Sample Conditioning System Maintenance - Endress+Hauser SS2100 Series Operating Instructions Manual

SS2100-series Sample Conditioning System
8

Sample conditioning system maintenance

The status of the SCS should be checked regularly to confirm proper operation (pressures, flows, etc.) and to detect
potential problems or failures before damage occurs. If maintenance is required, isolate the part of the system to be
serviced by following the appropriate procedure under Shutting down the SCS →.
All filter elements should be checked periodically for loading. Obstruction of a filter element can be observed by a
decreasing supply pressure or bypass flow. If loading of a filter is observed, the filter should be cleaned, and the filter
element replaced. Refer to Filter maintenance → for instruction. After observation for some time, a regular
schedule can be determined for replacement of filter elements.
No other regularly scheduled maintenance should be required for the system.
CAUTION
 Due to the chemical properties of the process samples, care must be taken to repair or replace components with
proper materials of construction.
 Maintenance personnel should have a thorough knowledge and understanding of the chemical characteristics of
the process before performing maintenance on the SCS.
Class 3B invisible laser radiation when open.
 Avoid exposure to the beam. Never open the sample cell unless directed to do so by a service representative and
the analyzer power is turned off.
The optical head has a seal and "WARNING" sticker to prevent inadvertent tampering with the device.
 Do not attempt to compromise the seal of the optical head assembly. Doing so will result in loss of device
sensitivity and inaccurate measurement data. Repairs can then only be performed by the factory and are not
covered under warranty.
8.1.1 Preventive and on-demand SCS maintenance
Preventive and on-demand maintenance is required when components and parts deteriorate or fail due to
continuous use. The performance of the entire SCS and individual components should be monitored regularly so that
maintenance can be performed on a scheduled basis to prevent a failure that could take the system out of operation.
The SCS is designed for convenient removal and replacement of component parts. Complete spare components
should always be available. In general, if a problem or failure occurs, the complete part should be removed and
replaced to limit system down time. Some components may be repaired by replacing seats and seals, for example,
and then reused. For product and spare parts ordering information, visit
center.
Under a process upset condition, it is possible for liquid to enter the sample probe and sample transport tubing.
Normally, this liquid should purge from the sample transport line and be trapped in a coalescing filter upstream of
the analyzer.
If the sample supply line does not appear to completely clear during normal operation, it may be necessary to clean
the sample transport line to remove any liquid that may adhere to the wall of the tubing. The sample transport line
should be purged dry with air or nitrogen before the system is placed back in operation.
NOTICE
 The system must be taken out of service during any cleaning of the sample transport line.
If liquid contaminates the SCS, a filter element can become obstructed, leading to a decreasing supply pressure or
bypass flow. If obstruction of a filter is observed, the filter should be cleaned and the filter element replaced.
To perform a regular SCS status check
The following steps should be performed only if there is a suspected problem with the SCS. Performing this check will
cause reading errors for up to 4 hours while the enclosure temperature stabilizes.
Endress+Hauser
Operating Instructions
www.endress.com or contact your local sales
31