VEMCO - VR2C Manual
9
Jul 2018
2
1.2
VR2C Case
The VR2C is housed in a black plastic high pressure case. The various external parts of the receiver are
identified and briefly explained in the next section (1.3).
A crucial part of the VR2C is the hydrophone, located at one
end of the receiver. The hydrophone is similar to a
microphone – it “listens” for sounds and transfers them to the
electronics inside the receiver. Be very careful not to bump
the hydrophone against hard surfaces or damage may occur
that could compromise the receiver’s ability to detect tags.
The VR2C only listens to the frequency selected at the time of ordering: the VR2C-69kHz operates at 69
kHz and the VR2C-180kHz operates at 180 kHz. The receiver frequency chosen depends on the type of
coded tags that will be used. For example, if tags operating at 69 kHz are being used then the VR2C-69kHz
must be used.
The only externally distinguishable physical differences between the VR2C-69kHz and the VR2C-180kHz
are the size of the hydrophone and the colour of the text on the serial number band. The VR2C-180kHz
hydrophone is smaller than the VR2C-69kHz hydrophone, as shown in the photos below. The case
dimensions are found in section 4.3.
The two versions of the VR2C operate in the same manner so they’ll be discussed simply as a “VR2C” in
this manual.
The VR2C can be powered externally from a DC power source and/or
internally by a single “D” size 3.6 Volt Lithium battery (see section 5.2). The
VR2C is shipped in Suspend mode, with the internal battery connected, so the
case does not need to be opened until the battery must be replaced.
Do not bump the
hydrophone
or the receiver
may be damaged and unable
to detect transmitters.
VR2C-69kHz VR2C-180kHz
Visible External Differences:
1. Hydrophones are different sizes
2. Serial Number label is a different colour.
Blue = 69 kHz
Green = 180 kHz
Case does not need to
be opened until battery
must be replaced.
WARNING
The VR2C pressure case and seal have a static depth rating of
500 meters
(730 psi).
Physical shocks to the receiver, such as bumping into a solid object, at any depth can result in a
considerably higher pressure on the casing than just the depth pressure, and water may enter the VR2C
case. As well, if the O-ring seals have been compromised, water may also enter the receiver case. If you
are suspicious that water has entered the receiver, then follow the suggestions found in section 6.2.