S+S Regeltechnik THERMASGARD RTF xx PLT Notice D'instruction page 15

G
Installation and Commissioning
Devices are to be connected under dead-voltage condition. Devices
must only be connected to safety extra-low voltage. Consequential
damages caused by a fault in this device are excluded from
warranty or liability. These devices must be installed and commis-
sioned by authorised specialists. The technical data and connecting
conditions shown on the device labels and in the mounting and
operating instructions delivered together with the device are
exclusively valid. Deviations from the catalogue representation are
not explicitly mentioned and are possible in terms of technical
progress and continuous improvement of our pro ducts. In case of
any modifications made by the user, all warranty claims are forfeited.
Operating this device close to other devices that do not comply with
EMC directives may influence functionality. This device must not be
used for monitoring applications, which serve the purpose of
protecting persons against hazards or injury, or as an EMERGENCY
STOP switch for systems or machinery, or for any other similar
safety-relevant purposes.
Dimensions of enclosures or enclosure accessories may show slight
tolerances on the specifications provided in these instructions.
Modifications of these records are not permitted.
In case of a complaint, only complete devices returned in original
packing will be accepted.
G
Resistance characteristics of passive temperature sensors (see last page)
In order to avoid damages ⁄ errors, preferably shielded cables are to be used.
Laying measuring cables parallel with current-carrying cables must in any case be avoided. EMC directives shall be observed!
These instruments must be installed by authorised specialists only!
Limiting deviation according to classes:
Tolerances at 0 °C:
Platinum sensors (Pt100, Pt1000):
DIN EN 60751, class B ................................................................± 0.3 K
1 ⁄ 3 DIN EN 60751, class B ........................................................± 0.1 K
Nickel sensors:
NI1000 DIN EN 43760, class B .................................................± 0.4 K
NI1000 1 ⁄ 2 DIN EN 43760, class B.........................................± 0.2 K
NI1000 TK5000 ...........................................................................± 0.4 K
Notes regarding mechanical mounting and attachment:
Mounting shall take place while observing all relevant regulations
and standards applicable for the place of measurement (e.g. such as
welding instructions, etc.). Particularly the following shall be
regarded:
– VDE ⁄ VDI directive technical temperature measurements,
measurement set - up for temperature measurements.
– The EMC directives must be adhered to.
– It is imperative to avoid parallel laying of current-carrying lines.
– We recommend to use shielded cables with
the shielding being attached at one side to the DDC ⁄ PLC.
Before mounting, make sure that the existing thermometer's technical
parameters comply with the actual conditions at the place of utilization,
in particular in respect of:
– Measuring range
– Permissible maximum pressure, flow velocity
– Installation length, tube dimensions
– Oscillations, vibrations, shocks are to be avoided (< 0.5 g)
Attention! In any case, please observe the mechanical and
thermal load limits of the protective tubes according to DIN
43763 or according to specific S+S standards!
ATTENTION, NOTE !
Testing current influences the thermometer's measuring accuracy
due to intrinsic heating and therefore, should never be greater than
as specified below:
Standard values for testing current:
Sensor current, maximum ................................................................. I
Pt1000 (thin-layer) .................................................................. < 0,6 mA
Pt100 (thin-layer) .................................................................. < 1,0 mA
Ni1000 (DIN), Ni1000 TK5000 ............................................. < 0,3 mA
NTC xx ............................................................................................ < 2 mW
LM235Z ............................................................................. 400 µ A ... 5 mA
KTY 81 - 210 .................................................................................... < 2 mA
15
max.