Vaisala DMP248, Руководство по эксплуатации

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OPERATING MANUAL _______________________________________________________________
70_____________________________________________________________________M210492
EN
-
A
corresponding temperature value from a Pt 100 conversion table or
calculate it using the following equation:
D4)]} x R (D3 x R [D2 x R {D1 x R D0 T
+ + + + =
(7-1)
where
D0 = -243.5673014
D1 = 2.278542701
D2 = 0.002050681
D3 = -6.15025E-06
D4 = 1.34949E-08
Measurement of output currents using test
points
If a current output has been connected e.g. to a process computer, the
output current cannot be measured at the output connector X2 without
disconnecting the external load. The output current can, however, be
measured at test points CH1+/CH1- and CH2+/CH2- without
disconnecting the output wires. These test points can therefore be used
in one point offset correction against an accurate reference or in
checking the current output without disconnecting the analogue output
from the process.
X2
OPENED COVER OF THE DMP248
X15
CH2
CH1 +
+
C
H
1
+
C
H
1
-
C
H
2
+
C
H
2
-
F
IGURE
7-3
Location of the CH1 and CH2 test points
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