Teledyne 2103 Operating and maintenance instructions

2103 Secondary Surge Protector
Installation Guide
Overview
Teledyne Isco’s 2103 Modem Module has internal
protection for differential voltages and large current
flows on the tip and ring conductors of a phone line.
However, since the 2103 is powered by batteries, it lacks
a ground reference and does not have protection from
common mode voltages. In certain situations, such as a
lightning strike, large currents could be sent through the
2103 and attached 2150 down to the probe and into the
stream, resulting in damage to the equipment.
Installation of the 2103 Secondary Surge Protector
provides additional protection against a close proximity
lightning strike. It does this by using a low impedance
Ground Equalization Conductor (GEC), which equalizes
the ground potential at the 2150’s probe with that at the
primary earth ground.
Installation
The Surge Protector Kit (P/N 60-5314-493), shown in
Figure 1, contains the following items:
●30 Cable tie fasteners
●2 5/16” #4-40 flat head screws
●2 1/4” #4-40 flat head screws
●1 50 foot Ground Equalization Conductor
●1 Secondary Protector
Figure 1: Secondary Surge Protector Kit
CAUTION
The surge protector kit is not to be installed in an
environment that is classified as a Hazardous Location.
This kit has not been certified to be safe or to make
equipment safe in environments defined as hazardous.
The preferred configuration is shown in Figure 2,
which shows a site where the 2103 is within twelve feet
(cable route) of the primary earth ground.
Figure 2: Preferred Installation Configuration
If the 2103 is more than twelve feet from the primary
ground, an additional earth ground will be needed. This
second grounding point should be as close to the 2103
as possible, but outside of the manhole. When using this
configuration, the secondary protector and the GEC
should be connected to the secondary ground instead of
the primary ground.
Note
To prevent an excessive amount of energy from being
dissipated through the manhole, the primary earth
ground must be of highest quality.
Follow the steps below to install the secondary surge
protector:
1. Remove the 2150 and 2103 from the manhole.
2. Extract the mounting ring with probe from the
sewer. Remove the old cable ties holding the
probe to the mounting ring and remove the
probe from the ring. Clean off the ring, probe,
and cable
3. Mount the GEC to the probe, as shown in Figure
3. Use the longest set of screws in the kit to
securely mount the GEC and probe to the mount-
ing ring, as shown in Figure 4.
Secondary
Protector
Ground Equalization
Conductor and
Connector
Cable Ties
and Screws
Battery
Ground
Equalization
Conductor
Outside Manhole Inside Manhole
2103
2150
Mounting
Ring
Probe
Telephone
Line
Stream
Protector Protector
1st 2nd
Primary Earth
Ground
Instruction Sheet
Revision C, September 18, 2009

Instruction Sheet Revision C, September 18, 2009
Teledyne Isco
P.O. Box 82531, Lincoln, Nebraska, 68501 USA
Toll-free: [phone] • Phone: [phone] • Fax: [phone]
E-mail: [email protected]
Teledyne Isco is continually improving its products and reserves the right to change product
specifications, replacement parts, schematics, and instructions without notice.
Figure 3: Attach the GEC to the Probe
Figure 4: Attach GEC and Probe to Mounting Ring
4. Use cable ties to secure the cables to the edge of
the mounting ring, as shown in Figure 5. Keep in
mind the side of the sewer that will allow for the
cables to stay clear of the flow.
Figure 5: Secure the Cables
5. Use cable ties to tie the lengths of cable together,
using one tie per foot of cable.
6. Reinstall the mounting ring and route the cables
so they are clear of the flowing water. Do not
loop the GEC cable; cut it to length. If there is
excess probe cable such that it is looped to keep
it out of the way, route the GEC cable separately.
7. Disconnect the modem line from the 2103. Con-
nect the secondary protector to the 2103, as
shown in Figure 6. Connect the modem cable to
the end of the secondary protector.
Figure 6: Connect Secondary Protector to 2103
8. Reinstall the 2103 and 2150. Route the secondary
protector conductor wire and the GEC conduc-
tor cable through the manhole casing to the
grounding point.
CAUTION
Do not loop the wires! This can form an inductor
and permanently damage your equipment.
The
cables can be loose with easy bends around corners for
convenient routing, but should be cut as short as
practical.
9. Cut the conductors to the length necessary to
connect to the ground point, leaving enough
length to allow for the equipment to be serviced
outside the manhole. Strip the conductors and
connect them to the ground point, as shown in
Figure 7.
Figure 7: Connect Conductors to the Ground Rod
Last modified December 11, 2012
Ground
Clamp
Ground Rod
Conductor From
Primary Protector
Conductor From
Secondary
Protector
Ground Equalization
Conductor