Checkline TI-25MX, Operating Manual

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4)  Use the

and

keys to scroll to the known thickness value.

NOTE: 

The longer the keys are pressed and held, the faster the value will increment/

decrement.

NOTE: 

Pressing the

key prior to pressing the 

key will abort the CAL  

routine without 

saving any changes.

5.  Once the known thickness value is being displayed, press the  key to display the  
 

calculated material velocity edit screen.

NOTE:

 The calculated velocity can be edited, if needed, by pressing  

the

and

keys to scroll and edit the velocity value.

6.  Press the 

 key to set the calculated material velocity and return to the    

measurement screen.

CHECK YOUR CALIBRATION! Place the transducer back on the calibration point 
and verify the thickness. If the thickness is not correct, repeat the steps above.

Two Known Thicknesses

The two point calibration should be considered when an application requires improved 
accuracy over a small measurement range based on tolerance requirements. This 
calibration option calculates both the ‘probe zero’ and ‘velocity value. If the two point 
option is used, a probe zero is not required. For example, if the measurement range was 
.080” (2.03mm) to .250” (6.35mm), two known samples or locations on the test material 
would be needed for the minimum and maximum boundaries of the test range. Using the 
range above, a one point calibration would be performed at .250” (6.35mm) and a two 
point calibration at .080” (2.03mm), or something close to the min/max values of the 
measurement range.

NOTE: 

The TI-25MX also offers the capability of setting the ‘probe zero’ to use any 

reference standard as the ‘probe zero’ standard. For clarification, if it’s desired to use a 
one inch reference of a specific material type as the ‘zero’ reference, performing the first 
point of a two-point calibration sets the internal zero of the TI-25MX. This should be 
used only in manual probe zero mode “on block”.

The following steps outline this procedure:

Two Point Calibration

1.  Physically measure a minimum and maximum calibration point of the exact sample  
 

material, or locations directly on the material to be measured, using a set of calipers  

or a digital micrometer.