User's Manual

RF300 transponder
7.8 SIMATIC RF380T
SIMATIC RF300
System Manual, 07/2016, C79000-G8976-C345-0x
243
7.8.4
Configuring instructions
7.8.4.1
Temperature dependence of the transmission window
The guidelines in the section "Planning the RF300 system" apply to configuration of heat-
resistant data memories, with the exception of the limit distance and field length at
temperatures above 85 °C. At temperatures above 85 °C, the length of the transmission
window is reduced by up to 10%.
7.8.4.2
Temperature response in cyclic operation
At ambient temperatures (T
u
) up to 110 °C, cyclic operation is not necessary, i.e. up to this
temperature, the transponder can be in constant operation.
Note
Calculation of the temperature curves
Calculation of the temperatur
e curves or of a temperature profile can be carried out on
request by Siemens AG. Exact knowledge of the internal temperature facilitates
configuration for time
-critical applications.
You can also carry out the calculation with the aid of the "SIMATIC RF T
emperature
Calculator" on the "Ident Systems Software & Documentation" DVD (refer to the section
"
DVD "Ident Systems Software & Documentation" (Page 416)").
Ambient temperatures > 110 °C
Note
Cancellation of warranty
The internal temperature of the data memory must not exceed the critical threshold of 110
°C. Each heating phase must be followed by a cooling phase. No warranty claims will
other
wise be accepted.
Some limit cycles are listed in the table below:
Table 7- 20 Limit cycles of data memory temperature
T
u
(heating up)
Heating up
T
u
(cooling down)
Cooling down
220 °C
0.5 h
25 °C
> 2 h
200 °C
1 h
25 °C
> 2 h
190 °C
1 h
25 °C
> 1 h 45 min
180 °C
2 h
25 °C
> 5 h
170 °C 2 h 25 °C > 4 h