velocity setting is displayed, as illustrated in
Figure 2-9.
Press
Table 2-1, below, shows typical sound velocities for some common materials. Because processing, exact composition, and temperature affect velocity, the values may not precisely match the
velocity in the material to be measured.
to enable calibration mode.
Table 2-1: Typical Sound Velocities in Various Materials (Longitudinal Wave)
Material
in/µs
m/s
Aluminum
Brass
Cadmium
Cast Iron
Copper
Epoxy Resin
Glass (Crown)
Glass (Window)
Gold
Inconel
Lead
Magnesium
Manganese
Molybdenum
Monel
Neoprene
Nickel
.2500
.1700
.1100
.1800
.1800
.1100
.2200
.2700
.1300
.2200
.0850
.2300
.1800
.2500
.2100
.0630
.2200
6300
4300
2800
4600
4600
2800
5600
6800
3300
5600
2200
5800
4600
6300
5300
1600
5600
Material
in/µs
m/s
Nylon
Phenolic
Platinum
Plexiglas
Polyethylene
Polystyrene
Polyurethane
Porcelain
Rubber (Butyl)
Rubber (Vulc.)
Silver
Steel
Tin
Titanium
Tungsten
Zinc
Zircaloy 2
.1000
.0560
.1600
.1100
.0700
.0930
.0700
.2200
.0730
.0900
.1400
.2300
.1300
.2400
.2100
.1600
.1900
2500
1400
4100
2800
1800
2400
1800
5600
1900
2300
3600
5800
3300
6100
5300
4100
4700
NOTE: This information is provided for the convenience of the user and Agfa NDT Inc. assumes no responsibility for inaccuracies. Actual velocities depend on exact composition, temperature, and processing of each material.
DM4E, DM4, DM4 DL Operating Manual
Page 11
2.0 Operation
2.8 Normal Thickness Measurement - THK Mode
This procedure applies to parts with ambient surface temperatures. Refer to Section 6.2 for information on taking measurements on hot surfaces.
Be sure that the instrument is on and that the appropriate calibration procedures in Section 2.5, 2.6, or 2.7 have been completed
for the selected probe type and material to be measured.
If using the alarm feature (DM4 and DM4 DL), make sure the
correct LO and HI limits are set and the alarm is on (Sect. 2.11).
MIN mode is used to capture the thinnest value during a series of
readings or rapid sequence of measurements. The measurement updates at high speed to assure detection of thinnest value
during the cycle.
When the probe is uncoupled, the detected minimum is displayed
and MIN flashes to indicate that the time-out sequence has begun. Recoupling the probe while MIN is flashing allows the capture cycle to continue.
Remove any dirt, loose scale, or flaking from the test surface
and spread a thin layer of couplant on it.
Figure 2-14
To end the capture cycle, uncouple the probe for at least the
number of seconds set in the current time-out setting, that is, until
MIN stops flashing. Coupling the probe begins a new minimum
capture cycle.
Figure 2-11
Place the probe gently but firmly on the surface. The coupling
indicator ( ) must light, as in Figure 2-11. Use firm, steady pressure to obtain a stable reading.
Setting MIN Time-Out:
The digital thickness reading can be read from the display while
coupled, or the probe can be uncoupled and the last reading will
be held on the display.
instrument in MIN mode, press
The MIN time-out is adjustable from 1 to 5 seconds. With the
to display the current time-
out setting in seconds (Figure 2-13). Use
or
to
select a new setting (Figure 2-14).
Press
again to activate the new time-out setting and
return to MIN mode for minimum capture measurement
Figure 2-12
2.10 Receiver Gain Control (DM4, DM4 DL)
If incorrect values occur repeatedly, check probe selection
(Sect. 5.2) or contact your Agfa NDT Inc. representative.
NOTE: If a reading is not possible due to low signal caused
by poor coupling or high material attenuation, or if “doubling”
is detected (see page 3), the coupling indicator will not light
and the display will not update.
The DM4 and DM4 DL have four gain setting options, Automatic,
High, Medium, and Low. The default is Automatic, which automatically selects a gain setting based on the velocity value.
until SPEC illuminates.
To change the gain setting, press
Press
or
Press
to display current setting:
until
appears in the display.
Automatic gain
High gain
Figure 2-13
Medium gain
Low gain
2.9 Minimum Capture Measurement
Use
To enable the minimum capture mode, press
illuminates.
Page 12
or
to select a new setting.
until MIN
DM4E, DM4, DM4 DL Operating Manual
2.0 Operation
2.12 Differential Measurement (DM4, DM4 DL)
Press
again to exit the gain select function.
When the instrument shuts off, current setting is saved and restored when the instrument is turned on again.
Differential measurement mode displays the difference between
the measured thickness and a nominal value set by the user. To
enter dIF mode, press
or
Then press
until
or
to turn differential mode On and Off
2.11 Using LO / HI Thickness Limits (DM4, DM4 DL)
Setting the Nominal Value:
WARNING: If a file containing normal thickness (THK) data is
currently active, changing the LO or HI limit replaces any settings previously stored in the file.
Press
LO and HI limits identify readings that violate user set lower and
upper limits. When LO and/or HI limits are set, a reading that
violates either causes the red LED (front panel) to light.
Use
A flashing plus sign (Figure 2-15) indicates the reading exceeds
the HI limit. A flashing minus sign (Figure 2-16) indicates a reading that is less than the LO limit.
To set and enable LO and HI limits press
appears in the display.
to display current status, On or Off. Use
Press
Figure 2-15
until SPEC illuminates.
until SPEC illumi-
nates.
to display the current nominal value setting.
or
return to
to set the desired value. Press
again to
display.
To perform differential measurement, with dIF mode On, return
to THK mode
Section 2.8.
and follow the measurement procedure in
Figure 2-17
Figure 2-16
Press
or
until
per limit) appears in the display.
Press
(lower limit) or
to display current status, On or Off. Use
(up-
Figure 2-17 shows a differential reading that is 0.059 inch greater
than ( ) the user set nominal value. In Figure 2-18 the actual
measurement is 0.003 inch less than ( ) the nominal.
or
To disable differential measurement, follow the procedure at the
beginning of this section.
to turn either alarm mode On or Off.
Setting LO and HI Limits:
With the desired alarm mode On, press
rent limit setting. Use
0.5 to 500 mm). Press
display. Press
or
to display the cur-
to set the limit (0.020 to 20.00";
again to return to
Figure 2-18
or
to return to THK mode.
