Neptune TRICON E, Руководство по установке и обслуживанию

Страница: 17 / 32

TRICON/E/E2/E3 Transmitter Installation and Maintenance Guide 2-5
Testing the Wires
After wiring the transmitter, double-check to ensure it is wired correctly. Apply
power to the TRICON transmitter and check the output signals as follows:
• At No Flow—there should be no pulses out of the digital output terminal,
and a 4mA direct current should be present in the 4-20mA loop.
• At 1/2 Flow—the pulse rate out of the digital output terminal should be
1/2 the maximum pulse rate, and a 12mA direct current should be present
in the 4-20mA loop.
• At Maximum Flow—the pulse rate out of the digital output terminal
should be equal to the maximum pulse rate, and a 20mA direct current
should be present in the 4-20mA loop.
Final Assembly
Once testing is complete, the transmitter is ready for the final steps of the
assembly process.
1. Shut off all power to the TRICON.
2. Place a generous amount of Dow Corning #4 on all exposed wire and
terminals.
3. Fill the inside of the terminal cover with the moisture compound.
4 Slide the terminal cover in place over the terminal screws.
5. Fasten the terminal cover with the cover screw and tighten until snug.
Take care not to overtighten the cover screw when securing the terminal cover.
6. Snap the strain relief fitting over the cable and push it into place in the
cable entry hole.
7. Wipe away any excess compound.
Mounting the Transmitter
Once the transmitter has been assembled, it is ready to be mounted. If you are
installing a TRICON transmitter on a meter that does not already have a
register mounted on it, skip to step 4. If the meter does have a register
mounted, begin at step 1.
1. Position the small end of the punch on the center of the seal pin at the base
of the register.
2. Using the hammer, drive the punch through the center of the seal pin. The
head of the pin should shear off.
3. Twist the register approximately 1/4 turn counter-clockwise and remove it
from the meter.