Honeywell SmartLine, User Manual

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7. Maintenance/Repair
7.1. Introduction
66 SmartLine Wireless User's Manual Revision 2
7. Maintenance/Repair
7.1 Introduction
This section provides information about preventive maintenance routines and replacing damaged
parts. The topics covered in this section are:

Preventive maintenance of the meter body barrier diaphragms and process piping to the
transmitter.

Replacement of damaged parts such as the transmitter display/sensor and batteries.
7.2 Preventive maintenance
The SmartLine Wireless Transmitter itself does not require any specific maintenance routine at
regularly scheduled intervals. However, you should consider carrying out these typical inspection
and maintenance routines on a schedule that is dictated by the characteristics of the process
medium being measured and whether blow-down facilities or purge systems are being used.

Check piping for leaks.

Clear the piping of sediment or other foreign matter.

Clean the transmitter’s pressure chambers including the barrier diaphragms.
7.3 Inspecting and cleaning barrier diaphragms
Depending on the characteristics of the process medium being measured, sediment or other
foreign particles may collect in the process head cavity/chamber and cause faulty measurement.
In addition, the barrier diaphragm or diaphragms in the transmitter’s meter body may become
coated with a residue from the process medium. The latter is also true for external diaphragms on
flange mount and remote seal type transmitters.
In most cases, you can readily remove the process head or heads from the transmitter’s meter
body to clean the process head cavity and inspect the barrier diaphragm or diaphragms. For
flange mount and remote seal diaphragms, you may only need to run a purge line in the tank to
rinse off the face of the diaphragm.
The procedure in Table 7-1 outlines the general steps for inspecting and cleaning barrier
diaphragms. You may have to modify the steps to meet your particular process or transmitter
model requirements.
Figure 7-1 shows an exploded view of a DP transmitter’s meter body for
reference.
Tools required

5/8” Wrench or Socket for 7/16” Dia. Hex Bolt

3/4” Wrench or Socket for 7/16” Hex Nut

Calibrated torque wrench. For the most accurate performance, select a torque wrench with
which the applied torque value is near the middle of the tool’s torque range. For example, if
applying 68 Nm (50 lb-ft), select a torque wrench with range of 7 Nm to 136 Nm (5 to 100
lb-ft).