DM4E, DM4, DM4 DL Operating Manual
Page 13
2.0 Operation
2.13 Band Pass Filter Control (DM4, DM4 DL)
2.15 Display Backlight
The Band Pass Filter control of the DM4 and DM4 DL sets the
band pass of the instrument receiver for the frequency of the
connected probe. The default setting is HI for probes of 2 MHz
to 10 MHz frequency.
To change the Band Pass Filter setting, press
Three available backlight options are:
Backlight disabled; maximum battery life
Backlight is on continuously; less battery life
until SPEC
Automatic Backlight; backlight activates when probe
is coupled or key is pressed and remains on for 5
seconds
illuminates.
Press
or
Press
to display current setting:
until
appears in the display.
To change the backlight setting, press
until
illuminates.
High - 2 MHz to 10 MHz
Use
or
to display the current setting.
Press
Low - 300 KHz to 2 MHz
to select the desired setting.
Use
or
to select a new setting.
again to exit the gain select function.
Press
Press
When the instrument shuts off, the current Band Pass Filter setting is saved and restored when the instrument is turned on again.
again to exit the backlight function.
When the instrument shuts off, the current backlight setting is
saved and will be restored when the instrument is turned on again
2.14 Display Resolution and Unit of Measure
2.16 Disabling/Enabling Functions
Four display resolution settings are available, two in inch units
and two in metric units, as shown below.
Specific instrument functions and modes can be disabled so that
they are not available during normal operation. They can also be
enabled again.
Inch Settings:
The following functions can be disabled/enabled:
(Default)
2-point calibration
Velocity mode
Metric Settings:
Minimum capture mode
Entire SPEC menu (DM4, DM4 DL)
Gain function (DM4, DM4 DL)
To change display resolution or unit of measure, press both
and
at the same time. Keep pressing both keys
until the desired setting is displayed.
Low limit alarm mode (DM4, DM4 DL)
High limit alarm mode (DM4, DM4 DL)
Differential mode (DM4, DM4 DL)
Band Pass Filter Control (DM4, DM4 DL)
In VEL mode, with CAL off, simultaneously pressing
and
To disable or enable one or more of the above, press
and
switches between inch and metric units. Velocity will
bedisplayed in the newly selected units.
When the instrument shuts off, the resolution setting is saved
and restored when the unit is turned on.
Page 14
simultaneously while the instrument is off and hold both
keys for 3 seconds..
DM4E, DM4, DM4 DL Operating Manual
2.0 Operation
After briefly displaying the instrument version and display indicators, the first mode is displayed:
Use
or
to scroll through and select the function or
mode to be disabled or enabled.
Figure 2-20
When the desired function or mode is displayed, press
to
display the current setting, On or OFF.
Use
or
to disable (OFF) or enable (On) the displayed
function or mode.
again. The function or mode that has been acted
Press
upon will be displayed.
Use
or
to scroll through and select another function
When a reading is sent to an empty file, the current settings of
the HI/LO limits are saved with the file. Selecting an existing file
automatically activates the limits saved with the file. The settings
may be changed (Section 2.11). However, the previously saved
settings will be replaced in the file by the new ones.
When a differential reading (Section 2.12) is sent to an empty
file, the current setting of the nominal value is saved with the file.
Selecting a file with differential readings automatically activates
differential measurement mode and restores the saved nominal
value. The nominal value saved in a file may not be changed.
2.18 Dual Multi Measurement Mode (DM4, DM4 DL)
or mode to be disabled or enabled or press
to end the pro-
cedure.
NOTE: Disabled modes and functions will automatically
be set to their default settings.
Protective coatings, including paint, contribute significant error to
the thickness measurement of the underlying metal when using
conventional measurement techniques.
The Dual-Multi mode eliminates coating layers from the measurement by measuring between successive backwall reflections
of the metal.
The Dual-Multi mode works with the following standard probes:
KBA560 Family, DA312, DA301, DA311, DM401
Figure 2-19
2.17 Recording Measurements (DM4 DL)
Displayed thickness readings are sent to the on-board Data Logger of the DM4 DL and most external recording devices by pressing
. See Chapter 4 for details on connecting external de-
vices to the DM4 DL.
To record readings in the on-board Data Logger, follow the instructions in Chapter 3 to set up the Data Logger.
The measurement range for each probe will vary depending upon
the type and thickness of the coating, the thickness of the metal,
and the quality of the bond between the coating and metal.
To activate or deactivate the Dual-Multi mode, press
.
The THK and SPEC annunciators will illuminate to indicate that
the DUAL MULTI mode is activated. See figure 2-21. NOTE:
The SPEC annunciator will not illuminate unless one of the
above compatible probes is attached. If the DUAL MULTI key
is pressed when a non-compatible probe is connected, “nO”
will briefly be displayed and then the instrument will return to
the standard (THK) thickness mode.
To record a reading, first perform the measurement. When the
coupling indicator ( ) lights (Figure 2-19) and the reading is stable,
uncouple the probe and wipe the excess couplant from the probe
face.
Press
. The location where the reading has been stored is
displayed briefly (Figure 2-20). After a displayed reading has
been sent, the SEND key is disabled until a new reading is taken.
Zero values cannot be recorded.
Figure 2-21
DM4E, DM4, DM4 DL Operating Manual
Page 15
2.0 Operation
The coupling indicator (
) will illuminate only when two backwall
The use of a DIALOG Intelligent Probe automatically selects either the standard “AUTO” or “DA3” mode.
echoes are detected.
In the event two backwall reflections are NOT detected:
The coupling indicator (
) will not illuminate.
A row of dashes will be displayed.
The red LED will flash.
If a Dual-Multi measurement is not obtainable, the operator must
return the instrument to the standard thickness measurement
mode by pressing
To select the DA3 mode when using non-dialog probes or to override the last selection:
and/or remove the coating.
Note: Complete removal of the coating may not be necessary. First try smoothing the surface and removing any loose
top layers.
NOTE: If two backwall echoes are attainable on the calibration standard, a 1-Point Calibration can be performed in the
DUAL MULTI Mode. Press the DUAL MULTI key, verify that
both THK and SPEC are illuminated in the display, and refer to
section 2.5 ( 1-PT Calibration) beginning with “Press CAL/ON
KEY.”
Press
to turn the instrument on.
The model and display annunciators are briefly displayed (see
section 2.4 Getting Started), followed by the current software
revision number. Then, the operating mode used from the last
session is displayed. It will flash for approximately 3 seconds.
While the display is flashing, press
to toggle between AUTO
mode and DA3 mode.
Press any other key to start instrument operation using the selected mode. If no key is pressed within 3 seconds, the instrument will go into operation with the last selected zero mode.
