VEMCO - VR2 Manual
16
5
Maintenance
5.1
Battery Replacement
The VR2 receiver is housed in a black plastic high pressure case with an outer cylinder that is removed from
the receiver, revealing the internal casing protecting the electronics and allowing access to the D-cell Lithium
battery. The metal/PVC internal casing has an O-ring between the metal internal casing and the PVC battery
cup. This O-ring reduces vibration. It is not used for water protection. Do not grease this O-ring.
Replacing a battery in this VR2 requires four steps:
1.
Opening the case (section 5.1.1)
2.
Removing the battery (section 5.1.2)
3.
Inserting the battery (section 5.1.3)
4.
Closing the case (section 5.1.4)
5.1.1
Open the VR2 Case
Two steel rods are necessary to properly open and close the VR2 case. Every shipment of new VR2 receivers
includes a pair of steel rods.
1.
Make sure there is
absolutely no water
on or near the VR2 case. Water, even in a small
quantity, can damage the VR2 internal circuits beyond repair. If the VR2 is attached to
a wet rope, remove the receiver from the rope before opening the case.
This also means that the electronics cannot be exposed to a
sudden change in
temperature and humidity
which may cause condensation to develop on the
electronics.
2.
Place the VR2 on a clean, flat surface so the hydrophone (tapered end) is hanging
over the edge enough that the large hole is past the edge of the surface. DO NOT
let the receiver fall off the surface. TIP: A non-slip surface, such as a rubber mat,
helps keep the VR2 in place while opening it.
3.
Insert one steel rod into the hole that runs through the diameter of the case near
the flat end of the VR2. Position it so most of the rod is on the left side of the
receiver as shown.
4.
Place a hand on the back of the receiver to hold it in place. The back of the
receiver often “jumps” during Step 6 so be prepared.
It is vitally important that the electronics inside the receiver case
do not come in contact
with any water
or the receiver will be damaged. For this reason, VEMCO recommends the
VR2 be opened in a controlled environment and
not
in the field or on the deck of a boat.
The internal casing surrounding the
electronics is not waterproof. Water, even
condensation from a humid environment, will
enter the case and damage the electronics.