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5.5.1 In-Line Electrode Installation
Note: Avoid electrode
damage and erroneous
measurements by closely
adhering to the maximum
pressure and temperature
specifications, see
SPECIFICATIONS on
page 9.
5.5.2 Submersible Sensor Installation
5.5.3 Flow-Thru Cell Installation
A 1-½" NPT fitting is required in line, which must be filled with the sample stream (see
Figure 15 on page 61). Orienting the electrode between 45 to 70° from the vertical helps
prevent air bubbles from interrupting the signal. Install the mounting collar into the 1-½"
fitting using Teflon tape or thread compound on the male threads. Place the compression
nut over the top of the electrode.
Do not use pipe compound or Teflon tape on the compression nut. Slip the o-ring over the
bottom of the electrode. Connect the reference tubing to the top of the electrode, with a
compression nut and ferrule (see Figure 25 on page 85, Detail A). Connect the cable to the
electrode through the quick disconnect coupling on the top of the electrode.
The electrode is now ready for installation into the mounting collar, but must be purged
and calibrated before operation (see SECTION 6 BASIC START-UP). When installing the
compression nut into the mounting collar, hand-tighten only.
For optimal performance, orient the reference outlet of the electrode downstream from the
glass sensor with respect to flow direction. The electrode check valve and stem are located
directly over the reference outlet.
Submersible sensors are typically installed on the end of a 1-½" ID pipe having a 1-½"
NPT fitting (see Figure 15 on page 61). Install the mounting collar into the 1-½" NPT
fitting using Teflon tape or pipe compound on the male threads. Run the electrode cable
and reference tubing through the mounting collar and pipe. Slide the o-ring over the top of
the electrode against the flange. Connect the reference tubing to the top of the electrode
with a compression nut and ferrule (see Figure 25 on page 85, Detail A). Connect the cable
to the electrode through the quick disconnect coupling on the top of the electrode. Place
the compression nut over the electrode and hand tighten into the mounting collar. (Do not
use Teflon tape or pipe compound on the compression nut). The electrode must be purged
and calibrated before operation (see SECTION 6 BASIC START-UP).
The flow-thru cell is mounted to the wall using screws or bolts (not provided) through the
two ¼-inch mounting holes (see Figure 16 on page 61). The inlet, located on the bottom of
the cell, is suitable for ¼-inch flexible tubing.
The inlet fitting can be removed and replaced with a ¼-inch NPT fitting suitable for rigid
tubing. The outlet, located on the side of the cell, is suitable for ½-inch flexible tubing.
The outlet fitting can be removed and replaced with a ½-inch NPT fitting suitable for rigid
tubing. The electrode is inserted from the top of the cell. The electrode must be wired,
purged, and calibrated before operation (see SECTION 6 BASIC START-UP).
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