FTS Bubbler - Connectors and Wiring

700-Bubbler-Man Rev 12 13 Feb 2020
Page 7/51
• The bottom of the Bubbler should be free of obstruction so that the orifice line has a free
downward run.
• Ensure the orifice line is not bent or crimped.
• Do not mount the Bubbler so that it rests on a horizontal surface such as a tabletop or shelf
as this can bend the orifice line permitting moisture to accumulate and preventing the
correct operation of the device.
2.4 CONNECTORS AND WIRING
When installing the Bubbler connections, do not apply power until all other connections are made.
The following connections should be made:
1. Data connections (SDI-12)
2. Desiccant assembly
3. Orifice line
4. Power
.
Figure 2-1: Bubbler Connections
2.4.1 DATA LOGGER CONNECTIONS
The Bubbler’s interface allows for SDI-12 or 4-20mA connections to a data collection platform (DCP)
in accordance with the DCP’s capabilities. These connections are made using the removable data
terminal block on the bottom of the Bubbler.
Connect the leads to the data logger in accordance with the manufacturer’s directions. Connect the
flying leads from the data logger to the Bubbler’s data terminal strip as shown.
Insert the terminal block into the Bubbler’s connector port and secure.
Figure 2-2: SDI-12 Connections
SDI-12 Connections
4-20mA Connections
Pin
Description
Pin
Description
1
12 VDC
3
Ground
2
Serial data
4
4-20mA positive
3
Ground
5
4-20mA negative
6
Chassis ground
6
Chassis ground
1
2
3
4
5
6
PINS
Barbed hose fitting
for desiccant hose
Bubbler outlet
(orifice line
connection)
Bubbler air
intake fitting
Data
Power