Superior Signal Company LLC
AccuTrak
®
VPX-WR
User’s Manual
© 2015
2
QUICK GETTING STARTED
To use the VPX-WR, put the headset on, with the cloth band over your head and the metal
behind. The cloth band is adjustable, adjust the Velcro to fit your head properly. Align the
red dots between the headset connector and the connector in the back of the instrument,
and push them together. To remove the connector pull on the knurled sleeve on the
connector. The same connector is used to charge the instrument and to output the Het.
signal, when the charger or the output cable is plugged in to it.
CAUTION !
Be VERY careful while wearing the headset around machinery. The headset is also a
hearing protector attenuating the background noise which can make you think there is no
machine motion. Additionally keep track of the cable between the VPX-WR and the
headset so that it does not get caught in machinery parts.
Turn the knob, slowly clockwise until it stops. The ON light will illuminate to show that the
instrument is ON. At this setting the instrument is set now to maximum sensitivity & low
level noise rejection, and it is ready to search for a leak. Point the front towards a
suspected area and listen for any sound that resembles a leak. This sound will be like a
hiss or a whistle in the beginning, and will turn into a soft clicking sound as the DND
begins to capture the signal. Once the signal has been captured the dominant frequency
will be heard in the headset.
Leaks normally sound like a harsh hissing noise, which ascends in pitch as you approach
the source. When you reach that point this sound will change into a tone or a number of
different tones. It may be beneficial to you to test the sounds the VPX-WR produces using
an air gun or an aerosol can like a lubricant or a deodorizing spray and just listen to it.
CAUTION:
If you are going to use an air gun to generate the sound, turn the sensitivity knob to 5% of its
range of travel. Do not point the air stream directly in the instrument as you could damage it.
Dropping pins on a table or spring-like metal pieces will familiarize you with how
mechanical ultrasounds sound through the VPX-WR.
When you use the VPX-WR in a tight space and you need to find leaks in hoses and tubing
in manifolds, attach the horn restrictor to the horn of the VPX-WR and search for the leaks.
The VPX-WR will take you to the exact point. If the suspected point is difficult to reach,
use the plastic waveguide. You can make your own waveguides to fit particular needs you
may have. See instructions at the section about waveguides.
When the ON light starts flashing, you will need to charge the instrument within an hour. If
the battery charge is not sufficient, the instrument will shut down. However since
batteries recover it may come back only to shut down again. At this point you must charge
it. We recommend that you leave the instrument plugged in the charger in between uses
when you use it daily.
