How to use the Fluke SB140 Sound Beacon
The SB140 outputs an ultrasound frequency, making it easy to spot leaks with an acoustic imager in areas where it is not possible to pressurize.
The 40kHz frequency is designed to travel long distances through air with minimal signal attenuation. This ensures that sound escapes through openings and reaches the acoustic imager.
HOW TO USE
1) Turn on the sound beacon with the switch on the top. A green LED will light up.
2) Place the beacon inside the enclosure you wish to test. Sound will escape from anywhere unsealed in the compartment.
3) Using a Fluke acoustic imager, dial in the frequency to 40kHz, or set a compatible meter to "Beacon Mode". You should clearly see where sound is escaping the enclosure.
ACCESSORY PROBE
An Accessory Probe is included with the SB140. This is meant to only be used when it is not possible to place the SB140 inside a compartment. It is used to “inject” sound into the area under test.
HOW TO REPLACE BATTERIES
1) To open the battery door, rotate the knob counterclockwise. The door will easily pop off.
2) A sticker inside the beacon indicates the correct polarity for a 9V battery.
(If this sticker is missing or illegible, the correct polarity is as follows: with the power switch upright, and the label on the left, the battery is inserted with the positive contact on the right and the negative on the left.)
3) To reattach the door, place it firmly onto the back of the beacon. The battery will push back against the door, so you must apply pressure to hold down the door in place as you rotate the knob clockwise until it is tightened.
A small hole is in the knob to allow a small tool to be inserted and get a better grip.
BEACON MODE
Beginning with Firmware 6.1, the ii500, ii905, and ii915 will be upgraded to have a ‘Beacon Mode’, where the camera frequency filter is fixed and centered on 40 kHz.
By default, the frequency range is already positioned to best capture on the 40kHz frequency made by the beacon. However, the user may still select frequencies in the 30kHz to 50 kHz range in this mode.
SPECIFICATIONS