SMAR TT400WH, Руководство пользователя

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Section 1
1.1
INSTALLATION
General
The overall accuracy of temperature and other measurements depends on several variables. Although
the transmitter has an outstanding performance, proper installation is essential, in order to maximize its
performance.
Among all factors, which may affect transmitter accuracy, environmental conditions are the most difficult
to control. There are, however, ways of reducing the effects of temperature, humidity and vibration.
Temperature fluctuation effects can be minimized by locating the transmitter in areas protected from ex-
treme environmental changes.
In warm environments, the transmitter should be installed to avoid, as much as possible, direct expo-
sure to the sun. Installation close to lines and vessels subjected to high temperatures should also be
avoided. For temperature measurements, sensors with cooling-neck can be used or the sensor can be
mounted separated from the transmitter housing.
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 must be
reduced to the minimum necessary, since each time it is removed, the circuits are exposed to the
humidity. The electronic circuit is protected by a humidity proof coating, 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 removed, the threads are exposed to corrosion since these parts cannot be
protected by painting. Code-approved sealing methods on conduit entering the transmitter should be
employed.
Measurement error can be decreased by connecting the sensor as close to the transmitter as possible
and using proper wires (see Section 2, Operation).
WARNING
Do not remove the graphite grease from the covers, or they may jam.
WARNING
Random, frequent, or common cause failures must not damage the equipment or result in death or
serious injure, must not harm to the environment or equipment, and must not loss of equipment or
production.
WARNING
Electrical shock can result in serious injury.
Mounting
The transmitter may be mounted according to figure 1.1.
For better visibility, the housing can be rotated by loosening the locking screw (Figure 1.3).
Reach the display and main electronic board by removing the cover with window. This cover can be
locked by the cover locking screw. To release the cover, rotate the locking screw clockwise. See Figure
1.3.