CAUTION: Only DA Series Probes are to be used in the DA3
Operating Mode.
2.19 DA3 Operating Mode
This mode is characterized by the implementation of “on-block
zero”. This means that the acoustic zero point is dynamically
adjusted during the measurement process, compensating for
wear and “growth” during measurements.
This mode may offer advantages for certain applications such as
high temperature measurements.
Page 16
DM4E, DM4, DM4 DL Operating Manual
3. Data Logger Operation
3.1 The DM4 DL Data Logger
The DM4 DL on-board Data Logger provides a simple, reliable
way to record thickness measurements. Readings are stored in
one or more files by pressing the SEND key. A file is a number
of Data Logger memory locations that have been grouped together for storing readings, one reading per location, and reporting measurement data.
WARNING: Clearing memory permanently erases all readings stored in the DM4 DL Data Logger.
File size is determined automatically when the operator sets the
desired number of files, up to a maximum of 999. The DM4 DL
divides the total memory capacity, 5390 readings, by the number
of files specified and creates the maximum number of files, of
equal size, that Data Logger capacity allows.
The first reading is stored in each file starting with location number 1, unless the operator selects a different starting location.
Subsequent readings are stored sequentially until the last location has been filled or another file is selected to receive readings.
Location numbers and stored readings can be viewed and edited in the display. Individual file locations, entire files, or entire
memory can be cleared. Single files, or all files, can be transferred via the Serial I/O port to a printer or IBM compatible PC.
Report format is compatible with most serial printers. A utility
program is available from Agfa NDT Inc. for transferring data to
a PC (Section 4.5). Individual readings and velocity can be
sent to the Krautkramer DR1 Data Recorder. Refer to Chapter
4 for information on connecting external devices.
Stored readings are retained indefinitely in the memory of the
DM4 DL, even when the batteries are removed. However, backup
is recommended whenever possible.
The following Data Logger operations are described in Sections
3.2 through 3.10:
Setting Number of Files
Selecting a File
Logging Readings into Memory
Selecting Locations
Reviewing Stored Readings
Clearing and Replacing Readings
Clearing Selected Files
Clearing Entire Memory
Permanent Storage
Section 3.2
Section 3.3
Section 3.4
Section 3.5
Section 3.6
Section 3.7
Section 3.8
Section 3.9
Section 3.10
Readings can not be stored until the desired number of files has
been set and one file has been selected to receive readings.
Follow the procedure in this section to set the number of files and
the size of each.
Setting number of files can only be done when entire memory is
. C.ALL (Figure 3-
1) indicates memory is clear. If memory is not clear, refer to
Section 3.9 for instructions on clearing memory.
DM4E, DM4, DM4 DL Operating Manual
While C.ALL (Figure 3-1) is displayed, use
or
to set
the desired number of files (1 is the minimum): “n.001” = 1 file,
“n.002” = 2 files, etc.
to terminate the procedure. “ConF” is displayed
Press
while memory is being configured.
The number of files set determines the size of each file, that is,
the number of available locations. Appendix B provides a table
showing the number of locations per file based on the number of
configured files, 1 through 806.
NOTE: DIALOG Intelligent Transducer I.D., LO limit, HI
limit, and dIF value are saved with each file.
To log readings a file must be selected (ref. Section 3.3).
Default selection is File 1, Location 1.
Figure 3-2
3.3 Selecting a File
Before measurements can be logged, a file must be selected
(Section 3.2). Press
3.2 Setting Number of Files
clear. To check memory status, press
Figure 3-1
to display the active file number. If no
file has been selected, “-F.001” is displayed (Figure 3-2). If “C.ALL”
is displayed, no files exist. Return to Section 3.2.
Use
or
to change the active file number. Scrolling
above the highest number loops to “.ALL” (all files) and back to
File 1. Scrolling below File 1 loops through “.ALL” to the highest
file number.
indicates empty file, no readings.
indicates active file with readings but not full.
Page 17
3.0 Data Logger Operation
3.4.1 Recording an OBSTRUCT Value
indicates a full file, no empty locations.
If a measurement cannot be made or a location is inaccessible,
an “OBSTRUCT” value can be logged into the current active location.
“nnn” (001 to 999) is the number of the selected file.
When the desired file number is displayed, press
again.
The current active location number of the selected file is
displayed briefly. Then the DM4 DL returns to measurement
mode and is ready to log readings
with the probe un-
While in THK or MIN mode, press
, where the OB-
coupled. The location number,
STRUCT was stored is briefly displayed, followed by
NOTES: When a file containing differential readings is
selected the DM4 DL switches to dIF mode and uses the
nominal value saved in the file as the current nominal value.
When a file containing HI/LO thickness limits is selected the
DM4 DL switches to THK mode and uses the limits saved in
the as the current limits.
When a file contains data collected using a DIALOG Intelligent Transducer, report sent to a printer or computer automatically include the model and serial numbers of the probe.
An “OBSTRUCT” is stored in the current data logger location.
When reviewing stored readings (Section 3.6) obstructed
locations display
.
3.5 Selecting Locations
While in THK or MIN mode, the MEM key is used to select file
locations and review stored readings.
To select a location in the current file, press
.
The current location number is displayed as
cation, as in Figure 3.4) or
Use
Figure 3-3
or
(full lo-
(empty location).
to display the desired location.
To review stored readings, proceed to Section 3.6.
To select the displayed location and return to THK or MIN mode,
3.4 Logging Readings into Memory
Measurements taken in THK (normal), dlF (differential), and MIN
(minimum capture) modes can be stored in the Data Logger if a
file with at least one empty location has been selected (Section
3.3). The Data Logger is disabled when an external recording
device is connected to the Serial I/O port (Chapter 4).
A reading is logged by pressing
.
two times.
press
(Section 2.17). If the
current file location is empty, the Data Logger stores the reading
and briefly displays the location number, “L.nnn” (Figure 3.3) as
confirmation.
After a displayed reading has been sent, the SEND key is
disabled until a new reading is taken. Unless a valid thickness
reading is in the display, no action occurs when SEND is
pressed. Zero values will not be logged. All readings in a
given file should be stored at the same resolution to assure
accurate statistics.
Figure 3-4
3.6 Reviewing Stored Thickness Readings
While a location number is displayed, as in Figure 3-4, press
a second time to display the reading. Readings are displayed in the current unit of measure.
Use
or
to view readings at other locations.
displays when trying to log to a locaLocation Full:
tion that contains a reading. No data is recorded. To select an
empty location see Section 3.5.
