36 Electro-pneumatic positioner TZID 42/18-54 EN
5 Maintenance
The TZID positioner is virtually maintenance-free.
We recommend to check the control position periodically for conformity with the toler-
ance limit.
If the optional filter regulator is installed, it collects condensed water which must be
drained off.
Additionally, the integrated air filter must be checked for dirt accumulation on a regular
basis. If required, it must be replaced.
Under certain conditions it may become necessary to replace the pneumatic output unit.
5.1 Functional test/Readjustment
An overall functional test can only be carried out via the communication port and a PC
with special TZID software.
Otherwise, only a simple visual check can be performed. Due to the electronic function
no mechanical adjustment is possible. During operation, the positioner’s zero can be
checked and readjusted if required. When the system is switched off, an Autostroke can
be performed to re-adapt the positioner to the operating conditions.
5.2 Checking/replacing the filter regulator
If the optional filter regulator is installed, it collects condensed water which must be
drained off at intervals (by opening the drain screw of the filter housing). The intervals
depend upon the air supply quality. Additionally, the filter element (sintered bronze, 40
µm) may require cleaning or replacement, depending on the air supply quality, too.
!
WARNING
Do not make any changes to devices with
explosion protection.
IMPORTANT
If you should modify or manipulate the electronics of a positioner without
explosion protection, the positioner's warranty will expire immediately.
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