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ELECTROMATIC TI-25M-MMX Manual Download Page 13

– 13 –

4. Press the CAL key once more to exit the calibration mode. The TI-25M-MMX 

is now ready to perform measurements.

NOTE:

At any time during the calibration procedure (IN, MM, IN/ms, or M/s

flashing in the display), pressing the PRB-0 key will restore the gauge to the 
factory default sound-velocity for steel (0.233 IN/ms).

To achieve the most accurate measurements possible, it is generally advisable to
always calibrate the TI-25M-MMX to a sample piece of known thickness.
Material composition (and thus, its sound-velocity) sometimes varies from lot to
lot and from manufacturer to manufacturer. Calibration to a sample of known
thickness will ensure that the gauge is set as closely as possible to the sound
velocity of the material to be measured.

Two Point Calibration

NOTE: This procedure requires that the operator has two known thickness points
on the test piece that are representative of the range to be measured.

1. Make sure the TI-25M-MMX is on and switched to P-E (pulse-echo) mode. 

Press the Dual-Multi key to toggle modes.

Note

: The calibration function has been disabled in E-E (echo-echo) mode. If 

the CAL key is pressed while in E-E mode, “nO” followed by “CAL” will be 
displayed.

2. Perform a Probe-Zero (refer to page 10)

3. Apply couplant to the sample piece.

4. Press the transducer against the sample piece, at the first/second calibration 

point, making sure that the transducer sits flat against the surface of the 
sample. The display should show some (probably incorrect) thickness value, 
and the Stability Indicator should have nearly all its bars on.

5. Having achieved a stable reading, remove the transducer. If the displayed 

thickness changes from the value shown while the transducer was coupled, 
repeat step 4.

6. Press the CAL key. The IN (or MM) symbol should begin flashing.

7. Use the UP and DOWN arrow keys to adjust the displayed thickness up or 

down, until it matches the thickness of the sample piece.

8. Press the Probe key. The display will flash 1OF2. Repeat steps 3 through 8 on 

the second calibration point. The TI-25M-MMX will now display the sound 
velocity value it has calculated based on the thickness values that were entered 
in step 7.

9. The TI-25M-MMX is now ready to perform measurements within this range.

– 16–

7 .0  A

LARM

M

ODE

The Alarm Mode feature of the TI-25M-MMX allows the user to set an audible
and visual parameter when taking measurements. When the Alarm Mode is on,
the green LED is illuminated. If a measurement falls below a nominal value, set
by the user, the red LED will illuminate and the beeper will sound, if enabled.
This improves the speed and efficiency of the inspection process by eliminating
constant viewing of the actual reading displayed. The following pages outline
how to enable and set up this feature:

Using the Beeper

1. While the unit is off, press and hold down the ALRM key.

2. Press ON/OFF key to power up the unit.

3. Release the ALRM key -BEEP ON or BEEP OFF will be displayed enabling or 

disabling the beeper.

4. Repeat steps 1 through 3 to toggle between BEEP ON or BEEP OFF.

Alarm Mode

1. Press ON/OFF key to power up the TI-25M-MMX.

2. Press the ALRM key. ALAr OFF, or ALAr followed by a thickness value and 

flashing IN (or MM) symbol will be displayed -indicating the alarm mode is 
enabled.

3.  Repeat step 2 to toggle between ALAr OFF or ALAr value and

flashing IN / MM symbol (On).

4. Assuming ALAr value flashing IN is displayed, use the UP and DOWN 

arrow keys to scroll to the desired nominal alarm value. 

5. Press the ALRM key once again to select the nominal value entered.

6. The TI-25M-MMX is now ready to perform measurements using the 

Alarm feature.

Summary of Contents for TI-25M-MMX

Page 1: ...LECTROMATIC All returns for warranty or non warranty repairs and or replacement must be authorized by ELECTROMATIC in advance with all repacking and shipping expenses to the address below to be borne by the purchaser THE FOREGOING WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES EXPRESSED OR IMPLIED INCLUDING BUT NOT LIMITED TO THE WARRANTY OF MERCHANTABILITY AND FITNESS FOR ANY PARTICULAR PURPOSE OR A...

Page 2: ...iece of known thickness Ideally this sample material should be a part of the same piece being measured or at least from the same lam ination batch By calibrating to each test piece individually the effects of varia tion of sound velocity will be minimized An additional important consideration when measuring laminates is that any included air gaps or pockets will cause an early reflection of the ul...

