VEMCO – VR100 Manual 28 May 2018 1
1 Introduction
1.1 System Overview
The VR100 is a general-purpose, ultrasonic, splash-resistant receiver designed for manual tracking of aquatic
animals from small boats or for recording laboratory data. Its hardware architecture has been developed to
support a wide range of applications and transmitter types.
The VR100-200 receiver now has the ability to communicate through a transponding hydrophone to a
transponding receiver, such as a VR2AR, a VR2Tx, or an HR2. This two-way communication allows
information to be passed to the receiver, such as sending a release command to a VR2AR allowing it to
separate from its mooring, and information to be received from the receiver, such as the number of detections
stored in memory. Receivers also report the slant (or absolute) distance between the receiver and the
transponding hydrophone connected to the VR100. The VR2AR, with its depth sensor, can also report its
depth and the horizontal distance between it and the transponding hydrophone.
All the VR100 receiver’s Digital Processing and Controller Functionality is software based and can be
updated in the field from a laptop. This allows new features, such as specialized tag detection algorithms and
support for new tag types, to be added during the life of the product and without the product having to return
to the factory.
The VR100 receiver can detect continuous
and coded tags on eight separate
frequencies and at the same time. It can
also store the detections, along with the
date/time and GPS location of the receiver
at the time of the detection, to be loaded to
a computer for viewing or analysis.
Communication between the computer
software and the VR100 receiver occurs via
the supplied USB cable.
The internal gel-cell rechargeable battery
can operate for approximately 12 hours
under normal operating conditions with the
backlight off. Operating time with the
backlight on or performing acoustic
communication will shorten the battery
time. The VR100 receiver can also be
operated while the battery is being charged
from the supplied AC adapter or an external
DC source, allowing the receiver to
continue to operate during the charging
process. However, for the best noise
performance, the VR100 receiver should be disconnected from the PC and charger as these devices can
sometimes add unwanted noise to the receiver.
34 cm x 32 cm (with handle extended) x 15 cm
VR100-100: 5.2 kg
VR100-200: 6.5 kg
Approximately 12 hours when operating
between 10°C and 40 °C with backlight off; less
with backlight on or when transponding.
100-240V; 50/60Hz; 0.80A max
(details in Specifications – section 9.3)
-5°C to +40 °C;
Battery life is reduced below 0°C.
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