SMAR TP303, Руководство по эксплуатации, техническому обслуживанию и инструкциям, Страница: 9 / 56

Section 1
1.1
INSTALLATION
The overall accuracy of measurement and control depends on several variables. Although the
converter has an outstanding performance, proper installation is essential, in order to maximize its
performance.
Among all factors, which may affect converter accuracy environmental conditions are the most
difficult to control. There are, however, ways of reducing the effects of temperature, humidity and
vibration.
In warm environments, the transmitter should be installed to avoid, as much as possible, direct
exposure to the sun. Installation close to lines and vessels subjected to high temperatures should
also be avoided.
Use of sunshades or heat shields to protect the transmitter from external heat sources should be
considered, if necessary.
Humidity is fatal to electronic circuits. In areas subjected to high relative humidity, the O-rings for the
electronics cover must be correctly placed. Removal of the electronics cover in the field should be
reduced to the minimum necessary, since each time it is re-moved; the circuits are exposed to the
humidity. A humidity proof coating protects the electronic circuit, but frequent exposures to humidity
may affect the protection provided. It is also important to keep the covers tightened in place. Every
time they are re-moved, the threads are exposed to corrosion, since painting cannot protect these
parts. Code approved sealing methods on conduit entering the transmitter should be employed.
Although the transmitter is virtually insensitive to vibration, installation close pumps, turbines or
other vibrating equipment should be avoided.
General
MOUNTING
The mounting of transmitter TP303 will depend on type movement, if it is linear or rotary. Two
supports are required for mounting, one for the magnet and the other for the transmitter itself. Smar
may supply then both since they are specified in the order code (See page 4.7)
Rotary Movement
Install the magnet on the valve stem using the magnet support (See figure 1.2). Install the
transmitter support on the actuator. Should the actuator be in accordance with standard VDI/VDE
5845, all you have to do is tighten the four screws with the lock washers on the standard support.
For special supports, refer to specify instructions. After installing the support on the actuator, it is
possible to mount transmitter
TP303 on the support by means of the four screws with lock washers.
Make sure that the arrow engraved on the magnet coincides with the arrow engraved on the
transmitter when the system is in mid travel. In case the installation of the transmitter or magnet is
altered, or should there be any other modification, the transmitter will require a recalibration.
Linear Movement
Install the magnet on the valve stem using the magnet support (See figure 1.3). Install the
transmitter support on the actuator. The actuator support may be secured in place as per standard
NAMUR/IEC 536-4 or in accordance with user specified boring. Install the transmitter on the support
and tighten the four screws in the threaded bores located on the side opposite to the sensor (Figure
1.3). Use lock washers in order to prevent screw slackening.
Make sure that the support is not obstructing the exhaustion outlets.