Section 3. TLX106 Instrumentation Installation

3.3.1.2 External Installation

The following modem kit components are used to make the external connections:

(1) Direct Burial Splice Kit

(1) 20 foot Telephone Patch Cord with Connector

1)Connect the 20 foot patch cord to the connector marked "comm" on the external back panel, under the protective cover.

2)Splice the labeled "Tip" and "Ring" lines of the patch cord to the telephone service line. Use the direct burial splice kit when splices are in a valve box or buried.

3.3.2Short-Haul Modem

Short-haul modems enable communication between a datalogger and computer over two twisted pairs of wires. The maximum distance between modems is determined by baud rate and wire gauge. At 9600 baud, the approximate range is 4.0 miles. DCE / DTE switches on the modems are set to DCE.

5 5 1 E

N

S

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2 3 C S

FIGURE 3.3-2. Short-Haul Modem Mounting and Connection

3.3.2.1 Internal Installation

For installation inside the TLX106 Enclosure, the following components are provided in the short-haul modem kit:

(1)SC932C Interface

(1)Rad Modem

(1)Rad/SC932C Mounting Bracket

(4)Screws

(1)12 inch 4-wire patch cable

Install the short-haul modems as shown in Figure 3.3-2 and 3.3-3.

1.Mount the Rad / SC932C mounting bracket into the TLX106 Enclosure with the 3 pre-threaded screws provided.

2.Connect the Rad Modem and SC932C. Strap them into the mounting bracket under the Velcro strap.

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