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5.2
Power Requirement 24 V DC
The instrument works with an operating voltage of 24 V DC. The voltage
required for operation must be supplied by a separate power supply.
This power supply unit must conform to directive DIN IEC 61010.
The current consumption is 135 mA. ARDOMETER MPA is equipped
with inverse polarity protection. The output currents and voltages share
one ground connection via pin 8 of the connector.
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 opera-
tion 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, with camera 20
min before starting. We recommend that you protect the feed line
to the pyrometer against short circuit by using a 250 mA micro-
fuse.
5.3
Current Outputs 0/4 - 20mA
ARDOMETER MPA features two current outputs. Both of these outputs
are active current sources which supply linear output current. The user
can select 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 !
Operating Manual MPA
9
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