Page 3: ...ecreases In most applications with surface temperatures less than about 200 F 100 C no special procedures must be observed At temperatures above this point the change in sound velocity of the material being measured starts to have a noticeable effect upon ultrasonic measurement At such elevated temperatures it is recommended that the user perform a calibration procedure refer to page 11 on a sampl...

Page 4: ...reezing Point 20 F Vapor Pressure N A Evaporation Rate N A Specific Gravity 1 0Z Solubility in Water complete pH 7 35 7 9 Acoustic Imp 1 726x106 Vapor Density N A Appearance and Odor water white opaque gel bland odor Section 4 Fire and Explosive Hazard Data Flash Point none Upper Exposure Limit none Lower Exposure Limit none Special Fire Fighting Procedures N A Extinguishing media N A Unusual Fire...

Page 5: ...M or a velocity value IN ms or M s The UP arrow key has two functions When the TI 25M MMX is in calibration mode this key is used to increase numeric values on the display An auto repeat function is built in so that when the key is held down numeric values will increment at an increasing rate When the TI 25M MMX is not in calibration mode the UP arrow key switches the SCAN measurement mode on and ...

Page 6: ...lay numeric values as well as occasional simple words to indicate the status of various settings When the TI 25M MMX is displaying thickness measure ments the display will hold the last value measured until a new measure ment is made Additionally when the battery voltage is low the entire dis play will begin to flash When this occurs the batteries should be replaced These eight vertical bars form ...

Page 7: ...ng the probe supplied with the TI 25M MMX the user should perform a Probe Zero as described in Section 4 2 The Probe Zero Test Plate is used for this task It is located on the top edge of the gauge as shown in the photo below It also serves as the battery compartment cover Note The thickness of this plate is not important and it should not be used as a Calibration Test Plate A precision 4 step Tes...

Page 8: ...the factory calibrated for steel with an acoustic velocity of 0 2330 IN µs 5920 M s To measure the thickness of any other material the calibration will have to be changed by adjusting the acoustic velocity to the appropriate value for the specific material being measured To determine the proper acoustic velocity for the non steel material refer to the Acoustic Velocity Table section 10 1 After det...

Page 9: ... this happens the TI 25M MMX may perform a measurement through this couplant film resulting in a measurement that is larger or smaller than it should be This phenomenon is obvious when one thickness value is observed while the transducer is in place and another value is observed after the transducer is removed In addition measurements through very thick paint or coatings may result in the paint or...

Page 10: ...lse echo mode by pressing the Dual Multi key to toggle the modes Note The Probe Zero feature is not used in Echo Echo Thru Paint mode and has been disabled If the PRB 0 key is pressed while in this mode nO followed by Prb0 will be displayed 19 10 0 TRANSDUCER SELECTION The TI 25M MMX is inherently capable of performing measurements on a wide range of materials from various metals to glass and plas...

Page 11: ...tting the sound velocity described in the following pages Note Although the TI 25M MMX has a thru paint coating feature one and two point calibrations must be performed on material with the paint or coating removed Failure to remove the paint or coating prior to calibration will result in a multi material velocity calculation that may be different from the actual material velocity intended to be m...

Page 12: ...M symbol is flashing press the CAL key again so that the IN ms or M s symbols are flashing 3 Use the UP and DOWN arrow keys to adjust the displayed velocity up or down until it matches the sound velocity of the material to be measured 17 8 0 DUAL MULTI MODE Often times users and inspectors in the field are faced with coated materials such as pipes and tanks Typically inspectors will need to remove...

Page 13: ...upled repeat step 4 6 Press the CAL key The IN or MM symbol should begin flashing 7 Use the UP and DOWN arrow keys to adjust the displayed thickness up or down until it matches the thickness of the sample piece 8 Press the Probe key The display will flash 1OF2 Repeat steps 3 through 8 on the second calibration point The TI 25M MMX will now display the sound velocity value it has calculated based o...

Page 14: ...emoved from the sample after a measurement the last reading will be retained on the display b Occasionally a small film of couplant will be drawn out between the probe and the surface as the probe is removed When this happens the TI 25M MMX may perform a measurement that is larger or smaller than it should be This phenomenon is obvious when one thickness value is observed while the probe is in con...

Page 15: ...ng Instructions CHECK LINE BY ELECTROMATIC Includes special version Model TI 25M MMX EXT MMX310 Distributed by ABQ Industrial LP USA Tel 1 281 516 9292 888 275 5772 eFax 1 866 234 0451 Web https www abqindustrial net E mail info abqindustrial net ...

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