File Full:
displays when SEND is attempted to a file
with no empty locations. No data is recorded. To select another
file, refer to Section 3.3.
Page 18
Figure 3-5
DM4E, DM4, DM4 DL Operating Manual
3.0 Data Logger Operation
A row of dashes (Figure 3-5) indicates an empty location.
indicates an obstructed location. A flashing plus sign
indicates the reading exceeds the HI limit stored with the file. A
flashing minus sign indicates a reading that is less than the LO
limit. “Err” (unlikely to occur) indicates that the reading has
been corrupted in memory and must be retaken.
Press
Press
to return to measurement mode, or use
or
to select another file.
again to return to measurement mode.
Figure 3-8
3.9 Clearing Entire Memory
WARNING: This operation permanently erases all readings stored in the Data Logger of the DM4 DL.
Figure 3-6
3.7 Clearing and Replacing Readings
To clear and reset memory, press
While a stored thickness reading is displayed (Section 3.6), the
C/OBST key (C = Clear) can be used to erase the reading from
that location.
To clear a stored reading, display the reading to be cleared (Sect.
mode. Use
Press and hold
3.5 and 3.6) and press
. When the reading has been
cleared, dashes appear (Figure 3.6).
Press
to return to measurement mode. A new reading can
now be logged to the cleared location.
NOTE: “ Obstructed” locations do not need to be cleared.
Sending a thickness value automatically overwrites the
stored ObSt.
or
while in THK or MIN
to display “.ALL” (Fig. 3-8).
for 3 seconds. When memory is clear, the
display changes to “C.ALL” (Figure 3-9).
Data Logger memory is now clear. Readings can not be recorded until new files have been configured.
Follow the procedure in Section 3.2 to create new files and prepare the Data Logger to record readings.
Figure 3-9
Figure 3-7
3.10 Permanent Storage
3.8 Clearing Selected Files
WARNING: This operation will permanently erase all
readings in the cleared file.
Press
while in THK or MIN mode. The active file is dis-
played (Section 3.3). Use
or
to select the file to be
cleared.
Press and hold
for 3 seconds. DM4 DL briefly displays
Stored readings are retained in memory indefinitely, even when
the batteries have been removed. However, data could be lost
or corrupted if the DM4 DL were damaged or exposed to extreme environmental conditions.
For extended storage, files should be transferred to a computer
for storage on disk or tape. The DM4 DL Data Transfer Utility
program is available for this purpose. Contact your local Agfa
NDT Inc. representative for information.
Chapter 4 provides information needed to interface the DM4 DL
with an external device, such as a printer or computer, for file
storage.
“C.nnn” (Figure 3-7). “nnn” is the cleared file number. Then “F.nnn” is displayed (empty file, Figure 3-2 on page 31).
DM4E, DM4, DM4 DL Operating Manual
Page 19
4. Serial I/O Interface
4.1 The DM4 DL Serial Interface
The 7-pin Lemo #0B connector the top panel of the DM4 DL, is
the Serial I/O port. It is used to transmit readings and statistical
data to an external device, such as a printer or a personal computer.
For simple communication with a PC, an optional DM4 DL Data
Transfer Utility Program is available for use with any IBM PC, XT,
or AT compatible computer with at least 256K of available memory
and DOS version 3.3 or higher. Contact Agfa NDT Inc., or your
local representative for information.
Press
or
to select
.
Press
to display the current setting.
Press
or
Press
again to exit.
to select the new setting.
Available RS232 baud rate settings are 1200, 2400, 4800, and
9600.
The type of device connected to the Serial I/O port determines
the status of the on board Data Logger and how the DM4 DL
responds when the SEND key is pressed. Special cables, available from Agfa NDT Inc., must be used when connecting external devices to assure proper operation and transfer of data.
Table 4-1 summarizes the Data Logger and SEND operations of
the DM4 DL, based on the device connected.
Figure 4-1
Table 4-1: Data Logger and SEND Operation,
Based on Device Connected
4.3 Report Language Selection
Connected
Device
Data Logger
Operation
SEND
Operation
To change report language, press
No Device
Enabled
Logs displayed thickness
in DM4 DL memory
DR1 Data
Disabled
Sends displayed thickness or velocity to DR1
Recorder*
RS232C Device*
(PC, printer,
RS232 data
logger, etc.)
Read Only
Sends displayed
thickness, material
velocity, a selected
file, or all files to peripheral device
or
and then
to display the
current setting (Fig. 4-1).
Press
or
to select the new setting.
Options are:
- English
*Special cable required; available from Agfa NDT Inc.
NOTE: DM4 DL should be off when connecting a cable
for an external device to the I/O port.
to select
to display SPEC. Use
- Spanish(Español)
- German (Deutsch)
- Russian
- French (Francais)
- Japanese
- Italian (Italiano)
Press
again to exit
4.2 Setting Baud Rate
To enable communication between the DM4 DL and a printer,
computer, or other device, the baud rate must be set to match
that of the connected device.
Default RS232 protocol of the DM4 DL is as follows:
Baud Rate:
Data Bits:
Stop Bits:
Parity:
9600
8
1
NONE
Figure 4-2
4.4 Printing Data
Baud rate is adjustable. All other parameters are fixed.
To change the baud rate setting, press
nates.
Page 20
until SPEC illumi-
Data Logger files can be transferred to a printer. Output is compatible with most 80 and 132 column serial printers. With the
DM4 DL off, connect the printer to the I/O port using the DM4 DL
- Printer cable from Agfa NDT Inc. If necessary, follow the
procedure in Section 4.2 to set baud rate to match that of the
printer.
DM4E, DM4, DM4 DL Operating Manual
4.0 Serial I/O Interface
Selecting Printer Driver:
Before printing, the appropriate printer driver must be selected.
Press
If the printer is accidentally disconnected during transmission,
follow the procedure in Section 4.7 to avoid losing data. When
to exit or use
printing is done, press
until SPEC illuminates.
or
to select
another file.
Press
or
to select
(Figure 4-2), then
Printed files remain in memory after printing has been completed. Individual readings can be sent to a printer simply be
to display the current setting.
or
Use
pressing
to select:
4.5 Sending Data to a Personal Computer
- Epson FX 850 with 8148 serial interface
Stored thickness data can be transmitted to an IBM compatible
computer. Files are transmitted as ASCII text files. Once saved
on disk, data can be viewed on screen, printed, or transferred to
standard word processing, data base, spreadsheet, and applications software. The ASCII format also simplifies the transfer of
data for users who wish to use standard communications software or write their own.
- Seiko DPU 411
- 24 column DATAMATE format
- Spreadsheet
Press
again to exit.
