Section No.
Reference No.
OPERATION & MAINTENANCE SPECIFICATIONS MANUAL
09
07
Section:
Subject:
EQUIPMENT/TOOLS
ULTRASONIC THICKNESS MEASUREMENT
Procedure Issue Date: February 2007
Revision
2
Approved by:
Page 6 of 10
The T-Mike E will display the thickness of the material and the appropriate units of measure (inches or
millimeters).
NOTE: If the detected echo is of marginal magnitude a question mark? Will appear to the left of the echo
indicator. This will alert the operator that the measurement may be subject to error, and steps should be
taken to improve the transducer coupling or position.
If no echo is detected for a period of 4 ½ minutes, the T-Mike E will automatically switch to its
low power or dormant state as indicated by the display becoming blank. In this state probe and
velocity calibration factors are retained in memory. Operations may be resumed immediately by
pressing the power key.
6.
Measurement Units
The T-Mike E can display thickness in either English or Metric units.
The unit system may be selected during the INITIAL SETUP of the T-Mike E as described previously.
7.
Low Battery
The T-Mike E automatically monitors the charge state of the battery to insure that sufficient charge is
available to operate the unit properly.
When the T-Mike E detects minimum allowable battery level the numbers on the display will blink on and
off. This alerts the operator that the batteries should be replaced or recharged before further operation.
When the battery level fails below the minimum allowable level the T-Mike E will turn off and not allow
further operations until batteries are replaced or recharged.
8.
Replacing or Recharging Batteries
The T-Mike E comes standard with 4 AA alkaline batteries. The user may elect to use rechargeable
NiCad AA batteries that can be inserted as a direct replacement of the alkaline cells. The NiCad batteries
may be charged externally or in the T-Mike E as described below.
To change the batteries, loosen the screw on the bottom end cap and remove the spent batteries.
Replace batteries with fresh Alkaline AA cells or recharged NiCad AA cells.
Care must be used to replace the batteries in the correct polarity as indicated on the battery holder.
To recharge the NiCad batteries in the T-Mike E connect the optional battery charger to the combination
DATA/CHARGER jack on the top end cap (item 2 of Figure 2) of the T-Mike E. The NiCad batteries will
be fully charged in approximately 14 hours.
NOTE: After changing batteries be sure to perform the probe zero procedure and recalibrate the T-Mike
E for the material to be measured.
ON
OFF
