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Manual Mode (BG80DL and BG80TDL):
In manual mode, you enter the current temperature into the
gauge before carrying out measurements. This is useful to those users that do not require temperature
compensation, or those who have an external temperature device measuring the temperature.
Semi Automatic Mode (BG80TDL with temperature sensor only):
In semi automatic mode you have an
opportunity to initiate when the temperature is read and automatically adjusted. This mode may be useful
to those users that want to use the automatic mode but want to retain some control as to when the
temperature is changed, rather than take for granted the temperature is automatically changing. Some
companies and application procedures may call for manually initiating and physically viewing the change in
temperature by adding a manual step to the procedures. The semi automatic mode is designed for
requirements such as these.
Automatic Mode (BG80TDL with temperature sensor only):
The automatic mode constantly monitors
and compensates for temperature when the accessory temperature sensor is attached to the gauge and
placed on the joint or fastener being measured. While this mode eliminates the need to manually insert or
initiate a temperature measurement, it also requires that the user be very cautious that the sensor is
properly attached to the joint or fastener, and not accidentally removed or misplaced during the
measurement process.
9.2 TEMPERATURE COMPENSATION - MANUAL MODE
1.
Select MENU/UTIL/TEMP MODE and use LEFT and RIGHT to adjust it to MANUAL
2.
Press MEAS to return to the measurement screen
3.
In the hot menu highlight the TEMP field and adjust to the measured temperature using LEFT and
RIGHT or alternatively press ENTER to open the Digits Edit Box
4.
Press OK to confirm or ESC to cancel.
9.3 TEMPERATURE COMPENSATION - SEMI AUTOMATIC MODE
1.
Select MENU/UTIL/TEMP MODE and use LEFT and RIGHT to scroll the TEMP MODE to SEMI
2.
Press MEAS to return to the measurement screen
3.
In the hot menu highlight the temperature field, press ENTER and the Digits Edit Box will display the
live temperature. Press OK to accept the value or ESC to cancel.
9.4 TEMPERATURE COMPENSATION - AUTOMATIC MODE
1.
Select MENU/UTIL/TEMP MODE
2.
Use LEFT and RIGHT to scroll TEMP MODE to AUTO
3.
Press MEAS to return to the measurement screen.
10 BOLT MATERIAL CALIBRATION
10.1 WHY DO WE NEED TO CALIBRATE
The preset bolt types in the gauge contain average factors for the material type. These are approximate
values only. In a tightly controlled application where extreme accuracy is required, it is necessary to obtain
all the information possible about the fasteners being measured. By calibrating the fasteners, the ultrasonic
and physical lengths of the bolts will match. However, if a field calibration is done, a complete calibration is
not necessary. An important thing to note is the fact that everything done in the calibration process results
in average values. Since a sample of fasteners will be used in the calibration process, and given the slight
differences in material, the result will always be an average value of that sample.
10.2 VELOCITY CALIBRATION
A velocity calibration is generally performed by adjusting the velocity in the gauge to the point where the
ultrasonic and physical lengths match. Again, since a sample of fasteners will be used in this process, the
velocities will vary by a very small amount, thus resulting in an average velocity value. To accurately
calibrate the velocity, a calibrated set of mechanical calipers is required to determine the exact physical
lengths of the fasteners. The following procedure outlines this process.