Printing File Header Information:
To print file header information with the file, with SPEC illuminated, press
or
to select
, then
to
display the current setting, On or OFF.
or
If OFF, press
Press
when the desired thickness value is displayed.
to set file header On.
The DM4 DL Data Transfer Utility Program is available to
simplify the transfer of data to the PC. This simple utility can
be used with any IBM PC, XT, or AT compatible computer with
at least 256K of available memory and DOS version 3.3 or
higher. Contact Agfa NDT Inc. or your local representative for
information.
again to exit.
Printing Statistics:
To print statistics with the file, with SPEC illuminated, press
or
to select
. Press
to display the current
setting, On or OFF.
If OFF, press
or
to set file statistics On.
To print files DM4 DL must be in THK or MIN mode.
Press
and use
or
to select the file to report per
Section 3.3, or scroll to .ALL to print all files that contain data.
Press
Figure 4-3
Connect the DM4 DL to PC cable, available from Agfa NDT
Inc., to the I/O port and to the serial port of the PC. If necessary, follow the procedure in Section 4.2 to set baud rate to
that of the serial port.
To include file header and/or statistical information, see Section
4.4 to enable header and statistics.
Press
and use
or
to select a file (Fig. 4-3) or
.ALL (Fig. 4-4) to transmit all non-empty files.
to start printing. The DM4 DL displays
Press
to send file(s). When done, press
to return to
(sending file nnn) or
(sending all files). Empty files
and file locations will not be printed.
measurement mode or use
After printing, press
or
to return to measurement mode or use
or
to select another file
to report. Abort and accidental disconnect procedures are
identical to those at the end of Section 4.4.
to select another file to report.
To abort the transmission, press
while readings are being
printed. The DM4 DL displays Abor.
Figure 4-4
DM4E, DM4, DM4 DL Operating Manual
Page 21
4.0 Serial I/O Interface
4.6 Importing Data Into a Spreadsheet
Stored thickness data can be transferred to an IBM compatible
computer and saved on disk in a format that can be imported
into spreadsheet programs, such as LOTUS 1-2-3TM and
Microsoft EXCELTM.
NOTE: Refer to the operating manual of your speadsheet
program for file import instructions.
Follow procedures in Sections 4.5 and 4.2 to connect the DM4
DL to the computer and set baud rate.
To enable statistics see Section 4.4. File header information is
setting.
included regardless of
Press
until SPEC illuminates.
Press
or
to select
, then
to display
the current setting.
Use
or
to select
. Press
to exit.
Select the file or .ALL files and transfer them to the PC by following the procedure at the end of Section 4.5.
4.7 Interrupted Transmission Procedure
If a faulty or disconnected cable, or other problem, causes an
interruption while data is being transmitted to an external device,
the DM4 DL will resume transmission if the connection is restored
within 15 seconds. When the interrupted transmission has been
completed, review the transmitted data carefully to be sure that
no data has been lost or corrupted, or repeat the entire transmission as a precaution.
If the connection is not restored within 15 seconds, DM4 DL will
abort the transmission, briefly display Abor, and return to the currently selected file number.
In this case, the entire transmission must be repeated by
following the procedure in Section 4.4, if printing data, or
Section 4.5
Page 22
DM4E, DM4, DM4 DL Operating Manual
5. Specifications
5.1 Instrument Specifications
Operating Principle:
Ultrasonic, pulse-echo measurement
Probe Zero Adjustment:
Automatic or 2-point calibration
Probe Recognition:
Automatic for DIALOG Intelligent Transducers
V-Path Correction:
Automatic, microprocessor controlled
AUTO Mode Linearity:
±.002 inch (±.05 mm) when calibration point < 1 inch (25 mm); ±.003 inch
(±.075 mm) when calibration point > 1 inch (25 mm)
DA3 Mode Linearity:
±.004 inch (± .1 mm)
Measuring Range:
.020 to 20.00 inch (.5 to 500 mm) depending on probe and material
Dual Multi Measuring Range:
.080 to 1.00 inch (2 to 25 mm) depending on probe, coating and material
Displayed Resolution:
.001 or .01 up to 9.999 inches, .01 above 9.999 inches;
.01 or .1 up to 99.99 mm, .1 above 99.99 mm
Measurement Rate:
4 Hz; 25 Hz in Minimum Capture mode
Material Velocity Range:
.0394 to .3937 in/µs; 1000 to 9999 m/s
Receiver Gain Level:
Three options, selectable via the keypad:
Automatic:
High gain enabled for material velocities up to 246,000 in/s
(6,248 m/s). Low gain enabled for velocities over 246,000
in/s.
Manual Low:
Low gain enabled over the entire velocity range.
Manual High:
High gain enabled over the entire velocity range.
Receiver Bandwidth:
300 KHz to 10 MHz
Reading Stability:
Nominal measured value ±0.001 inch (±0.025 mm) over the operating
temperature range of the instrument
Data Logger Capacity:
5,390 readings maximum; 999 readings if number of files is set to 1 through
5; readings are stored sequentially
Number of Data Files:
1 - up to 999; see Appendix B for number of readings per file based on
number of configured files.
Serial Protocol:
1200, 2400, 4800, or 9600 baud; 8 data bits; 1 stop bit; no parity
Data Transfer:
Via SEND key
Report Languages:
English, German, French, Italian, Spanish, Russian, and Japanese
Memory Retention:
Typically 10 years
Display Type:
Four digit, 0.5 inch (12.7 mm) high, Liquid Crystal Display with
electroluminescent backlight
DM4E, DM4, DM4 DL Operating Manual
Page 23
5.0 Specifications
Power Requirements:
2 each 1.5 volt, AA alkaline cells
Battery Life (Operating Time):
200 hours at 25% duty cycle, without backlight, with steel velocity and .001
inch displayed resolution
Automatic Shut-off:
3 minutes after last probe couple or last press of any key
Operating Temperature
Range:
+10°F to +120°F (-10°C to +50°C)
Storage Temperature Range:
-40°F to +140°F (-40°C to +60°C) without batteries
-40°F to +125°F (-40°C to +50°C) with alkaline batteries
Dimensions (L x W x D):
5.75 “ (146.0 mm) x 3.00” (76.2 mm) x 1.35" (34.3 mm) at thickest part of
case
Weight:
9 ounce (255 grams) with batteries
Probe Connector:
Dual Lemo #00 located on top panel
RS232 Serial I/O Connector:
7 pin, Lemo #0B located on top panel
NOTE: Instrument specifications are subject to change without notice.
