ATI
Q46P pH System
Part 4 – Electrical Installation
32
O&M Manual
Rev-F (8/17)
4.7
Junction Box Connection
For installations where the sensor is to be located more than 30 feet from the monitor (max. 3000
feet),
a
junction
box
must
be
used.
The
junction
box
is
shown
in
Figure
25
, and is supplied with Pg 9 gland seals for sensor and interconnect wiring installation.
NOTE:
If sensor is experiencing Low-Slope or Low-Output conditions, due to poor Earth
Ground Connections, move the Shield connection from P/S board to alternate location on
lid, where indicated with an “S”.
Figure 25 - Junction Box Interconnect Wiring
Connecting sensor cable lengths can be up to 400 feet with a
2-wire RTD connection, and up to 3,000 feet with a 3-wire
RTD connection. Contact factory if 3-wire system is needed.
When utilizing the junction box connection, the blue wire on
the connecting sensor cable must be attached to Terminal 6
on the Q46 Transmitter, as above. However, the blue wire on
the Q25 Sensor cable is not used.
Use ONLY ATI 6-conductor Q25 Sensor interconnect cable
between the transmitter and the junction box.
