Technical Manual

32 D C U M a i n t e n a n c e a n d O p e r a t i o n M a n u a l
Inspecting the Site
of supporting 4,000 pounds or more will suffice. The chain may be secured with
removable links. It must be attached to a structural building member (such as an
I-beam) capable of supporting several thousand pounds.
Inspect the Lock
If the DCU is within 8' of the ground, or in a public area, it must be locked
according to OSHA standards. Upon arrival ensure that locks and/or tamper
evident seals are in place. If they are not, make note of it, and consider escalating
the matter to the DCU owner.
Inspect the Battery
With the DCU unpowered, it will continue to operate while drawing power from
the battery.
Consider the voltage charge history maintained in AclaraONE. If the head end
indicates that the DCU battery has reached its end of life because it fails to hold its
charge, it must be replaced.
If the battery is leaking it must be replaced.
If the battery is to be replaced, refer to the Battery section of the DCU Installation
Instructions, Y20977-TUM.
If the battery is to be kept, clear any corrosion found on the battery, and ensure the
bolts are properly tightened.
Inspect the Earth Ground Resistance
It is important that sufficient earth grounding be provided in order to protect any
building under the assembly from lightning.
• Verify that all bonds are secure.
• Use a ground resistance meter to verify that the resistance to ground is 10
Ohms or less.
Colocation Assurance
New construction may result in new antennas installed near the DCU antenna. A
new antenna installed near the DCU antenna may create interference. If so, a
signal analyzer may be used to test the power received by the antenna from the
other system.
A signal analyzer with an antenna may be positioned near the antennae and the
power in the (licensed) receiving bands measured to determine the level of in-band
interference.