Siemens 7MC3040-..., Руководство по эксплуатации, Страница: 19 / 116

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Operating manual PA
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A self-test is performed when the instrument is switched on. The display
will briefly indicate the software version and after that the emissivity set-
ting. When the self-test is completed the pyrometer is ready for operation
and the display will show the current temperature reading.

NOTE !
In order to achieve a high degree of measurement accuracy and
repeatability it is important to allow the pyrometer time to warm
up. Turn the power supply on about 10 minutes before starting
(Camera version 20 min). We recommend that you protect the
feed line to the pyrometer against short circuit by using a 250 mA
micro fuse.
5.2 Current Outputs 0/4 - 20mA
PA pyrometer features two current outputs. Both of these outputs are ac-
tive current sources which supply linear output current. The user can se-
lect between two scales: either 0 - 20 mA or 4 - 20 mA. Maximum load is
500

.
The two current outputs are factory preset to 4 - 20 mA !
For all pyrometers of the PA series the current outputs are short-circuit-
proof and share one ground connection via pin 8 of the connector. Each
current output can be individually scaled and can be set either at the dis-
play or via interface.
VK 02/A
A A
Ao2 Ao1
green
yellow
Load maximal 500
Ω