5.2 Probe Specifications
Model
Probe Description
Nominal
Frequency
Contact
Diameter
Measurement
Range (Steel)
Temp.
Range
DIALOG Intelligent Transducers
FH2E-D
High Sensitivity Fingertip
8 MHz
.38"
9.6 mm
.030" to 2.0"
.75 to 50 mm
<130°F
<54°C
KBA560-D
General Purpose
5 MHz
.625"
15.9 mm
.060" to 8.0"
1.5 to 200 mm
<250°F
<121°C
DM401/411
GP
5 MHz
.700"
17.8 mm
.060" to 8.0"
1.5 to 200 mm
<300°F
<148°C
NOTE: DIALOG Intelligent Transducers are recognized automatically for optimium performance
STANDARD PROBES:
FH2E
High Sensitivity Fingertip
8 MHz
.38"
9.6 mm
.030" to 2.0"
.75 to 50 mm
<130°F
<54°C
KBA560
General Purpose
5 MHz
.625"
15.9 mm
.060" to 8.0"
1.5 to 200 mm
<450°F
<230°C
HT400
High Temperature
5 MHz
.500"
12.7mm
.030" to 10.0"
.75 to 250 mm
<1000°F.
<538°C
NOTE: HT400 actual measurement range depends upon surface condition and couplant.
HT400 temperature cycling required with surface temperatures above 400°F per Krautkramer
instruction card.
Page 24
DM4E, DM4, DM4 DL Operating Manual
5.0 Specifications
Nominal
Frequency
Contact
Diameter
Measurement
Range (Steel)
Temp.
Range
Model
Probe Description
DP-104
High Penetration
1 MHz
1.25"
31.8 mm
.200" min
5.0 mm min
<130°F
<54°C
DA301
General Purpose
5 MHz
.475"
12.1 mm
.0 6 0" to 8.0"
1.5 to 200 mm
<130°F
<54°C
DA303
High Penetration
2 MHz
.635"
16.2 mm
.200" min
5.0 mm min
<130°F
<54°C
DA312
Thin Materials
10 MHz
.30"
7.6mm
DA312B16 *
Small Footprint
10 MHz
.120”
3 mm
KB550BTH *
Boiler Tube
5 MHz
.375"
9.5 mm
.060" to 2.0"
1.5 to 50 mm
<130°F
<54°C
KB550FH *
Fingertip
5 MHz
.375"
9.5 mm
. 06 0" to 2.0"
1.5 to 50 mm
<130°F
<54°C
FH2E-WR
High Sensitivity Fingertip
Wear Resistant
8 MHz
.550”
14.0 mm
.0 3 0" to 2.0"
.75 to 50 mm
<130°F
<54°C
KBA560-WR
General Purpose
Wear Resistant
5 MHz
.700"
17.8 mm
.0 60" to 8.0"
1.5 to 200 mm
<450°F
<230°C
KBA525
Small Footprint
10 MHz
.200”
5 mm
.025” to 1.0”
.63 to 25.4 mm
<130°F
<54°C
.025" to 1.0"
.6 to 25 mm
<130°F
<54°C
.025 to .5”
.63 to 12.7mm
<130°F
<54°C
NOTE: Probe specifications are subject to change without notice.
5.3 Dual Multi “Through Coating” Mode Probe Specifications
Nominal
Frequency
Through Coating
Measurement Range
Temp.
Range
.625”
15.9mm
.120” to .800”
3 to 20 mm
<250°F
<121°C
.625”
15.9mm
.120” to .800”
3 to 20 mm
<450°F
<230°C
.700”
17.8mm
.120” to .800”
3 to 20mm
<450°F
<230°C
10 MHz
.30 ”
7.6mm
.080” to .50”
2 to 13 mm
<130°F
< 54°C
Model
Description
KBA560-D
Dialog-General Purpose 5 MHz
KBA560
General Purpose
KBA560-WR
General Purpose
Wear Resistant
5 MHz
5 MHz
Contact
Diameter
DA312
Thin Materials
DA301/DA311
General Purpose
5 MHz
.475”
12.1mm
.120” to .800”
3 to 20 mm
<130°F
< 54°C
DM401-GP
General Purpose
5 MHz
.700”
17.8mm
.120” to .800”
3 to 20 mm
<300°F
<150°C
NOTE: The Auto Mode Linearity for the DA301 probe is ± 0.005 inch (± 0.13 mm)
NOTE: Actual “Through Coating” measurement will vary depending upon the
type and thickness of the coating, the thickness of the metal and the quality
of the metal and the quality of the bind between the coating and the metal.
Probe specifications are subject to change without notice.
DM4E, DM4, DM4 DL Operating Manual
Page 25
6. Application
6.1 General Notes
The DM4 is easy to use and will produce reliable, consistent
measurements when used correctly and with an understanding of factors that may affect measurement reliability. This
section explains some of the more common considerations.
6.1.1 Flaws
If, during testing, the DM4 suddenly reads a value which is
much thinner than the apparent thickness of the part, it may
be reading the distance to a flaw in the test piece, rather than
the distance to the backwall. See Section 1.3, How the DM4
Measures Thickness, for more information. If the cause is
unclear, further examination of the part with an ultrasonic flaw
detection instrument or other suitable NDT method is recommended.
Crosstalk Barrier Orientation
6.1.2 Surface Conditions
A regular pattern on the surface under test, such as machine
grooves, may cause a false thickness reading when using a
dual element probe. Higher frequency
probes, such as the DA312, are especially sensitive to this
condition. The problem can usually be corrected by rotating
the probe so that the crosstalk barrier is at a right angle to the
grooves, or using the Dual Multi measurement mode.
It is possible for the surface of a test piece to be too rough to
permit a good reading. Excess couplant could be trapped
between the probe and surface under test, causing a false
reading. A very rough surface may prevent coupling altogether
(no coupling indicator). This problem can be corrected by grinding the surface until it is smooth enough to permit good coupling.
6.1.3 Curved Surfaces
When measuring on curved surfaces, such as tubes or pipes,
be sure to keep the probe centered on the part and as stable
as possible.
As a rule, smaller diameter probes improve coupling and
minimize “rocking” on curved parts. In some cases, special
probes with contoured faces to match surface curvature may
be needed. Practice may be helpful to develop the proper
technique.
When using a flat dual probe, position the crosstalk barrier at
a right angle to the long axis of the part, as shown in the
following figure
6.2 Thickness Measurement on Hot Test Pieces
The instrument can be used to measure the thickness of
materials with surface temperatures of up to 1,000°F (538°C)
with special, high temperature, dual element probe Model
HT400. A special couplant, Krautkramer ZGM, and duty
cycle are also required for high temperature use. The
following procedure is recommended
Calibrate the DM4 according to the appropriate procedure in
Section 2.5 or 2.6.
