GE AquaTrans AT868, User Manual

Page: 21 / 158

September 2004
1-12 Installation
Using a Factory-
Configured Serial Interface
Use the following steps to link the AT868 to the control system using
a factory-configured RS485:
1.
Follow the instructions on page 1-4 to prepare the unit before you
connect power.
2.
Feed the wires through the conduit hole and wire lead TMT+ to
pin 2 (RX) on the COMMUNICATION terminal block (refer to
Figure 1-4 on page 1-14 for the terminal block location).
3.
Wire lead TMT- to TX pin 1 (TX) on the COMMUNICATION
terminal block and secure the cable clamp.
4.
Connect the other end of the cable to the control system.
Wiring an External
Totalizer Reset Switch
Your Model AT868 can be wired with an external switch for resetting
the meter’s totalizer values. When properly configured, pressing the
switch will reset the totalizer values to zero for both Channel 1 and
Channel 2 (if present).
IMPORTANT:
The Model AT868 only supplies the capability to
connect and use the switch.The user must supply all
the actual switch and wire to connect it.
Use the steps below to connect an external reset switch:
!WARNING!
Always disconnect the line power from the Model AT868
before removing front cover.
1.
Follow the instructions on page 1-4 to prepare the unit before you
connect power.
2.
Use Figure 1-4 on page 1-14 to properly connect the external
switch to the AT868.
3.
If wiring of the unit has been completed, replace the plastic
shroud, reinstall the front cover on the enclosure and tighten the
screws.
4.
Before you can used the external switch it must be configured as
described on page 2-23.
After the AT868 has been completely installed and wired, reconnect
line power and proceed to Chapter 2,
Programming Site Data , to
program the meter for taking flow rate measurements.