Unpacking And Inspection; Mechanical Installation - Emerson Rosemount 398R Reference Manual

Installation
February 2019
2.2

Unpacking and Inspection

Inspect the outside of the carton for any damage. If damage is detected, contact the carrier
immediately. Inspect the instrument and hardware. Make sure all items in the packing list are
Note: If the sensor is to be stored, the protective boot should be filled with either KCl electrolyte
solution or pH 4.0 buffer solution and replaced on sensor tip until ready to use.
Note: Save the original packing cartons and materials as most carriers require proof of damage due
to mishandling, etc. Also, if it is necessary to return the instrument to the factory, you must pack
the instrument in the same manner as it was received. Refer to Section 6.0 for instructions.
WARNING
Glass electrode must be wetted at all times (in storage and in line) to maximize sensor life.
2.3

Mechanical Installation

Both models may be installed through a weldalet or in a pipe tee or "Y", as shown in Figure 2-2,
when used with a ball valve. Insert the end of the sensor to a depth sufficient to ensure that the
glass bulb is continuously wetted by the process fluid. Each model can also be inserted directly into
the process without the use of a ball valve for appli cations not requiring continuous operation
during sensor maintenance.
CAUTION
Allow sufficient room for safe retraction and insertion of the sensor. Personnel should have room for stable
footing while performing removal or insertion of the sensor.
The sensor must be mounted within 10-90 degrees of the horizontal with the tip pointed
downward. This ensures that the inside surface of the pH-sensitive glass bulb is completely wetted
and that there is a good electrical connection between the bulb and the internal silver/silver
chloride reference electrode. If the retraction version is to be installed without a ball valve follow
the installation procedure for insertion service (Section 2.3.2). Perform the following steps for
sensor installation through a ball valve:
2.3.1 Installation Through Ball Valve
1.
CAUTION
Buffer solution, in the protective boot, may cause skin or eye irritation.
2.
8
present and in good condition. Notify the factory if any part is missing.
Carefully remove the liquid filled rubber boot which protects the glass electrode and keeps
the liquid junction wet during shipping and storage. Discard the liquid and boot. Make
sure the lubricated O-ring is in place in the groove inside the male connector on the sensor
body.
With the male connector on the sensor's body, insert the sensor into the ball valve until it
gently touches the closed valve. The molded electrode guard will protect the glass bulb
from breakage. (extra caution should be taken when inserting the flat glass sensor into
the valve because it does not have an electrode guard).
Reference Manual
00809-0100-3098
Installation