Checkline TI-45N - Manual (Page 11)

TI-45N Operating Instruction Guide
11
7. Press MODE key. Returns to this Measurement
mode.
6.1 Acoustic Velocity Modes
C = Preset
A = Adjust to any velocity
6.2 How to change Acoustic Velocity
1. Press MODE key 4 times until C followed by 5930 is shown.
2 Press and keys to toggle to preset velocities.
3. Press MODE key 5 times until A then 5930 is shown. This mode will allow
any Acoustic velocity to be set. See section 7.3 for procedure for setting
gauge to a material that is not a preset material or is not listed in the
Acoustic Velocity Chart.
inch
F
5930
➔
6260
➔
10000
➔
4700
➔
1000
➔
1900
➔
2700
➔
4170
➔
4700
➔
5570
➔
5790
5930
➔
5790
➔
5570
➔
4700
➔
4170
➔
2700
➔
1900
➔
1000
➔
4707
➔
10000
➔
6260
➔ ➔
Down Up
TI-45N Operating Instruction Guide
14
6.5 Setup Of Gauge When Acoustic Velocity Is Unknown
In applications where the type of material is not known or the material type
is not listed in the Acoustic Velocity Selection Table the following steps can
be performed to set the gauge to measure accurately.
1. Measure a sample of the material using a micrometer, caliper or similar
measuring device.
2. Turn the power on by pressing the POW key.
3. Place a small amount of couplant fluid on the sample and place the probe
on the sample.
4. After a thickness value is shown on the LCD display along with the Good
Coupling Indicator, remove the probe from the sample.
5. Use the ▲ and ▼ keys to increase or decrease the displayed value until
it equals the known thickness of the sample as measured in Step 1. When
the
▲ key is pressed the “UP” indicator will be show on the LCD display.
The “LOW” indicator will be shown for the ▼ key.
6. The acoustic velocity setting will be automatically adjusted to the correct
value for this material after Step 5 is completed.
7. Change modes to either Mode C or Mode A to display the current acoustic
velocity, as described in section 6.4. Write this value down so it can be
re-entered without having to repeat the above procedures should you need
to change the acoustic velocity to another setting.
6.6 Changing Acoustic Velocity Settings
After determining the required acoustic velocity for the material to be measured,
the acoustic velocity must be adjusted by:
• Selecting one of the ten (10) preset values [Mode C]
• Adjusting the velocity to the desired setting [Mode A, Fine Adjustment]
METHODS FOR CHANGING ACOUSTIC VELOCITY SETTINGS
MODE Select one from Use ▲ or ▼ Last Setting ➔1900 ➔2700 ➔
C a list of 10 keys to index ➔ 4170 ➔ 4700 ➔ 5570 ➔ 5790
Preset Values thru selections ➔ 5930 ➔ 6260 ➔7390 ➔10000
MODE Fine Adjustment Use ▲ or ▼ Any acoustic value can be set
A to desired value keys to increase from 1000 to 12000 m/sec
or decrease value