Thoroughly clean the surface to be tested, using a wire
Knead the ZGM high temperature couplant in the tube before
using. Then place a drop, about the size of a pea, on the
contact face of the probe, not on the test piece.
Carefully couple the probe to the surface under test. To prevent damage to the probe face, do not twist the probe while it is
in contact with the test surface. On a curved surface with a
dual probe, orient the crosstalk barrier as described in Section
6.1.3. Allow 2 or 3 seconds for the ZGM couplant to melt and
provide good coupling. At temperatures above 1020°F (550°C),
the ZGM couplant may ignite spontaneously. This will not
affect thequality of the coupling.
Do not allow the probe to be coupled for more than 5 seconds.
If a thickness reading does not appear within 5 seconds, remove the probe and cool it in air. On curved surfaces, gently
rocking the probe may help achieve good coupling.
While coupled, readings tend to drift upward as the probe
warms. Using MIN (minimum capture) mode (Section 2.9)
may be helpful in minimizing this problem.
Page 26
DM4E, DM4, DM4 DL Operating Manual
6.0 Application Notes
A 100% duty cycle can be employed when taking measurements below 400°F (204°C). No cooling of the probe is required.
If taking thickness readings at temperatures above 400°F, cool
the probe in air as follows:
•
15 seconds for temperatures from 400°F to 550°F
•
30 to 120 seconds for temperatures from 550°F to 1,000°F
Thickness measurements made at high temperatures must be
corrected for the effect of temperature on the material sound
velocity. Velocity in steel changes at an approximate rate of 0.5% per 100°F (-1.0% per 100°C).
Some applications may exceed the instrument’s capabilities.
If high temperature measurements are unsatisfactory after several attempts using this procedure, better results may be
achieved by using a high temperature probe with an ultrasonic
flaw detection instrument.
Before taking another reading, carefully remove the remaining
couplant and residue from the probe.
DM4E, DM4, DM4 DL Operating Manual
Page 27
7. Worldwide Service Centers
Agfa NDT GmbH
Robert-Bosch-Strasse 3
D-50354 Huerth (Efferen)
Cologne, Germany
Phone: (49) 2233-6010
Fax: (49) 2233-601402
E-Mail: hotline@AgfaNDT.de
Krautkramer UK Ltd
Millburn Hill Road
University of Warwick Science Park
Coventry, England CV4 7HS
United Kingdom
Phone: (44) 0845 601 5771
Fax: (44) 0845 130 5775
E-Mail: ndtsales.gb.ng@Agfa.co.uk
Agfa NDT SA
68, Chemin des Ormeaux
F-69760 LIMONEST
France
Phone: (33) 47-217-9220
Fax: (33) 47-847-5698
E-mail: ndt@France.Agfa.com
Page 28
DM4E, DM4, DM4 DL Operating Manual
Appendix A: Displays, Quick Reference
Initial display, DM4E
Section 2.4
2-point calibration Couple to thick standard.
Section 2.6
Initial display, DM4
Section 2.4
Receiver Gain Control
(DM4, DM4 DL)
Section 2.10
Initial display, DM4 DL
Section 2.4
Automatic Gain;
Automatic Backlight
Sections 2.10, 2.15
Fatal memory failure!
Call for service
High Gain; High Band
Pass Filter
(DM4, DM4 DL)
Sections 2.10, 2.13
Memory Failure.
Press MODE key to reset
instrument operating
software.
(All data will be erased)
Medium Gain
(DM4, DM4 DL)
Section 2.10
Enable mode or feature;
Backlight on, Statistics on,
Header on
Low Gain; Low Band Pass
Filter
(DM4, DM4 DL)
Sections 2.10, 2.13
Disable mode or feature;
Backlight off, Statistics off,
Header off
Low limit alarm mode
(DM4, DM4 DL)
Section 2.11
2-point calibration Couple to thin standard
Section 2.6
High limit alarm mode
(DM4, DM4 DL)
Section 2.11
DM4E, DM4, DM4 DL Operating Manual
Page 29
Appendix A: Displays, Quick Reference
Reading exceeds HI Alarm limit
(DM4, DM4 DL)
Section 2.11
File no. nnn active
Section 3.3 (DM4 DL)
Reading less than LO Alarm limit
(DM4, DM4 DL)
Section 2.11
File no. 1 full
Section 3.3 (DM4 DL)
Differential measurement mode
(DM4, DM4 DL)
Section 2.12
Location no. 5 active
SEND confirmed
Section 3.4 (DM4 DL)
Differential reading exceeds
nominal by amount shown.
(DM4, DM4 DL)
Section 2.12
Differential reading less than
nominal amount shown.
(DM4, DM4 DL)
Section 2.12
Page 30
Location no. 5 full
Section 3.5 (DM4 DL
Location no. 5 empty
Section 3.5 (DM4 DL)
Band Pass Filter control
(DM4, DM4 DL)
Section 2.13
Viewing empty location
Section 3.6 (DM4 DL) or unable to
measure in the Dual Multi mode
Section 2.18.
