Intek RheoVac 940 User Manual
Page 11
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Figure 8. Output Connections and Set-up
TABLE I. Ten 4-20 mA Wire Terminal Assignment
OUTPUT VARIABLE
DESCRIPTION
CONFIGURATION PIN ASSIGNMENT
Active 4-20 mA
Passive 4-20 mA
!
+
!
+
ACTUAL VOLUME FLOW [ACFM]
A
B
B
A
TOTAL MASS FLOW [lbs/hr]
C
D
D
C
WATER VAPOR MASS FLOW [lbs/hr]
E
F
F
E
RheoVac PRESSURE ["Hg]
G
H
H
G
WATER VAPOR SPECIFIC VOLUME [cu. ft/lb]
I
J
J
I
WATER to AIR MASS RATIO
K
L
L
K
RELATIVE SATURATION [%]
M
N
N
M
PARTIAL PRESSURE, WATER ["Hg]
O
P
P
O
AIR IN-LEAK [SCFM]
Q
R
R
Q
RheoVac TEMPERATURE [°F]
S
T
T
S
NOT USED
U
U
U
U
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RheoVac units have ten 4-20 mA outputs. These outputs can be configured collectively for either
passive or active transmitter. The units are shipped from the factory with the output jumpers in
the active position; i.e. the transmitter provides the current source. Figure 8 shows the locations
of the 4-20 mA select jumper, JP13 of the lower board — active position is shown.
.
CAUTION: changing the passive/active jumper changes the field wiring polarity and affects
all ten 4-20 mA channels. See Table I for wire terminal identifications.