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26
Functional principle
The pyrometer work in 4-wire technology. Beside the wires for the power supply, there are two
more wires for the transmitting of the measuring signal. The infrared radiation of the measured
object will be displayed on a detector and transferred in an electrical signal. This signal will be
digitally processed and transferred in the standard temperature linear signal of 0/4 to 20 mA.
The power transmission of the measuring signal is specifically suitable for bridging great
distances. In current operation the influence of electromagnetic interferences on the measuring
signal is minimized (low resistance receiver input) Accessory devices like a digital display or a
controller, that convert the output signal of 0/4 mA to 20 mA, can be integrated in the current
loop. Please note that the maximum burden
is 700 Ω.
z.B. ANZEIGE
z.B. REGLER
...
Versorgungsspannung
z.B. Messumformer
Spannungsmessung
Anschluss-
klemmen
Ri1
Ri2
RiX
Rl1
Rl2
Rl4
RL
-
-
-
+
+
+
I-
+
U1
I+
-
Rl3
24V
0V
PE
I+
I-
Block diagram current loop
internal resistance of connected devices
lead resistance
load resistance
resistivity
pipeline length (
conductor cross section
Example:
at 100 m cable length and
approx. 15
Содержание OKS D T10.194 R
Страница 1: ...Bedienungsanleitung User Manual Piros Pyrometer OKS D T10 194 R ...
Страница 2: ......
Страница 22: ...20 K A P I T E L 8 Maßzeichnungen ...
Страница 23: ...21 ...
Страница 43: ...41 C H A P T E R 1 5 Dimensional drawing ...