Memory clear
Section 3.2 (DM4 DL)
Viewing “obstructed” location
Sections 3.4.1, 3.6 (DM4 DL)
File no. 1 empty
File no. 1 empty
Section 3.3 (DM4 DL
All files selected
Ready to transmit or clear
Sections 3.3, 3.9, 4.4, 4.5
(DM4 DL)
DM4E, DM4, DM4 DL Operating Manual
Appendix A: Displays, Quick Reference
Clear file no. 1
Section 3.8 (DM4 DL)
Japanese report language
selected
Section 4.3 (DM4 DL
Baud rate selection
Section 4.2 (DM4 DL)
Report selection
Section 4.4 (DM4 DL)
English report language selected
Section 4.3 (DM4 DL)
Header for report
Section 4.4 (DM4 DL)
German report language selected
Section 4.3 (DM4 DL
Statistics for report
Section 4.4 (DM4 DL
French report language
selected Section 4.3 (DM4 DL
Epson FX 850 printer setting
Section 4.4 (DM4 DL)
Italian report language selected
Section 4.3 (DM4 DL
Seiko DPU 411 printer setting
Section 4.4 (DM4 DL)
Spanish report language
selected Section 4.3 (DM4 DL)
24 column / DATAMATE format
printer setting
Section 4.4 (DM4 DL)
Russian report language
selected Section 4.3 (DM4 DL)
Sending ALL files
Transmission in process
Section 4.4, 4.5 (DM4 DL
DM4E, DM4, DM4 DL Operating Manual
Page 31
Appendix A: Displays, Quick Reference
Sending file no. 5
Transmission in process
Section 4.4, 4.5 (DM4 DL)
File SEND aborted
Section 4.4, 4.5 (DM4 DL)
Spreadsheet formatted report
Section 4.6 (DM4 DL)
Non-compatible probe for Dual
Multi measurement mode
Section 2.18
Page 32
DM4E, DM4, DM4 DL Operating Manual
Appendix B: Locations Per File Based on Number of Files
#Of Files
**
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
#Of Loc
Per File
999
999
999
999
999
899
770
673
598
537
488
447
412
383
357
334
314
297
281
266
254
242
231
221
212
204
196
189
182
176
170
165
160
155
150
146
142
138
134
131
128
125
122
119
116
113
111
108
106
104
102
100
98
96
Total
Readings
All Files
999
1998
2997
3996
4995
5394
5390
5384
5382
5370
5368
5364
5356
5362
5355
5344
5338
5346
5339
5320
5334
5324
5313
5304
5300
5304
5292
5292
5278
5280
5270
5280
5280
5270
5250
5256
5254
5244
5226
5240
5248
5250
5246
5236
5220
5198
5217
5184
5194
5200
5202
5200
5194
5184
#Of Files
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81-82
83
84
85-86
87
88
89-90
91
92-93
94-95
96
97-98
99-100
101-102
103-104
105-106
107-108
109-110
111-112
113-115
116-117
118-121
122-123
124-126
127-129
130-132
133-135
#Of Loc
Per File
94
92
91
89
87
86
84
83
82
80
79
78
76
75
74
73
72
71
70
69
68
67
66
65
64
63
62
61
60
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
Total
Readings
All Files
5170
5152
5187
5162
5133
5160
5124
5146
5166
5120
5135
5148
5092
5100
5106
5110
5112
5112
5110
5106
5100
5092
5082
5070
5056
5040
5084
5063
5040
5074
5046
5016
5040
5005
5022
5035
4992
4998
5000
4998
4992
4982
4968
4950
4928
4945
4914
4961
4920
4914
4902
4884
4860
#Of Files
136-138
139-142
143-146
147-150
151-154
155-159
160-164
165-169
170-174
175-180
181-186
187-193
194-200
201-208
209-216
217-225
226-235
236-246
247-258
259-270
271-285
286-301
302-318
319-338
339-361
362-387
388-416
417-451
452-492
493-541
542-602
603-677
678-774
#Of Loc
Per File
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
Total
Readings
All Files
4830
4828
4818
4800
4774
4770
4756
4732
4698
4680
4650
4632
4600
4576
4536
4500
4465
4428
4386
4320
4275
4214
4134
4056
3971
3870
3744
3608
3444
3246
3010
2708
2322
** Maximum number of Readings
DM4E, DM4, DM4 DL Operating Manual
Page 33
Appendix C: Operational Software Reset
WARNING!
Using this procedure completely resets the
instruments to its factory default settings for
all measurement and data logging parameters.
All readings stored in the on-board data logger
will be permanently erased. To prevent loss of
data, transfer all files to a computer or printer.
This procedure resets all instrument parameters to their
original factory default settings.
While the instrument is off, press
and
simul-
taneously and hold both keys for 3 seconds while the instrument powers up.
To verify that a successful reset has occurred, switch to VEL
(velocity) mode and check the displayed velocity value.
The factory default value of .2313 in/µs should be displayed.
If it is not, repeat the procedure.
Page 34
DM4E, DM4, DM4 DL Operating Manual
Index
Page
A
Alarm ............................................................................ 12
Alarm Limits ................................................................. 11
Automatic shut-off .......................................................... 7
B
Backlight ....................................................................... 14
Battery Installation .......................................................... 7
Baud Rate ..................................................................... 20
C
Calibration
Thickness, 1-point .................................................... 9
Thickness, 2-point .................................................. 10
Velocity ................................................................... 11
Clearing Files ................................................................ 19
Clearing Memory .......................................................... 19
Clearing Readings ........................................................ 19
Computer, Sending Data .............................................. 21
Curved Surfaces ............................................................ 26
D
dIF Mode ....................................................................... 13
Disabling Functions ...................................................... 14
Dual Multi Mode Operation ........................................... 15
DA3 Operating Mode .................................................... 16
E
Enabling Functions ....................................................... 14
F
File Header ................................................................... 21
Files
Clearing ................................................................... 19
Number of ................................................................ 17
Printing .................................................................... 21
Selecting ................................................................. 17
Flaws ............................................................................ 26
Functions Disabling/Enabling ....................................... 14
G
Gain .............................................................................. 12
H
Header, File ................................................................... 21
HI Alarm ........................................................................ 13
High Temperature Measurement .................................. 26
Page
Limits, LO/HI ................................................................. 13
LO Alarm ....................................................................... 13
Locations
Selecting .................................................................. 18
Logging Readings ......................................................... 18
Low Battery Indicator ...................................................... 7
M
Measurement
Differential ................................................................. 13
High Temperature ..................................................... 26
Minimum Capture ..................................................... 12
Thickness ................................................................. 12
MIN Mode ..................................................................... 12
N
Number of Files ............................................................ 17
P
Paint, See Dual Multi Mode Operation ........................ 15
Permanent Storage ...................................................... 19
Printer Driver ................................................................. 21
Printing Data ................................................................. 20
R
Readings
Clearing ................................................................... 19
Replacing ................................................................ 19
Reviewing ................................................................ 18
Recording Measurements ..................................... 15, 18
Report Language .......................................................... 20
Resolution ..................................................................... 14
S
Selecting a File ............................................................. 15
Selecting Locations ...................................................... 18
Serial I/O Interface ........................................................ 20
Service ............................................................................ 4
Service Centers ............................................................ 28
Specifications
Instrument ............................................................... 23
Probes ..................................................................... 24
Specifications, Probes ................................................. 24
Spreadsheet, Importing Data ....................................... 22
Statistics, File .............................................................. 21
Surface Conditions ....................................................... 26
T
I
THK Mode ..................................................................... 12
Interface, I/O ................................................................. 20
Interrupted Transmission Procedure ............................ 22
U
K
Keyboard Controls .......................................................... 8
L
Language ...................................................................... 20
DM4E, DM4, DM4 DL Operating Manual
Unit of Measure ............................................................ 14
V
VEL Mode ..................................................................... 14
W
Warranty ......................................................................... 4
Page 35