Instruction Manual
245 Sensor
LIQ-MAN-245
June 2017
1.4
Installation
Before starting installation, determine whether the analyzer/transmitter will be calibrated at
the bench or on-line. If bench calibration is to be performed, wiring instructions can be found
at the end of this section and calibration procedures can be found in Section 1.5.
Installation of the 245 Flow Through Sensor is similar to installation of a section of pipe.
Consequently, be prepared to use tools, supplies, equipment, and techniques similar to
those used to install process pipes. Use common piping practices to minimize torque and
bending loads on process connections. Observe all applicable safety standards. Dimensional
information is shown in Figure 1-2 below.
Note
1.
The sensor should be installed into a straight section of piping at least 4 pipe diameters
in length on either side of the sensor to optimize sensor performance.
2.
The sensor should be installed at an orientation that will keep the sensor filled with
process solution at all times during which measurements are being made. Avoid
downward flowing solutions as such a configuration might leave the sensor partially
empty.
Installing the Sensor in the Process Line
1.
Install Tri-Clamp flanges onto pipes in accordance with applicable instructions, standards,
and local regulations.
2.
Position the sensor between the Tri-Clamp flanges with the flange gaskets inserted
between each set of flanges. Ensure that the locations of the junction box connection and
the RTD are suitable for ease of the remainder of installation, wiring, and use.
Installing the Pt100 RTD
1.
Use of the optional Pt100 RTD is recommended. Use of a customer-supplied Pt100 or
Pt1000 TC mounted in a separate thermowell is also acceptable.
2.
Thread the RTD wires into junction box. Wire the RTD to the j-box terminals as indicated in
Figure 1-4. Use of optional kit PN 24086-00 is recommended.
Extension Cable Hook-Up
1.
Sensor cable should not be run in conduit or open trays with any A.C. power wiring, nor
routed near heavy electrical equipment.
2.
For best sensor/instrument loop performance, using the preprepared extension cable (PN
23909-00) is recommended. (Using a different cable can introduce noise into the signal
and/or reduce loop accuracy.)
3.
One end of extension cable (PN 23909-00) has 8 wires, and the other end has 11 wires.
Refer to Figure 1-4. The end with only 8 wires goes into the junction box. The end with 11
wires goes to the instrument.
Note
If starting with unprepped cable (PN 9200276), remove only as much insulation as is
necessary. The instrument end needs 11 leads: four leads from the green-white-black-
drain bundle, three from each of the two coaxial cable bundles (the inner conductor, the
insulating braid, and the drain wire), and one from the outermost overall braided-copper
shield. For the junction-box end, only 8 leads are used: the white coaxial conductor, its
braided shield, the green coaxial conductor, its braided shield, its drain wire, and the green,
white, and black conductors from the green-white-black-drain bundle. The remaining
shields and drain wires are not used on the J-box end and should be removed -- they should
NOT be connected or allowed to short to any other conductor or the junction box.
4.
Connect the 8 wires of the extension cable to the terminal block inside the sensor’s
junction box as indicated in Figure 1-3 and Figure 1-4.
5.
Connect the 11 wires of the instrument-end of the extension cable according to the
applicable diagram from Figures 1-5 through 1-9, the Wiring Instruction Sheet, or the
instrument’s instructions.
245 Sensor
3
