Checkline TI-25LT - Manual (Page 7)

3.7 Probe Connector Receptacle
Located on the top edge of the TI-25LT housing are the receptacles for the
probe and the probe zero plate.
The connectors for the probe
are non-polarized so the con-
nector at the end of the probe
cable can be inserted into
this receptacle in either
orientation. Make sure the
connector is “well seated” in
the receptacle.
3.8 Battery Compartment (Changing The Battery)
The battery compartment is
located under the probe zero
test plate. To open the battery
compartment, unscrew the
probe zero plate by rotating it
counterclockwise. The TI-25LT
operates on two (2) AA
Batteries (1.5 V). If desired,
rechargeable batteries may be
used.
The TI-25LT is shipped with the batteries installed. Insert batteries in the
polarity indicated on the rear label.
Note: When the display elements begin to flash off and on repeatedly, the
batteries are low and should be replaced.
Battery Cover
Probe Receptacles
Probe Zero
Plate
– 7 – – 10 –
5 .0 QU I CK START I N ST RU CT I ON S — ST EEL T H I CK N ESS
1. Turn on the power by pressing the ON/OFF key.
2. Plug the probe cable into the receptacle at the top of the gauge.
3. Place a drop of coupling fluid on the built-in Probe Zero Plate.
4. Grasp the probe and place it on top of the Probe Zero Plate.
Apply moderate pressure to the top surface of the probe with
your index finger or thumb to stabilize the probe and to keep
the wearface seated flat against the measurement surface.
5. The display will show some thickness value and the Stability Indicator
will have most of its bars illuminated.
6. While keeping the probe on the Probe Zero Plate, press the PROBE ZERO
key. The display will show a value that can be recorded for future use.
7. Remove the probe from the Probe Zero Plate. The gauge is now ready to
perform thickness readings on steel samples.
8. Place a small amount of coupling fluid on the steel surface to be
measured and proceed as explained in step #4 above.
9. The gauge will display the thickness of the steel wall along with the
Stability Indicator showing the relative stability of the reading. If fewer
than five (5) bars are illuminated, the thickness reading displayed is most
likely inaccurate.
Notes
a. When the probe is removed 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-25LT 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 contact with the material, and another
value after the probe is removed.
c. The gauge will automatically power off after 5 minutes of non-use.